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Khorasani A, Tavakoli MB, Saboori M, Jalilian M. Preliminary study of multiple b-value diffusion-weighted images and T1 post enhancement magnetic resonance imaging images fusion with Laplacian Re-decomposition (LRD) medical fusion algorithm for glioma grading. Eur J Radiol Open 2021; 8:100378. [PMID: 34632000 DOI: 10.1016/j.ejro.2021.100378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/20/2021] [Accepted: 09/26/2021] [Indexed: 12/21/2022] Open
Abstract
LRD medical image fusion algorithm can be used for glioma grading. We can use the LRD fusion algorithm with MRI image for glioma grading. Fusing of DWI (b50) and T1 enhancement (T1Gd) by LRD, have highest diagnostic value for glioma grading.
Background Grade of brain tumor is thought to be the most significant and crucial component in treatment management. Recent development in medical imaging techniques have led to the introduce non-invasive methods for brain tumor grading such as different magnetic resonance imaging (MRI) protocols. Combination of different MRI protocols with fusion algorithms for tumor grading is used to increase diagnostic improvement. This paper investigated the efficiency of the Laplacian Re-decomposition (LRD) fusion algorithms for glioma grading. Procedures In this study, 69 patients were examined with MRI. The T1 post enhancement (T1Gd) and diffusion-weighted images (DWI) were obtained. To evaluated LRD performance for glioma grading, we compared the parameters of the receiver operating characteristic (ROC) curves. Findings We found that the average Relative Signal Contrast (RSC) for high-grade gliomas is greater than RSCs for low-grade gliomas in T1Gd images and all fused images. No significant difference in RSCs of DWI images was observed between low-grade and high-grade gliomas. However, a significant RSCs difference was detected between grade III and IV in the T1Gd, b50, and all fussed images. Conclusions This research suggests that T1Gd images are an appropriate imaging protocol for separating low-grade and high-grade gliomas. According to the findings of this study, we may use the LRD fusion algorithm to increase the diagnostic value of T1Gd and DWI picture for grades III and IV glioma distinction. In conclusion, this article has emphasized the significance of the LRD fusion algorithm as a tool for differentiating grade III and IV gliomas.
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Key Words
- ADC, apparent diffusion coefficient
- AUC, Aera Under Curve
- BOLD, blood oxygen level dependent imaging
- CBV, Cerebral Blood Volume
- DCE, Dynamic contrast enhancement
- DGR, Decision Graph Re-decomposition
- DWI, Diffusion-weighted imaging
- Diffusion-weighted images
- FA, flip angle
- Fusion algorithm
- GBM, glioblastomas
- GDIE, Gradient Domain Image Enhancement
- Glioma
- Grade
- IRS, Inverse Re-decomposition Scheme
- LEM, Local Energy Maximum
- LP, Laplacian Pyramid
- LRD, Laplacian Re-decomposition
- Laplacian Re-decomposition
- MLD, Maximum Local Difference
- MRI, magnetic resonance imaging
- MRS, Magnetic resonance spectroscopy
- MST, Multi-scale transform
- Magnetic resonance imaging
- NOD, Non-overlapping domain
- OD, overlapping domain
- PACS, PACS picture archiving and communication system
- ROC, receiver operating characteristic curve
- ROI, regions of interest
- RSC, Relative Signal Contrast
- SCE, Susceptibility contrast enhancement
- T1Gd, T1 post enhancement
- TE, time of echo
- TI, time of inversion
- TR, repetition time
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Truong M, Lennartsson F, Bibic A, Sundius L, Persson A, Siemund R, In’t Zandt R, Goncalves I, Wassélius J. Classifications of atherosclerotic plaque components with T1 and T2* mapping in 11.7 T MRI. Eur J Radiol Open 2021; 8:100323. [PMID: 33532518 PMCID: PMC7822939 DOI: 10.1016/j.ejro.2021.100323] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND AND AIMS Histopathology is the gold standard for analysis of atherosclerotic plaques but has drawbacks due to the destructive nature of the method. Ex vivo MRI is a non-destructive method to image whole plaques. Our aim was to use quantitative high field ex vivo MRI to classify plaque components, with histology as gold standard. METHODS Surgically resected carotid plaques from 12 patients with recent TIA or stroke were imaged at 11.7 T MRI. Quantitative T1/T2* mapping sequences and qualitative T1/T2* gradient echo sequences with voxel size of 30 × 30 × 60 μm3 were obtained prior to histological preparation, sectioning and staining for lipids, inflammation, hemorrhage, and fibrous tissue. Regions of interest (ROI) were selected based on the histological staining at multiple levels matched between histology and MRI. The MRI parameters of each ROI were then analyzed with quadratic discriminant analysis (QDA) for classification. RESULTS A total of 965 ROIs, at 70 levels matched between histology and MRI, were registered based on histological staining. In the nine plaques where three or more plaque components were possible to co-localize with MRI, the mean degree of misclassification by QDA was 16.5 %. One of the plaques contained mostly fibrous tissue and lipids and had no misclassifications, and two plaques mostly contained fibrous tissue. QDA generally showed good classification for fibrous tissue and lipids, whereas plaques with hemorrhage and inflammation had more misclassifications. CONCLUSION 11.7 T ex vivo high field MRI shows good visual agreement with histology in carotid plaques. T1/T2* maps analyzed with QDA is a promising non-destructive method to classify plaque components, but with a higher degree of misclassifications in plaques with hemorrhage or inflammation.
