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Mattia GM, Villain E, Nemmi F, Le Lann MV, Franceries X, Péran P. Investigating the discrimination ability of 3D convolutional neural networks applied to altered brain MRI parametric maps. Artif Intell Med 2024; 153:102897. [PMID: 38810471 DOI: 10.1016/j.artmed.2024.102897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 03/05/2024] [Accepted: 05/15/2024] [Indexed: 05/31/2024]
Abstract
Convolutional neural networks (CNNs) are gradually being recognized in the neuroimaging community as a powerful tool for image analysis. Despite their outstanding performances, some aspects of CNN functioning are still not fully understood by human operators. We postulated that the interpretability of CNNs applied to neuroimaging data could be improved by investigating their behavior when they are fed data with known characteristics. We analyzed the ability of 3D CNNs to discriminate between original and altered whole-brain parametric maps derived from diffusion-weighted magnetic resonance imaging. The alteration consisted in linearly changing the voxel intensity of either one (monoregion) or two (biregion) anatomical regions in each brain volume, but without mimicking any neuropathology. Performing ten-fold cross-validation and using a hold-out set for testing, we assessed the CNNs' discrimination ability according to the intensity of the altered regions, comparing the latter's size and relative position. Monoregion CNNs showed that the larger the modified region, the smaller the intensity increase needed to achieve good performances. Biregion CNNs systematically outperformed monoregion CNNs, but could only detect one of the two target regions when tested on the corresponding monoregion images. Exploiting prior information on training data allowed for a better understanding of CNN behavior, especially when altered regions were combined. This can inform about the complexity of CNN pattern retrieval and elucidate misclassified examples, particularly relevant for pathological data. The proposed analytical approach may serve to gain insights into CNN behavior and guide the design of enhanced detection systems exploiting our prior knowledge.
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Affiliation(s)
- Giulia Maria Mattia
- ToNIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France.
| | - Edouard Villain
- ToNIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France; LAAS CNRS, Université de Toulouse, CNRS, INSA, UPS, Toulouse, France.
| | - Federico Nemmi
- ToNIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France.
| | | | - Xavier Franceries
- CRCT, Centre de Recherche en Cancérologie de Toulouse, Inserm, UPS, Toulouse, France.
| | - Patrice Péran
- ToNIC, Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France.
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2
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Kang K, Fleming K, Sathe A, Muller J, Harrop J, Middleton D, Heller J, Sharan A, Mohamed F, Krisa L, Alizadeh M. Microstructural alterations of major thalamic nuclei in the chronic pediatric spinal cord injured population. World Neurosurg X 2024; 21:100268. [PMID: 38187507 PMCID: PMC10767188 DOI: 10.1016/j.wnsx.2023.100268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 07/12/2023] [Accepted: 11/28/2023] [Indexed: 01/09/2024] Open
Abstract
Background The brain undergoes reorganization following spinal cord injury (SCI), but little is known about how the thalamus is affected in pediatric SCIs. Purpose To characterize microstructural alterations in the thalamus after SCI with diffusion tensor imaging (DTI) metrics. Methods 18 pediatric participants with chronic SCI (8-20 years) were stratified using the American Spinal Injury Association Impairment Scale (AIS) into groups: A, B, and C/D. DTI of the brain used a 3 T Siemens Verio MRI using the parameters: 20 directions, number of averages = 3, b = 1000 s/mm2, voxel size = 1.8 mm × 1.8 mm, slice thickness = 5 mm, TE = 95 ms, TR = 4300 ms, 30 slices, FOV = 230 × 230 mm2, matrix = 128 × 128, acquisition time = 4:45 min. Diffusion data was processed to generate DTI metrics FA, MD, AD, and RD. Data analysis DTI metrics were acquired by superimposing the AAL3 thalamic atlas onto participant diffusion images registered to MNI152 space. We utilized a multiple Mann-Whitney U-test to compare between AIS groups, considering values of p ≤ 0.05 as significant. Results FA, AD, RD, and MD significantly differed in thalamic nuclei between AIS groups A vs B and B vs C/D. Significant nuclei include the right ventral anterior, left intralaminar, bilateral lateral pulvinar, and right lateral geniculate. Conclusion Our findings suggest the presence of microstructural alterations based on SCI severity in pediatric patients. These results are encouraging and warrant further study.
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Affiliation(s)
- K. Kang
- Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut St., Philadelphia, PA, 19107, USA
| | - K. Fleming
- Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut St., Philadelphia, PA, 19107, USA
| | - A. Sathe
- Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut St., Philadelphia, PA, 19107, USA
| | - J. Muller
- Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut St., Philadelphia, PA, 19107, USA
| | - J. Harrop
- Department of Neurosurgery, Thomas Jefferson University, 909 Walnut Street, 2nd Floor, Philadelphia, PA, 19107, USA
| | - D. Middleton
- Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut St., Philadelphia, PA, 19107, USA
| | - J.E. Heller
- Department of Neurosurgery, Thomas Jefferson University, 909 Walnut Street, 2nd Floor, Philadelphia, PA, 19107, USA
| | - A. Sharan
- Department of Neurosurgery, Thomas Jefferson University, 909 Walnut Street, 2nd Floor, Philadelphia, PA, 19107, USA
| | - F. Mohamed
- Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut St., Philadelphia, PA, 19107, USA
| | - L. Krisa
- Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut St., Philadelphia, PA, 19107, USA
| | - M. Alizadeh
- Department of Neurosurgery, Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut St., Philadelphia, PA, 19107, USA
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Carrillo-Barberà P, Rondelli AM, Morante-Redolat JM, Vernay B, Williams A, Bankhead P. AimSeg: A machine-learning-aided tool for axon, inner tongue and myelin segmentation. PLoS Comput Biol 2023; 19:e1010845. [PMID: 37976310 PMCID: PMC10691719 DOI: 10.1371/journal.pcbi.1010845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 12/01/2023] [Accepted: 11/05/2023] [Indexed: 11/19/2023] Open
Abstract
Electron microscopy (EM) images of axons and their ensheathing myelin from both the central and peripheral nervous system are used for assessing myelin formation, degeneration (demyelination) and regeneration (remyelination). The g-ratio is the gold standard measure of assessing myelin thickness and quality, and traditionally is determined from measurements made manually from EM images-a time-consuming endeavour with limited reproducibility. These measurements have also historically neglected the innermost uncompacted myelin sheath, known as the inner tongue. Nonetheless, the inner tongue has been shown to be important for myelin growth and some studies have reported that certain conditions can elicit its enlargement. Ignoring this fact may bias the standard g-ratio analysis, whereas quantifying the uncompacted myelin has the potential to provide novel insights in the myelin field. In this regard, we have developed AimSeg, a bioimage analysis tool for axon, inner tongue and myelin segmentation. Aided by machine learning classifiers trained on transmission EM (TEM) images of tissue undergoing remyelination, AimSeg can be used either as an automated workflow or as a user-assisted segmentation tool. Validation results on TEM data from both healthy and remyelinating samples show good performance in segmenting all three fibre components, with the assisted segmentation showing the potential for further improvement with minimal user intervention. This results in a considerable reduction in time for analysis compared with manual annotation. AimSeg could also be used to build larger, high quality ground truth datasets to train novel deep learning models. Implemented in Fiji, AimSeg can use machine learning classifiers trained in ilastik. This, combined with a user-friendly interface and the ability to quantify uncompacted myelin, makes AimSeg a unique tool to assess myelin growth.
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Affiliation(s)
- Pau Carrillo-Barberà
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Universitat de València, Valencia, Spain
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universitat de València, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BioTecMed), Universitat de València, Valencia, Spain
- Centre for Genomic & Experimental Medicine, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, United Kingdom
| | - Ana Maria Rondelli
- Centre for Regenerative Medicine, Institute for Regeneration and Repair, University of Edinburgh, Edinburgh BioQuarter, Edinburgh, United Kingdom
- MS Society Edinburgh Centre for MS Research, Edinburgh BioQuarter, Edinburgh, United Kingdom
| | - Jose Manuel Morante-Redolat
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Universitat de València, Valencia, Spain
- Departamento de Biología Celular, Biología Funcional y Antropología Física, Universitat de València, Valencia, Spain
- Instituto de Biotecnología y Biomedicina (BioTecMed), Universitat de València, Valencia, Spain
| | - Bertrand Vernay
- Centre for Regenerative Medicine, Institute for Regeneration and Repair, University of Edinburgh, Edinburgh BioQuarter, Edinburgh, United Kingdom
- Centre d’imagerie, Institut de Génétique et de Biologie Moléculaire et Cellulaire CNRS UMR 7104—Inserm U 1258, Illkirch, France
| | - Anna Williams
- Centre for Regenerative Medicine, Institute for Regeneration and Repair, University of Edinburgh, Edinburgh BioQuarter, Edinburgh, United Kingdom
- MS Society Edinburgh Centre for MS Research, Edinburgh BioQuarter, Edinburgh, United Kingdom
| | - Peter Bankhead
- Centre for Genomic & Experimental Medicine, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, United Kingdom
- Edinburgh Pathology and CRUK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, United Kingdom
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Zhu Y, Du R, He Z, Pang X, Yu W, Huang X. Assessing the association between white matter lesions and Parkinson's disease. Neurol Sci 2023; 44:897-903. [PMID: 36350453 DOI: 10.1007/s10072-022-06494-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 11/02/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND The association between white matter (WM) lesions and Parkinson's disease (PD) was not fully established. We therefore applied Mendelian randomization (MR) analyses to identify the causal effect between white matter lesions and PD. METHODS We performed a bidirectional two-sample Mendelian randomization (MR) study to investigate the association between three WM phenotypes-white matter hyperintensities (WMH, N = 18,381), fractional anisotropy (FA, N = 17,673), and mean diffusivity (MD, N = 17,467)-with PD (N = 482,730) using summary statistics from genome-wide association studies (GWAS). The inverse variance weighted (IVW), weighted median, MR-Egger, and MR-PRESSO methods were used to evaluate the causal estimate. RESULTS Significant evidence was suggested that higher MD was associated with a higher PD risk (OR = 1.049, 95% CI = 1.018-1.081, p = 0.022) when the outlier was removed using MR-PRESSO method. Moreover, genetically predicted PD was associated with a lower WMH load (IVW β = - 0.047, 95% CI = - 0.085 to - 0.009, p = 0.016) and a higher FA (β = 0.185, 95% CI = 0.021-0.349, p = 0.027). No evidence of pleiotropy was found using MR-Egger intercept. CONCLUSION Our findings provided genetic support that white matter microstructural integrity lesions might increase the risk of PD. However, genetically predicted PD was potentially associated with a lower load of white matter lesions.
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Affiliation(s)
- Yahui Zhu
- Medical School of Chinese PLA, Beijing, China.,Department of Neurology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Rongrong Du
- Department of Neurology, the First Medical Center, Chinese PLA General Hospital, Beijing, China.,College of Medicine, Nankai University, Tianjin, China
| | - Zhengqing He
- Medical School of Chinese PLA, Beijing, China.,Department of Neurology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xinyuan Pang
- Department of Neurology, the First Medical Center, Chinese PLA General Hospital, Beijing, China.,College of Medicine, Nankai University, Tianjin, China
| | - Wenxiu Yu
- Medical School of Chinese PLA, Beijing, China.,Department of Neurology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xusheng Huang
- Medical School of Chinese PLA, Beijing, China. .,Department of Neurology, the First Medical Center, Chinese PLA General Hospital, Beijing, China.
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Brown G, Hakun J, Lewis MM, De Jesus S, Du G, Eslinger PJ, Kong L, Huang X. Frontostriatal and limbic contributions to cognitive decline in Parkinson's disease. J Neuroimaging 2023; 33:121-133. [PMID: 36068704 PMCID: PMC9840678 DOI: 10.1111/jon.13045] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 08/21/2022] [Accepted: 08/22/2022] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND AND PURPOSE The circuitry underlying heterogenous cognitive profiles in Parkinson's disease (PD) remains unclear. The purpose of this study is to investigate whether structural changes in frontostriatal and limbic pathways contribute to different cognitive trajectories in PD. METHODS We obtained clinical and multimodal MRI data from 120 control and 122 PD subjects without dementia or severe motor disability. T1/T2-weighted images estimated volume, and diffusion imaging evaluated fractional anisotropy (FA) of frontostriatal (striatum and frontostriatal white matter [FSWM]) and limbic (hippocampus and fornix) structures. Montreal Cognitive Assessment (MoCA) gauged total and domain-specific (attention/executive and memory) cognitive function. Linear mixed-effects models were used to compare MRI and cognitive progression over 4.5 years between controls and PD and evaluate associations between baseline MRI and cognitive changes in PD. RESULTS At baseline, control and PD groups were comparable, except PD participants had smaller striatal volume (p < 0.001). Longitudinally, PD showed faster decline in hippocampal volume, FSWM FA, and fornix FA (ps < .016), but not striatal volume (p = .218). Total and domain-specific MoCA scores declined faster in PD (ps < .030). In PD, lower baseline hippocampal volume (p = .005) and fornix FA (p = .032), but not striatal volume (p = .662) or FSWM FA (p = .143), were associated with faster total MoCA decline. Baseline frontostriatal metrics of striatal volume and FSWM FA were associated with faster attention/executive decline (p < .038), whereas lower baseline hippocampal volume was associated with faster memory decline (p = .005). CONCLUSION In PD, frontostriatal structural metrics are associated with attention/executive tasks, whereas limbic changes correlated with faster global cognitive decline, particularly in memory tasks.
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Affiliation(s)
- Gregory Brown
- Department of Neurology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Jonathan Hakun
- Department of Neurology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Mechelle M. Lewis
- Department of Neurology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
- Department of Pharmacology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Sol De Jesus
- Department of Neurology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Guangwei Du
- Department of Pharmacology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Paul J. Eslinger
- Department of Neurology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Lan Kong
- Department of Public Health Sciences, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Xuemei Huang
- Department of Neurology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
- Department of Pharmacology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
- Department of Public Health Sciences, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
- Department of Neurosurgery, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
- Department of Kinesiology, Penn State University Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
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Bergamino M, Keeling EG, Ray NJ, Macerollo A, Silverdale M, Stokes AM. Structural connectivity and brain network analyses in Parkinson's disease: A cross-sectional and longitudinal study. Front Neurol 2023; 14:1137780. [PMID: 37034088 PMCID: PMC10076650 DOI: 10.3389/fneur.2023.1137780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 03/06/2023] [Indexed: 04/11/2023] Open
Abstract
Introduction Parkinson's disease (PD) is an idiopathic disease of the central nervous system characterized by both motor and non-motor symptoms. It is the second most common neurodegenerative disease. Magnetic resonance imaging (MRI) can reveal underlying brain changes associated with PD. Objective In this study, structural connectivity and white matter networks were analyzed by diffusion MRI and graph theory in a cohort of patients with PD and a cohort of healthy controls (HC) obtained from the Parkinson's Progression Markers Initiative (PPMI) database in a cross-sectional analysis. Furthermore, we investigated longitudinal changes in the PD cohort over 36 months. Result Compared with the control group, participants with PD showed lower structural connectivity in several brain areas, including the corpus callosum, fornix, and uncinate fasciculus, which were also confirmed by a large effect-size. Additionally, altered connectivity between baseline and after 36 months was found in different network paths inside the white matter with a medium effect-size. Network analysis showed trends toward lower network density in PD compared with HC at baseline and after 36 months, though not significant after correction. Significant differences were observed in nodal degree and strength in several nodes. Conclusion In conclusion, altered structural and network metrics in several brain regions, such as corpus callosum, fornix, and cingulum were found in PD, compared to HC. We also report altered connectivity in the PD group after 36 months, reflecting the impact of both PD pathology and aging processes. These results indicate that structural and network metrics might yield insight into network reorganization that occurs in PD.
