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Bajaj S, Chhabra A, Taneja AK. 3D isotropic MRI of ankle: review of literature with comparison to 2D MRI. Skeletal Radiol 2024; 53:825-846. [PMID: 37978990 DOI: 10.1007/s00256-023-04513-2] [Citation(s) in RCA: 1] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/01/2023] [Accepted: 11/06/2023] [Indexed: 11/19/2023]
Abstract
The ankle joint has complex anatomy with different tissue structures and is commonly involved in traumatic injuries. Magnetic resonance imaging (MRI) is the primary imaging modality used to assess the soft tissue structures around the ankle joint including the ligaments, tendons, and articular cartilage. Two-dimensional (2D) fast spin echo/turbo spin echo (FSE/TSE) sequences are routinely used for ankle joint imaging. While the 2D sequences provide a good signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) with high spatial resolution, there are some limitations to their use owing to the thick slices, interslice gaps leading to partial volume effects, limited fluid contrast, and the need to acquire separate images in different orthogonal planes. The 3D MR imaging can overcome these limitations and recent advances have led to technical improvements that enable its widespread clinical use in acceptable time periods. The volume imaging renders the advantage of reconstructing into thin continuous slices with isotropic voxels enabling multiplanar reconstructions that helps in visualizing complex anatomy of the structure of interest throughout their course with improved sharpness, definition of anatomic variants, and fluid conspicuity of lesions and injuries. Recent advances have also reduced the acquisition time of the 3D datasets making it more efficient than 2D sequences. This article reviews the recent technical developments in the domain 3D MRI, compares imaging with 3D versus 2D sequences, and demonstrates the use-case scenarios with interesting cases, and benefits of 3D MRI in evaluating various ankle joint components and their lesions.
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Affiliation(s)
- Suryansh Bajaj
- Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Avneesh Chhabra
- Musculoskeletal Radiology Division, Department of Radiology, UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA
- Department of Orthopaedic Surgery, UT Southwestern Medical Center, Dallas, TX, USA
- Johns Hopkins University, Baltimore, MD, USA
- Walton Center of Neurosciences, Liverpool, UK
- University of Dallas, Richardson, TX, USA
| | - Atul Kumar Taneja
- Musculoskeletal Radiology Division, Department of Radiology, UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA.
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Liu G, Li Y, Jiang S, Lu W, Yacoub Hassan MH, Essien AE, Pavel V, Xiao W, Huang C. Accuracy and Consistency of 3D Magnetic Resonance Imaging Is Comparable to 3D Computed Tomography in Assessing Glenohumeral Instability: A Systematic Review. Arthroscopy 2024:S0749-8063(24)00266-4. [PMID: 38599537 DOI: 10.1016/j.arthro.2024.03.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 03/23/2024] [Accepted: 03/24/2024] [Indexed: 04/12/2024]
Abstract
PURPOSE The purpose of this study is to compare the accuracy of 3D magnetic resonance imaging (MRI) with that of 3D CT in evaluating glenoid bone loss (GBL). METHODS This review aligned with PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. PubMed, the Cochrane Library, Embase, and Web of Science were obtained from data inception to Aug 28, 2023. The search term "glenoid bone loss" was extracted and analyzed via stringent inclusion and exclusion criteria. The Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) combined with the Quality Assessment of Diagnostic Accuracy Studies-Comparative (QUADAS-C) to assess the heterogeneity of included studies. RESULTS A total of 1589 related studies were retrieved, and 10 studies were finally included, of which a total of 143 shoulders were evaluated. The index test in QUADAS-C was low risk in 9 studies. 3D MRI measurements of GBL were primarily best-fit circles (n = 9). In both clinical and cadaveric studies, the mean percentages of GBL measured by 3D MRI were 0.38% to 2.19% and 0.25% to 6.1% when compared with 3D CT and standard reference values, respectively. ICC agreement greater than 0.9 between GBL percentages measured by 3D CT and 3D MRI. 3D MRI can also accurately measure glenoid width, glenoid height, humeral head width and height, etc. 3D MRI reconstruction time was similar to that of 3D CT, which was mainly 10-15 min. CONCLUSIONS In both clinical and cadaveric studies, compared to 3D CT, 3D MRI is accurate and consistent in assessing glenohumeral bone, especially in measuring GBL, and the reconstruction time of 3D MRI is similar to 3D CT.
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Affiliation(s)
- Gaoming Liu
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha 410011, China
| | - Yusheng Li
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha 410011, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Shide Jiang
- Department of Orthopedics, The Central Hospital of Yongzhou, Yongzhou, 425000, China
| | - Wenhao Lu
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha 410011, China
| | | | - Anko Elijah Essien
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha 410011, China
| | - Volotovski Pavel
- Republican Scientific and Practical Center of Traumatology and Orthopedics, Minsk 220024, Belarus
| | - Wenfeng Xiao
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha 410011, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410011, China.
| | - Cheng Huang
- Department of Orthopaedics, China-Japan Friendship Hospital, Beijing 100029, China.
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Abel F, Lebl DR, Gorgy G, Dalton D, Chazen JL, Lim E, Li Q, Sneag DB, Tan ET. Deep-learning reconstructed lumbar spine 3D MRI for surgical planning: pedicle screw placement and geometric measurements compared to CT. Eur Spine J 2024:10.1007/s00586-023-08123-3. [PMID: 38472429 DOI: 10.1007/s00586-023-08123-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/06/2023] [Accepted: 12/26/2023] [Indexed: 03/14/2024]
Abstract
PURPOSE To test equivalency of deep-learning 3D lumbar spine MRI with "CT-like" contrast to CT for virtual pedicle screw planning and geometric measurements in robotic-navigated spinal surgery. METHODS Between December 2021 and June 2022, 16 patients referred for spinal fusion and decompression surgery with pre-operative CT and 3D MRI were retrospectively assessed. Pedicle screws were virtually placed on lumbar (L1-L5) and sacral (S1) vertebrae by three spine surgeons, and metrics (lateral deviation, axial/sagittal angles) were collected. Vertebral body length/width (VL/VW) and pedicle height/width (PH/PW) were measured at L1-L5 by three radiologists. Analysis included equivalency testing using the 95% confidence interval (CI), a margin of ± 1 mm (± 2.08° for angles), and intra-class correlation coefficients (ICCs). RESULTS Across all vertebral levels, both combined and separately, equivalency between CT and MRI was proven for all pedicle screw metrics and geometric measurements, except for VL at L1 (mean difference: - 0.64 mm; [95%CI - 1.05, - 0.24]), L2 (- 0.65 mm; [95%CI - 1.11, - 0.20]), and L4 (- 0.78 mm; [95%CI - 1.11, - 0.46]). Inter- and intra-rater ICC for screw metrics across all vertebral levels combined ranged from 0.68 to 0.91 and 0.89-0.98 for CT, and from 0.62 to 0.92 and 0.81-0.97 for MRI, respectively. Inter- and intra-rater ICC for geometric measurements ranged from 0.60 to 0.95 and 0.84-0.97 for CT, and 0.61-0.95 and 0.93-0.98 for MRI, respectively. CONCLUSION Deep-learning 3D MRI facilitates equivalent virtual pedicle screw placements and geometric assessments for most lumbar vertebrae, with the exception of vertebral body length at L1, L2, and L4, compared to CT for pre-operative planning in patients considered for robotic-navigated spine surgery.
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Affiliation(s)
- Frederik Abel
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA.