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Key Words
- 11.7 T MRI
- 11.7T, 11.7 Tesla
- 3T, 3 Tesla
- Atherosclerosis
- BSA, bovine serum albumin
- CI, confidence interval
- CTA, computed tomography angiography
- Carotid plaque
- Classification
- FA, flip angle
- FOV, field of view
- GE3D, gradient echo three dimensional
- HRP, horse radish peroxidase
- ICA, internal carotid artery
- IPH, intra-plaque hemorrhage
- LRNC, lipid rich necrotic core
- MRI, magnetic resonance imaging
- OCT, optimal cutting temperature
- Plaque components
- RF, radio frequency
- ROI, region of interest
- SD, standard deviation
- T1 maps
- T1w, T1 weighted
- T2*maps
- T2*w, T2 star weighted
- TBS, tris-buffered saline
- TE, echo time
- TIA, transient ischemic attack
- TR, repetition time
- ms, millisecond
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Affiliation(s)
- My Truong
- Diagnostic Radiology, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Medical Imaging Department, Neuroradiology, 22185, Lund, Sweden
| | - Finn Lennartsson
- Diagnostic Radiology, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Medical Imaging Department, Neuroradiology, 22185, Lund, Sweden
| | - Adnan Bibic
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, F. M. Kirby Center, 707 North Broadway, Baltimore, MD, 21 205, USA
| | - Lena Sundius
- Clinical Sciences Malmö, Lund University, Jan Waldenströmsg 35, 91-12, Skåne University Hospital, 20502, Malmö, Sweden
| | - Ana Persson
- Clinical Sciences Malmö, Lund University, Jan Waldenströmsg 35, 91-12, Skåne University Hospital, 20502, Malmö, Sweden
| | - Roger Siemund
- Diagnostic Radiology, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Medical Imaging Department, Neuroradiology, 22185, Lund, Sweden
| | - René In’t Zandt
- Lund University Bioimaging Centre, Lund University, Klinikgatan 32, BMC D11, SE-221 84, Lund, Sweden
| | - Isabel Goncalves
- Cardiology, Skåne University Hospital, Sweden
- Clinical Sciences Malmö, Lund University, Jan Waldenströmsg 35, 91-12, Skåne University Hospital, 20502, Malmö, Sweden
| | - Johan Wassélius
- Diagnostic Radiology, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Medical Imaging Department, Neuroradiology, 22185, Lund, Sweden
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Huang L, Zhao P, Tang D, Zhu T, Han R, Zhan C, Liu W, Zeng H, Tao Q, Xia L. Cardiac Involvement in Patients Recovered From COVID-2019 Identified Using Magnetic Resonance Imaging. JACC Cardiovasc Imaging 2020; 13:2330-2339. [PMID: 32763118 PMCID: PMC7214335 DOI: 10.1016/j.jcmg.2020.05.004] [Citation(s) in RCA: 357] [Impact Index Per Article: 89.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 12/14/2022]
Abstract
Objectives This study evaluated cardiac involvement in patients recovered from coronavirus disease-2019 (COVID-19) using cardiac magnetic resonance (CMR). Background Myocardial injury caused by COVID-19 was previously reported in hospitalized patients. It is unknown if there is sustained cardiac involvement after patients' recovery from COVID-19. Methods Twenty-six patients recovered from COVID-19 who reported cardiac symptoms and underwent CMR examinations were retrospectively included. CMR protocols consisted of conventional sequences (cine, T2-weighted imaging, and late gadolinium enhancement [LGE]) and quantitative mapping sequences (T1, T2, and extracellular volume [ECV] mapping). Edema ratio and LGE were assessed in post-COVID-19 patients. Cardiac function, native T1/T2, and ECV were quantitatively evaluated and compared with controls. Results Fifteen patients (58%) had abnormal CMR findings on conventional CMR sequences: myocardial edema was found in 14 (54%) patients and LGE was found in 8 (31%) patients. Decreased right ventricle functional parameters including ejection fraction, cardiac index, and stroke volume/body surface area were found in patients with positive conventional CMR findings. Using quantitative mapping, global native T1, T2, and ECV were all found to be significantly elevated in patients with positive conventional CMR findings, compared with patients without positive findings and controls (median [interquartile range]: native T1 1,271 ms [1,243 to 1,298 ms] vs. 1,237 ms [1,216 to 1,262 ms] vs. 1,224 ms [1,217 to 1,245 ms]; mean ± SD: T2 42.7 ± 3.1 ms vs. 38.1 ms ± 2.4 vs. 39.1 ms ± 3.1; median [interquartile range]: 28.2% [24.8% to 36.2%] vs. 24.8% [23.1% to 25.4%] vs. 23.7% [22.2% to 25.2%]; p = 0.002; p < 0.001, and p = 0.002, respectively). Conclusions Cardiac involvement was found in a proportion of patients recovered from COVID-19. CMR manifestation included myocardial edema, fibrosis, and impaired right ventricle function. Attention should be paid to the possible myocardial involvement in patients recovered from COVID-19 with cardiac symptoms.
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Key Words
- ACE2, angiotensin-converting enzyme 2
- AHA, American Heart Association
- BSA, body surface area
- CI, cardiac index
- CMR, cardiac magnetic resonance
- CO, cardiac output
- COVID-19, coronavirus disease-2019
- ECV, extracellular volume
- EDV, end-diastolic volume
- EF, ejection fraction
- ER, edema ratio
- ESV, end-systolic volume
- FA, flip angle
- FOV, field of view
- IQR, interquartile range
- LGE, late gadolinium enhancement
- LV, left ventricle
- LVEF, left ventricular ejection fraction
- PSIR, phase-sensitive inversion-recovery
- RT-PCR, reverse transcription and polymerase chain reaction
- RV, right ventricle
- RVEF, right ventricular ejection fraction
- SARS-CoV-2, severe acute respiratory syndrome-coronavirus-2
- SI, signal intensity
- SSFP, steady state free precession
- STIR, short tau inversion recovery
- SV, stroke volume
- T2WI, T2-weighted imaging
- TE, echo time
- TR, repetition time
- cardiac involvement
- cardiac magnetic resonance imaging
- coronavirus disease-2019
- hs-cTnI, high-sensitive cardiac troponin I
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MESH Headings
- Adult
- COVID-19
- China
- Coronavirus Infections/complications
- Coronavirus Infections/diagnosis
- Coronavirus Infections/therapy
- Edema, Cardiac/diagnostic imaging
- Edema, Cardiac/etiology
- Edema, Cardiac/pathology
- Female
- Fibrosis
- Humans
- Magnetic Resonance Imaging, Cine
- Male
- Middle Aged
- Myocardium/pathology
- Pandemics
- Pneumonia, Viral/complications
- Pneumonia, Viral/diagnosis
- Pneumonia, Viral/therapy
- Predictive Value of Tests
- Remission Induction
- Retrospective Studies
- Ventricular Dysfunction, Right/diagnostic imaging
- Ventricular Dysfunction, Right/etiology
- Ventricular Dysfunction, Right/physiopathology
- Ventricular Function, Right
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Affiliation(s)
- Lu Huang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peijun Zhao
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dazhong Tang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tong Zhu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rui Han
- Department of Radiology, Wuhan No.1 Hospital, Wuhan, China
| | - Chenao Zhan
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Weiyong Liu
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hesong Zeng
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Qian Tao
- Division of Imaging Processing, Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands.