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Affiliation(s)
- Maurizio Bergamino
- Barrow Neuroimaging Innovation Center, Barrow Neurological Institute, Phoenix, AZ, United States
- *Correspondence: Maurizio Bergamino
| | - Elizabeth G. Keeling
- Barrow Neuroimaging Innovation Center, Barrow Neurological Institute, Phoenix, AZ, United States
- School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Nicola J. Ray
- Health, Psychology and Communities Research Centre, Department of Psychology, Manchester Metropolitan University, Manchester, United Kingdom
| | - Antonella Macerollo
- Neurology Department, The Walton Centre NHS Foundation Trust, Liverpool, United Kingdom
- Institute of Systems, Molecular and Integrative Biology, School of Life Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Monty Silverdale
- Manchester Centre for Clinical Neurosciences, University of Manchester, Manchester, United Kingdom
| | - Ashley M. Stokes
- Barrow Neuroimaging Innovation Center, Barrow Neurological Institute, Phoenix, AZ, United States
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Rong Y, Xu Z, Zhu Y, Zhang X, Lai L, Sun S, Gao M, Guo P, Zhang G, Geng Y, Ma X, Wu S, Yang L, Shen Z, Guan J. Combination of Quantitative Susceptibility Mapping and Diffusion Kurtosis Imaging Provides Potential Biomarkers for Early-Stage Parkinson's Disease. ACS Chem Neurosci 2022; 13:2699-2708. [PMID: 36047877 DOI: 10.1021/acschemneuro.2c00321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Purpose: This study aimed to detect changes in iron deposition and neural microstructure in the substantia nigra (SN), red nucleus (RN), and basal ganglia of Parkinson's disease (PD) patients at different stages using quantitative susceptibility mapping and diffusion kurtosis imaging to identify potential indicators of early-stage PD. Methods: We enrolled 20 early-stage and 15 late-stage PD patients, as well as 20 age- and sex-matched controls. All participants underwent quantitative susceptibility mapping and diffusion kurtosis imaging to determine magnetic susceptibility (MS), fractional anisotropy (FA), mean diffusivity (MD), and mean kurtosis (MK) in several brain regions. Results: Compared with the control group, MS and MK values in the SN were significantly increased in the early- and late-stage PD group, whereas MS values in the red nucleus (RN), globus pallidus (GP), and caudate nucleus (CN), FA value in the CN and GP, and MK value in the CN and putamen (PU) were significantly increased in the late-stage PD group. There were positive correlations between MS and MK values in the CN and MS and FA values in the GP. Furthermore, the combination of MS and MK values in the SN provided high accuracy for distinguishing early-stage PD patients from controls. Conclusions: This study identified MS and MK in the SN as potential indicators of early-stage PD.
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Affiliation(s)
- Yunjie Rong
- Department of Ultrasound, Foshan Women and Children's Hospital Affiliated to Southern Medical University, Foshan 528000, China
| | - Zhifeng Xu
- Department of Radiology, The First People's Hospital of Foshan, Foshan 528041, China
| | - Ye Zhu
- Department of Radiology, The First People's Hospital of Foshan, Foshan 528041, China
| | - Xianhai Zhang
- Department of Radiology, The First People's Hospital of Foshan, Foshan 528041, China
| | - Lingfeng Lai
- Department of Radiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou 515041, China
| | - Shuyi Sun
- Department of Radiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou 515041, China
| | - Mingyong Gao
- Department of Radiology, The First People's Hospital of Foshan, Foshan 528041, China
| | - Pi Guo
- Laboratory of Statistics, Shantou University Medical College, Shantou 515041, China
| | - Guohua Zhang
- Department of Neurology, The First People's Hospital of Foshan, Foshan 528041, China
| | - Yiqun Geng
- Laboratory of Molecular Pathology, Shantou University Medical College, Shantou 515041, China
- Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou 515041, Guangdong, China
| | - Xilun Ma
- Department of Radiology, The First Affiliated Hospital of Shantou University Medical College, Shantou 515000, China
| | - Shuohua Wu
- Department of Radiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou 515041, China
| | - Lin Yang
- Department of Radiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou 515041, China
| | | | - Jitian Guan
- Department of Radiology, The Second Affiliated Hospital of Shantou University Medical College, Shantou 515041, China
- Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou 515041, Guangdong, China
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Imaging the Limbic System in Parkinson's Disease-A Review of Limbic Pathology and Clinical Symptoms. Brain Sci 2022; 12:brainsci12091248. [PMID: 36138984 PMCID: PMC9496800 DOI: 10.3390/brainsci12091248] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 01/09/2023] Open
Abstract
The limbic system describes a complex of brain structures central for memory, learning, as well as goal directed and emotional behavior. In addition to pathological studies, recent findings using in vivo structural and functional imaging of the brain pinpoint the vulnerability of limbic structures to neurodegeneration in Parkinson's disease (PD) throughout the disease course. Accordingly, dysfunction of the limbic system is critically related to the symptom complex which characterizes PD, including neuropsychiatric, vegetative, and motor symptoms, and their heterogeneity in patients with PD. The aim of this systematic review was to put the spotlight on neuroimaging of the limbic system in PD and to give an overview of the most important structures affected by the disease, their function, disease related alterations, and corresponding clinical manifestations. PubMed was searched in order to identify the most recent studies that investigate the limbic system in PD with the help of neuroimaging methods. First, PD related neuropathological changes and corresponding clinical symptoms of each limbic system region are reviewed, and, finally, a network integration of the limbic system within the complex of PD pathology is discussed.
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Haghshomar M, Shobeiri P, Seyedi SA, Abbasi-Feijani F, Poopak A, Sotoudeh H, Kamali A, Aarabi MH. Cerebellar Microstructural Abnormalities in Parkinson's Disease: a Systematic Review of Diffusion Tensor Imaging Studies. CEREBELLUM (LONDON, ENGLAND) 2022; 21:545-571. [PMID: 35001330 DOI: 10.1007/s12311-021-01355-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/01/2021] [Indexed: 06/14/2023]
Abstract
Diffusion tensor imaging (DTI) is now having a strong momentum in research to evaluate the neural fibers of the CNS. This technique can study white matter (WM) microstructure in neurodegenerative disorders, including Parkinson's disease (PD). Previous neuroimaging studies have suggested cerebellar involvement in the pathogenesis of PD, and these cerebellum alterations can correlate with PD symptoms and stages. Using the PRISMA 2020 framework, PubMed and EMBASE were searched to retrieve relevant articles. Our search revealed 472 articles. After screening titles and abstracts, and full-text review, and implementing the inclusion criteria, 68 papers were selected for synthesis. Reviewing the selected studies revealed that the patterns of reduction in cerebellum WM integrity, assessed by fractional anisotropy, mean diffusivity, radial diffusivity, and axial diffusivity measures can differ symptoms and stages of PD. Cerebellar diffusion tensor imaging (DTI) changes in PD patients with "postural instability and gait difficulty" are significantly different from "tremor dominant" PD patients. Freezing of the gate is strongly related to cerebellar involvement depicted by DTI. The "reduced cognition," "visual disturbances," "sleep disorders," "depression," and "olfactory dysfunction" are not related to cerebellum microstructural changes on DTI, while "impulsive-compulsive behavior" can be linked to cerebellar WM alteration. Finally, higher PD stages and longer disease duration are associated with cerebellum white matter alteration depicted by DTI. Depiction of cerebellar white matter involvement in PD is feasible by DTI. There is an association with disease duration and severity and several clinical presentations with DTI findings. This clinical-imaging association may eventually improve disease management.
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Affiliation(s)
- Maryam Haghshomar
- Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
- NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Parnian Shobeiri
- Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
- NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
- Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, No. 10, Al-e-Ahmad and Chamran Highway intersection, Tehran, 1411713137, Iran.
| | | | | | - Amirhossein Poopak
- Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Houman Sotoudeh
- Department of Radiology and Neurology, University of Alabama at Birmingham (UAB), Birmingham, AL, USA
| | - Arash Kamali
- Department of Diagnostic and Interventional Radiology, University of Texas McGovern Medical School, Houston, TX, USA
| | - Mohammad Hadi Aarabi
- Department of Neuroscience (DNS), Padova Neuroscience Center-PNC, University of Padova, Padua, Italy
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Vo NQ, Hoang NT, Nguyen DD, Nguyen THD, Le TB, Le NTN, Nguyen TT. Quantitative parameters of diffusion tensor imaging in the evaluation of carpal tunnel syndrome. Quant Imaging Med Surg 2022; 12:3379-3390. [PMID: 35655836 PMCID: PMC9131322 DOI: 10.21037/qims-21-910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 03/16/2022] [Indexed: 11/30/2023]
Abstract
BACKGROUND To explore the value of diffusion tensor imaging (DTI)-derived metrics in quantitative evaluation of carpal tunnel syndrome (CTS). METHODS This prospective cross-sectional study included 39 wrists from 24 symptomatic CTS patients, who underwent clinical, electrophysiological, and magnetic resonance imaging (MRI) evaluations. In addition, 10 wrists of 6 healthy participants were included as controls. Clinical and nerve conduction study (NCS) findings were evaluated and graded according to the Boston Carpal Tunnel Questionnaire (BCTQ) and the American Association of Neuromuscular and Electrodiagnostic Medicine (AANEM), respectively. We performed MRI using a 1.5 Tesla scanner. Mean diffusivity (MD), fractional anisotropy (FA), axial diffusivity (AD), and radial diffusivity (RD) of the median nerve at the distal radioulnar joint (DRUJ) (d), the inlet of the carpal tunnel (CT) at the pisiform level (i), the middle of the CT (m) and the outlet of the CT at the level of the hook of hamate (o), cross-sectional area at the inlet of the CT (iCSA), and the difference between MD and FA of the DRUJ and the outlet of CT (Delta MD and Delta FA) were measured. RESULTS The CTS patients had significantly lower FA [for example, oFA: mean difference 0.09, 95% confidence interval (CI): 0.05 to 0.12] and significantly higher MD than healthy participants (for example, iMD: mean difference 0.3, 95% CI: 0.03 to 0.57). There was a negative correlation between iCSA with iFA and between mFA and oFA (-0.5 CONCLUSIONS The DTI-derived quantitative metrics add potential value to the evaluation of CTS. Alterations in the FA of the median nerve along the CT are the most significant features of CTS and reflect the degree of median nerve compression and clinical deficit. With a cutoff value of 0.45, FA at the carpal outlet has a sensitivity and specificity of 87.5% and 85.7% in the diagnosis of CTS, respectively.
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Affiliation(s)
- Nhu Quynh Vo
- Department of Radiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Ngoc Thanh Hoang
- Department of Radiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Duy Duan Nguyen
- Department of Internal Medicine, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Thi Hieu Dung Nguyen
- Department of Physiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Trong Binh Le
- Department of Radiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Nghi Thanh Nhan Le
- Department of Surgery, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Thanh Thao Nguyen
- Department of Radiology, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
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11
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Kan H, Uchida Y, Ueki Y, Arai N, Tsubokura S, Kunitomo H, Kasai H, Aoyama K, Matsukawa N, Shibamoto Y. R2* relaxometry analysis for mapping of white matter alteration in Parkinson's disease with mild cognitive impairment. Neuroimage Clin 2022; 33:102938. [PMID: 34998126 PMCID: PMC8741619 DOI: 10.1016/j.nicl.2022.102938] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/22/2021] [Accepted: 01/03/2022] [Indexed: 12/01/2022]
Abstract
R2* relaxometry analysis combined with QSM revealed detail of WM alteration in PD-MCI. R2* relaxometry analysis can detect slight demyelination in PD-MCI. R2* value shows potential for early evaluation of cognitive decline in PD.
Background R2* relaxometry analysis combined with quantitative susceptibility mapping (QSM), which has high sensitivity to iron deposition, can distinguish microstructural changes of the white matter (WM) and iron deposition, thereby providing a sensitive and biologically specific measure of the WM owing to the changes in myelin and its surrounding environment. This study aimed to explore the microstructural WM alterations associated with cognitive impairment in patients with Parkinson’s disease (PD) using R2* relaxometry analysis combined with QSM. Materials and methods We enrolled 24 patients with PD and mild cognitive impairment (PD-MCI), 22 patients with PD and normal cognition (PD-CN), and 19 age- and sex-matched healthy controls (HC). All participants underwent Montreal Cognitive Assessment (MoCA) and brain magnetic resonance imaging, including structural three-dimensional T1-weighted images and multiple spoiled gradient echo sequence (mGRE). The R2* and susceptibility maps were estimated from the multiple magnitude images of mGRE. The susceptibility maps were used for verifying iron deposition in the WM. The voxel-based R2* of the entire WM and its correlation with cognitive performance were analyzed. Results In the voxel-based group comparisons, the R2* in the PD-MCI group was lower in some WM regions, including the corpus callosum, than R2* in the PD-CN and HC groups. The mean susceptibility values in almost all brain regions were negative and close-to-zero values, indicating no detectable paramagnetic iron deposition in the WM of all subjects. There was a significant positive correlation between R2* and MoCA in some regions of the WM, mainly the corpus callosum and left hemisphere. Conclusion R2* relaxometry analysis for WM microstructural changes provided further biologic insights on demyelination and changes in the surrounding environment, supported by the QSM results demonstrating no iron existence. This analysis highlighted the potential for the early evaluation of cognitive decline in patients with PD.
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Affiliation(s)
- Hirohito Kan
- Department of Integrated Health Sciences, Nagoya University Graduate School of Medicine, Japan; Department of Radiology, Nagoya City University, Graduate School of Medical Sciences, Japan.
| | - Yuto Uchida
- Department of Neurology, Nagoya City University, Graduate School of Medical Sciences, Japan; Department of Neurology, Toyokawa City Hospital, Japan.
| | - Yoshino Ueki
- Department of Rehabilitation Medicine, Nagoya City University, Graduate School of Medical Sciences, Japan.
| | - Nobuyuki Arai
- Department of Radiology, Suzuka University of Medical Science, Japan.
| | | | - Hiroshi Kunitomo
- Department of Radiology, Nagoya City University Hospital, Japan.
| | - Harumasa Kasai
- Department of Radiology, Nagoya City University Hospital, Japan
| | - Kiminori Aoyama
- Department of Rehabilitation Medicine, Nagoya City University, Graduate School of Medical Sciences, Japan
| | - Noriyuki Matsukawa
- Department of Neurology, Nagoya City University, Graduate School of Medical Sciences, Japan.
| | - Yuta Shibamoto
- Department of Radiology, Nagoya City University, Graduate School of Medical Sciences, Japan.