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA.
| | - Darren R Lebl
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA
| | - George Gorgy
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA
| | - David Dalton
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA
| | - J Levi Chazen
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA
| | - Elisha Lim
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA
| | - Qian Li
- Biostatistics Core, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA
| | - Darryl B Sneag
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA
| | - Ek T Tan
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA
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Hossain MB, Shinde RK, Oh S, Kwon KC, Kim N. A Systematic Review and Identification of the Challenges of Deep Learning Techniques for Undersampled Magnetic Resonance Image Reconstruction. Sensors (Basel) 2024; 24:753. [PMID: 38339469 PMCID: PMC10856856 DOI: 10.3390/s24030753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/05/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024]
Abstract
Deep learning (DL) in magnetic resonance imaging (MRI) shows excellent performance in image reconstruction from undersampled k-space data. Artifact-free and high-quality MRI reconstruction is essential for ensuring accurate diagnosis, supporting clinical decision-making, enhancing patient safety, facilitating efficient workflows, and contributing to the validity of research studies and clinical trials. Recently, deep learning has demonstrated several advantages over conventional MRI reconstruction methods. Conventional methods rely on manual feature engineering to capture complex patterns and are usually computationally demanding due to their iterative nature. Conversely, DL methods use neural networks with hundreds of thousands of parameters and automatically learn relevant features and representations directly from the data. Nevertheless, there are some limitations to DL-based techniques concerning MRI reconstruction tasks, such as the need for large, labeled datasets, the possibility of overfitting, and the complexity of model training. Researchers are striving to develop DL models that are more efficient, adaptable, and capable of providing valuable information for medical practitioners. We provide a comprehensive overview of the current developments and clinical uses by focusing on state-of-the-art DL architectures and tools used in MRI reconstruction. This study has three objectives. Our main objective is to describe how various DL designs have changed over time and talk about cutting-edge tactics, including their advantages and disadvantages. Hence, data pre- and post-processing approaches are assessed using publicly available MRI datasets and source codes. Secondly, this work aims to provide an extensive overview of the ongoing research on transformers and deep convolutional neural networks for rapid MRI reconstruction. Thirdly, we discuss several network training strategies, like supervised, unsupervised, transfer learning, and federated learning for rapid and efficient MRI reconstruction. Consequently, this article provides significant resources for future improvement of MRI data pre-processing and fast image reconstruction.
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Affiliation(s)
- Md. Biddut Hossain
- School of Information and Communication Engineering, Chungbuk National University, Cheongju-si 28644, Chungcheongbuk-do, Republic of Korea; (M.B.H.); (R.K.S.)
| | - Rupali Kiran Shinde
- School of Information and Communication Engineering, Chungbuk National University, Cheongju-si 28644, Chungcheongbuk-do, Republic of Korea; (M.B.H.); (R.K.S.)
| | - Sukhoon Oh
- Research Equipment Operation Department, Korea Basic Science Institute, Cheongju-si 28119, Chungcheongbuk-do, Republic of Korea;
| | - Ki-Chul Kwon
- School of Information and Communication Engineering, Chungbuk National University, Cheongju-si 28644, Chungcheongbuk-do, Republic of Korea; (M.B.H.); (R.K.S.)
| | - Nam Kim
- School of Information and Communication Engineering, Chungbuk National University, Cheongju-si 28644, Chungcheongbuk-do, Republic of Korea; (M.B.H.); (R.K.S.)
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Liu L, Rong H, Wu D, Xu H, He Q, Du B, Zhang X, Wei R. Analysis of morphological and quantitative changes in pathological myopia and perioperative changes in posterior scleral reinforcement using three-dimensional magnet resonance imaging. Front Bioeng Biotechnol 2023; 11:1242440. [PMID: 38169632 PMCID: PMC10758413 DOI: 10.3389/fbioe.2023.1242440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 11/30/2023] [Indexed: 01/05/2024] Open
Abstract
Objective: To compare the morphological and quantitative changes in pathological myopia (PM) and the perioperative changes in posterior scleral reinforcement (PSR) using three-dimensional magnetic resonance images (3D MRI). Methods: A total of 49 patients with high myopia (HM; 98 eyes), 15 with pathological myopia (PM; 19 eyes), and 10 without high myopia (NORM; 20 eyes) were recruited between September 2019 and July 2021. The patients underwent measurements of refractive error and axial length, as well as 3D MRI of the eyeball. Python was used to analyze the 3D MRI images, calculate the vitreous volume, establish a topography of the height of the eyeball posterior surface, and calculate the rate of change in height (H). For the PM group undergoing PSR, changes in vitreous volume and the highest point of the eyeball posterior surface in four quadrants (temporal, subtemporal, nasal, and subnasal) were compared before and after PSR. Results: The vitreous volume was smaller in the NORM group compared to the HM and PM groups (p < 0.01). The PM group had a larger volume than the HM group (p < 0.01). The H for the PM group was higher than that of the NORM and HM groups (p < 0.01). After PSR in the PM group, the total vitreous volume, as well as the volume in the subnasal and supratemporal quadrants, decreased (p < 0.05). Additionally, the highest point of the eyeball's posterior surface was generally shifted to the upper nasal side. Finally, the shape and position of the scleral band after PSR were plotted. Conclusion: 3D MRI is capable of a quantitative description of the eyeball morphology in PM and PSR. It allows for precise calculations of changes in vitreous volume and the H of the posterior surface. It also facilitates a meticulous analysis of the specific details of the scleral band following PSR.
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Affiliation(s)
- Lin Liu
- Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Hua Rong
- Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Di Wu
- Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - He Xu
- Department of Radiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Qing He
- Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Bei Du
- Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Xuejun Zhang
- Department of Radiology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Ruihua Wei
- Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
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KUTARA K, KADEKARU S, HISAEDA K, SUGIMOTO K, ONO T, INOUE Y, NAKAMURA S, YOSHITAKE R, OHZAWA E, GOTO A, IWATA E, SHIBANO K, UNE Y, KITAGAWA H. Postmortem magnetic resonance imaging findings of tricuspid atresia with ventricular and atrial septal defects and subvalvular pulmonic stenosis in a Japanese native Noma horse. J Equine Sci 2023; 34:121-125. [PMID: 38274557 PMCID: PMC10806361 DOI: 10.1294/jes.34.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 07/14/2023] [Accepted: 09/01/2023] [Indexed: 01/27/2024] Open
Abstract
The necropsy of a 2-day-old Noma horse that died of weakness showed an enlarged cardiac base and a narrow cardiac apex, suggesting cardiac malformation. The excised heart underwent imaging to investigate its luminal structure. On three-dimensional magnetic resonance imaging, the right atrium and right ventricle were discontinuous. The right atrium communicated with the left atrium and the left ventricle communicated with the right ventricle. The lumen narrowed near the pulmonary artery valve. Since the same findings were observed on gross examination, the foal was diagnosed with tricuspid atresia with ventricular and atrial septal defects, along with subvalvular pulmonic stenosis.
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Affiliation(s)
- Kenji KUTARA
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Sho KADEKARU
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Keiichi HISAEDA
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Keisuke SUGIMOTO
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Tetsushi ONO
- Faculty of Veterinary Medicine, Yamaguchi
University, Yamaguchi 753-8515, Japan
| | - Yoichi INOUE
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Shinichi NAKAMURA
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Ryohei YOSHITAKE
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Emi OHZAWA
- Noma Horse Preservation Society, Ehime 794-0082,
Japan
| | - Akira GOTO
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Eri IWATA
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Kenichi SHIBANO
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Yumi UNE
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
| | - Hitoshi KITAGAWA
- Faculty of Veterinary Medicine, Okayama
University of Science, Ehime 794-8555, Japan
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Lin J, Zhang S, Xin E, Liang M, Yang L, Chen J. Anterior cruciate ligament femoral footprint is oblong-ovate, triangular, or two-tears shaped in healthy young adults: three-dimensional MRI analysis. Knee Surg Sports Traumatol Arthrosc 2023; 31:5514-5523. [PMID: 37828405 DOI: 10.1007/s00167-023-07606-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 09/25/2023] [Indexed: 10/14/2023]
Abstract
PURPOSE This study aimed to evaluate the morphology of the anterior cruciate ligament (ACL) femoral footprint with three-dimensional magnetic resonance imaging (3D MRI) in healthy knees. METHODS Fifty subjects with healthy knees were recruited, utilising 3D-SPACE sequences for ACL evaluation. The ACL was manually segmented, and the shape, size and location of the ACL femoral footprint were evaluated on a reformatted oblique-sagittal plane, which aligned closely with the ACL attachment. Statistical analysis included one-way ANOVA for continuous variables and Fisher's exact test for categorical variables, with a P value < 0.05 considered significant. RESULTS Three types of ACL femoral footprint shape were identified, namely, oblong-ovate (OO) in 33 knees (66%), triangular (Tr) in 12 knees (24%) and two-tears (TT) in 5 knees (10%), with the mean areas being 58, 47 and 68 mm2, respectively. Within group TT, regions with similar sizes but different locations were identified: high tear (TT-H) and low tear (TT-L). Notably, group OO demonstrated a larger notch height index, whilst group TT was characterised by a larger α angle and lateral femoral condyle index. A noticeable variation was observed in the location of the femoral footprint centre across groups, with group TT-L and group Tr showing a more distal position relative to the apex of the deep cartilage. According to the Bernard and Hertel (BH) grid, the ACL femoral footprint centres in group TT-L exhibited a shallower and higher position than other groups. Furthermore, compared to group OO and TT-H, group Tr showed a significantly higher position according to the BH grid. CONCLUSION In this study, the morphology of the ACL femoral footprint in healthy young adults was accurately evaluated using 3D MRI, revealing three distinct shapes: OO, Tr and TT. The different ACL femoral footprint types showed similar areas but markedly different locations. These findings emphasise the necessity of considering both the shape and precise location of the ACL femoral footprint during clinical assessments, which might help surgeons enhance patient-specific surgical plans before ACL reconstruction. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Jinrong Lin
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China
| | - Shurong Zhang
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, 200040, People's Republic of China
| | - Enhui Xin
- Department of Radiology, Huashan Hospital, Fudan University, 12 Wulumuqi Middle Road, Jing'an District, Shanghai, 200040, People's Republic of China
| | - Meng Liang
- Botnar Institute of Musculoskeletal Sciences, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, OX3 7LD, UK
| | - Liqin Yang
- Department of Radiology, Huashan Hospital, Fudan University, 12 Wulumuqi Middle Road, Jing'an District, Shanghai, 200040, People's Republic of China.