| | - Liming Xia
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Jerban S, Ma Y, Dorthe EW, Kakos L, Le N, Alenezi S, Sah RL, Chang EY, D'Lima D, Du J. Assessing cortical bone mechanical properties using collagen proton fraction from ultrashort echo time magnetization transfer (UTE-MT) MRI modeling. Bone Rep 2019; 11:100220. [PMID: 31440531 PMCID: PMC6700521 DOI: 10.1016/j.bonr.2019.100220] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 08/02/2019] [Indexed: 12/19/2022] Open
Abstract
Cortical bone shows as a signal void when using conventional clinical magnetic resonance imaging (MRI). Ultrashort echo time MRI (UTE-MRI) can acquire high signal from cortical bone, thus enabling quantitative assessments. Magnetization transfer (MT) imaging combined with UTE-MRI can indirectly assess protons in the organic matrix of bone. This study aimed to examine UTE-MT MRI techniques to estimate the mechanical properties of cortical bone. A total of 156 rectangular human cortical bone strips were harvested from the tibial and femoral midshafts of 43 donors (62 ± 22 years old, 62 specimens from females, 94 specimens from males). Bone specimens were scanned using UTE-MT sequences on a clinical 3 T MRI scanner and on a micro-computed tomography (μCT) scanner. A series of MT pulse saturation powers (400°, 600°, 800°) and frequency offsets (2, 5, 10, 20, 50 kHz) was used to measure the macromolecular fraction (MMF) utilizing a two-pool MT model. Failure mechanical properties of the bone specimens were measured using 4-point bending tests. MMF from MRI results showed significant strong correlations with cortical bone porosity (R = -0.72, P < 0.01) and bone mineral density (BMD) (R = +0.71, P < 0.01). MMF demonstrated significant moderate correlations with Young modulus, yield stress, and ultimate stress (R = 0.60-0.61, P < 0.01). These results suggest that the two-pool UTE-MT model focusing on the organic matrix of bone can potentially serve as a novel tool to detect the variations of bone mechanical properties and intracortical porosity.
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Key Words
- 3D, three-dimensional
- 3D-UTE, three-dimensional ultrashort echo time imaging
- BMD, bone mineral density
- Bone microstructure
- CT, computed tomography
- Cortical bone
- DEXA, dual-energy X-ray absorptiometry
- FA, flip angle
- FOV, field of view
- MMF, macromolecular proton fraction
- MR, magnetic resonance
- MRI
- MRI, magnetic resonance imaging
- MT, magnetization transfer
- Magnetization transfer
- Mechanical properties
- PBS, phosphate-buffered saline
- RF, radio frequency
- ROI, region of interest
- T2MM, macromolecular T2
- TE, echo time
- TR, repetition time
- Ultrashort echo time
- μCT, micro-computed tomography
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, CA 92093, USA
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, CA 92093, USA
| | - Erik W Dorthe
- Shiley Center for Orthopedic Research and Education at Scripps Clinic, La Jolla, CA 92037, USA
| | - Lena Kakos
- Department of Radiology, University of California, San Diego, CA 92093, USA
| | - Nicole Le
- Radiology Service, VA San Diego Healthcare System, San Diego, CA 92161, USA
| | - Salem Alenezi
- Research and Laboratories Sector, Saudi Food and Drug Authority, Riyadh 3292, Saudi Arabia
| | - Robert L Sah
- Department of Bioengineering, University of California, San Diego, CA 92093, USA.,Department of Orthopaedic Surgery, University of California, San Diego, CA 92093, USA
| | - Eric Y Chang
- Radiology Service, VA San Diego Healthcare System, San Diego, CA 92161, USA.,Department of Radiology, University of California, San Diego, CA 92093, USA
| | - Darryl D'Lima
- Shiley Center for Orthopedic Research and Education at Scripps Clinic, La Jolla, CA 92037, USA
| | - Jiang Du
- Department of Radiology, University of California, San Diego, CA 92093, USA
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Sadahide K, Teishima J, Inoue S, Tamura T, Kamei N, Adachi N, Matsubara A. Endoscopic repair of the urinary bladder with magnetically labeled mesenchymal stem cells: Preliminary report. Regen Ther 2018; 10:46-53. [PMID: 30581896 PMCID: PMC6299148 DOI: 10.1016/j.reth.2018.10.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/07/2018] [Accepted: 10/30/2018] [Indexed: 01/01/2023] Open
Abstract
Introduction Transurethral resection of a bladder tumor (TURBT) using a resectoscope has been standard treatment for bladder cancer. However, no treatment method promotes the repair of resected bladder tissue. The aim of this study was to examine the healing process of damaged bladder tissue after a transurethral injection of bone marrow mesenchymal stem cells (MSCs) into the bladder. An injection of magnetic MSCs meant that they accumulated in the damaged area of the bladder. Another aim of this study was to compare the acceleration effect of MSC magnetic delivery on the repair of bladder tissue with that of non-magnetic MSC injection. Methods Using the transurethral approach to avoid opening the abdomen, electrofulguration was carried out on the anterior wall of the urinary bladder of white Japanese rabbits to mimic tumor resection. An external magnetic field directed at the injured site was then applied using a 1-tesla (T) permanent magnet. Twelve rabbits were divided into three groups. The 1 × 106 of magnetically labeled MSCs were injected into the urinary bladder with or without the magnetic field (MSC M+ and MSC M-groups, respectively), and phosphate-buffered saline was injected as the control. The effects of the injections in the three groups at 14 days were examined using 4.7-T magnetic resonance imaging (MRI) then macroscopically and histologically. The mRNA expressions of several cytokines in the repair tissues were assessed using real-time polymerase chain reaction. Results The macroscopic findings showed the area of repair tissue in the MSC M+ group to be larger than that in either the MSC M-group or control group. MRI clearly depicted the macroscopic findings. The histological study showed that repair of the cauterized area with myofibrous tissue was significantly better in the MSC M+ group than that in either the MSC M-group or control group, although there was no significant difference in several mRNA cytokines among the three groups at 14 days after surgery. Conclusions The magnetic delivery of MSCs shows promise as an effective, minimally invasive method of enhancing tissue regeneration after TURBT.