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12
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Chabran E, Mondino M, Noblet V, Degiorgis L, Loureiro de Sousa P, Blanc F. Microstructural changes in prodromal dementia with Lewy bodies compared to normal aging: multiparametric quantitative MRI evidences. Eur J Neurosci 2021; 55:611-623. [PMID: 34888964 DOI: 10.1111/ejn.15558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 11/08/2021] [Accepted: 11/20/2021] [Indexed: 11/29/2022]
Abstract
Dementia with Lewy bodies (DLB) patients show few significant macroscopic structural changes, especially at the early stages of the disease, making quantitative MRI especially interesting to explore more subtle changes that are not detectable by conventional volumetric techniques. Microstructural alterations have been reported in DLB at the dementia stage, but no study to date was conducted in prodromal patients. Here, quantitative MRI data were collected from 46 DLB prodromal patients and 20 healthy elderly subjects, who also underwent a detailed clinical examination including the Mayo Clinic Fluctuation Scale. We conducted voxel-wise between-group comparisons in diffusion tensor imaging (DTI) metrics and in R2* mapping, along with a multivariate analysis combining the two modalities. We highlighted multiple grey matter and white matter microstructural changes in DLB patients at the prodromal stage, compared to control subjects. Our multivariate analysis identified three distinct regional patterns of DTI and R2* changes (anterior, anteromedial, posterior) in DLB patients, that could reflect different neuropathological processes across brain regions. We also observed an association between R2* alterations in the thalamus, and the severity of fluctuations, in the DLB group. These preliminary findings are promising and require future investigations to better understand the biological underpinnings of microstructural alterations.
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Affiliation(s)
- Eléna Chabran
- ICube Laboratory UMR 7357 and FMTS (Fédération de Médecine Translationnelle de Strasbourg), IMIS team and IRIS plateform, University of Strasbourg and CNRS, Strasbourg, France
| | - Mary Mondino
- ICube Laboratory UMR 7357 and FMTS (Fédération de Médecine Translationnelle de Strasbourg), IMIS team and IRIS plateform, University of Strasbourg and CNRS, Strasbourg, France
| | - Vincent Noblet
- ICube Laboratory UMR 7357 and FMTS (Fédération de Médecine Translationnelle de Strasbourg), IMIS team and IRIS plateform, University of Strasbourg and CNRS, Strasbourg, France
| | - Laetitia Degiorgis
- ICube Laboratory UMR 7357 and FMTS (Fédération de Médecine Translationnelle de Strasbourg), IMIS team and IRIS plateform, University of Strasbourg and CNRS, Strasbourg, France
| | - Paulo Loureiro de Sousa
- ICube Laboratory UMR 7357 and FMTS (Fédération de Médecine Translationnelle de Strasbourg), IMIS team and IRIS plateform, University of Strasbourg and CNRS, Strasbourg, France
| | - Frédéric Blanc
- ICube Laboratory UMR 7357 and FMTS (Fédération de Médecine Translationnelle de Strasbourg), IMIS team and IRIS plateform, University of Strasbourg and CNRS, Strasbourg, France.,CM2R (Research and Resources Memory Centre), Geriatric Day Hospital and Neuropsychology Unit, Geriatrics Department, University Hospitals of Strasbourg, Strasbourg, France
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13
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Dolatshahi M, Ashraf-Ganjouei A, Wu IW, Zhang Y, Aarabi MH, Tosun D. White matter changes in drug-naïve Parkinson's disease patients with impulse control & probable REM sleep behavior disorders. J Neurol Sci 2021; 430:120032. [PMID: 34688191 DOI: 10.1016/j.jns.2021.120032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 09/24/2021] [Accepted: 10/15/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND According to epidemiological studies, Parkinson's disease (PD) patients with probable REM sleep behavior disorder (pRBD) are more prone to develop impulse control disorders (ICDs), which is shown to be present in drug-naïve PD patients, and vice versa. OBJECTIVES To investigate white-matter integrity differences, with and without comorbid pRBD and ICDs. METHODS 149 de-novo PD patients and 30 age- and gender-matched controls from the Parkinson's Progression Markers Initiative were studied. PD subjects were categorized into four groups with and without these comorbidities. We investigated the white matter integrity differences between these groups. RESULTS PDs with only ICDs manifested greater fractional anisotropy (FA) and lower mean diffusivity (MD) in ipsilateral cerebellar connections when compared to controls and to Parkinson's with both comorbid disorders. In contrast, significantly lower FA and higher MD in the ipsilateral fornix-stria-terminalis was observed in PDs with only pRBD compared to controls and to PDs without either comorbid disorder. Also, PDs with only pRBD manifested greater FA in contralateral putamen when compared to controls. CONCLUSIONS Our results suggest the presence of an underlying neural network in PDs with ICDs, particularly involving cerebellar connections, which makes the subjects susceptible to pRBD. Lower white-matter integrity in the fornix of PDs with only pRBD suggests a neuropathological pathway specific to sleep behavior disorder, independent of impulse control disorders. Greater white-matter integrity observed in PDs without comorbid ICDs, regardless of their comorbid pRBD status, might reflect compensatory mechanisms. Targeted therapies for this particular neuropathology may help prevent these comorbidities.
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Affiliation(s)
- Mahsa Dolatshahi
- Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | | | - I-Wei Wu
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States
| | - Yu Zhang
- Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, United States
| | - Mohammad Hadi Aarabi
- Department of Neuroscience, Padova Neuroscience Center (PNC), University of Padova, Padova, Italy
| | - Duygu Tosun
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States.
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14
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Small molecule screening as an approach to encounter inefficient myelin repair. Curr Opin Pharmacol 2021; 61:127-135. [PMID: 34753035 DOI: 10.1016/j.coph.2021.09.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 09/28/2021] [Accepted: 09/30/2021] [Indexed: 11/20/2022]
Abstract
While current multiple sclerosis therapies are focused on immunomodulation, thereby slowing down disease progression, scientific interest has nowadays been shifted toward regenerative therapies aiming at reversing already existing deficits. The application of chemical compounds was proven to be valuable for the understanding of oligodendrogenesis and for exposing mechanisms that can boost remyelination. However, sufficient myelin repair has not been achieved yet, thus underscoring the need for more studies toward this unmet clinical goal. In this regard, many research groups have significantly contributed to the field via developing compound screening approaches or using single substances. We, here, present an overview of recent studies addressing the identification of myelin repair drugs and provide insights into technical aspects and identified substances.
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15
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Huang LC, Chen LG, Wu PA, Pang CY, Lin SZ, Tsai ST, Chen SY. Effect of deep brain stimulation on brain network and white matter integrity in Parkinson's disease. CNS Neurosci Ther 2021; 28:92-104. [PMID: 34643338 PMCID: PMC8673709 DOI: 10.1111/cns.13741] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 11/27/2022] Open
Abstract
Aims The effects of subthalamic nucleus (STN)‐deep brain stimulation (DBS) on brain topological metrics, functional connectivity (FC), and white matter integrity were studied in levodopa‐treated Parkinson’s disease (PD) patients before and after DBS. Methods Clinical assessment, resting‐state functional MRI (rs‐fMRI), and diffusion tensor imaging (DTI) were performed pre‐ and post‐DBS in 15 PD patients, using a within‐subject design. The rs‐fMRI identified brain network topological metric and FC changes using graph‐theory‐ and seed‐based methods. White matter integrity was determined by DTI and tract‐based spatial statistics. Results Unified Parkinson's Disease Rating Scale III (UPDRS‐ III) scores were significantly improved by 35.3% (p < 0.01) after DBS in PD patients, compared with pre‐DBS patients without medication. Post‐DBS PD patients showed a significant decrease in the graph‐theory‐based degree and cost in the middle temporal gyrus and temporo‐occipital part‐Right. Changes in FC were seen in four brain regions, and a decrease in white matter integrity was seen in the left anterior corona radiata. The topological metrics changes were correlated with Beck Depression Inventory II (BDI‐II) and the FC changes with UPDRS‐III scores. Conclusion STN‐DBS modulated graph‐theoretical metrics, FC, and white matter integrity. Brain connectivity changes observed with multi‐modal imaging were also associated with postoperative clinical improvement. These findings suggest that the effects of STN‐DBS are caused by brain network alterations.
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Affiliation(s)
- Li-Chuan Huang
- Department of Medical Imaging, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,Department of Medical Imaging and Radiological Sciences, Tzu Chi University of Science and Technology, Hualien, Taiwan
| | - Li-Guo Chen
- Department of Medical Imaging, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Ping-An Wu
- Department of Medical Imaging, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Cheng-Yoong Pang
- Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,Cardiovascular and Metabolomics Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Shinn-Zong Lin
- Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Sheng-Tzung Tsai
- Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Shin-Yuan Chen
- Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.,School of Medicine, Tzu Chi University, Hualien, Taiwan
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16
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Hybrid PET-MRI for early detection of dopaminergic dysfunction and microstructural degradation involved in Parkinson's disease. Commun Biol 2021; 4:1162. [PMID: 34621005 PMCID: PMC8497575 DOI: 10.1038/s42003-021-02705-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 09/22/2021] [Indexed: 01/10/2023] Open
Abstract
Dopamine depletion and microstructural degradation underlie the neurodegenerative processes in Parkinson’s disease (PD). To explore early alterations and underlying associations of dopamine and microstructure in PD patients utilizing the hybrid positron emission tomography (PET)-magnetic resonance imaging (MRI). Twenty-five PD patients in early stages and twenty-four matched healthy controls underwent hybrid 18F-fluorodopa (DOPA) PET-diffusion tensor imaging (DTI) scanning. The striatal standardized uptake value ratio (SUVR), DTI maps (fractional anisotropy, FA; mean diffusivity, MD) in subcortical grey matter, and deterministic tractography of the nigrostriatal pathway were processed. Values in more affected (MA) side, less affected (LA) side and mean were analysed. Correlations and mediations among PET, DTI and clinical characteristics were further analysed. PD groups exhibited asymmetric pattern of dopaminergic dysfunction in putamen, impaired integrity in the microstructures (nigral FA, putaminal MD, and FA of nigrostriatal projection). On MA side, significant associations between DTI metrics (nigral FA, putaminal MD, and FA of nigrostriatal projection) and motor performance were significantly mediated by putaminal SUVR, respectively. Early asymmetric disruptions in putaminal dopamine concentrations and nigrostriatal pathway microstructure were detected using hybrid PET-MRI. The findings further implied that molecular degeneration mediates the modulation of microstructural disorganization on motor dysfunction in the early stages of PD. To explore early alterations and underlying associations of dopamine levels and microstructure in Parkinson’s Disease (PD), Shang et al use a hybrid positron emission tomography (PET)-magnetic resonance imaging (MRI) approach in early stage patients and age-matched controls. Their data implies that molecular degeneration mediates the effects of microstructural disorganization on motor dysfunction in the early stages of PD.
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17
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Shokri-Kojori E, Bennett IJ, Tomeldan ZA, Krawczyk DC, Rypma B. Estimates of brain age for gray matter and white matter in younger and older adults: Insights into human intelligence. Brain Res 2021; 1763:147431. [PMID: 33737067 PMCID: PMC8428193 DOI: 10.1016/j.brainres.2021.147431] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 02/01/2021] [Accepted: 03/10/2021] [Indexed: 12/18/2022]
Abstract
Aging entails a multifaceted complex of changes in macro- and micro-structural properties of human brain gray matter (GM) and white matter (WM) tissues, as well as in intellectual abilities. To better capture tissue-specific brain aging, we combined volume and distribution properties of diffusivity indices to derive subject-specific age scores for each tissue. We compared age-related variance between younger and older adults for GM and WM age scores, and tested whether tissue-specific age scores could explain different effects of aging on fluid (Gf) and crystalized (Gc) intelligence in younger and older adults. Chronological age was strongly associated with GM (R2 = 0.73) and WM (R2 = 0.57) age scores. The GM age score accounted for significantly more variance in chronological age in younger relative to older adults (p < 0.001), whereas the WM age score accounted for significantly more variance in chronological age in older compared to younger adults (p < 0.025). Consistent with existing literature, younger adults outperformed older adults in Gf while older adults outperformed younger adults in Gc. The GM age score was negatively associated with Gf in younger adults (p < 0.02), whereas the WM age score was negatively associated with Gc in older adults (p < 0.02). Our results provide evidence for differences in the effects of age on GM and WM in younger versus older adults that may contribute to age-related differences in Gf and Gc.
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Affiliation(s)
- Ehsan Shokri-Kojori
- Center for BrainHealth®, School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, TX, USA.
| | - Ilana J Bennett
- Center for BrainHealth®, School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, TX, USA; Department of Psychology, University of California, Riverside, Riverside, CA, USA
| | - Zuri A Tomeldan
- Center for BrainHealth®, School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, TX, USA
| | - Daniel C Krawczyk
- Center for BrainHealth®, School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, TX, USA; Department of Psychiatry, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
| | - Bart Rypma
- Center for BrainHealth®, School of Behavioral and Brain Sciences, The University of Texas at Dallas, Dallas, TX, USA; Department of Psychiatry, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
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18
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Liu T, Yan Y, Ai J, Chen D, Wu J, Fang B, Yan T. Disrupted rich-club organization of brain structural networks in Parkinson's disease. Brain Struct Funct 2021; 226:2205-2217. [PMID: 34173868 DOI: 10.1007/s00429-021-02319-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 06/08/2021] [Indexed: 12/16/2022]
Abstract
Parkinson's disease (PD) can be considered as the dysfunction in segregation and integration of large-scale structural networks in the late stage of disease progression. However, the altered patterns in the early stage have not been extensively investigated, especially the altered structural rich-club patterns, which is proved powerful to detect the altered patterns of structural networks in Alzheimer's disease and schizophrenia. To this end, we investigated the rich-club organization of the structural networks derived from diffusion tensor imaging (DTI) data in the early stage of PD, and further investigated the relationship between rich-club organization and clinicopathological measures, including motor and non-motor scales and cerebrospinal fluid (CSF) biomarkers. Two datasets were included for validation in this study. The first one included 41 healthy controls (HC) and 64 PD patients from Parkinson's Disease Progression Marker Initiative (PPMI) dataset, and the second one included 24 HC and 26 PD patients. Results revealed that PD patients in early stage had disrupted rich-club organization, with abnormal connectivity strength between peripheral regions (two-sample t-test between PD and HC: p < 0.001), whereas connectivity strength between rich-club regions remained relatively stable (two-sample t-test between PD and HC: p = 0.108). The classification accuracies on three types of connections were 59.93%, 73.96% and 77.44% for rich-club, feeder and local connections. Furthermore, abnormal local and feeder connections showed significant correlation with poor clinical scales and CSF biomarkers. In summary, a selective disruption of non-rich-club connections here could be regarded as a potential marker in the early diagnosis of PD.