| | - Jiwu Chen
- Department of Sports Medicine, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, 100 Haining Road, Hongkou District, Shanghai, 200080, People's Republic of China.
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Abel F, Fiore J, Belanger M, Sneag DB, Lebl DR, Tan ET. Lumbar dorsal root ganglion displacement between supine and prone positions evaluated with 3D MRI. Magn Reson Imaging 2023; 104:29-38. [PMID: 37769881 DOI: 10.1016/j.mri.2023.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 01/16/2023] [Revised: 09/18/2023] [Accepted: 09/25/2023] [Indexed: 10/02/2023]
Abstract
OBJECTIVE Pre-operative lumbar spine MRI is usually acquired with the patient supine, whereas lumbar spine surgery is most commonly performed prone. For MRI to be used reliably and safely for intra-operative navigation for foraminal and extraforaminal decompression, the magnitude of dorsal root ganglion (DRG) displacement between supine and prone positions needs to be understood. METHODS A prospective study of a degenerative lumbar spine cohort of 18 subjects indicated for lumbar spine surgery. Three-dimensional T2-weighted fast spin echo and T1-weighted spoiled gradient echo sequences were acquired at 3 T. Displacement and cross-sectional area (CSA) of the bilateral DRGs at 5 motion levels (L1-2 to L5-S1) were determined via 3D segmentation by 2 independent evaluators. Wilcoxon rank-sum tests without correction for multiple comparison were performed against hypothesized 1-mm absolute displacement and corresponding 24% CSA change. RESULTS DRG mean absolute displacement was <1 mm (p > 0.99, mean = 0.707 mm, 95% confidence interval (CI) = 0.659 to 0.755 mm), with the largest directional displacement in the dorsal-to-ventral direction from supine to prone (mean = 0.141 mm, 95% CI = 0.082 to 0.200 mm). Directional displacements caudal-to-cephalad were 0.087 mm (95% CI = 0.022 to 0.151 mm), and left-right were -0.030 mm (95%CI = -0.059 to -0.001 mm). Mean CSA change was within 24% (p > 0.99, mean = -8.30%, 95% CI = -10.5 to -6.09%). Mean absolute displacement was largest for the L1 (mean = 0.811 mm) and L2 (mean = 0.829 mm) DRGs. CONCLUSIONS Minimal, non-statistically significant soft tissue displacement and morphological area differences were demonstrated between supine and prone positions during 3D lumbar spine MRI.
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Affiliation(s)
- Frederik Abel
- Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, USA; Department of Spine Surgery, Hospital for Special Surgery, New York, NY, USA
| | - Jake Fiore
- Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, USA
| | - Marianne Belanger
- Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, USA
| | - Darryl B Sneag
- Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, USA
| | - Darren R Lebl
- Department of Spine Surgery, Hospital for Special Surgery, New York, NY, USA
| | - Ek T Tan
- Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, USA.
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Thacher RR, Retzky JS, Dekhne MS, Oquendo YA, Greditzer HG. Current Concepts in the Measurement of Glenohumeral Bone Loss. Curr Rev Musculoskelet Med 2023; 16:419-431. [PMID: 37341857 PMCID: PMC10427601 DOI: 10.1007/s12178-023-09852-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/09/2023] [Indexed: 06/22/2023]
Abstract
PURPOSE The extent of glenohumeral bone loss seen in anterior shoulder dislocations plays a major role in guiding surgical management of these patients. The need for accurate and reliable preoperative assessment of bone loss on imaging studies is therefore of paramount importance to orthopedic surgeons. This article will focus on the tools that are available to clinicians for quantifying glenoid bone loss with a focus on emerging trends and research in order to describe current practices. RECENT FINDINGS Recent evidence supports the use of 3D CT as the most optimal method for quantifying bone loss on the glenoid and humerus. New trends in the use of 3D and ZTE MRI represent exciting alternatives to CT imaging, although they are not widely used and require further investigation. Contemporary thinking surrounding the glenoid track concept and the symbiotic relationship between glenoid and humeral bone loss on shoulder stability has transformed our understanding of these lesions and has inspired a new focus of study for radiologists and orthopedist alike. Although a number of different advanced imaging modalities are utilized to detect and quantify glenohumeral bone loss in practice, the current literature supports 3D CT imaging to provide the most reliable and accurate assessments. The emergence of the glenoid track concept for glenoid and humeral head bone loss has inspired a new area of study for researchers that presents exciting opportunities for the development of a deeper understanding of glenohumeral instability in the future. Ultimately, however, the heterogeneity of literature, which speaks to the diverse practices that exist across the world, limits any firm conclusions from being drawn.
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Affiliation(s)
- Ryan R Thacher
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70Th Street, New York, NY, 10021, USA.
| | - Julia S Retzky
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70Th Street, New York, NY, 10021, USA
| | - Mihir S Dekhne
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70Th Street, New York, NY, 10021, USA
| | - Yousi A Oquendo
- Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70Th Street, New York, NY, 10021, USA
| | - Harry G Greditzer
- Department of Radiology, Hospital for Special Surgery, 535 East 70Th Street, New York, NY, 10021, USA
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Gowda P, Kohli A, Chhabra A. Two-Dimensional and 3-Dimensional MRI Assessment of Progressive Collapsing Foot Deformity-Adult Acquired Flat Foot Deformity. Foot Ankle Clin 2023; 28:551-566. [PMID: 37536818 DOI: 10.1016/j.fcl.2023.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
This article is meant to serve as a reference for radiologists, orthopedic surgeons, and other physicians to enhance their understanding of progressive collapsing foot deformity, also known as adult acquired flat foot deformity. Pathophysiology, imaging findings, especially on MRI and 3-dimensional MRI are discussed with relevant illustrations so that the readers can apply these principles in their practice for better patient managements.
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Affiliation(s)
- Prajwal Gowda
- Radiology, UT Southwestern Medical Center, Dallas, TX, USA; Orthopedic Surgery, UT Southwestern Medical Center, Dallas, TX, USA
| | - Ajit Kohli
- Radiology, UT Southwestern Medical Center, Dallas, TX, USA; Orthopedic Surgery, UT Southwestern Medical Center, Dallas, TX, USA
| | - Avneesh Chhabra
- Radiology, UT Southwestern Medical Center, Dallas, TX, USA; Orthopedic Surgery, UT Southwestern Medical Center, Dallas, TX, USA.