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Key Words
- BC, urinary bladder cancer
- Bone marrow
- Cancer
- FA, flip angle
- FBS, fetal bovine serum
- H&E, hematoxylin and eosin
- MRI, Magnetic resonance imaging
- MSC, mesenchymal stem cell
- Mesenchymal stem cell
- NEX, number of excitations
- NMIBC, non-muscle invasive urinary bladder cancer
- PBS, phosphate-buffered saline
- PCR, polymerase chain reaction
- Regeneration
- SPION, superparamagnetic iron oxide nanoparticle
- TE, echo time
- TR, repetition time
- TURBT, transurethral resection of bladder tumor
- Transurethral resection
- Urinary bladder
- αSMA, α-smooth muscle actin
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Affiliation(s)
- Kosuke Sadahide
- Department of Urology, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
- Corresponding author.
| | - Jun Teishima
- Department of Urology, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shogo Inoue
- Department of Urology, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takayuki Tamura
- Department of Radiology, Hiroshima University Hospital, Hiroshima, Japan
| | - Naosuke Kamei
- Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
- Medical Center for Translational & Clinical Research, Hiroshima University Hospital, Hiroshima, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Akio Matsubara
- Department of Urology, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
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Hofmeier B, Wolpert S, Aldamer ES, Walter M, Thiericke J, Braun C, Zelle D, Rüttiger L, Klose U, Knipper M. Reduced sound-evoked and resting-state BOLD fMRI connectivity in tinnitus. Neuroimage Clin 2018; 20:637-649. [PMID: 30202725 PMCID: PMC6128096 DOI: 10.1016/j.nicl.2018.08.029] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/29/2018] [Accepted: 08/30/2018] [Indexed: 01/02/2023]
Abstract
The exact neurophysiological basis of chronic tinnitus, which affects 10-15% of the population, remains unknown and is controversial at many levels. It is an open question whether phantom sound perception results from increased central neural gain or not, a crucial question for any future therapeutic intervention strategies for tinnitus. We performed a comprehensive study of mild hearing-impaired participants with and without tinnitus, excluding participants with co-occurrences of hyperacusis. A right-hemisphere correlation between tinnitus loudness and auditory perceptual difficulty was observed in the tinnitus group, independent of differences in hearing thresholds. This correlation was linked to reduced and delayed sound-induced suprathreshold auditory brain responses (ABR wave V) in the tinnitus group, suggesting subsided rather than exaggerated central neural responsiveness. When anatomically predefined auditory regions of interest were analysed for altered sound-evoked BOLD fMRI activity, it became evident that subcortical and cortical auditory regions and regions involved in sound detection (posterior insula, hippocampus), responded with reduced BOLD activity in the tinnitus group, emphasizing reduced, rather than increased, central neural gain. Regarding previous findings of evoked BOLD activity being linked to positive connectivities at rest, we additionally analysed r-fcMRI responses in anatomically predefined auditory regions and regions associated with sound detection. A profound reduction in positive interhemispheric connections of homologous auditory brain regions and a decline in the positive connectivities between lower auditory brainstem regions and regions involved in sound detection (hippocampus, posterior insula) were observed in the tinnitus group. The finding went hand-in-hand with the emotional (amygdala, anterior insula) and temporofrontal/stress-regulating regions (prefrontal cortex, inferior frontal gyrus) that were no longer positively connected with auditory cortex regions in the tinnitus group but were instead positively connected to lower-level auditory brainstem regions. Delayed sound processing, reduced sound-evoked BOLD fMRI activity and altered r-fcMRI in the auditory midbrain correlated in the tinnitus group and showed right hemisphere dominance as did tinnitus loudness and perceptual difficulty. The findings suggest that reduced central neural gain in the auditory stream may lead to phantom perception through a failure to energize attentional/stress-regulating networks for contextualization of auditory-specific information. Reduced auditory-specific information flow in tinnitus has until now escaped detection in humans, as low-level auditory brain regions were previously omitted from neuroimaging studies. TRIAL REGISTRATION German Clinical Trials Register DRKS0006332.
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Key Words
- ABR wave
- ABR, auditory brainstem response
- BA, Brodmann area
- BA13A, anterior insula
- BA13P, posterior insula
- BA28, entorhinal cortex
- BB-chirp, broadband chirp
- BERA, brainstem-evoked response audiometry
- CN, cochlear nucleus
- CSF, cerebrospinal fluid
- Cortisol
- DL, dorsolateral
- EFR, envelope-followed responses
- ENT, ear, nose and throat
- FA, flip angle
- FDR, false discovery rate
- FOV, field of view
- FWHM, full width at half maximum
- G-H-S, Goebel-Hiller-Score
- HF-chirp, high-frequency chirp
- HPA, hypothalamic-pituitary-adrenal
- High-SR AF, high-spontaneous firing rates auditory fibers
- IC, inferior colliculus
- L, left
- LF-chirp, low-frequency chirp
- Low-SR AF, low-spontaneous firing rates auditory fibers
- M, medial
- MGB, medial geniculate body
- MNI, Montreal Neurological Institute
- PFC, prefrontal cortex
- PTA, pure tone audiogram
- R, right
- ROI, region of interest
- SD, standard deviation
- SOC, superior olivary complex
- SPL, sound pressure level
- SPM, Statistical Parametric Mapping
- TA, acquisition time
- TE, echo time
- TR, repetition time
- Tinnitus
- VBM, voxel-based morphometry
- fMRI
- r-fcMRI
- rCBF, resting-state cerebral blood flow
- rCBV, resting-state cerebral blood volume
- zFC, z-values functional connectivity
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Affiliation(s)
- Benedikt Hofmeier
- Department of Otolaryngology, Head and Neck Surgery, Hearing Research Center Tübingen, Molecular Physiology of Hearing, University of Tübingen, Elfriede-Aulhorn-Str. 5, D-72076 Tübingen, Germany
| | - Stephan Wolpert
- Department of Otolaryngology, Head and Neck Surgery, Hearing Research Center Tübingen, Molecular Physiology of Hearing, University of Tübingen, Elfriede-Aulhorn-Str. 5, D-72076 Tübingen, Germany
| | - Ebrahim Saad Aldamer
- Department of Otolaryngology, Head and Neck Surgery, Hearing Research Center Tübingen, Molecular Physiology of Hearing, University of Tübingen, Elfriede-Aulhorn-Str. 5, D-72076 Tübingen, Germany
| | - Moritz Walter
- Department of Otolaryngology, Head and Neck Surgery, Hearing Research Center Tübingen, Molecular Physiology of Hearing, University of Tübingen, Elfriede-Aulhorn-Str. 5, D-72076 Tübingen, Germany
| | - John Thiericke
- Department of Otolaryngology, Head and Neck Surgery, Hearing Research Center Tübingen, Molecular Physiology of Hearing, University of Tübingen, Elfriede-Aulhorn-Str. 5, D-72076 Tübingen, Germany/HNO Ärzte Praxis Part GmbB, Aschaffenburg, Germany
| | - Christoph Braun
- MEG Center, University Hospital Tübingen, Otfried-Müller-Str. 47, D-72076 Tübingen, Germany
| | - Dennis Zelle
- Section of Physiological Acoustics and Communication, Department of Otolaryngology, Head and Neck Surgery, University of Tübingen, Elfriede-Aulhorn-Str. 5, D-72076 Tübingen, Germany
| | - Lukas Rüttiger
- Department of Otolaryngology, Head and Neck Surgery, Hearing Research Center Tübingen, Molecular Physiology of Hearing, University of Tübingen, Elfriede-Aulhorn-Str. 5, D-72076 Tübingen, Germany
| | - Uwe Klose
- Department of Diagnostic and Interventional Neuroradiology, University Hospital Tübingen, Hoppe-Seyler-Str. 3, D-73076 Tübingen, Germany.