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Affiliation(s)
- Tiantian Liu
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Yan Yan
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Jing Ai
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Duanduan Chen
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Jinglong Wu
- Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan.,Beijing Advanced Innovation Center for Intelligent Robots and Systems, Beijing Institute of Technology, Beijing, China
| | - Boyan Fang
- Beijing Rehabilitation Hospital Capital Medical University, Beijing, China.
| | - Tianyi Yan
- School of Life Science, Beijing Institute of Technology, Beijing, China.
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19
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ZHUANG HAN, LIU XUELING, WANG HUI, QIN CHUNLI, LI YUXIN, LI WENSHENG, SHI YONGHONG. DIAGNOSIS OF EARLY STAGE PARKINSON’S DISEASE ON QUANTITATIVE SUSCEPTIBILITY MAPPING USING COMPLEX NETWORK WITH ONE-WAY ANOVA F-TEST FEATURE SELECTION. J MECH MED BIOL 2021. [DOI: 10.1142/s0219519421400261] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This paper presented a novel complex network with one-way ANOVA F-test feature selection to diagnose early-stage Parkinson’s disease (PD) on quantitative susceptibility mapping (QSM). Experimental results on QSM images of 30 early-stage PD patients and 27 healthy controls (HC) proved that the F-test feature selection scheme was effective and achieved good classification results. The accuracy, AUC, sensitivity and specificity of our method were 0.96, 0.97, 0.99 and 0.95, respectively, which were improved by 15%, 4%, 29% and 2%, respectively by comparison with the commonly used region of interest (ROI) based method. Meanwhile, according to the feature importance, the potential brain regions affected by PD were arranged orderly. The affected regions were distributed as follows: 61% of them are located in right hemisphere and 39% in the left hemisphere. Particularly, frontal lobe, parietal lobe, temporal lobe and occipital lobe accounted for 24%, 20%, 5% and 14%, respectively, and striatum and the dorsal thalamus accounted for 16%. It concludes that the complex network with one-way ANOVA F-test feature selection can greatly improve the diagnostic performance of early-stage PD based on QSM, as well as provide a new way to study the effect of PD on brain in the future.
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Affiliation(s)
- HAN ZHUANG
- Digital Medical Research Center, School of Basic Medicine Sciences, Fudan University, Shanghai 200032, P. R. China
| | - XUELING LIU
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai 200040, P. R. China
| | - HUI WANG
- Digital Medical Research Center, School of Basic Medicine Sciences, Fudan University, Shanghai 200032, P. R. China
| | - CHUNLI QIN
- Digital Medical Research Center, School of Basic Medicine Sciences, Fudan University, Shanghai 200032, P. R. China
| | - YUXIN LI
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai 200040, P. R. China
| | - WENSHENG LI
- Department of Anatomy, Histology and Embryology, School of Basic Medicine Sciences, Fudan University, Shanghai 200032, P. R. China
| | - YONGHONG SHI
- Digital Medical Research Center, Shanghai Key Laboratory of Medical Image Computing and Computer Assisted Intervention School of Basic Medicine Sciences, Fudan University, Shanghai 200032, China
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20
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Abstract
Wilson's disease patients with neurological symptoms have motor symptoms and cognitive deficits, including frontal executive, visuospatial processing, and memory impairments. Although the brain structural abnormalities associated with Wilson's disease have been documented, it remains largely unknown how Wilson's disease affects large-scale functional brain networks. In this study, we investigated functional brain networks in Wilson's disease. Particularly, we analyzed resting state functional magnetic resonance images of 30 Wilson's disease patients and 26 healthy controls. First, functional brain networks for each participant were extracted using an independent component analysis method. Then, a computationally efficient pattern classification method was developed to identify discriminative brain functional networks associated with Wilson's disease. Experimental results indicated that Wilson's disease patients, compared with healthy controls, had altered large-scale functional brain networks, including the dorsal anterior cingulate cortex and basal ganglia network, the middle frontal gyrus, the dorsal striatum, the inferior parietal lobule, the precuneus, the temporal pole, and the posterior lobe of cerebellum. Classification models built upon these networks distinguished between neurological WD patients and HCs with accuracy up to 86.9% (specificity: 86.7%, sensitivity: 89.7%). The classification scores were correlated with the United Wilson's Disease Rating Scale measures and durations of disease of the patients. These results suggest that Wilson's disease patients have multiple aberrant brain functional networks, and classification scores derived from these networks are associated with severity of clinical symptoms.
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21
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Wei X, Luo C, Li Q, Hu N, Xiao Y, Liu N, Lui S, Gong Q. White Matter Abnormalities in Patients With Parkinson's Disease: A Meta-Analysis of Diffusion Tensor Imaging Using Tract-Based Spatial Statistics. Front Aging Neurosci 2021; 12:610962. [PMID: 33584244 PMCID: PMC7876070 DOI: 10.3389/fnagi.2020.610962] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 12/28/2020] [Indexed: 02/05/2023] Open
Abstract
Background: Tract-based spatial statistics (TBSS) studies based on diffusion tensor imaging (DTI) have revealed extensive abnormalities in white matter (WM) fibers of Parkinson's disease (PD); however, the results were inconsistent. Therefore, a meta-analytical approach was used in this study to find the most prominent and replicable WM abnormalities of PD. Methods: Online databases were systematically searched for all TBSS studies comparing fractional anisotropy (FA) between patients with PD and controls. Subsequently, we performed the meta-analysis using a coordinate-based meta-analytic software called seed-based d mapping. Meanwhile, meta-regression was performed to explore the potential correlation between the alteration of FA and the clinical characteristics of PD. Results: Out of a total of 1,701 studies that were identified, 23 studies were included. Thirty datasets, including 915 patients (543 men) with PD and 836 healthy controls (449 men), were included in the current study. FA reduction was identified in the body of the corpus callosum (CC; 245 voxels; z = -1.739; p < 0.001) and the left inferior fronto-occipital fasciculus (IFOF) 118 voxels; z = -1.182; p < 0.001). Both CC and IFOF maintained significance in the sensitivity analysis. No increase in FA was identified, but the percentage of male patients with PD was positively associated with the value of FA in the body of the CC. Conclusions: Although some limitations exist, DTI is regarded as a valid way to identify the pathophysiology of PD. It could be more beneficial to integrate DTI parameters with other MRI techniques to explore brain degeneration in PD.
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Affiliation(s)
- Xia Wei
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Huaxi MR Research Center (HMRRC), West China Hospital, Sichuan University, Chengdu, China.,Psychoradiology Research Unit of the Chinese Academy of Medical Sciences (2018RU011), West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Chunyan Luo
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Huaxi MR Research Center (HMRRC), West China Hospital, Sichuan University, Chengdu, China.,Psychoradiology Research Unit of the Chinese Academy of Medical Sciences (2018RU011), West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Qian Li
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Huaxi MR Research Center (HMRRC), West China Hospital, Sichuan University, Chengdu, China.,Psychoradiology Research Unit of the Chinese Academy of Medical Sciences (2018RU011), West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Na Hu
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Huaxi MR Research Center (HMRRC), West China Hospital, Sichuan University, Chengdu, China.,Psychoradiology Research Unit of the Chinese Academy of Medical Sciences (2018RU011), West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Yuan Xiao
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Huaxi MR Research Center (HMRRC), West China Hospital, Sichuan University, Chengdu, China.,Psychoradiology Research Unit of the Chinese Academy of Medical Sciences (2018RU011), West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Nian Liu
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Huaxi MR Research Center (HMRRC), West China Hospital, Sichuan University, Chengdu, China.,Psychoradiology Research Unit of the Chinese Academy of Medical Sciences (2018RU011), West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Su Lui
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Huaxi MR Research Center (HMRRC), West China Hospital, Sichuan University, Chengdu, China.,Psychoradiology Research Unit of the Chinese Academy of Medical Sciences (2018RU011), West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Qiyong Gong
- Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Huaxi MR Research Center (HMRRC), West China Hospital, Sichuan University, Chengdu, China.,Psychoradiology Research Unit of the Chinese Academy of Medical Sciences (2018RU011), West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
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22
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Chandio BQ, Risacher SL, Pestilli F, Bullock D, Yeh FC, Koudoro S, Rokem A, Harezlak J, Garyfallidis E. Bundle analytics, a computational framework for investigating the shapes and profiles of brain pathways across populations. Sci Rep 2020; 10:17149. [PMID: 33051471 PMCID: PMC7555507 DOI: 10.1038/s41598-020-74054-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 09/22/2020] [Indexed: 11/08/2022] Open
Abstract
Tractography has created new horizons for researchers to study brain connectivity in vivo. However, tractography is an advanced and challenging method that has not been used so far for medical data analysis at a large scale in comparison to other traditional brain imaging methods. This work allows tractography to be used for large scale and high-quality medical analytics. BUndle ANalytics (BUAN) is a fast, robust, and flexible computational framework for real-world tractometric studies. BUAN combines tractography and anatomical information to analyze the challenging datasets and identifies significant group differences in specific locations of the white matter bundles. Additionally, BUAN takes the shape of the bundles into consideration for the analysis. BUAN compares the shapes of the bundles using a metric called bundle adjacency which calculates shape similarity between two given bundles. BUAN builds networks of bundle shape similarities that can be paramount for automating quality control. BUAN is freely available in DIPY. Results are presented using publicly available Parkinson's Progression Markers Initiative data.
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Affiliation(s)
- Bramsh Qamar Chandio
- Department of Intelligent Systems Engineering, Luddy School of Informatics, Computing and Engineering, Indiana University Bloomington, Bloomington, IN, USA.
| | | | - Franco Pestilli
- Department of Psychology, The University of Texas, Austin, TX, USA
| | - Daniel Bullock
- Department of Psychological and Brain Sciences, Indiana University Bloomington, Bloomington, IN, USA
| | - Fang-Cheng Yeh
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Serge Koudoro
- Department of Intelligent Systems Engineering, Luddy School of Informatics, Computing and Engineering, Indiana University Bloomington, Bloomington, IN, USA
| | - Ariel Rokem
- Department of Psychology and eScience Institute, University of Washington, Washington, DC, USA
| | - Jaroslaw Harezlak
- School of Public Health, Indiana University Bloomington, Bloomington, IN, USA
| | - Eleftherios Garyfallidis
- Department of Intelligent Systems Engineering, Luddy School of Informatics, Computing and Engineering, Indiana University Bloomington, Bloomington, IN, USA
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23
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Zhang Y, Burock MA. Diffusion Tensor Imaging in Parkinson's Disease and Parkinsonian Syndrome: A Systematic Review. Front Neurol 2020; 11:531993. [PMID: 33101169 PMCID: PMC7546271 DOI: 10.3389/fneur.2020.531993] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 08/18/2020] [Indexed: 12/21/2022] Open
Abstract
Diffusion tensor imaging (DTI) allows measuring fractional anisotropy and similar microstructural indices of the brain white matter. Lower than normal fractional anisotropy as well as higher than normal diffusivity is associated with loss of microstructural integrity and neurodegeneration. Previous DTI studies in Parkinson's disease (PD) have demonstrated abnormal fractional anisotropy in multiple white matter regions, particularly in the dopaminergic nuclei and dopaminergic pathways. However, DTI is not considered a diagnostic marker for the earliest Parkinson's disease since anisotropic alterations present a temporally divergent pattern during the earliest Parkinson's course. This article reviews a majority of clinically employed DTI studies in PD, and it aims to prove the utilities of DTI as a marker of diagnosing PD, correlating clinical symptomatology, tracking disease progression, and treatment effects. To address the challenge of DTI being a diagnostic marker for early PD, this article also provides a comparison of the results from a longitudinal, early stage, multicenter clinical cohort of Parkinson's research with previous publications. This review provides evidences of DTI as a promising marker for monitoring PD progression and classifying atypical PD types, and it also interprets the possible pathophysiologic processes under the complex pattern of fractional anisotropic changes in the first few years of PD. Recent technical advantages, limitations, and further research strategies of clinical DTI in PD are additionally discussed.
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Affiliation(s)
- Yu Zhang
- Department of Psychiatry, War Related Illness and Injury Study Center, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, United States
| | - Marc A Burock
- Department of Psychiatry, Mainline Health, Bryn Mawr Hospital, Bryn Mawr, PA, United States
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24
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Benear SL, Ngo CT, Olson IR. Dissecting the Fornix in Basic Memory Processes and Neuropsychiatric Disease: A Review. Brain Connect 2020; 10:331-354. [PMID: 32567331 DOI: 10.1089/brain.2020.0749] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Background: The fornix is the primary axonal tract of the hippocampus, connecting it to modulatory subcortical structures. This review reveals that fornix damage causes cognitive deficits that closely mirror those resulting from hippocampal lesions. Methods: We reviewed the literature on the fornix, spanning non-human animal lesion research, clinical case studies of human patients with fornix damage, as well as diffusion-weighted imaging (DWI) work that evaluates fornix microstructure in vivo. Results: The fornix is essential for memory formation because it serves as the conduit for theta rhythms and acetylcholine, as well as providing mnemonic representations to deep brain structures that guide motivated behavior, such as when and where to eat. In rodents and non-human primates, fornix lesions lead to deficits in conditioning, reversal learning, and navigation. In humans, damage to the fornix manifests as anterograde amnesia. DWI research reveals that the fornix plays a key role in mild cognitive impairment and Alzheimer's Disease, and can potentially predict conversion from the former to the latter. Emerging DWI findings link perturbations in this structure to schizophrenia, mood disorders, and eating disorders. Cutting-edge research has investigated how deep brain stimulation of the fornix can potentially attenuate memory loss, control epileptic seizures, and even improve mood. Conclusions: The fornix is essential to a fully functioning memory system and is implicated in nearly all neurological functions that rely on the hippocampus. Future research needs to use optimized DWI methods to study the fornix in vivo, which we discuss, given the difficult nature of fornix reconstruction. Impact Statement The fornix is a white matter tract that connects the hippocampus to several subcortical brain regions and is pivotal for episodic memory functioning. Functionally, the fornix transmits essential neurotransmitters, as well as theta rhythms, to the hippocampus. In addition, it is the conduit by which memories guide decisions. The fornix is biomedically important because lesions to this tract result in irreversible anterograde amnesia. Research using in vivo imaging methods has linked fornix pathology to cognitive aging, mild cognitive impairment, psychosis, epilepsy, and, importantly, Alzheimer's Disease.