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11
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Zaman FA, Zhang L, Zhang H, Sonka M, Wu X. Segmentation quality assessment by automated detection of erroneous surface regions in medical images. Comput Biol Med 2023; 164:107324. [PMID: 37591161 PMCID: PMC10563140 DOI: 10.1016/j.compbiomed.2023.107324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 07/17/2023] [Accepted: 08/07/2023] [Indexed: 08/19/2023]
Abstract
Despite the advancement in deep learning-based semantic segmentation methods, which have achieved accuracy levels of field experts in many computer vision applications, the same general approaches may frequently fail in 3D medical image segmentation due to complex tissue structures, noisy acquisition, disease-related pathologies, as well as the lack of sufficiently large datasets with associated annotations. For expeditious diagnosis and quantitative image analysis in large-scale clinical trials, there is a compelling need to predict segmentation quality without ground truth. In this paper, we propose a deep learning framework to locate erroneous regions on the boundary surfaces of segmented objects for quality control and assessment of segmentation. A Convolutional Neural Network (CNN) is explored to learn the boundary related image features of multi-objects that can be used to identify location-specific inaccurate segmentation. The predicted error locations can facilitate efficient user interaction for interactive image segmentation (IIS). We evaluated the proposed method on two data sets: Osteoarthritis Initiative (OAI) 3D knee MRI and 3D calf muscle MRI. The average sensitivity scores of 0.95 and 0.92, and the average positive predictive values of 0.78 and 0.91 were achieved, respectively, for erroneous surface region detection of knee cartilage segmentation and calf muscle segmentation. Our experiment demonstrated promising performance of the proposed method for segmentation quality assessment by automated detection of erroneous surface regions in medical images.
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Affiliation(s)
- Fahim Ahmed Zaman
- Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, IA 52242, USA
| | - Lichun Zhang
- Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, IA 52242, USA
| | - Honghai Zhang
- Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, IA 52242, USA
| | - Milan Sonka
- Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, IA 52242, USA
| | - Xiaodong Wu
- Department of Electrical and Computer Engineering, The University of Iowa, Iowa City, IA 52242, USA.
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12
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Ren Z, Huang X, Peng H, Ma J, Zhang Y, Yu T. 3D MRI PD-SPACE-COR Predicting Safety Margin for Coracoid Transfer. Orthop Surg 2023. [PMID: 37092459 DOI: 10.1111/os.13719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 02/24/2023] [Accepted: 03/06/2023] [Indexed: 04/25/2023] Open
Abstract
OBJECTIVE The maximum bone length available for coracoid process transfer varies among individuals, while no preoperative guideline has been developed for predicting the safety margin (SM) in Latarjet shoulder reconstruction. The aim of the study was to evaluate the 3D MRI proton density (PD)-weighted sampling perfection with application-optimized contrasts using different flip-angle evolution (SPACE) sequence in preoperatively predicting SM for coracoid transfer. METHODS The post-multiplanar reconstructed images were obtained from 24 volunteers (17 males, seven females) to determine the clarity and sensitivity of the PD-SPACE-COR and PD-SPACE-FS-COR protocols. Furthermore, the distance from the coracoid tip to the lateral edge of the attachment of trapezoid ligament (TL) was measured. To evaluate the accuracy of 3D MRI prediction, a cadaveric cohort has been launched in 32 shoulders (nine males, seven females). The distance between the tip of coracoid process and the outmost edge of TL footprint, namely, the SM, was measured. RESULTS A better sensitivity was found in PD-SPACE-COR in detecting coracoclavicular ligaments (CCLs), including TL and conoid ligament (CL), compared to PD-SPACE-FS-COR by ranking, McNemar test (P = 0.001), and kappa coefficients (κ = 0.51, P = 0.43). The SM determined by the PD-SPACE-COR protocol was 24.28 ± 2.17 mm while that by cadaveric morphometry was 25.53 ± 2.84 mm. No difference was found between measurements (P = 0.78). CONCLUSION This research provides new insights for preoperatively geometrical planning coracoid transfer by 3D MRI PD-SPACE-COR, which motivates personalized medicine in orthopedics.
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Affiliation(s)
- Zhongkai Ren
- Department of Sports Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xiaohong Huang
- Shandong Institute of Traumatic Orthopedics, Medical Research Center, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Haining Peng
- Department of Sports Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jinlong Ma
- Department of Sports Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yingze Zhang
- Department of Orthopedics, Affiliated Hospital of Qingdao University, Qingdao, China
- Department of Orthopedics, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Tengbo Yu
- Department of Sports Medicine, Affiliated Hospital of Qingdao University, Qingdao, China
- Department of Orthopedic Surgery, Qingdao Hospital, University of Health and Rehabilitation Sciences (Qingdao Municipal Hospital), Qingdao, China
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13
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Jardon M, Tan ET, Chazen JL, Sahr M, Wen Y, Schneider B, Sneag DB. Deep-learning-reconstructed high-resolution 3D cervical spine MRI for foraminal stenosis evaluation. Skeletal Radiol 2023; 52:725-732. [PMID: 36269331 DOI: 10.1007/s00256-022-04211-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/23/2022] [Accepted: 10/13/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To compare standard-of-care two-dimensional MRI acquisitions of the cervical spine with those from a single three-dimensional MRI acquisition, reconstructed using a deep-learning-based reconstruction algorithm. We hypothesized that the improved image quality provided by deep-learning-based reconstruction would result in improved inter-rater agreement for cervical spine foraminal stenosis compared to conventional two-dimensional acquisitions. MATERIALS AND METHODS Forty-one patients underwent routine cervical spine MRI with a conventional protocol comprising two-dimensional T2-weighted fast spin echo scans (2 axial planes, 1 sagittal plane), and an isotropic-resolution three-dimensional T2-weighted fast spin echo scan reconstructed over a 4-h time window with a deep-learning-based reconstruction algorithm. Three radiologists retrospectively assessed images for the degree to which motion artifact limited clinical assessment, and foraminal and central stenosis at each level. Inter-rater agreement was analyzed with weighted Fleiss's kappa (k) and comparisons between two-dimensional and three-dimensional sequences were performed with Wilcoxon signed-rank test. RESULTS Inter-rater agreement for foraminal stenosis was "substantial" for two-dimensional sequences (k = 0.76) and "excellent" for the three-dimensional sequence (k = 0.81). Agreement was "excellent" for both sequences (k = 0.85 and 0.83) for central stenosis. The three-dimensional sequence had less perceptible motion artifact (p ≤ 0.001-0.036). Mean total scan time was 10.8 min for the two-dimensional sequences, and 7.3 min for the three-dimensional sequence. CONCLUSION Three-dimensional MRI reconstructed with a deep-learning-based algorithm provided "excellent" inter-observer agreement for foraminal and central stenosis, which was at least equivalent to standard-of-care two-dimensional imaging. Three-dimensional MRI with deep-learning-based reconstruction was less prone to motion artifact, with overall scan time savings.
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Affiliation(s)
- Meghan Jardon
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY, 10021, USA
| | - Ek T Tan
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY, 10021, USA
| | - J Levi Chazen
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY, 10021, USA
| | - Meghan Sahr
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY, 10021, USA
| | - Yan Wen
- GE Healthcare, Waukesha, WI, USA
| | - Brandon Schneider
- Biostatistics Core, Research Administration, Hospital for Special Surgery, New York, NY, 10021, USA
| | - Darryl B Sneag
- Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY, 10021, USA.