| | - Marlies Knipper
- Department of Otolaryngology, Head and Neck Surgery, Hearing Research Center Tübingen, Molecular Physiology of Hearing, University of Tübingen, Elfriede-Aulhorn-Str. 5, D-72076 Tübingen, Germany.
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Abstract
Prader-Willi syndrome (PWS) is a neurodevelopmental disorder of genomic imprinting, presenting with a characteristic overeating disorder, mild to moderate intellectual disability, and a variable range of social and behavioral difficulties. Consequently, widespread alterations in neural structure and developmental and maturational trajectory would be expected. To date, there have been few quantitative and systematic studies of brain morphology in PWS, although alterations of volume and of cortical organisation have been reported. This study aimed to investigate, in detail, the structure of grey matter and cortex in the brain in a sample of young adults with PWS in a well-matched case-controlled analysis. 20 young adults with PWS, aged 19–27 years, underwent multiparameter mapping magnetic resonance imaging sequences, from which measures of grey matter volume, cortical thickness and magnetisation transfer saturation, as a proxy measure of myelination, were examined. These variables were investigated in comparison to a control group of 40 typically developing young adults, matched for age and sex. A voxel-based morphometry analysis identified large and widespread bilateral clusters of both increased and decreased grey matter volume in the brain in PWS. In particular, widespread areas of increased volume encompassed parts of the prefrontal cortex, especially medially, the majority of the cingulate cortices, from anterior to posterior aspects, insula cortices, and areas of the parietal and temporal cortices. Increased volume was also reported in the caudate, putamen and thalamus. The most ventromedial prefrontal areas, in contrast, showed reduced volume, as did the parts of the medial temporal lobe, bilateral temporal poles, and a small cluster in the right lateral prefrontal cortex. Analysis of cortical structure revealed that areas of increased volume in the PWS group were largely driven by greater cortical thickness. Conversely, analysis of myelin content using magnetisation transfer saturation indicated that myelination of the cortex was broadly similar in the PWS and control groups, with the exception of highly localised areas, including the insula. The bilateral nature of these abnormalities suggests a systemic biological cause, with possible developmental and maturational mechanisms discussed, and may offer insight into the contribution of imprinted genes to neural development. Twenty young adults with PWS and forty age and sex-matched control participants underwent multiparameter mapping MRI. Large and widespread bilateral clusters of both increased and decreased grey matter volume were identified in PWS. Volumetric increases in PWS were largely driven by greater cortical thickness. Myelination of the cortex in PWS was broadly similar to the typically-developing control group. Potential developmental and maturational explanations are considered, including insights into the of the role of imprinted genes.
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Key Words
- ACC, anterior cingulate cortex
- ANTS, Advanced Normalisation Tools Software
- BMI, body mass index
- CamBA, Cambridge Brain Analysis software
- Cortical thickness
- FA, flip angle
- GLM, general linear model
- GM, grey matter
- Genomic imprinting
- Grey matter
- IQ, intelligence quotient
- MPM, multiparameter mapping
- MRI, magnetic resonance imaging
- MT, magnetisation transfer
- Multiparameter mapping
- Myelination
- NHS, National Health Service
- NSPN, NeuroScience in Psychiatry Network
- OFC, orbitofrontal cortex
- PD, proton density
- PFC, prefrontal cortex
- PWS, Prader-Willi syndrome
- PWSA UK, Prader-Willi Syndrome Association UK
- Prader-Willi syndrome
- TE, echo time
- TIV, total intracranial volume
- TR, repetition time
- UPD, uniparental disomy
- WM, white matter
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Affiliation(s)
| | - Roger Tait
- Department of Psychiatry, University of Cambridge, Cambridge, UK
| | - John Suckling
- Department of Psychiatry, University of Cambridge, Cambridge, UK
| | - Anthony J Holland
- Department of Psychiatry, University of Cambridge, Cambridge, UK; Cambridgeshire and Peterborough NHS Foundation Trust, UK; National Institute for Health Research (NIHR) Collaborations for Leadership in Applied Health Care Research and Care (CLAHRC), East of England, UK
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8
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Kleijwegt MC, van der Mey AGL, Wiggers-deBruine FT, Malessy MJA, van Osch MJP. Perfusion magnetic resonance imaging provides additional information as compared to anatomical imaging for decision-making in vestibular schwannoma. Eur J Radiol Open 2016; 3:127-33. [PMID: 27366777 PMCID: PMC4919314 DOI: 10.1016/j.ejro.2016.05.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 05/31/2016] [Indexed: 11/26/2022] Open
Abstract
DSC/ASL-MRI can be acquired in growing VS with sufficient image quality. In most patients DSC and ASL techniques provide similar qualitative scores. These techniques can be of importance in future decision-making.
Objective The added value of perfusion MRI for decision-making in vestibular schwannoma (VS) patients is unknown. MRI offers two perfusion methods: the first employing contrast agent (dynamic susceptibility contrast (DSC)-MRI) that provides information on cerebral blood volume (CBV) and cerebral blood flow (CBF), the second by magnetic labeling of blood (arterial spin labeling (ASL)-MRI), providing CBF-images. The goal of the current study is to investigate whether DSC and ASL perfusion MRI provides complimentary information to current anatomical imaging in treatment selection process of VS. Methods Nine patients with growing VS with extrameatal diameter >9 mm were included (>2 mm/year and 20% volume expansion/year) and one patient with 23 mm extrameatal VS without growth. DSC and ASL perfusion MRI were obtained on 3 T MRI. Perfusion in VS was scored as hyperintense, hypointense or isointense compared to the contralateral region. Results Seven patients showed hyperintense signal on DSC and ASL sequences. Three patients showed iso- or hypointense signal on at least one perfusion map (1 patient hypointense on both DSC-MRI and ASL; 1 patient isointense on DSC-CBF; 1 patient isointense on ASL). All patients showed enhancement on post-contrast T1 anatomical scan. Conclusion Perfusion MR provides additional information compared to anatomical imaging for decision-making in VS.