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Affiliation(s)
- Susan L Benear
- Department of Psychology, Temple University, Philadelphia, Pennsylvania, USA
| | - Chi T Ngo
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany
| | - Ingrid R Olson
- Department of Psychology, Temple University, Philadelphia, Pennsylvania, USA
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25
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Guo T, Guan X, Zhou C, Gao T, Wu J, Song Z, Xuan M, Gu Q, Huang P, Pu J, Zhang B, Cui F, Xia S, Xu X, Zhang M. Clinically relevant connectivity features define three subtypes of Parkinson's disease patients. Hum Brain Mapp 2020; 41:4077-4092. [PMID: 32588952 PMCID: PMC7469787 DOI: 10.1002/hbm.25110] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 05/23/2020] [Accepted: 06/14/2020] [Indexed: 12/23/2022] Open
Abstract
Parkinson's disease (PD) is characterized by complex clinical symptoms, including classic motor and nonmotor disturbances. Patients with PD vary in clinical manifestations and prognosis, which point to the existence of subtypes. This study aimed to find the fiber connectivity correlations with several crucial clinical symptoms and identify PD subtypes using unsupervised clustering analysis. One hundred and thirty-four PD patients and 77 normal controls were enrolled. Canonical correlation analysis (CCA) was performed to define the clinically relevant connectivity features, which were then used in the hierarchical clustering analysis to identify the distinct subtypes of PD patients. Multimodal neuroimaging analyses were further used to explore the neurophysiological basis of these subtypes. The methodology was validated in an independent data set. CCA revealed two significant clinically relevant patterns (motor-related pattern and depression-related pattern; r = .94, p < .001 and r = .926, p = .001, respectively) among PD patients, and hierarchical clustering analysis identified three neurophysiological subtypes ("mild" subtype, "severe depression-dominant" subtype and "severe motor-dominant" subtype). Multimodal neuroimaging analyses suggested that the patients in the "severe depression-dominant" subtype exhibited widespread disruptions both in function and structure, while the other two subtypes exhibited relatively mild abnormalities in brain function. In the independent validation, three similar subtypes were identified. In conclusion, we revealed heterogeneous subtypes of PD patients according to their distinct clinically relevant connectivity features. Importantly, depression symptoms have a considerable impact on brain damage in patients with PD.
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Affiliation(s)
- Tao Guo
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaojun Guan
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Cheng Zhou
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ting Gao
- Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jingjing Wu
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhe Song
- Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Min Xuan
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Quanquan Gu
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Peiyu Huang
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiali Pu
- Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Baorong Zhang
- Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Feng Cui
- Department of Radiology, Hangzhou Hospital of Traditional Chinese Medicine, Hangzhou, China
| | - Shunren Xia
- Key Laboratory of Biomedical Engineering of Ministry of Education, Zhejiang University, Hangzhou, China
| | - Xiaojun Xu
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Minming Zhang
- Department of Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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26
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Di Tella S, Baglio F, Pelizzari L, Cabinio M, Nemni R, Traficante D, Silveri MC. Uncinate fasciculus and word selection processing in Parkinson's disease. Neuropsychologia 2020; 146:107504. [PMID: 32485199 DOI: 10.1016/j.neuropsychologia.2020.107504] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 05/25/2020] [Accepted: 05/26/2020] [Indexed: 01/13/2023]
Abstract
We explored with Diffusion Tensor Imaging (DTI) technique whether the ability to select words among competitive alternatives during word production is related to the integrity of the left uncinate fasciculus (UF) in Parkinson's disease (PD). Nineteen PD patients (10 right-sided and 9 left-sided) and 17 matched healthy controls (HC) took part in the study. Participants were asked to derive nouns from verbs (reading from to read) or to generate verbs from nouns (to build from building). Noun and verb production, in this task, differ in the number of lexical entries among which the response is selected, as the noun must be selected from a larger number of alternatives compared to the verb, and thus is more demanding of processing resources. DTI evaluation was obtained for each subject. Fractional anisotropy (FA) and mean diffusivity (MD) maps were derived from DTI and median FA and MD values were computed within the left and right UF. Then, FA and MD of the left and right UF were correlated with noun and verb production. Both the left and right UF-FA correlated with the global (noun + verb) production and noun production in the whole PD group. In right-sided PD, correlations were found with the contralateral UF-FA; in left-sided PD the correlations emerged with both the left and right UF-FA. The most difficult task, noun production, significantly correlated with the right UF-FA in left-sided PD. The left UF is involved in word selection processes, and the right UF intervenes when the selection is particularly demanding of attentional resources.
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Affiliation(s)
- Sonia Di Tella
- IRCCS Fondazione Don Carlo Gnocchi, Via A. Capecelatro, 66, 20148, Milan, Italy.
| | - Francesca Baglio
- IRCCS Fondazione Don Carlo Gnocchi, Via A. Capecelatro, 66, 20148, Milan, Italy
| | - Laura Pelizzari
- IRCCS Fondazione Don Carlo Gnocchi, Via A. Capecelatro, 66, 20148, Milan, Italy
| | - Monia Cabinio
- IRCCS Fondazione Don Carlo Gnocchi, Via A. Capecelatro, 66, 20148, Milan, Italy
| | - Raffaello Nemni
- IRCCS Fondazione Don Carlo Gnocchi, Via A. Capecelatro, 66, 20148, Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Via F. Sforza 35, 20122, Milan, Italy
| | - Daniela Traficante
- Department of Psychology, Catholic University, Largo A. Gemelli, 1, 20123, Milan, Italy
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27
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Altered white matter microarchitecture in Parkinson's disease: a voxel-based meta-analysis of diffusion tensor imaging studies. Front Med 2020; 15:125-138. [PMID: 32458190 DOI: 10.1007/s11684-019-0725-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 10/12/2019] [Indexed: 02/05/2023]
Abstract
This study aimed to define the most consistent white matter microarchitecture pattern in Parkinson's disease (PD) reflected by fractional anisotropy (FA), addressing clinical profiles and methodology-related heterogeneity. Web-based publication databases were searched to conduct a meta-analysis of whole-brain diffusion tensor imaging studies comparing PD with healthy controls (HC) using the anisotropic effect size-signed differential mapping. A total of 808 patients with PD and 760 HC coming from 27 databases were finally included. Subgroup analyses were conducted considering heterogeneity with respect to medication status, disease stage, analysis methods, and the number of diffusion directions in acquisition. Compared with HC, patients with PD had decreased FA in the left middle cerebellar peduncle, corpus callosum (CC), left inferior fronto-occipital fasciculus, and right inferior longitudinal fasciculus. Most of the main results remained unchanged in subgroup meta-analyses of medicated patients, early stage patients, voxel-based analysis, and acquisition with 30 diffusion directions. The subgroup meta-analysis of medication-free patients showed FA decrease in the right olfactory cortex. The cerebellum and CC, associated with typical motor impairment, showed the most consistent FA decreases in PD. Medication status, analysis approaches, and the number of diffusion directions have an important impact on the findings, needing careful evaluation in future meta-analyses.
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28
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Liu P, Wang H, Zheng S, Zhang F, Zhang X. Parkinson's Disease Diagnosis Using Neostriatum Radiomic Features Based on T2-Weighted Magnetic Resonance Imaging. Front Neurol 2020; 11:248. [PMID: 32322236 PMCID: PMC7156586 DOI: 10.3389/fneur.2020.00248] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 03/13/2020] [Indexed: 12/12/2022] Open
Abstract
Background: Parkinson's disease (PD) is a neurodegenerative disease in which the neostriatum, including the caudate nucleus (CN) and putamen (PU), has an important role in the pathophysiology. However, conventional magnetic resonance imaging (MRI) lacks sufficient specificity to diagnose PD. Therefore, the study's aim was to investigate the feasibility of using a radiomics approach to distinguish PD patients from healthy controls on T2-weighted images of the neostriatum and provide a basis for the clinical diagnosis of PD. Methods: T2-weighted images from 69 PD patients and 69 age- and sex-matched healthy controls were obtained on the same 3.0T MRI scanner. Regions of interest (ROIs) were manually placed at the CN and PU on the slices showing the largest respective sizes of the CN and PU. We extracted 274 texture features from each ROI and then used the least absolute shrinkage and selection operator regression to perform feature selection and radiomics signature building to identify the CN and PU radiomics signatures consisting of optimal features. We used a receiver operating characteristic curve analysis to assess the diagnostic performance of two radiomics signatures in a training group and estimate the generalization performance in the test group. Results: There were no significant differences in the demographic and clinical characteristics between the PD patients and healthy controls. The CN and PU radiomics signatures were built using 12 and 7 optimal features, respectively. The performance of the two radiomics signatures to distinguish PD patients from healthy controls was good. In the training and test groups, the AUCs of the CN radiomics signatures were 0.9410 (95% confidence interval [CI]: 0.8986–0.9833) and 0.7732 (95% CI: 0.6292–0.9173), respectively, and the AUCs of the PU radiomics signature were 0.8767 (95% CI: 0.8066–0.9469) and 0.7143 (95% CI: 0.5540–0.8746), respectively. Vertl_GlevNonU_R appeared simultaneously in both the CN and PU radiomics signatures as an optimal feature. A t-test analysis revealed significantly higher levels of texture values of the CN and PU in the PD patients than healthy controls (P < 0.05). Conclusion: Neostriatum radiomics signatures achieved good diagnostic performance for PD and potentially could serve as a basis for the clinical diagnosis of PD.
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Affiliation(s)
- Panshi Liu
- Department of Radiology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Han Wang
- Medical Imaging Center, Taian Central Hospital, Taian, China
| | - Shilei Zheng
- Department of Radiology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Fan Zhang
- Department of Neurology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Xianglin Zhang
- Department of Radiology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
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29
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Chen F, Wu T, Luo Y, Li Z, Guan Q, Meng X, Tao W, Zhang H. Amnestic mild cognitive impairment in Parkinson's disease: White matter structural changes and mechanisms. PLoS One 2019; 14:e0226175. [PMID: 31830080 PMCID: PMC6907797 DOI: 10.1371/journal.pone.0226175] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 11/21/2019] [Indexed: 12/11/2022] Open
Abstract
Mild cognitive impairment (MCI) is a heterogeneous cognitive disorder that is often comorbid with Parkinson's diseases (PD). The amnestic subtype of PD-MCI (PD-aMCI) has a higher risk to develop dementia. However, there is a lack of studies on the white matter (WM) structural changes of PD-aMCI. We characterized the WM structural changes of PD-aMCI (n = 17) with cognitively normal PD (PD-CN, n = 19) and normal controls (n = 20), using voxel-based and tract-based spatial statistics (TBSS) analyses on fractional anisotropy (FA) axial diffusivity (AD), and radial diffusivity (RD). By excluding and then including the motor performance as a covariate in the comparison analysis between PD-aMCI and PD-CN, we attempted to discern the influences of two neuropathological mechanisms on the WM structural changes of PD-aMCI. The correlation analyses between memory and voxel-based WM measures in all PD patients were also performed (n = 36). The results showed that PD-aMCI had smaller FA values than PD-CN in the diffuse WM areas, and PD-CN had higher AD and RD values than normal controls in the right caudate. Most FA difference between PD-aMCI and PD-CN could be weakened by the motor adjustment. The FA differences between PD-aMCI and PD-CN were largely spatially overlapped with the memory-correlated FA values. Our findings demonstrated that the WM structural differences between PD-aMCI and PD-CN were mainly memory-related, and the influence of motor adjustment might indicate a common mechanism underlying both motor and memory impairment in PD-aMCI, possibly reflecting a predominant influence of dopaminergic neuropathology.
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Affiliation(s)
- Fuyong Chen
- Department of Neurosurgery, Shenzhen University General Hospital, Shenzhen University, Shenzhen, Guangdong Province, China
- Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, Guangdong Province, China
- Department of Neurosurgery, the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, China
| | - Tao Wu
- Department of Neurology, National Clinical Research Center for Geriatric Disorders, Beijing Institute of Geriatrics, Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory on Parkinson's Disease, Parkinson Disease Center of Beijing Institute for Brain Disorders, Beijing, China
| | - Yuejia Luo
- School of Psychology, Shenzhen University, Shenzhen, Guangdong Province, China
- Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen, Guangdong Province, China
| | - Zhihao Li
- School of Psychology, Shenzhen University, Shenzhen, Guangdong Province, China
- Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen, Guangdong Province, China
| | - Qing Guan
- School of Psychology, Shenzhen University, Shenzhen, Guangdong Province, China
- Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen, Guangdong Province, China
| | - Xianghong Meng
- Department of Neurosurgery, Shenzhen University General Hospital, Shenzhen University, Shenzhen, Guangdong Province, China
- Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, Guangdong Province, China
| | - Wei Tao
- Department of Neurosurgery, Shenzhen University General Hospital, Shenzhen University, Shenzhen, Guangdong Province, China
- Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, Guangdong Province, China
| | - Haobo Zhang
- School of Psychology, Shenzhen University, Shenzhen, Guangdong Province, China
- Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen, Guangdong Province, China
- Center for Emotion and Brain, Shenzhen Institute of Neuroscience, Shenzhen, Guangdong Province, China
- * E-mail:
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30
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Isaacs BR, Trutti AC, Pelzer E, Tittgemeyer M, Temel Y, Forstmann BU, Keuken MC. Cortico-basal white matter alterations occurring in Parkinson's disease. PLoS One 2019; 14:e0214343. [PMID: 31425517 PMCID: PMC6699705 DOI: 10.1371/journal.pone.0214343] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 07/17/2019] [Indexed: 01/01/2023] Open
Abstract
Magnetic resonance imaging studies typically use standard anatomical atlases for identification and analyses of (patho-)physiological effects on specific brain areas; these atlases often fail to incorporate neuroanatomical alterations that may occur with both age and disease. The present study utilizes Parkinson's disease and age-specific anatomical atlases of the subthalamic nucleus for diffusion tractography, assessing tracts that run between the subthalamic nucleus and a-priori defined cortical areas known to be affected by Parkinson's disease. The results show that the strength of white matter fiber tracts appear to remain structurally unaffected by disease. Contrary to that, Fractional Anisotropy values were shown to decrease in Parkinson's disease patients for connections between the subthalamic nucleus and the pars opercularis of the inferior frontal gyrus, anterior cingulate cortex, the dorsolateral prefrontal cortex and the pre-supplementary motor, collectively involved in preparatory motor control, decision making and task monitoring. While the biological underpinnings of fractional anisotropy alterations remain elusive, they may nonetheless be used as an index of Parkinson's disease. Moreover, we find that failing to account for structural changes occurring in the subthalamic nucleus with age and disease reduce the accuracy and influence the results of tractography, highlighting the importance of using appropriate atlases for tractography.