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Kim BI, Hudson CP, Taylor DC, Anakwenze OA, Dickens JF, Lau BC. Distal Clavicle Autograft Versus Traditional and Congruent Arc Latarjet Procedures: A Comparison of Surface Area and Glenoid Apposition With 3-Dimensional Computed Tomography and 3-Dimensional Magnetic Resonance Imaging. Am J Sports Med 2023; 51:1295-1302. [PMID: 36927084 DOI: 10.1177/03635465231157430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
BACKGROUND Limited studies have compared graft-glenoid apposition and glenoid augmentation area between the Latarjet procedure and distal clavicle graft in glenohumeral stabilization. Additionally, preoperative planning is typically performed using computed tomography (CT), and few studies have used 3-dimensional (3D) magnetic resonance imaging (MRI) reformations to assess graft dimensions. PURPOSE The purpose of this study was 2-fold: (1) to compare bony apposition, glenoid augmentation, and graft width among coracoid and distal clavicle bony augmentation techniques and (2) to determine the viability of 3D MRI to assess bone graft dimensions. STUDY DESIGN Controlled laboratory study. METHODS A total of 24 patients with recurrent glenohumeral instability and bone loss were included in this study. 3D CT and 3D MRI reformations were utilized to measure pertinent dimensions for 5 orientations of coracoid and distal clavicle autografts: (1) standard Latarjet procedure (SLJ), (2) congruent arc Latarjet procedure (CLJ), (3) distal clavicle attached by its posterior surface (DCP), (4) distal clavicle attached by its inferior surface (DCI), and (5) distal clavicle attached by its resected end (DCR). Glenoid augmentation was defined as the graft surface area contributing to the glenoid. Bone-on-bone apposition was defined as the graft-glenoid contact area for bone healing potential, and graft width was pertinent for fixation technique. Glenoid bone loss ranged from 0% to 34%. Paired t tests were used to compare graft sizes between patients and compare 3D CT versus 3D MRI measurements. RESULTS The CLJ had the largest graft surface area (mean, 318.41 ± 74.44 mm2), while the SLJ displayed the most bone-on-bone apposition (mean, 318.41 ± 74.44 mm2). The DCI had the largest graft width (mean, 20.62 ± 3.93 mm). Paired t tests revealed no significant differences between the Latarjet techniques, whereas distal clavicle grafts varied significantly with orientation. All 3D CT and 3D MRI measurements were within 1 mm of each other, and only 2 demonstrated a statistically significant difference (coracoid width: 13.03 vs 13.98 mm, respectively [P = .010]; distal clavicle thickness: 9.69 vs 10.77 mm, respectively [P = .002]). 3D CT and 3D MRI measurements demonstrated a strong positive correlation (r > 0.6 and P < .001 for all dimensions). CONCLUSION Glenoid augmentation, bony apposition, and graft width varied with coracoid or distal clavicle graft type and orientation. Differences between 3D CT and 3D MRI were small and likely not clinically significant. CLINICAL RELEVANCE 3D MRI is a viable method for preoperative planning and graft selection in glenoid bone loss.
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Affiliation(s)
- Billy I Kim
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
| | - Caroline P Hudson
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
| | - Dean C Taylor
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
| | - Oke A Anakwenze
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
| | - Jonathan F Dickens
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
| | - Brian C Lau
- Department of Orthopaedic Surgery, Duke University, Durham, North Carolina, USA
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Lee SH, Kim W, Lee JS. What are the resection accuracy and guide-fitting errors associated with 3D-printed, patient-specific resection guides for bone tumour resections? Bone Joint J 2023; 105-B:190-197. [PMID: 36722060 DOI: 10.1302/0301-620x.105b2.bjj-2022-0585.r2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
AIMS This study aimed to analyze the accuracy and errors associated with 3D-printed, patient-specific resection guides (3DP-PSRGs) used for bone tumour resection. METHODS We retrospectively reviewed 29 bone tumour resections that used 3DP-PSRGs based on 3D CT and 3D MRI. We evaluated the resection amount errors and resection margin errors relative to the preoperative plans. Guide-fitting errors and guide distortion were evaluated intraoperatively and one month postoperatively, respectively. We categorized each of these error types into three grades (grade 1, < 1 mm; grade 2, 1 to 3 mm; and grade 3, > 3 mm) to evaluate the overall accuracy. RESULTS The maximum resection amount error was 2 mm. Out of 29 resection amount errors, 15 (51.7%) were grade 1 errors and 14 (38.3%) were grade 2 errors. Complex resections were associated with higher-grade resection amount errors (p < 0.001). The actual resection margins correlated significantly with the planned margins; however, there were some discrepancies. The maximum guide-fitting error was 3 mm. There were 22 (75.9%), five (17.2%), and two (6.9%) grade 1, 2, and 3 guide-fitting errors, respectively. There was no significant association between complex resection and fitting error grades. The guide distortion after one month in all patients was rated as grade 1. CONCLUSION In terms of the accurate resection amount according to the preoperative planning, 3DP-PSRGs can be a viable option for bone tumour resection. However, 3DP-PSRG use may be associated with resection margin length discrepancies relative to the planned margins. Such discrepancies should be considered when determining surgical margins. Therefore, a thorough evaluation of the preoperative imaging and surgical planning is still required, even if 3DP-PSRGs are to be used.Cite this article: Bone Joint J 2023;105-B(2):190-197.
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Affiliation(s)
- Seung H Lee
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Wanlim Kim
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Jong S Lee
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
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Shin S, Han Y, Chung JY. A 2D-GRAPPA Algorithm with a Boomerang Kernel for 3D MRI Data Accelerated along Two Phase-Encoding Directions. Sensors (Basel) 2022; 23:93. [PMID: 36616690 PMCID: PMC9823302 DOI: 10.3390/s23010093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/14/2022] [Accepted: 12/18/2022] [Indexed: 06/17/2023]
Abstract
For the reconstruction of 3D MRI data that are accelerated along the two phase-encoding directions, the 2D-generalized autocalibrating partially parallel acquisitions (GRAPPA) algorithm can be used to estimate the missing data in the k-space. We propose a new boomerang-shaped kernel based on theoretic and systemic analyses of the shape and dimensions of the kernel. The reconstruction efficiency of the 2D-GRAPPA algorithm with the proposed boomerang-shaped kernel (i.e., boomerang kernel (BK)-2D-GRAPPA) was compared with other 2D-GRAPPA algorithms that utilize different types of kernels (i.e., EX-2D-GRAPPA and SK-2D-GRAPPA) based on computer simulation, phantom and in vivo experiments. The proposed method was validated for different sets of ACS lines with acceleration factors from four to eight and various sizes of the kernels. A quantitative analysis was also performed by comparing the normalized root mean squared error (nRMSE) in the images and the undersampled edges. Computer simulation, in vivo and phantom experiments, and the quantitative analysis, showed that the proposed method could reduce aliasing artifacts without reducing the SNRs of the reconstructed images.
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Affiliation(s)
- Seonyeong Shin
- Department of Neuroscience, College of Medicine, Gachon University, Incheon 21988, Republic of Korea
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21988, Republic of Korea
| | - Yeji Han
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21988, Republic of Korea
- Department of Biomedical Engineering, Gachon University, Seongnam 13120, Republic of Korea
| | - Jun-Young Chung
- Department of Neuroscience, College of Medicine, Gachon University, Incheon 21988, Republic of Korea
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21988, Republic of Korea
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Lim EC, Choi US, Choi KY, Lee JJ, Sung YW, Ogawa S, Kim BC, Lee KH, Gim J. DeepParcellation: A novel deep learning method for robust brain magnetic resonance imaging parcellation in older East Asians. Front Aging Neurosci 2022; 14:1027857. [PMID: 36570529 PMCID: PMC9783623 DOI: 10.3389/fnagi.2022.1027857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 11/15/2022] [Indexed: 12/13/2022] Open
Abstract
Accurate parcellation of cortical regions is crucial for distinguishing morphometric changes in aged brains, particularly in degenerative brain diseases. Normal aging and neurodegeneration precipitate brain structural changes, leading to distinct tissue contrast and shape in people aged >60 years. Manual parcellation by trained radiologists can yield a highly accurate outline of the brain; however, analyzing large datasets is laborious and expensive. Alternatively, newly-developed computational models can quickly and accurately conduct brain parcellation, although thus far only for the brains of Caucasian individuals. To develop a computational model for the brain parcellation of older East Asians, we trained magnetic resonance images of dimensions 256 × 256 × 256 on 5,035 brains of older East Asians (Gwangju Alzheimer's and Related Dementia) and 2,535 brains of Caucasians. The novel N-way strategy combining three memory reduction techniques inception blocks, dilated convolutions, and attention gates was adopted for our model to overcome the intrinsic memory requirement problem. Our method proved to be compatible with the commonly used parcellation model for Caucasians and showed higher similarity and robust reliability in older aged and East Asian groups. In addition, several brain regions showing the superiority of the parcellation suggest that DeepParcellation has a great potential for applications in neurodegenerative diseases such as Alzheimer's disease.