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Key Words
- AAO-HNS, American Academy of Otolaryngology-Head and Neck Surgery
- ASL, arterial spin labeling
- CA, contrast agent
- CBF, cerebral blood flow
- CBV, cerebral blood volume
- DSC, dynamic susceptibility contrast
- Decision making
- Dynamic susceptibility contrast (DSC) and arterial spin labeling (ASL)
- EPI, echo planar imaging
- FA, flip angle
- FOV, field of view
- Gd, gadolinium
- MR, magnetic resonance
- MRI, magnetic resonance imaging
- PCASL, pseudo-continuous arterial spin labeling
- Perfusion weighted MR
- RF, radiofrequency
- SNR, signal to noise ratio
- TE, echo time
- TR, repetition time
- VS, vestibular schwannoma
- Vestibular schwannoma
- rCBV, relative CBV
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Affiliation(s)
- M C Kleijwegt
- ENT Department, Leiden University Medical Center, Leiden, The Netherlands
| | - A G L van der Mey
- ENT Department, Leiden University Medical Center, Leiden, The Netherlands
| | | | - M J A Malessy
- Neurosurgery Department, Leiden University Medical Center, Leiden, The Netherlands
| | - M J P van Osch
- C.J. Gorter Center for High Field MRI, Radiology Department, Leiden University Medical Center, Leiden, The Netherlands
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9
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Chaumeil MM, Radoul M, Najac C, Eriksson P, Viswanath P, Blough MD, Chesnelong C, Luchman HA, Cairncross JG, Ronen SM. Hyperpolarized (13)C MR imaging detects no lactate production in mutant IDH1 gliomas: Implications for diagnosis and response monitoring. Neuroimage Clin 2016; 12:180-9. [PMID: 27437179 PMCID: PMC4939422 DOI: 10.1016/j.nicl.2016.06.018] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 06/21/2016] [Accepted: 06/22/2016] [Indexed: 10/26/2022]
Abstract
Metabolic imaging of brain tumors using (13)C Magnetic Resonance Spectroscopy (MRS) of hyperpolarized [1-(13)C] pyruvate is a promising neuroimaging strategy which, after a decade of preclinical success in glioblastoma (GBM) models, is now entering clinical trials in multiple centers. Typically, the presence of GBM has been associated with elevated hyperpolarized [1-(13)C] lactate produced from [1-(13)C] pyruvate, and response to therapy has been associated with a drop in hyperpolarized [1-(13)C] lactate. However, to date, lower grade gliomas had not been investigated using this approach. The most prevalent mutation in lower grade gliomas is the isocitrate dehydrogenase 1 (IDH1) mutation, which, in addition to initiating tumor development, also induces metabolic reprogramming. In particular, mutant IDH1 gliomas are associated with low levels of lactate dehydrogenase A (LDHA) and monocarboxylate transporters 1 and 4 (MCT1, MCT4), three proteins involved in pyruvate metabolism to lactate. We therefore investigated the potential of (13)C MRS of hyperpolarized [1-(13)C] pyruvate for detection of mutant IDH1 gliomas and for monitoring of their therapeutic response. We studied patient-derived mutant IDH1 glioma cells that underexpress LDHA, MCT1 and MCT4, and wild-type IDH1 GBM cells that express high levels of these proteins. Mutant IDH1 cells and tumors produced significantly less hyperpolarized [1-(13)C] lactate compared to GBM, consistent with their metabolic reprogramming. Furthermore, hyperpolarized [1-(13)C] lactate production was not affected by chemotherapeutic treatment with temozolomide (TMZ) in mutant IDH1 tumors, in contrast to previous reports in GBM. Our results demonstrate the unusual metabolic imaging profile of mutant IDH1 gliomas, which, when combined with other clinically available imaging methods, could be used to detect the presence of the IDH1 mutation in vivo.
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Key Words
- 2-HG, 2-hydroxyglutarate
- AIF, arterial input function
- AUC, area under the curve
- DNP, dynamic nuclear polarization
- DNP-MR, dynamic nuclear polarization magnetic resonance
- EGF, epidermal growth factor
- EGFR, epidermal growth factor receptor
- FA, flip angle
- FGF, fibroblast growth factor
- FLAIR, fluid attenuated inversion recovery
- FOV, field of view
- GBM, glioblastoma
- Glioma
- Hyperpolarized 13C Magnetic Resonance Spectroscopy (MRS)
- IDH1, isocitrate dehydrogenase 1
- Isocitrate dehydrogenase 1 (IDH1) mutation
- LDHA, lactate dehydrogenase A
- MCT1, monocarboxylate transporter 1
- MCT4, monocarboxylate transporter 4
- MR, magnetic resonance
- MRI, magnetic resonance imaging
- MRS, magnetic resonance spectroscopic imaging
- MRS, magnetic resonance spectroscopy
- Metabolic reprogramming
- NA, number of averages
- NT, number of transients
- PBS, phosphate-buffer saline
- PDGF, platelet-derived growth factor
- PET, positron emission tomography
- PI3K, phosphoinositide 3-kinase
- PTEN, phosphatase and tensin homolog
- RB1, retinoblastoma protein 1
- SLC16A1, solute carrier family 16 member 1
- SLC16A3, solute carrier family 16 member 3
- SNR, signal-to-noise ratio
- SW, spectral width
- TCGA, The Cancer Genome Atlas
- TE, echo time
- TMZ, temozolomide
- TP53, tumor protein p53
- TR, repetition time
- Tacq, acquisition time
- VOI, voxel of interest
- mTOR, mammalian target of rapamycin
- α-KG, α-ketoglutarate
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Affiliation(s)
- Myriam M. Chaumeil
- Department of Radiology and Biomedical Imaging, Mission Bay Campus, 1700 4th Street, Byers Hall, University of California, 94158 San Francisco, CA, United States
| | - Marina Radoul
- Department of Radiology and Biomedical Imaging, Mission Bay Campus, 1700 4th Street, Byers Hall, University of California, 94158 San Francisco, CA, United States
| | - Chloé Najac
- Department of Radiology and Biomedical Imaging, Mission Bay Campus, 1700 4th Street, Byers Hall, University of California, 94158 San Francisco, CA, United States
| | - Pia Eriksson
- Department of Radiology and Biomedical Imaging, Mission Bay Campus, 1700 4th Street, Byers Hall, University of California, 94158 San Francisco, CA, United States
| | - Pavithra Viswanath
- Department of Radiology and Biomedical Imaging, Mission Bay Campus, 1700 4th Street, Byers Hall, University of California, 94158 San Francisco, CA, United States
| | - Michael D. Blough
- Department of Clinical Neurosciences, Foothills Hospital, 1403 29 St NW, Calgary, AB T2N 2T9, Canada
| | - Charles Chesnelong
- Department of Clinical Neurosciences, Foothills Hospital, 1403 29 St NW, Calgary, AB T2N 2T9, Canada
| | - H. Artee Luchman
- Department of Clinical Neurosciences, Foothills Hospital, 1403 29 St NW, Calgary, AB T2N 2T9, Canada
| | - J. Gregory Cairncross
- Department of Clinical Neurosciences, Foothills Hospital, 1403 29 St NW, Calgary, AB T2N 2T9, Canada
| | - Sabrina M. Ronen
- Department of Radiology and Biomedical Imaging, Mission Bay Campus, 1700 4th Street, Byers Hall, University of California, 94158 San Francisco, CA, United States