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Affiliation(s)
- Bethany. R. Isaacs
- Integrative Model-based Cognitive Neuroscience research unit, University of Amsterdam, Amsterdam, the Netherlands
- Department of Neurosurgery, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Anne. C. Trutti
- Integrative Model-based Cognitive Neuroscience research unit, University of Amsterdam, Amsterdam, the Netherlands
- Cognitive Psychology, University of Leiden, Leiden, the Netherlands
| | - Esther Pelzer
- Translational Neurocircuitry, Max Planck Institute for Metabolism Research, Cologne, Germany
- Department of Neurology, University Clinics, Cologne, Germany
| | - Marc Tittgemeyer
- Translational Neurocircuitry, Max Planck Institute for Metabolism Research, Cologne, Germany
- Department of Neurology, University Clinics, Cologne, Germany
| | - Yasin Temel
- Department of Neurosurgery, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Birte. U. Forstmann
- Integrative Model-based Cognitive Neuroscience research unit, University of Amsterdam, Amsterdam, the Netherlands
| | - Max. C. Keuken
- Integrative Model-based Cognitive Neuroscience research unit, University of Amsterdam, Amsterdam, the Netherlands
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31
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Lorio S, Sambataro F, Bertolino A, Draganski B, Dukart J. The Combination of DAT-SPECT, Structural and Diffusion MRI Predicts Clinical Progression in Parkinson's Disease. Front Aging Neurosci 2019; 11:57. [PMID: 30930768 PMCID: PMC6428714 DOI: 10.3389/fnagi.2019.00057] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 02/26/2019] [Indexed: 12/13/2022] Open
Abstract
There is an increasing interest in identifying non-invasive biomarkers of disease severity and prognosis in idiopathic Parkinson’s disease (PD). Dopamine-transporter SPECT (DAT-SPECT), diffusion tensor imaging (DTI), and structural magnetic resonance imaging (sMRI) provide unique information about the brain’s neurotransmitter and microstructural properties. In this study, we evaluate the relative and combined capability of these imaging modalities to predict symptom severity and clinical progression in de novo PD patients. To this end, we used MRI, SPECT, and clinical data of de novo drug-naïve PD patients (n = 205, mean age 61 ± 10) and age-, sex-matched healthy controls (n = 105, mean age 58 ± 12) acquired at baseline. Moreover, we employed clinical data acquired at 1 year follow-up for PD patients with or without L-Dopa treatment in order to predict the progression symptoms severity. Voxel-based group comparisons and covariance analyses were applied to characterize baseline disease-related alterations for DAT-SPECT, DTI, and sMRI. Cortical and subcortical alterations in de novo PD patients were found in all evaluated imaging modalities, in line with previously reported midbrain-striato-cortical network alterations. The combination of these imaging alterations was reliably linked to clinical severity and disease progression at 1 year follow-up in this patient population, providing evidence for the potential use of these modalities as imaging biomarkers for disease severity and prognosis that can be integrated into clinical trials.
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Affiliation(s)
- Sara Lorio
- Developmental Neurosciences, UCL Great Ormond Street Institute of Child Health, University College London, London, United Kingdom.,Roche Pharma and Early Development, Neuroscience, Ophthalmology and Rare Diseases, F. Hoffmann-La Roche Ltd., Basel, Switzerland.,Laboratory for Research in Neuroimaging, Department of Clinical Neurosciences, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - Fabio Sambataro
- Roche Pharma and Early Development, Neuroscience, Ophthalmology and Rare Diseases, F. Hoffmann-La Roche Ltd., Basel, Switzerland.,Department of Experimental and Clinical Medical Sciences, University of Udine, Udine, Italy
| | - Alessandro Bertolino
- Roche Pharma and Early Development, Neuroscience, Ophthalmology and Rare Diseases, F. Hoffmann-La Roche Ltd., Basel, Switzerland.,Department of Basic Medical Science, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - Bogdan Draganski
- Laboratory for Research in Neuroimaging, Department of Clinical Neurosciences, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland.,Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
| | - Juergen Dukart
- Roche Pharma and Early Development, Neuroscience, Ophthalmology and Rare Diseases, F. Hoffmann-La Roche Ltd., Basel, Switzerland.,Institute of Neuroscience and Medicine, Brain and Behaviour (INM-7), Research Centre Jülich, Jülich, Germany.,Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
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32
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Jin L, Zeng Q, He J, Feng Y, Zhou S, Wu Y. A ReliefF-SVM-based method for marking dopamine-based disease characteristics: A study on SWEDD and Parkinson’s disease. Behav Brain Res 2019; 356:400-407. [DOI: 10.1016/j.bbr.2018.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 09/05/2018] [Accepted: 09/07/2018] [Indexed: 12/17/2022]
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33
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Hosseini M, Fattahi Z, Abedini SS, Hu H, Ropers H, Kalscheuer VM, Najmabadi H, Kahrizi K. GPR126
: A novel candidate gene implicated in autosomal recessive intellectual disability. Am J Med Genet A 2018; 179:13-19. [DOI: 10.1002/ajmg.a.40531] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 07/29/2018] [Accepted: 08/10/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Masoumeh Hosseini
- Genetics Research CenterUniversity of Social Welfare and Rehabilitation Sciences Tehran Iran
| | - Zohreh Fattahi
- Genetics Research CenterUniversity of Social Welfare and Rehabilitation Sciences Tehran Iran
| | | | - Hao Hu
- Department Human Molecular GeneticsMax‐Planck‐Institute for Molecular Genetics Berlin Germany
| | - Hans‐H. Ropers
- Department Human Molecular GeneticsMax‐Planck‐Institute for Molecular Genetics Berlin Germany
| | - Vera M. Kalscheuer
- Department Human Molecular GeneticsMax‐Planck‐Institute for Molecular Genetics Berlin Germany
| | - Hossein Najmabadi
- Genetics Research CenterUniversity of Social Welfare and Rehabilitation Sciences Tehran Iran
| | - Kimia Kahrizi
- Genetics Research CenterUniversity of Social Welfare and Rehabilitation Sciences Tehran Iran
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34
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Bishop JH, Shpaner M, Kubicki A, Clements S, Watts R, Naylor MR. Structural network differences in chronic muskuloskeletal pain: Beyond fractional anisotropy. Neuroimage 2018; 182:441-455. [DOI: 10.1016/j.neuroimage.2017.12.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 11/29/2017] [Accepted: 12/10/2017] [Indexed: 12/13/2022] Open
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35
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Complex networks reveal early MRI markers of Parkinson’s disease. Med Image Anal 2018; 48:12-24. [DOI: 10.1016/j.media.2018.05.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 05/02/2018] [Accepted: 05/11/2018] [Indexed: 11/21/2022]
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36
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Conforti R, Sardaro A, Negro A, Caiazzo G, Paccone A, De Micco R, Cirillo S, Tessitore A. Dilated Virchow-Robin space and Parkinson's disease: A case report of combined MRI and diffusion tensor imaging. Radiol Case Rep 2018; 13:871-877. [PMID: 29988793 PMCID: PMC6031236 DOI: 10.1016/j.radcr.2018.05.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 05/10/2018] [Accepted: 05/23/2018] [Indexed: 12/03/2022] Open
Abstract
In this manuscript we report the case of a 69-year-old female patient, who suffers from Parkinson's disease (PD) with a dilated Virchow-Robin space (dVRS) on the left anterior perforated substance. During a magnetic resonance imaging examination, the presence of a dVRS was discovered on the left anterior perforated substance. Subsequently, the patient has been subjected to further investigation of magnetic resonance imaging and diffusion tensor imaging (DTI). The DTI data of our PD patient showed increased peak frequency of left fractional anisotropy and decreases in the distribution of Mean Diffusivity(MD) with changes in the fiber density compared to the normal contralateral tract. We hypothesize that the DTI changes are due to dVRS. In the text a review of the recent literature on the presence of dVRSs, located in mono and bilateral seat, in patients with PD is reported, explaining its possible implications on disease progression, cognitive decline, and worsening of symptoms.
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Affiliation(s)
- Renata Conforti
- Università degli Studi della Campania Luigi Vanvitelli, Section of Neuroradiology, viale Colli Aminei 21, Napoli 80131, Italy
| | - Angela Sardaro
- Università degli Studi della Campania Luigi Vanvitelli, piazza Miraglia 2, Napoli 80138, Italy
| | - Alberto Negro
- Università degli Studi della Campania Luigi Vanvitelli, Section of Neuroradiology, viale Colli Aminei 21, Napoli 80131, Italy
| | - Giuseppina Caiazzo
- MRI Research Center SUN-FISM, Università degli Studi della Campania Luigi Vanvitelli, piazza Miraglia 2, Napoli 80138, Italy
| | - Antonella Paccone
- MRI Research Center SUN-FISM, Università degli Studi della Campania Luigi Vanvitelli, piazza Miraglia 2, Napoli 80138, Italy
| | - Rosita De Micco
- Università degli Studi della Campania Luigi Vanvitelli, Dipartimento di Scienze Mediche, Chirurgiche, Neurologiche, Metaboliche e dell'Invecchiamento, piazza Miraglia 2, Napoli 80138, Italy
| | - Sossio Cirillo
- Università degli Studi della Campania Luigi Vanvitelli, Section of Neuroradiology, viale Colli Aminei 21, Napoli 80131, Italy
| | - Alessandro Tessitore
- Università degli Studi della Campania Luigi Vanvitelli, Dipartimento di Scienze Mediche, Chirurgiche, Neurologiche, Metaboliche e dell'Invecchiamento, piazza Miraglia 2, Napoli 80138, Italy
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37
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Haghshomar M, Dolatshahi M, Ghazi Sherbaf F, Sanjari Moghaddam H, Shirin Shandiz M, Aarabi MH. Disruption of Inferior Longitudinal Fasciculus Microstructure in Parkinson's Disease: A Systematic Review of Diffusion Tensor Imaging Studies. Front Neurol 2018; 9:598. [PMID: 30093877 PMCID: PMC6070770 DOI: 10.3389/fneur.2018.00598] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 07/05/2018] [Indexed: 12/19/2022] Open
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder accompanied by a series of pathological mechanisms which contribute to a variety of motor and non-motor symptoms. Recently, there has been an increasing interest in structural diffusion tensor imaging (DTI) in PD which has shed light on our understanding of structural abnormalities underlying PD symptoms or its associations with pathological mechanisms. One of the white matter tracts shown to be disrupted in PD with a possible contribution to some PD symptoms is the inferior longitudinal fasciculus (ILF). On the whole, lower ILF integrity contributes to thought disorders, impaired visual emotions, cognitive impairments such as semantic fluency deficits, and mood disorders. This review outlines the microstructural changes in ILF associated with systemic inflammation and various PD symptoms like cognitive decline, facial emotion recognition deficit, depression, color discrimination deficit, olfactory dysfunction, and tremor genesis. However, few studies have investigated DTI correlates of each symptom and larger studies with standardized imaging protocols are required to extend these preliminary findings and lead to more promising results.
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Affiliation(s)
- Maryam Haghshomar
- Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahsa Dolatshahi
- Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | | | | | - Mehdi Shirin Shandiz
- Department of Medical Physics, Zahedan University of Medical Sciences, Zahedan, Iran
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38
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Pozorski V, Oh JM, Adluru N, Merluzzi AP, Theisen F, Okonkwo O, Barzgari A, Krislov S, Sojkova J, Bendlin BB, Johnson SC, Alexander AL, Gallagher CL. Longitudinal white matter microstructural change in Parkinson's disease. Hum Brain Mapp 2018; 39:4150-4161. [PMID: 29952102 DOI: 10.1002/hbm.24239] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 05/06/2018] [Accepted: 05/22/2018] [Indexed: 01/06/2023] Open
Abstract
Postmortem studies of Parkinson's disease (PD) suggest that Lewy body pathology accumulates in a predictable topographical sequence, beginning in the olfactory bulb, followed by caudal brainstem, substantia nigra, limbic cortex, and neocortex. Diffusion-weighted imaging (DWI) is sensitive, if not specific, to early disease-related white matter (WM) change in a variety of traumatic and degenerative brain diseases. Although numerous cross-sectional studies have reported DWI differences in cerebral WM in PD, only a few longitudinal studies have investigated whether DWI change exceeds that of normal aging or coincides with regional Lewy body accumulation. This study mapped regional differences in the rate of DWI-based microstructural change between 29 PD patients and 43 age-matched controls over 18 months. Iterative within- and between-subject tensor-based registration was completed on motion- and eddy current-corrected DWI images, then baseline versus follow-up difference maps of fractional anisotropy, mean, radial, and axial diffusivity were analyzed in the Biological Parametric Mapping toolbox for MATLAB. This analysis showed that PD patients had a greater decline in WM integrity in the rostral brainstem, caudal subcortical WM, and cerebellar peduncles, compared with controls. In addition, patients with unilateral clinical signs at baseline experienced a greater rate of WM change over the 18-month study than patients with bilateral signs. These findings suggest that rate of WM microstructural change in PD exceeds that of normal aging and is maximal during early stage disease. In addition, the neuroanatomic locations (rostral brainstem and subcortical WM) of accelerated WM change fit with current theories of topographic disease progression.
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Affiliation(s)
- Vincent Pozorski
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Jennifer M Oh
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Nagesh Adluru
- Waisman Laboratory for Brain Imaging and Behavior, Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin
| | - Andrew P Merluzzi
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Frances Theisen
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Ozioma Okonkwo
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Amy Barzgari
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Stephanie Krislov
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Jitka Sojkova
- Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.,Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Barbara B Bendlin
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Sterling C Johnson
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Andrew L Alexander
- Waisman Laboratory for Brain Imaging and Behavior, Waisman Center, University of Wisconsin-Madison, Madison, Wisconsin.,Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.,Department of Psychiatry, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Catherine L Gallagher
- William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin.,Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.,Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
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39
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Ghazi Sherbaf F, Rostam Abadi Y, Mojtahed Zadeh M, Ashraf-Ganjouei A, Sanjari Moghaddam H, Aarabi MH. Microstructural Changes in Patients With Parkinson's Disease Comorbid With REM Sleep Behaviour Disorder and Depressive Symptoms. Front Neurol 2018; 9:441. [PMID: 29997561 PMCID: PMC6028696 DOI: 10.3389/fneur.2018.00441] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 05/25/2018] [Indexed: 12/14/2022] Open
Abstract
The diagnosis of Parkinson's disease (PD) is currently anchored on clinical motor symptoms, which appear more than 20 years after initiation of the neurotoxicity. Extra-nigral involvement in the onset of PD with probable nonmotor manifestations before the development of motor signs, lead us to the preclinical (asymptomatic) or prodromal stages of the disease (various nonmotor or subtle motor signs). REM sleep behavior disorder (RBD) and depression are established prodromal clinical markers of PD and predict worse motor and cognitive outcomes. Nevertheless, taken by themselves, these markers are not yet claimed to be practical in identifying high-risk individuals. Combining promising markers may be helpful in a reliable diagnosis of early PD. Therefore, we aimed to detect neural correlates of RBD and depression in 93 treatment-naïve and non-demented early PD by means of diffusion MRI connectometry. Comparing four groups of PD patients with or without comorbid RBD and/or depressive symptoms with each other and with 31 healthy controls, we found that these two non-motor symptoms are associated with lower connectivity in several white matter tracts including the cerebellar peduncles, corpus callosum and long association fibers such as cingulum, fornix, and inferior longitudinal fasciculus. For the first time, we were able to detect the involvement of short association fibers (U-fibers) in PD neurodegenerative process. Longitudinal studies on larger sample groups are needed to further investigate the reported associations.