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Affiliation(s)
- Eun-Cheon Lim
- Gwangju Alzheimer’s and Related Dementia Cohort Research Center, Chosun University, Gwangju, South Korea
| | - Uk-Su Choi
- Gwangju Alzheimer’s and Related Dementia Cohort Research Center, Chosun University, Gwangju, South Korea,BK FOUR Department of Integrative Biological Sciences, Chosun University, Gwangju, South Korea,Neurozen Inc., Seoul, South Korea,Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, South Korea
| | - Kyu Yeong Choi
- Gwangju Alzheimer’s and Related Dementia Cohort Research Center, Chosun University, Gwangju, South Korea
| | - Jang Jae Lee
- Gwangju Alzheimer’s and Related Dementia Cohort Research Center, Chosun University, Gwangju, South Korea
| | - Yul-Wan Sung
- Kansei Fukushi Research Institute, Tohoku Fukushi University, Sendai, Miyagi, Japan
| | - Seiji Ogawa
- Kansei Fukushi Research Institute, Tohoku Fukushi University, Sendai, Miyagi, Japan
| | - Byeong Chae Kim
- Department of Neurology, Chonnam National University Medical School, Gwangju, South Korea
| | - Kun Ho Lee
- Gwangju Alzheimer’s and Related Dementia Cohort Research Center, Chosun University, Gwangju, South Korea,BK FOUR Department of Integrative Biological Sciences, Chosun University, Gwangju, South Korea,Neurozen Inc., Seoul, South Korea,Department of Biomedical Science, Chosun University, Gwangju, South Korea,Korea Brain Research Institute, Daegu, South Korea,*Correspondence: Kun Ho Lee,
| | - Jungsoo Gim
- Gwangju Alzheimer’s and Related Dementia Cohort Research Center, Chosun University, Gwangju, South Korea,BK FOUR Department of Integrative Biological Sciences, Chosun University, Gwangju, South Korea,Department of Biomedical Science, Chosun University, Gwangju, South Korea,Jungsoo Gim,
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Thakur U, Gulati V, Shah J, Tietze D, Chhabra A. Anterior cruciate ligament reconstruction related complications: 2D and 3D high-resolution magnetic resonance imaging evaluation. Skeletal Radiol 2022; 51:1347-1364. [PMID: 34977965 DOI: 10.1007/s00256-021-03982-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/16/2021] [Accepted: 12/17/2021] [Indexed: 02/02/2023]
Abstract
Anterior cruciate ligament (ACL) injury is a common indication for sports-related major surgery and accounts for a large proportion of ligamentous injuries in athletes. The advancements in 2D and 3D MR imaging have provided considerable potential for a one-stop shop radiation-free assessment with an all-in-one modality examination of the knee, for both soft-tissue and bone evaluations. This article reviews ACL injuries and types of surgical managements with illustrative examples using high resolution 2D and 3D MR imaging. Various complications of ACL reconstruction procedures are highlighted with a focus on the use of advanced MR imaging and relevant arthroscopic correlations.
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Affiliation(s)
- Uma Thakur
- Department of Radiology, UT Southwestern Medical Center, Dallas, Texas, USA
| | - Vaibhav Gulati
- Department of Radiology, Imaging Associates at National Heart Institute, New Delhi, India
| | - Jay Shah
- Department of Orthopaedic Surgery, UT Southwestern Medical Center, Dallas, Texas, USA
| | - David Tietze
- Department of Orthopaedic Surgery, UT Southwestern Medical Center, Dallas, Texas, USA
| | - Avneesh Chhabra
- Department of Radiology, UT Southwestern Medical Center, Dallas, Texas, USA. .,Department of Orthopaedic Surgery, UT Southwestern Medical Center, Dallas, Texas, USA.
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Termine A, Fabrizio C, Caltagirone C, Petrosini L. A Reproducible Deep-Learning-Based Computer-Aided Diagnosis Tool for Frontotemporal Dementia Using MONAI and Clinica Frameworks. Life (Basel) 2022; 12:life12070947. [PMID: 35888037 PMCID: PMC9323676 DOI: 10.3390/life12070947] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/16/2022] [Accepted: 06/21/2022] [Indexed: 12/16/2022]
Abstract
Despite Artificial Intelligence (AI) being a leading technology in biomedical research, real-life implementation of AI-based Computer-Aided Diagnosis (CAD) tools into the clinical setting is still remote due to unstandardized practices during development. However, few or no attempts have been made to propose a reproducible CAD development workflow for 3D MRI data. In this paper, we present the development of an easily reproducible and reliable CAD tool using the Clinica and MONAI frameworks that were developed to introduce standardized practices in medical imaging. A Deep Learning (DL) algorithm was trained to detect frontotemporal dementia (FTD) on data from the NIFD database to ensure reproducibility. The DL model yielded 0.80 accuracy (95% confidence intervals: 0.64, 0.91), 1 sensitivity, 0.6 specificity, 0.83 F1-score, and 0.86 AUC, achieving a comparable performance with other FTD classification approaches. Explainable AI methods were applied to understand AI behavior and to identify regions of the images where the DL model misbehaves. Attention maps highlighted that its decision was driven by hallmarking brain areas for FTD and helped us to understand how to improve FTD detection. The proposed standardized methodology could be useful for benchmark comparison in FTD classification. AI-based CAD tools should be developed with the goal of standardizing pipelines, as varying pre-processing and training methods, along with the absence of model behavior explanations, negatively impact regulators' attitudes towards CAD. The adoption of common best practices for neuroimaging data analysis is a step toward fast evaluation of efficacy and safety of CAD and may accelerate the adoption of AI products in the healthcare system.
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Affiliation(s)
- Andrea Termine
- Data Science Unit, IRCCS Santa Lucia Foundation, 00143 Rome, Italy; (A.T.); (C.F.)
| | - Carlo Fabrizio
- Data Science Unit, IRCCS Santa Lucia Foundation, 00143 Rome, Italy; (A.T.); (C.F.)
| | - Carlo Caltagirone
- Department of Clinical and Behavioral Neurology, IRCCS Santa Lucia Foundation, 00179 Rome, Italy;
| | - Laura Petrosini
- Experimental and Behavioral Neurophysiology, IRCCS Santa Lucia Foundation, 00143 Rome, Italy
- Correspondence:
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Nguyen T, Haider S, Tietze D, Xi Y, Thakur U, Shah J, Chhabra A. Anterior cruciate ligament foot plate anatomy: 3-dimensional and 2-dimensional MRI evaluation with arthroscopy assessment in a subset of patients. Eur Radiol 2022; 32:8386-8393. [PMID: 35713663 DOI: 10.1007/s00330-022-08920-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/21/2022] [Revised: 04/06/2022] [Accepted: 05/30/2022] [Indexed: 11/04/2022]
Abstract
OBJECTIVES ACL reconstruction tunnel location is an important predictor for outcomes after surgery. The aim was to establish 3D and 2D MRI radiological measurements for native ACL tibial footprint that can provide information to facilitate pre-operative planning for anatomical graft placement. The measurements were also correlated in a subset of patients on arthroscopy. METHODS Retrospective evaluation of a consecutive series of knee MRIs with both 2D and 3D MR imaging was performed in 101 patients with 43 men and 66 women and ages 39.5 ± 11.9 years. Two measurements were obtained, tibial to ACL and intermeniscal ligament to ACL (T-ACL) and (IM-ACL), respectively. In a cohort of 18 patients who underwent knee arthroscopy, the T-ACL and IML-ACL distances were also determined by an orthopedic surgeon using a standard scale. ICC, Pearson correlation, and Bland-Altman plot were generated. RESULTS For readers 1 and 2, the mean differences between 2D and 3D measurements of T-ACL and IM-ACL were 1.17 and 1.03 mm and 0.65 and 0.65 mm, respectively. The 2D measurements of T-ACL and IM-ACL were larger than the 3D measurements for both readers. The inter-reader reliability was excellent on 2D (0.81-0.96) and fair to excellent on 3D MRI (0.59-0.90). The mean arthroscopic IML-ACL was closer to that of 3D MRI compared to 2D MRI. The mean arthroscopic T-ACL was closer to 2D MRI than 3D MRI. CONCLUSIONS Both 2D and 3D MRI show inter-reader reliability with small inter-modality mean differences in the measurements from the tibial or inter-meniscal ligament margins. KEY POINTS • The mean differences between 2D and 3D measurements of tibia-ACL and intermeniscal ligament-ACL are small (< 1.2 mm). • As compared to arthroscopy, the mean T-ACL and IML-ACL were closer to measurements from 2D and 3D MRI, respectively. • Both 2D and 3D MRI can be reliably used to delineate ACL foot plate anatomy.