- Brain Tumor Research Center, Helen Diller Family Cancer Research Building, 1450 3rd Street, University of California, 94158 San Francisco, CA, United States
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Gupta A, Mayer EA, Sanmiguel CP, Van Horn JD, Woodworth D, Ellingson BM, Fling C, Love A, Tillisch K, Labus JS. Patterns of brain structural connectivity differentiate normal weight from overweight subjects. Neuroimage Clin 2015; 7:506-17. [PMID: 25737959 PMCID: PMC4338207 DOI: 10.1016/j.nicl.2015.01.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Background Alterations in the hedonic component of ingestive behaviors have been implicated as a possible risk factor in the pathophysiology of overweight and obese individuals. Neuroimaging evidence from individuals with increasing body mass index suggests structural, functional, and neurochemical alterations in the extended reward network and associated networks. Aim To apply a multivariate pattern analysis to distinguish normal weight and overweight subjects based on gray and white-matter measurements. Methods Structural images (N = 120, overweight N = 63) and diffusion tensor images (DTI) (N = 60, overweight N = 30) were obtained from healthy control subjects. For the total sample the mean age for the overweight group (females = 32, males = 31) was 28.77 years (SD = 9.76) and for the normal weight group (females = 32, males = 25) was 27.13 years (SD = 9.62). Regional segmentation and parcellation of the brain images was performed using Freesurfer. Deterministic tractography was performed to measure the normalized fiber density between regions. A multivariate pattern analysis approach was used to examine whether brain measures can distinguish overweight from normal weight individuals. Results 1. White-matter classification: The classification algorithm, based on 2 signatures with 17 regional connections, achieved 97% accuracy in discriminating overweight individuals from normal weight individuals. For both brain signatures, greater connectivity as indexed by increased fiber density was observed in overweight compared to normal weight between the reward network regions and regions of the executive control, emotional arousal, and somatosensory networks. In contrast, the opposite pattern (decreased fiber density) was found between ventromedial prefrontal cortex and the anterior insula, and between thalamus and executive control network regions. 2. Gray-matter classification: The classification algorithm, based on 2 signatures with 42 morphological features, achieved 69% accuracy in discriminating overweight from normal weight. In both brain signatures regions of the reward, salience, executive control and emotional arousal networks were associated with lower morphological values in overweight individuals compared to normal weight individuals, while the opposite pattern was seen for regions of the somatosensory network. Conclusions 1. An increased BMI (i.e., overweight subjects) is associated with distinct changes in gray-matter and fiber density of the brain. 2. Classification algorithms based on white-matter connectivity involving regions of the reward and associated networks can identify specific targets for mechanistic studies and future drug development aimed at abnormal ingestive behavior and in overweight/obesity. Multivariate analysis can be used to classify overweight from normal weight individuals. Anatomical connectivity achieved 97% accuracy in the classification algorithm. Greater connectivity was observed in extended reward and somatosensory regions. Morphological gray-matter achieved 69% accuracy in the classification algorithm. Lower morphological values were observed in regions of the extended reward network.
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Key Words
- ACC, anterior cingulate cortex
- ANOVA, analysis of variance
- Anatomical white-matter connectivity
- BMI, body mass index
- CT, cortical thickness
- Classification algorithm
- DTI, diffusion tensor imaging
- DWI, diffusion-weighted MRIs
- FA, flip angle
- FACT, fiber assignment by continuous tracking
- FDR, false-discovery rate
- FOV, field of view
- GLM, general linear model
- GMV, gray matter volume
- HAD, hospital anxiety and Depression Scale
- HC, healthy control
- MC, mean curvature
- Morphological gray-matter
- Multivariate analysis
- NPV, negative predictive value
- OFG, orbitofrontal gyrus
- Obesity
- Overweight
- PPC, posterior parietal cortex
- PPV, positive predictive value
- Reward network
- SA, surface area
- SPSS, statistical package for the social sciences
- TE, echo time
- TR, repetition time
- VIP, variable importance in projection
- VTA, ventral tegmental area
- aMCC, anterior mid cingulate cortex
- dlPFC, dorsolateral prefrontal cortex
- sPLS-DA, sparse partial least squares for discrimination Analysis
- sgACC, subgenual anterior cingulate cortex
- vmPFC, ventromedial prefrontal cortex
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Affiliation(s)
- Arpana Gupta
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA ; David Geffen School of Medicine, UCLA, Los Angeles, CA, USA ; Division of Digestive Diseases, UCLA, Los Angeles, CA, USA
| | - Emeran A Mayer
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA ; David Geffen School of Medicine, UCLA, Los Angeles, CA, USA ; Division of Digestive Diseases, UCLA, Los Angeles, CA, USA ; Ahmanson-Lovelace Brain Mapping Center, UCLA, Los Angeles, CA, USA
| | - Claudia P Sanmiguel
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA ; David Geffen School of Medicine, UCLA, Los Angeles, CA, USA ; Division of Digestive Diseases, UCLA, Los Angeles, CA, USA
| | - John D Van Horn
- The Institute for Neuroimaging and Informatics, Keck School of Medicine, USC, Los Angeles, CA, USA
| | - Davis Woodworth
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA ; Radiology, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - Benjamin M Ellingson
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA ; Radiology, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - Connor Fling
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA
| | - Aubrey Love
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA
| | - Kirsten Tillisch
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA ; David Geffen School of Medicine, UCLA, Los Angeles, CA, USA ; Division of Digestive Diseases, UCLA, Los Angeles, CA, USA ; Integrative Medicine, GLA VHA, UCLA, Los Angeles, CA, USA
| | - Jennifer S Labus
- Gail and Gerald Oppenheimer Family Center for Neurobiology of Stress, Ingestive Behavior and Obesity Program (IBOP), UCLA, Los Angeles, CA, USA ; David Geffen School of Medicine, UCLA, Los Angeles, CA, USA ; Division of Digestive Diseases, UCLA, Los Angeles, CA, USA
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11