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40
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Alshikho MJ, Zürcher NR, Loggia ML, Cernasov P, Reynolds B, Pijanowski O, Chonde DB, Garcia DI, Mainero C, Catana C, Chan J, Babu S, Paganoni S, Hooker JM, Atassi N. Integrated magnetic resonance imaging and [ 11 C]-PBR28 positron emission tomographic imaging in amyotrophic lateral sclerosis. Ann Neurol 2018; 83:1186-1197. [PMID: 29740862 PMCID: PMC6105567 DOI: 10.1002/ana.25251] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 05/03/2018] [Accepted: 05/03/2018] [Indexed: 11/10/2022]
Abstract
OBJECTIVE To characterize [11 C]-PBR28 brain uptake using positron emission tomography (PET) in people with amyotrophic lateral sclerosis (ALS) and primary lateral sclerosis (PLS). We have previously shown increased [11 C]-PBR28 uptake in the precentral gyrus in a small group of ALS patients. Herein, we confirm our initial finding, study the longitudinal changes, and characterize the gray versus white matter distribution of [11 C]-PBR28 uptake in a larger cohort of patients with ALS and PLS. METHODS Eighty-five participants including 53 with ALS, 11 with PLS, and 21 healthy controls underwent integrated [11 C]-PBR28 PET-magnetic resonance brain imaging. Patients were clinically assessed using the Upper Motor Neuron Burden (UMNB) and the Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised (ALSFRS-R). [11 C]-PBR28 uptake was quantified as standardized uptake value ratio (SUVR) and compared between groups. Cortical thickness and fractional anisotropy were compared between groups and correlated with SUVR and the clinical data. [11 C]-PBR28 uptake and ALSFRS-R were compared longitudinally over 6 months in 10 ALS individuals. RESULTS Whole brain voxelwise, surface-based, and region of interest analyses revealed increased [11 C]-PBR28 uptake in the precentral and paracentral gyri in ALS, and in the subcortical white matter for the same regions in PLS, compared to controls. The increase in [11 C]-PBR28 uptake colocalized and correlated with cortical thinning, reduced fractional anisotropy, and increased mean diffusivity, and correlated with higher UMNB score. No significant changes were detected in [11 C]-PBR28 uptake over 6 months despite clinical progression. INTERPRETATION Glial activation measured by in vivo [11 C]-PBR28 PET is increased in pathologically relevant regions in people with ALS and correlates with clinical measures. Ann Neurol 2018;83:1186-1197.
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Affiliation(s)
- Mohamad J. Alshikho
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
- Neurological Clinical Research Institute (NCRI), Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Nicole R. Zürcher
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Marco L. Loggia
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Paul Cernasov
- Neurological Clinical Research Institute (NCRI), Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Beverly Reynolds
- Neurological Clinical Research Institute (NCRI), Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Olivia Pijanowski
- Neurological Clinical Research Institute (NCRI), Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Daniel B. Chonde
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - David Izquierdo Garcia
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Caterina Mainero
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Ciprian Catana
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - James Chan
- Department of Biostatistics, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Suma Babu
- Neurological Clinical Research Institute (NCRI), Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Sabrina Paganoni
- Neurological Clinical Research Institute (NCRI), Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Jacob M. Hooker
- A. A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Nazem Atassi
- Neurological Clinical Research Institute (NCRI), Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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41
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Watve A, Gupta M, Khushu S, Rana P. Longitudinal changes in gray matter regions after cranial radiation and comparative analysis with whole body radiation: a DTI study. Int J Radiat Biol 2018; 94:532-541. [PMID: 29659316 DOI: 10.1080/09553002.2018.1466064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
PURPOSE Radiation-induced white matter changes are well known and vastly studied. However, radiation-induced gray matter alterations are still a research question. In the present study, these changes were assessed in a longitudinal manner using Diffusion Tensor Imaging (DTI) and further compared for cranial and whole body radiation exposure. MATERIALS AND METHODS Male mice (C57BL/6) were irradiated with cranial or whole body radiation followed by DTI study at 7T animal MRI system during predose, subacute and early delayed phases of radiation sickness. Fractional anisotropy (FA) and mean diffusivity (MD) values were obtained from brain's gray matter regions. RESULTS Decreased FA with increased MD was observed prominently in animals exposed to cranial radiation showing most changes at 8 months post irradiation. However, whole body radiation induced FA changes were mostly observed at 1 month post irradiation as compared to controls. CONCLUSIONS The differential response after whole body and cranial irradiation observed in the study depicts that radiation exposure of 5 Gy could induce permanent alterations in gray matter regions prominently as observed in Caudoputamen region at all the time points. Thus, our study has bolstered the role of DTI to probe microstructural changes in gray matter regions of brain after radiation exposure.
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Affiliation(s)
- Apurva Watve
- a NMR Research Centre , Institute of Nuclear Medicine and Allied Sciences , Delhi , India
| | - Mamta Gupta
- a NMR Research Centre , Institute of Nuclear Medicine and Allied Sciences , Delhi , India
| | - Subash Khushu
- a NMR Research Centre , Institute of Nuclear Medicine and Allied Sciences , Delhi , India
| | - Poonam Rana
- a NMR Research Centre , Institute of Nuclear Medicine and Allied Sciences , Delhi , India
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Boscolo Galazzo I, Brusini L, Obertino S, Zucchelli M, Granziera C, Menegaz G. On the Viability of Diffusion MRI-Based Microstructural Biomarkers in Ischemic Stroke. Front Neurosci 2018; 12:92. [PMID: 29515362 PMCID: PMC5826355 DOI: 10.3389/fnins.2018.00092] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 02/05/2018] [Indexed: 01/05/2023] Open
Abstract
Recent tract-based analyses provided evidence for the exploitability of 3D-SHORE microstructural descriptors derived from diffusion MRI (dMRI) in revealing white matter (WM) plasticity. In this work, we focused on the main open issues left: (1) the comparative analysis with respect to classical tensor-derived indices, i.e., Fractional Anisotropy (FA) and Mean Diffusivity (MD); and (2) the ability to detect plasticity processes in gray matter (GM). Although signal modeling in GM is still largely unexplored, we investigated their sensibility to stroke-induced microstructural modifications occurring in the contralateral hemisphere. A more complete picture could provide hints for investigating the interplay of GM and WM modulations. Ten stroke patients and ten age/gender-matched healthy controls were enrolled in the study and underwent diffusion spectrum imaging (DSI). Acquisitions at three and two time points (tp) were performed on patients and controls, respectively. For all subjects and acquisitions, FA and MD were computed along with 3D-SHORE-based indices [Generalized Fractional Anisotropy (GFA), Propagator Anisotropy (PA), Return To the Axis Probability (RTAP), Return To the Plane Probability (RTPP), and Mean Square Displacement (MSD)]. Tract-based analysis involving the cortical, subcortical and transcallosal motor networks and region-based analysis in GM were successively performed, focusing on the contralateral hemisphere to the stroke. Reproducibility of all the indices on both WM and GM was quantitatively proved on controls. For tract-based, longitudinal group analyses revealed the highest significant differences across the subcortical and transcallosal networks for all the indices. The optimal regression model for predicting the clinical motor outcome at tp3 included GFA, PA, RTPP, and MSD in the subcortical network in combination with the main clinical information at baseline. Region-based analysis in the contralateral GM highlighted the ability of anisotropy indices in discriminating between groups mainly at tp1, while diffusivity indices appeared to be altered at tp2. 3D-SHORE indices proved to be suitable in probing plasticity in both WM and GM, further confirming their viability as a novel family of biomarkers in ischemic stroke in WM and revealing their potential exploitability in GM. Their combination with tensor-derived indices can provide more detailed insights of the different tissue modulations related to stroke pathology.
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Affiliation(s)
| | - Lorenza Brusini
- Department of Computer Science, University of Verona, Verona, Italy
| | - Silvia Obertino
- Department of Computer Science, University of Verona, Verona, Italy
| | - Mauro Zucchelli
- Department of Computer Science, University of Verona, Verona, Italy
| | - Cristina Granziera
- Translational Imaging in Neurology Group, Department of Neurology, Basel University Hospital, Basel, Switzerland
| | - Gloria Menegaz
- Department of Computer Science, University of Verona, Verona, Italy
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Gupta A, Woodworth DC, Ellingson BM, Rapkin AJ, Naliboff B, Kilpatrick LA, Stains J, Masghati S, Tillisch K, Mayer EA, Labus JS. Disease-Related Microstructural Differences in the Brain in Women With Provoked Vestibulodynia. THE JOURNAL OF PAIN 2018; 19:528.e1-528.e15. [PMID: 29391213 DOI: 10.1016/j.jpain.2017.12.269] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 11/06/2017] [Accepted: 12/17/2017] [Indexed: 12/13/2022]
Abstract
Provoked vestibulodynia (PVD) is a chronic pelvic pain disorder affecting 16% of the female population. Neuroimaging studies have highlighted central abnormalities in PVD, similar to other chronic pelvic pain disorders, including brain regions involved in sensory processing and modulation of pain. The aim of the study was to determine alterations in the subvoxel, microstructural organization within tissues in PVD compared with healthy control participants (HCs) and a disease control group (irritable bowel syndrome [IBS]). Diffusion tensor imaging magnetic resonance imaging was conducted in 87 age-matched premenopausal women (29 PVD, 29 HCs, 29 IBS). Statistical parameter mapping of fractional anisotropy (FA) and mean diffusivity (MD) maps were used to identify microstructural difference in the brain specific to PVD or shared with IBS. PVD alterations in microstructural organization of the brain were predominantly observed in fibers associated with sensorimotor integration and pain processing that relay information between the thalamus, basal ganglia, sensorimotor, and insular cortex. PVD, compared with HCs, showed extensive increases in the FA of somatosensory and basal ganglia regions. In contrast, PVD and IBS subjects did not show any FA-related group differences. PVD subjects showed greater MD in the basal ganglia compared with HCs (higher MD in the internal capsule and pallidum) and IBS (higher MD in the putamen and pallidum). Increases in MD were associated with increased vaginal muscle tenderness and vulvar pain. The current findings highlight possible shared mechanisms between 2 different pelvic pain disorders, but also highlight the widespread alterations observed specifically in PVD compared with HCs. PERSPECTIVE Alterations in microstructure in PVD were observed in fibers associated with sensorimotor integration and pain processing, which were also associated with increased vaginal muscle tenderness and vulvar pain. These alterations may be contributing to increased pain sensitivity and tenderness, highlighting the need for new therapies targeting the central nervous system.
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Affiliation(s)
- Arpana Gupta
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Davis C Woodworth
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Benjamin M Ellingson
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Department of Radiology at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Andrea J Rapkin
- Department of Obstetrics and Gynecology at UCLA, Los Angeles, California
| | - Bruce Naliboff
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Lisa A Kilpatrick
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Jean Stains
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California
| | - Salome Masghati
- Department of Obstetrics and Gynecology at UCLA, Los Angeles, California
| | - Kirsten Tillisch
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Emeran A Mayer
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Jennifer S Labus
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California.
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Li C, Huang B, Zhang R, Ma Q, Yang W, Wang L, Wang L, Xu Q, Feng J, Liu L, Zhang Y, Huang R. Impaired topological architecture of brain structural networks in idiopathic Parkinson's disease: a DTI study. Brain Imaging Behav 2018; 11:113-128. [PMID: 26815739 DOI: 10.1007/s11682-015-9501-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Parkinson's disease (PD) is considered as a neurodegenerative disorder of the brain central nervous system. But, to date, few studies adopted the network model to reveal topological changes in brain structural networks in PD patients. Additionally, although the concept of rich club organization has been widely used to study brain networks in various brain disorders, there is no study to report the changed rich club organization of brain networks in PD patients. Thus, we collected diffusion tensor imaging (DTI) data from 35 PD patients and 26 healthy controls and adopted deterministic tractography to construct brain structural networks. During the network analysis, we calculated their topological properties, and built the rich club organization of brain structural networks for both subject groups. By comparing the between-group differences in topological properties and rich club organizations, we found that the connectivity strength of the feeder and local connections are lower in PD patients compared to those of the healthy controls. Furthermore, using a network-based statistic (NBS) approach, we identified uniformly significantly decreased connections in two modules, the limbic/paralimbic/subcortical module and the cognitive control/attention module, in patients compared to controls. In addition, for the topological properties of brain network topology in the PD patients, we found statistically increased shortest path length and decreased global efficiency. Statistical comparisons of nodal properties were also widespread in the frontal and parietal regions for the PD patients. These findings may provide useful information to better understand the abnormalities of brain structural networks in PD patients.
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Affiliation(s)
- Changhong Li
- Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, Brain Study Institute, South China Normal University, Guangzhou, 510631, China
| | - Biao Huang
- Department of Radiology, Guangdong Academy of Medical Sciences, Guangdong General Hospital, Guangzhou, China.
| | - Ruibin Zhang
- Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, Brain Study Institute, South China Normal University, Guangzhou, 510631, China
| | - Qing Ma
- Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, Brain Study Institute, South China Normal University, Guangzhou, 510631, China
| | - Wanqun Yang
- Department of Radiology, Guangdong Academy of Medical Sciences, Guangdong General Hospital, Guangzhou, China
| | - Lijuan Wang
- Department of Neurology, Guangdong Academy of Medical Sciences, Guangdong General Hospital, Guangzhou, China
| | - Limin Wang
- Department of Neurology, Guangdong Academy of Medical Sciences, Guangdong General Hospital, Guangzhou, China
| | - Qin Xu
- Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, Brain Study Institute, South China Normal University, Guangzhou, 510631, China
| | - Jieying Feng
- Department of Radiology, Guangdong Academy of Medical Sciences, Guangdong General Hospital, Guangzhou, China
| | - Liqing Liu
- Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, Brain Study Institute, South China Normal University, Guangzhou, 510631, China
| | - Yuhu Zhang
- Department of Neurology, Guangdong Academy of Medical Sciences, Guangdong General Hospital, Guangzhou, China
| | - Ruiwang Huang
- Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, Brain Study Institute, South China Normal University, Guangzhou, 510631, China.
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Li XR, Ren YD, Cao B, Huang XL. Analysis of white matter characteristics with tract-based spatial statistics according to diffusion tensor imaging in early Parkinson's disease. Neurosci Lett 2017; 675:127-132. [PMID: 29199095 DOI: 10.1016/j.neulet.2017.11.064] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 11/09/2017] [Accepted: 11/29/2017] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To analyze the microstructure of brain white matter according to diffusion tensor imaging (DTI) based on tract-based spatial statistics (TBSS) in early Parkinson's disease (PD). MATERIALS AND METHODS A total of 31 age- and sex-matched early PD patients and 22 healthy volunteers were recruited in the present study. DTI was performed, and the data analyzed with fsl4.0 software. The fractional anisotropy (FA) was compared between both groups with an independent t test, and the differential area was analyzed. White matter fiber tracts with significant difference in FA between the two groups were selected, and their FAs were measured. Pearson's correlation analysis was employed to analyze the unified Parkinson's disease rating scale (UPDRS) score and its association with FA of different tracts. RESULTS When compared with healthy volunteers, early PD patients had reduced FA in the following areas: bilateral anterior corona radiate, upper corona radiate, fasciculus arcuatus, crus anterius capsulae internae, crus posterius capsulae internae, capsula externa, posterior thalamic radiation, optic radiation, sagittal layer (including fasciculus arcuatus and inferior fronto-occipital fasciculus), crura fornicis, stria terminalis, fornix, genu, body and pad of corpus callosum, left unciform fasciculus, right cingulate bundle, right medipeduncle, and arcuate fibers in the bilateral frontal, temporal, and occipital lobes (P < 0.05). When compared with healthy volunteers, early PD patients showed abnormal FA of fasciculus in the white matter mainly in following areas: bilateral crus anterius capsulae internae, bilateral capsula externa, right anterior corona radiate, body and pad of bilateral corpus callosum, and left sagittal layer (including fasciculi longitudinalis inferior and fasciculus occipitofrontalis inferior) (P < 0.05). In addition, in early PD patients, the UPDRS score and movement score had no relationship with the FA of different fasciculi in the white matter (P > 0.05). CONCLUSION There is wide alteration of white matter microstructure in early PD patients, which is characterized by disruption of projection fibers in the descending pathway, limbic system-related fasciculi, corpus callosum, thalamus after radiation, posterior thalamic radiation, Gratiolet's bundle and other fasciculi in the white matter.