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Affiliation(s)
- Toan Nguyen
- Department of Radiology, UT Southwestern Medical Center, Dallas, USA
| | - Shamrez Haider
- Department of Radiology, UT Southwestern Medical Center, Dallas, USA
| | - David Tietze
- Department of Orthopedic Surgery, UT Southwestern Medical Center, UT Southwestern, 5323 Harry Hines Blvd, Dallas, TX, USA
| | - Yin Xi
- Department of Radiology, UT Southwestern Medical Center, Dallas, USA
| | - Uma Thakur
- Department of Radiology, UT Southwestern Medical Center, Dallas, USA
| | - Jay Shah
- Department of Orthopedic Surgery, UT Southwestern Medical Center, UT Southwestern, 5323 Harry Hines Blvd, Dallas, TX, USA
| | - Avneesh Chhabra
- Department of Radiology, UT Southwestern Medical Center, Dallas, USA. .,Department of Orthopedic Surgery, UT Southwestern Medical Center, UT Southwestern, 5323 Harry Hines Blvd, Dallas, TX, USA. .,Johns Hopkins University, Baltimore, USA. .,Walton Centre for Neuroscience, Liverpool, UK.
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Almajalid R, Zhang M, Shan J. Fully Automatic Knee Bone Detection and Segmentation on Three-Dimensional MRI. Diagnostics (Basel) 2022; 12:123. [PMID: 35054290 PMCID: PMC8774512 DOI: 10.3390/diagnostics12010123] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/24/2021] [Accepted: 12/30/2021] [Indexed: 02/06/2023] Open
Abstract
In the medical sector, three-dimensional (3D) images are commonly used like computed tomography (CT) and magnetic resonance imaging (MRI). The 3D MRI is a non-invasive method of studying the soft-tissue structures in a knee joint for osteoarthritis studies. It can greatly improve the accuracy of segmenting structures such as cartilage, bone marrow lesion, and meniscus by identifying the bone structure first. U-net is a convolutional neural network that was originally designed to segment the biological images with limited training data. The input of the original U-net is a single 2D image and the output is a binary 2D image. In this study, we modified the U-net model to identify the knee bone structures using 3D MRI, which is a sequence of 2D slices. A fully automatic model has been proposed to detect and segment knee bones. The proposed model was trained, tested, and validated using 99 knee MRI cases where each case consists of 160 2D slices for a single knee scan. To evaluate the model's performance, the similarity, dice coefficient (DICE), and area error metrics were calculated. Separate models were trained using different knee bone components including tibia, femur, patella, as well as a combined model for segmenting all the knee bones. Using the whole MRI sequence (160 slices), the method was able to detect the beginning and ending bone slices first, and then segment the bone structures for all the slices in between. On the testing set, the detection model accomplished 98.79% accuracy and the segmentation model achieved DICE 96.94% and similarity 93.98%. The proposed method outperforms several state-of-the-art methods, i.e., it outperforms U-net by 3.68%, SegNet by 14.45%, and FCN-8 by 2.34%, in terms of DICE score using the same dataset.
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Affiliation(s)
- Rania Almajalid
- Department of Computer Science, Seidenberg School of CSIS, Pace University, New York, NY 10038, USA;
- College of Computing and Informatics, Saudi Electronic University, Riyadh 11673, Saudi Arabia
| | - Ming Zhang
- Department of Computer Science & Networking, Wentworth Institute of Technology, Boston, MA 02115, USA
- Division of Rheumatology, Tufts Medical Center, Boston, MA 02111, USA
| | - Juan Shan
- Department of Computer Science, Seidenberg School of CSIS, Pace University, New York, NY 10038, USA;
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22
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Sivakumaran T, Jaffer R, Marwan Y, Hart A, Radu A, Burman M, Martineau PA, Powell T. Reliability of Anatomic Bony Landmark Localization of the ACL Femoral Footprint Using 3D MRI. Orthop J Sports Med 2021; 9:23259671211042603. [PMID: 34692880 PMCID: PMC8532227 DOI: 10.1177/23259671211042603] [Citation(s) in RCA: 2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 05/25/2021] [Indexed: 11/24/2022] Open
Abstract
Background: Nonanatomic placement of anterior cruciate ligament (ACL) grafts is a leading cause of ACL graft failure. Three-dimensional (3D) magnetic resonance imaging (MRI) femoral footprint localization could enhance planning for an ACL graft's position. Purpose: To determine the intra- and interobserver reliability of measurements of the ACL femoral footprint position and size obtained from 3D MRI scans. Study Design: Cohort study; Level of evidence, 3. Methods: A total of 41 patients with complete ACL tears were recruited between November 2014 and May 2016. Preoperatively, a coronal-oblique proton-density fast spin echo 3D acquisition of the contralateral uninjured knee was obtained along the plane of the ACL using a 1.5T MRI scanner. ACL footprint parameters were obtained independently by 2 musculoskeletal radiologists (observers A and B). The distal and anterior positions of the center of the footprint were measured relative to the apex of the deep cartilage at the posteromedial aspect of the lateral femoral condyle, and the surface area of the ACL femoral footprint was approximated from multiplanar reformatted images. After 1 month, the measurements were repeated. Intraclass correlation coefficients (ICCs) were calculated to assess for intra- and interobserver reliability. Bland-Altman plots were produced to screen for potential systematic bias in measurement and to calculate limits of agreement. Results: The ICCs for intraobserver reliability of the ACL femoral distal and anterior footprint coordinates were 0.75 and 0.78, respectively, for observer A. For observer B, they were 0.75 and 0.74, respectively. The ICCs for interobserver reliability were 0.75 and 0.85 for the distal and anterior coordinates, respectively. Bland-Altman plots demonstrated no significant systematic bias. For surface area measurements, the intraobserver ICCs were 0.37 and 0.62 for observers A and B, respectively. The interobserver reliability was 0.60. Observer B consistently measured the footprints as slightly larger versus observer A (1.19 ± 0.27 vs 1 ± 0.22 cm2, respectively; P < .001). Conclusion: Locating the center of the anatomic footprint of the ACL with 3D MRI showed substantial intra- and interobserver agreement. Interobserver agreement for the femoral footprint surface area was fair to moderate.
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Affiliation(s)
- Thiru Sivakumaran
- Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Rehana Jaffer
- McGill University Health Sciences Centre, McGill University, Montreal, Quebec, Canada
| | - Yousef Marwan
- McGill University Health Sciences Centre, McGill University, Montreal, Quebec, Canada
| | - Adam Hart
- McGill University Health Sciences Centre, McGill University, Montreal, Quebec, Canada
| | - Arnold Radu
- McGill University Health Sciences Centre, McGill University, Montreal, Quebec, Canada
| | - Mark Burman
- McGill University Health Sciences Centre, McGill University, Montreal, Quebec, Canada
| | - Paul A Martineau
- McGill University Health Sciences Centre, McGill University, Montreal, Quebec, Canada
| | - Tom Powell
- McGill University Health Sciences Centre, McGill University, Montreal, Quebec, Canada
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Delisle PL, Anctil-Robitaille B, Desrosiers C, Lombaert H. Realistic image normalization for multi-Domain segmentation. Med Image Anal 2021; 74:102191. [PMID: 34509168 DOI: 10.1016/j.media.2021.102191] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 09/18/2020] [Revised: 06/22/2021] [Accepted: 07/19/2021] [Indexed: 11/16/2022]
Abstract
Image normalization is a building block in medical image analysis. Conventional approaches are customarily employed on a per-dataset basis. This strategy, however, prevents the current normalization algorithms from fully exploiting the complex joint information available across multiple datasets. Consequently, ignoring such joint information has a direct impact on the processing of segmentation algorithms. This paper proposes to revisit the conventional image normalization approach by, instead, learning a common normalizing function across multiple datasets. Jointly normalizing multiple datasets is shown to yield consistent normalized images as well as an improved image segmentation when intensity shifts are large. To do so, a fully automated adversarial and task-driven normalization approach is employed as it facilitates the training of realistic and interpretable images while keeping performance on par with the state-of-the-art. The adversarial training of our network aims at finding the optimal transfer function to improve both, jointly, the segmentation accuracy and the generation of realistic images. We have evaluated the performance of our normalizer on both infant and adult brain images from the iSEG, MRBrainS and ABIDE datasets. The results indicate that our contribution does provide an improved realism to the normalized images, while retaining a segmentation accuracy at par with the state-of-the-art learnable normalization approaches.