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Norén B, Dahlström N, Forsgren MF, Dahlqvist Leinhard O, Kechagias S, Almer S, Wirell S, Smedby Ö, Lundberg P. Visual assessment of biliary excretion of Gd-EOB-DTPA in patients with suspected diffuse liver disease - A biopsy-verified prospective study. Eur J Radiol Open 2015; 2:19-25. [PMID: 26937432 DOI: 10.1016/j.ejro.2014.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Accepted: 12/31/2014] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVES To qualitatively evaluate late dynamic contrast phases, 10, 20 and 30 min, after administration of Gd-EOB-DTPA with regard to biliary excretion in patients presenting with elevated liver enzymes without clinical signs of cirrhosis or hepatic decompensation and to compare the visual assessment of contrast agent excretion with histo-pathological fibrosis stage, contrast uptake parameters and blood tests. METHODS 29 patients were prospectively examined using 1.5 T MRI. The visually assessed presence or absence of contrast agent for each of five anatomical regions in randomly reviewed time-series was summarized on a four grade scale for each patient. The scores, including a total visual score, were related to the histo-pathological findings, the quantitative contrast agent uptake parameters, expressed as K Hep or LSC_N, and blood tests. RESULTS No relationship between the fibrosis grade or contrast uptake parameters could be established. A negative correlation between the visual assessment and alkaline phosphatase (ALP) was found. Comparing a sub-group of cholestatic patients with fibrosis score and Gd-EOB-DTPA dynamic parameters did not add any additional significant correlation. CONCLUSIONS No correlation between visually assessed biliary excretion of Gd-EOB-DTPA and histo-pathological or contrast uptake parameters was found. A negative correlation between the visual assessment and alkaline phosphatase (ALP) was found.
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Key Words
- AAT deficiency, α1-antitrypsin deficiency
- AIH, autoimmune hepatitis
- ALP, alkaline phosphatase
- ALT, alanine aminotransferase
- AUROC, area under the receiver operating characteristic curve
- Bile
- CLD, chronic liver disease
- DCE-MRI, Dynamic Contrast Enhanced Magnetic Resonance Imaging
- DILI, drug induced liver injury
- Dynamic contrast enhanced MRI
- Excretion
- FA, flip angle
- Gd-EOB-DTPA
- Gd-EOB-DTPA, gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid
- HCV, hepatitis C
- KHep, contrast uptake rate
- LSC_N, normalised liver-to-spleen contrast ratio
- Liver
- MANA, multi scale adaptive normalizing averaging
- MRP, multidrug resistance protein
- NAFLD, non-alcoholic fatty liver disease
- OATP, organic anion transporting polypeptides
- PSC, primary sclerosing cholangitis
- RE, relative enhancement
- SNR, signal to noise ratio
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12
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Shigenaga Y, Kiuchi K, Okajima K, Ikeuchi K, Ikeda T, Shimane A, Yokoi K, Teranishi J, Aoki K, Chimura M, Masai H, Yamada S, Taniguchi Y, Yasaka Y, Kawai H. Acquisition of the pulmonary venous and left atrial anatomy with non-contrast-enhanced MRI for catheter ablation of atrial fibrillation: Usefulness of two-dimensional balanced steady-state free precession. J Arrhythm 2014; 31:189-95. [PMID: 26336558 DOI: 10.1016/j.joa.2014.11.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 11/14/2014] [Accepted: 11/21/2014] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Usually, the pulmonary venous and left atrial (PV-LA) anatomy is assessed with contrast-enhanced computed tomographic imaging for catheter ablation of atrial fibrillation (AF). A non-contrast-enhanced magnetic resonance (MR) imaging method has not been established. Three-dimensional balanced steady-state free precession (3D b-SSFP) sequences cannot visualize the PV-LA anatomy simultaneously because of the signal intensity defect of pulmonary veins. We compared two-dimensional (2D) b-SSFP sequences with 3D b-SSFP sequences in depicting the PV-LA anatomy with non-contrast-enhanced MR imaging for AF ablation. METHODS Eleven healthy volunteers underwent non-contrast-enhanced MR imaging with 3D b-SSFP and 2D b-SSFP sequences. The MR images were reconstructed on the 3D PV-LA surface image. Two experienced radiological technicians independently scored the multiplanar reformatted (MPR) images on a scale of 1-4 (from 1, not visualized, to 4, excellent definition). The overall score was a sum of 5 segments (LA and 4 PVs). RESULTS In the 2D b-SSFP method, MR imaging was successfully performed, and the 3D PV-LA surface image was precisely reconstructed in all healthy volunteers. The image score was significantly higher in the 2D b-SSFP method compared to the 3D b-SSFP method (19 [19; 20] vs. 12 [11; 15], p=0.004, for both observers). No PV signal intensity defects occurred in the 2D b-SSFP method. CONCLUSIONS The 2D b-SSFP sequence was more useful than the 3D b-SSFP sequence in adequately depicting the PV-LA anatomy.
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Key Words
- 3D, three-dimensional
- AF, atrial fibrillation
- Atrial fibrillation
- Balanced SSFP
- CT, computed tomography
- FA, flip angle
- FOV, field of view
- LAA, left atrial appendage
- LSPV, left superior pulmonary vein
- Left atrium
- MPR, multiplanar reformatted
- MR, magnetic resonance
- Magnetic resonance imaging
- PV–LA, pulmonary venous and left atrial
- Pulmonary vein
- SENSE, sensitivity encoding
- TE, echo time
- TR, repetition time
- b-SSFP, balanced steady-state free precession
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Affiliation(s)
- Yutaka Shigenaga
- Department of Radiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Kunihiko Kiuchi
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Katsunori Okajima
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Kazushi Ikeuchi
- Department of Radiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Takayuki Ikeda
- Department of Radiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Akira Shimane
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Kiminobu Yokoi
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Jin Teranishi
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Kousuke Aoki
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Misato Chimura
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Hideyuki Masai
- Department of Radiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Shinichiro Yamada
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Yasuyo Taniguchi
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Yoshinori Yasaka
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
| | - Hiroya Kawai
- Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan
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