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Affiliation(s)
- Xiang-Rong Li
- Department of Radiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Province 530021, PR China.
| | - Yan-De Ren
- Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, 266003, PR China
| | - Bo Cao
- Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong Province, 266003, PR China
| | - Xuan-Li Huang
- Department of Radiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Province 530021, PR China
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Haghshomar M, Rahmani F, Hadi Aarabi M, Shahjouei S, Sobhani S, Rahmani M. White Matter Changes Correlates of Peripheral Neuroinflammation in Patients with Parkinson's Disease. Neuroscience 2017; 403:70-78. [PMID: 29126955 DOI: 10.1016/j.neuroscience.2017.10.050] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 10/29/2017] [Accepted: 10/31/2017] [Indexed: 12/23/2022]
Abstract
Neuroinflammatory pathology has long been identified to contribute to the pathology of Parkinson disease. Early microstructural changes in white matter tracts might give a clue for earlier detection of PD. We investigated through diffusion MRI connectometry the structural correlates of white matter tracts of 81 patients with PD with whole blood neutrophil-to-lymphocyte ratio (NLR), controlling for age and sex. Diffusion data were reconstructed in the MNI space using q-space diffeomorphic reconstruction to obtain the spin distribution function. The spin distribution function (SDF) values were used in DMRI connectometry analysis. The connectometry analyses identified white matter QA of the following fibers to be correlated with NLR score after adjustment for age and sex: bilateral cingulum, body and left crus of fornix, bilateral corticospinal tract (CST), and body and splenium of corpus callosum (CC) and superior cerebellar peduncle with decreased connectivity related to NLR (FDR = 0.04542). Keeping with emerging evidence on the role of neuroinflammation in PD pathology, these results with functional relevance to prodromal Parkinson disease, bring new insights to pivotal role of peripheral inflammation in CNS neurodegeneration.
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Affiliation(s)
- Maryam Haghshomar
- NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzaneh Rahmani
- NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Mohammad Hadi Aarabi
- NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Shima Shahjouei
- NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Department of Neurology, Tehran University of Medical Sciences, Tehran, Iran
| | - Soheila Sobhani
- NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Rahmani
- NeuroImaging Network (NIN), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Endocrine Research Center (ERC), Shahid Beheshti University of Medical Sciences (SBMU), Tehran, Iran
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Li C, Chen M, Zhao X, Wang R, Chen H, Su W, Li S, Lou B, Song G, Zhang S, Zhang J, Zhou J. Chemical Exchange Saturation Transfer MRI Signal Loss of the Substantia Nigra as an Imaging Biomarker to Evaluate the Diagnosis and Severity of Parkinson's Disease. Front Neurosci 2017; 11:489. [PMID: 28912676 PMCID: PMC5583514 DOI: 10.3389/fnins.2017.00489] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Accepted: 08/17/2017] [Indexed: 12/15/2022] Open
Abstract
The early diagnosis of Parkinson's disease (PD) and the accurate evaluation of disease severity are crucial for intervention and treatment in PD patients. In this study, we applied chemical exchange saturation transfer (CEST) imaging to patients at different stages of PD and explored the clinical value of the CEST signal loss of the substantia nigra as an imaging biomarker of PD. The measured CEST signal intensities (including amide proton transfer-weighted or APTw, and total CEST or CESTtotal) of the substantia nigra in PD patients showed a significantly decreased tendency with PD progression. Compared to normal controls, the APTw and CESTtotal intensities of PD patients significantly decreased at both the early and advanced or late stages. These APTw and CESTtotal values of the substantia nigra were also significantly lower in advanced or late stage PD patients than in early stage PD patients. For PD patients with unilateral symptoms, the APTw and CESTtotal values in the substantia nigra on the affected side were significantly lower than those in normal controls. Both the APTw and CESTtotal values of PD were significantly correlated with the severity of disease and disease duration. Our findings suggest that the CEST MRI signal of the substantia nigra is a potential imaging biomarker for the diagnosis and monitoring of the severity of PD.
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Affiliation(s)
- Chunmei Li
- Department of Radiology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Min Chen
- Department of Radiology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Xuna Zhao
- Department of Radiology, Johns Hopkins UniversityBaltimore, MD, United States
| | - Rui Wang
- Department of Radiology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Haibo Chen
- Department of Neurology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Wen Su
- Department of Neurology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Shuhua Li
- Department of Neurology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Baohui Lou
- Department of Radiology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Guodong Song
- Department of Radiology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Shuai Zhang
- Department of Radiology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Jintao Zhang
- Department of Radiology, Beijing Hospital, National Center of GerontologyBeijing, China
| | - Jinyuan Zhou
- Department of Radiology, Johns Hopkins UniversityBaltimore, MD, United States
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Arrigo A, Calamuneri A, Milardi D, Mormina E, Rania L, Postorino E, Marino S, Di Lorenzo G, Anastasi GP, Ghilardi MF, Aragona P, Quartarone A, Gaeta M. Visual System Involvement in Patients with Newly Diagnosed Parkinson Disease. Radiology 2017; 285:885-895. [PMID: 28696183 DOI: 10.1148/radiol.2017161732] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Purpose To assess intracranial visual system changes of newly diagnosed Parkinson disease in drug-naïve patients. Materials and Methods Twenty patients with newly diagnosed Parkinson disease and 20 age-matched control subjects were recruited. Magnetic resonance (MR) imaging (T1-weighted and diffusion-weighted imaging) was performed with a 3-T MR imager. White matter changes were assessed by exploring a white matter diffusion profile by means of diffusion-tensor imaging-based parameters and constrained spherical deconvolution-based connectivity analysis and by means of white matter voxel-based morphometry (VBM). Alterations in occipital gray matter were investigated by means of gray matter VBM. Morphologic analysis of the optic chiasm was based on manual measurement of regions of interest. Statistical testing included analysis of variance, t tests, and permutation tests. Results In the patients with Parkinson disease, significant alterations were found in optic radiation connectivity distribution, with decreased lateral geniculate nucleus V2 density (F, -8.28; P < .05), a significant increase in optic radiation mean diffusivity (F, 7.5; P = .014), and a significant reduction in white matter concentration. VBM analysis also showed a significant reduction in visual cortical volumes (P < .05). Moreover, the chiasmatic area and volume were significantly reduced (P < .05). Conclusion The findings show that visual system alterations can be detected in early stages of Parkinson disease and that the entire intracranial visual system can be involved. © RSNA, 2017 Online supplemental material is available for this article.
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Affiliation(s)
- Alessandro Arrigo
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Alessandro Calamuneri
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Demetrio Milardi
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Enricomaria Mormina
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Laura Rania
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Elisa Postorino
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Silvia Marino
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Giuseppe Di Lorenzo
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Giuseppe Pio Anastasi
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Maria Felice Ghilardi
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Pasquale Aragona
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Angelo Quartarone
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
| | - Michele Gaeta
- From the Department of Opthalmology, IRCCS Ospedale San Raffaele, University Vita-Salute, via Olgettina 60, Milan, 20132, Italy (A.A.); Department of Biomedical Science and Morphological and Functional Images, University of Messina, Azienda Ospedaliera Universitaria Policlinico G. Martino, Messina, Italy (A.A., A.C., D.M., E.M., L.R., E.P., G.P.A., P.A., A.Q., M.G.); IRCCS Centro Neurolesi Bonino Pulejo, Messina, Italy (D.M., S.M., G.D.L.); and Sophie Davis School for Biomedical Education at CCNY, City University of New York, New York, NY (M.F.G.)
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Joshi N, Rolheiser TM, Fisk JD, McKelvey JR, Schoffer K, Phillips G, Armstrong M, Khan MN, Leslie RA, Rusak B, Robertson HA, Good KP. Lateralized microstructural changes in early-stage Parkinson's disease in anterior olfactory structures, but not in substantia nigra. J Neurol 2017; 264:1497-1505. [PMID: 28653210 DOI: 10.1007/s00415-017-8555-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 06/20/2017] [Accepted: 06/21/2017] [Indexed: 12/17/2022]
Abstract
Parkinson's disease (PD) is a progressive neurological disorder characterized by motor symptoms as well as severe deficits in olfactory function and microstructural changes in olfactory brain regions. Because of the evidence of asymmetric neuropathological features in early-stage PD, we examined whether lateralized microstructural changes occur in olfactory brain regions and the substantia nigra in a group of early-stage PD patients. Using diffusion tensor imaging (DTI) and the University of Pennsylvania Smell Identification Test (UPSIT), we assessed 24 early-stage PD patients (Hoehn and Yahr stage 1 or 2) and 26 healthy controls (HC). We used DTI and a region of interest (ROI) approach to study the microstructure of the left and right anterior olfactory structures (AOS; comprising the olfactory bulbs and anterior end of the olfactory tracts) and the substantia nigra (SN). PD patients had reduced UPSIT scores relative to HC and showed increased mean diffusivity (MD) in the SN, with no lateralized differences. Significant group differences in fractional anisotropy (FA) and MD were seen in the AOS, but these differences were restricted to the right side and were not associated with the primary side of motor symptoms amongst PD patients. No associations were observed between lateralized motor impairment and lateralized microstructural changes in AOS. Impaired olfaction and microstructural changes in AOS are useful for early identification of PD but asymmetries in AOS microstructure seem unrelated to the laterality of PD motor symptoms.
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Affiliation(s)
- N Joshi
- Department of Psychiatry, IWK Hospital, Halifax, NS, Canada
| | - T M Rolheiser
- Department of Psychiatry, Dalhousie University, 4064 AJLB, 5909 Veterans Memorial Lane, Halifax, NS, Canada
| | - J D Fisk
- Department of Psychology, Nova Scotia Health Authority, Central Zone, Halifax, NS, Canada
| | - J R McKelvey
- Division of Neurology, Department of Medicine, Nova Scotia Health Authority, Halifax, NS, Canada
| | - K Schoffer
- Division of Neurology, Department of Medicine, Nova Scotia Health Authority, Halifax, NS, Canada
| | - G Phillips
- Division of Respirology, Department of Medicine, Nova Scotia Health Authority, Halifax, NS, Canada
| | - M Armstrong
- Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - M N Khan
- Department of Radiology, IWK Hospital, Halifax, NS, Canada
| | - R A Leslie
- Department of Medical Neurosciences, Dalhousie University, Halifax, NS, Canada
| | - B Rusak
- Department of Psychiatry, Dalhousie University, 4064 AJLB, 5909 Veterans Memorial Lane, Halifax, NS, Canada.,Department of Psychology and Neuroscience, Dalhousie University, Halifax, NS, Canada
| | - H A Robertson
- Department of Psychiatry, Dalhousie University, 4064 AJLB, 5909 Veterans Memorial Lane, Halifax, NS, Canada.,Division of Neurology, Department of Medicine, Nova Scotia Health Authority, Halifax, NS, Canada.,Department of Pharmacology, Dalhousie University, Halifax, NS, Canada
| | - K P Good
- Department of Psychiatry, Dalhousie University, 4064 AJLB, 5909 Veterans Memorial Lane, Halifax, NS, Canada. .,Department of Psychology and Neuroscience, Dalhousie University, Halifax, NS, Canada.
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Chiang PL, Chen HL, Lu CH, Chen PC, Chen MH, Yang IH, Tsai NW, Lin WC. White matter damage and systemic inflammation in Parkinson's disease. BMC Neurosci 2017; 18:48. [PMID: 28595572 PMCID: PMC5465562 DOI: 10.1186/s12868-017-0367-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Accepted: 05/31/2017] [Indexed: 01/02/2023] Open
Abstract
Background Systemic inflammation and white matter (WM) alterations have been noted as effects of Parkinson’s disease (PD). This study sought to evaluate WM integrity in PD patients using diffusion tensor imaging (DTI) and to assess its relationship with systemic inflammation. Methods Sixty-six patients with PD (23 men and 43 women) and 67 healthy volunteers (29 men and 38 women) underwent blood sampling to quantify inflammatory markers and DTI scans to determine fiber integrity. The inflammatory markers included leukocyte apoptosis, as well as cellular and serum adhesion molecules, in each peripheral blood sample. DTI-related indices [including fractional anisotropy (FA), axial diffusivity (AD), radial diffusivity (RD), and mean diffusivity (MD)] were derived from DTI scans. The resulting FA maps were compared using voxel-based statistics to determine differences between the PD and control groups. The differences in the DTI indices, clinical severity, and inflammatory markers were correlated. Results Exploratory group-wise comparison between the two groups revealed that the PD patients exhibited extensive DTI index differences. Low FA accompanied by high RD and MD, without significant differences in AD, suggesting a demyelination process, were found in the parietal, occipital, cerebellar, and insular WM of the PD patients. The declined DTI indices were significantly correlated with increased clinical disease severity, adhesion molecules, and leukocyte apoptosis. Conclusions Patients with PD experience WM integrity damage in vulnerable regions, and these impairments are associated with increased disease severity and systemic inflammation. The possible interactions among them may represent variant neuronal injuries and their consequent processes in PD. Electronic supplementary material The online version of this article (doi:10.1186/s12868-017-0367-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Pi-Ling Chiang
- Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123 Ta-Pei Road, Niao-Sung, Kaohsiung, 83305, Taiwan
| | - Hsiu-Ling Chen
- Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123 Ta-Pei Road, Niao-Sung, Kaohsiung, 83305, Taiwan
| | - Cheng-Hsien Lu
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan.,Department of Biological Science, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Pei-Chin Chen
- Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123 Ta-Pei Road, Niao-Sung, Kaohsiung, 83305, Taiwan
| | - Meng-Hsiang Chen
- Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123 Ta-Pei Road, Niao-Sung, Kaohsiung, 83305, Taiwan
| | - I-Hsiao Yang
- Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123 Ta-Pei Road, Niao-Sung, Kaohsiung, 83305, Taiwan
| | - Nai-Wen Tsai
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Wei-Che Lin
- Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123 Ta-Pei Road, Niao-Sung, Kaohsiung, 83305, Taiwan.
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