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Affiliation(s)
| | | | | | - Herve Lombaert
- Department of Computer and Software Engineering, ETS Montreal, Canada
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24
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Sekiya I, Kohno Y, Hyodo A, Katano H, Komori K, Koga H, Tomita M, Suzuki K, Masumoto J, Ozeki N. Interscan measurement error of knee cartilage thickness and projected cartilage area ratio at 9 regions and 45 subregions by fully automatic three-dimensional MRI analysis. Eur J Radiol 2021; 139:109700. [PMID: 33865065 DOI: 10.1016/j.ejrad.2021.109700] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 11/01/2020] [Revised: 02/17/2021] [Accepted: 04/04/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND We have developed a fully automatic three-dimensional MRI analysis software program for automatic segmentation of knee cartilage using a deep neural network. The purpose of this study was to use this software to clarify the interscan measurement error of the knee cartilage thickness and projected cartilage area ratio at 9 regions and 45 subregions in the knee. METHODS Ten healthy volunteers underwent MRI twice in the same day. The software provided cartilage thickness and projected cartilage area ratio (thickness ≥ 1.5 mm) at 9 regions and 45 subregions of the knee without any manual correction. The interscan measurement error was calculated at each region and subregion from the data of nine donors, except for one donor who had body motion during the MRI examination. RESULTS The interscan measurement error of cartilage thickness was less than 0.10 mm at all 9 regions and at 39 subregions among 45 subregions. The measurement errors ranged from 0.03 to 0.21 mm. The intraclass correlation coefficients (ICC) of cartilage thickness were higher than 0.75 at all 9 regions and 41 subregions. The interscan measurement error of the projected cartilage area ratio ranged from 0.01 to 0.03 for all 9 regions. CONCLUSIONS This study clarified the interscan measurement error of the knee cartilage thickness and projected cartilage area ratio.
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Affiliation(s)
- Ichiro Sekiya
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Japan.
| | - Yuji Kohno
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Japan.
| | - Akinobu Hyodo
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Japan.
| | - Hisako Katano
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Japan.
| | - Keiichiro Komori
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Japan.
| | - Hideyuki Koga
- Department of Joint Surgery and Sports Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan.
| | - Makoto Tomita
- School of Data Science, Graduate School of Data Science, Yokohama City University, Japan.
| | | | | | - Nobutake Ozeki
- Center for Stem Cell and Regenerative Medicine, Tokyo Medical and Dental University, Japan.
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Ozeki N, Kohno Y, Kushida Y, Watanabe N, Mizuno M, Katano H, Masumoto J, Koga H, Sekiya I. Synovial mesenchymal stem cells promote the meniscus repair in a novel pig meniscus injury model. J Orthop Res 2021; 39:177-183. [PMID: 32886427 PMCID: PMC7821148 DOI: 10.1002/jor.24846] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 08/20/2020] [Accepted: 09/02/2020] [Indexed: 02/04/2023]
Abstract
Stem cell therapy has potential for the treatment of degenerative meniscus injuries; however, an optimal animal model has not been established. Basic and clinical research show that synovial mesenchymal stem cells (MSCs) promote meniscus repair. The purposes of this study were to create a novel meniscus injury model in microminipigs and to investigate the effectiveness of synovial MSCs on meniscus healing in this model. The posterior portion of the medial meniscus in microminipigs was punctuated 200 times with a 23G needle. Allogenic synovial MSC suspension was placed on the injury site for 10 min for transplantation. The meniscus was evaluated histologically and via sagittal magnetic resonance imaging (MRI), radial MRI reconstructed in three dimensional, and T2 mapping at 1 and 8 weeks. Proteoglycan content stained with safranin-o disappeared 1 week after treatment in both the MSC and control groups but increased at 8 weeks only in the MSC group. Histological scores at 8 weeks were significantly higher in the MSC group than in the control group (n = 6). At 8 weeks, the T2 values of the MSC group were significantly closer to those of a normal meniscus than were those of the control group. High signal intensity areas of the MRIs and positive areas stained with picrosirius red coincided with meniscal lesions. In conclusion, we created a novel meniscus injury model in microminipigs. Evaluation via histology, MRIs, and polarized microscopy showed that transplantation of synovial MSCs improved meniscus healing.
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Affiliation(s)
- Nobutake Ozeki
- Center for Stem Cell and Regenerative MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Yuji Kohno
- Center for Stem Cell and Regenerative MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Yoshihisa Kushida
- Center for Stem Cell and Regenerative MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Naoto Watanabe
- Center for Stem Cell and Regenerative MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Mitsuru Mizuno
- Center for Stem Cell and Regenerative MedicineTokyo Medical and Dental UniversityTokyoJapan
| | - Hisako Katano
- Center for Stem Cell and Regenerative MedicineTokyo Medical and Dental UniversityTokyoJapan
| | | | - Hideyuki Koga
- Department of Joint Surgery and Sports Medicine, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityTokyoJapan
| | - Ichiro Sekiya
- Center for Stem Cell and Regenerative MedicineTokyo Medical and Dental UniversityTokyoJapan
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Fujikawa T, Honda K, Ito T, Kishino M, Kimura N, Umezawa N, Hirano M, Aoki N, Kawashima Y, Tsutsumi T. Enhanced fallopian canal as a potential marker for temporal bone vasculitis. Laryngoscope Investig Otolaryngol 2020; 5:1168-1175. [PMID: 33364409 PMCID: PMC7752078 DOI: 10.1002/lio2.489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 07/01/2020] [Revised: 10/23/2020] [Accepted: 10/23/2020] [Indexed: 12/02/2022] Open
Abstract
OBJECTIVES This study aimed to test the hypothesis that contrast-enhanced 3D MRI with gradient-echo sequences (CE-3D-GRE) can detect signs of vasculitis in the fallopian canal, which may cause otologic involvement, in four patients with antineutrophil cytoplasmic antibody-associated vasculitis (AAV). METHODS CE-3D-GRE acquired at 3.0 Tesla was performed on four patients diagnosed with granulomatosis with polyangiitis or eosinophilic granulomatosis with polyangiitis, at onset or relapse of the disease, and in remission. Clinical correlations between otologic symptoms and radiological findings were examined for each patient. Furthermore, signal intensity of the mastoid segment of the fallopian canal was compared between the ears with active disease (n = 3) and those in remission or without vasculitis (n = 3). RESULTS Intense enhancement in the tympanic and mastoid segments of the fallopian canal was associated with development of external otitis, otitis media, and sensorineural hearing loss, and was unrelated to the presence of facial paresis. Maximal intensity projection images visualized the close relationship between the enhanced fallopian canal and middle ear inflammation. The findings were absent in remission. Signal intensity of the mastoid segment of the fallopian canal was higher in ears with active disease than in normal ears (P < .001) and decreased to normal levels during remission (P = .597). CONCLUSION CE-3D-GRE can demonstrate vasculitis in the temporal bone, reflecting disease activity and the severity of otologic manifestations, including cochlear involvement, in AAV patients. Intense enhancement of the fallopian canal on CE-3D-GRE can be a potential marker for vasculitis of the temporal bone. LEVEL OF EVIDENCE 5.
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Affiliation(s)
- Taro Fujikawa
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| | - Keiji Honda
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| | - Taku Ito
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| | - Mitsuhiro Kishino
- Department of RadiologyTokyo Medical and Dental UniversityTokyoJapan
| | - Naoki Kimura
- Department of RheumatologyTokyo Medical and Dental UniversityTokyoJapan
| | - Natsuka Umezawa
- Department of RheumatologyTokyo Medical and Dental UniversityTokyoJapan
| | - Mana Hirano
- Department of RheumatologyNational Defence Medical CollegeTokorozawaJapan
| | - Natsuki Aoki
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
| | | | - Takeshi Tsutsumi
- Department of OtolaryngologyTokyo Medical and Dental UniversityTokyoJapan
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27
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Aoki H, Ozeki N, Katano H, Hyodo A, Miura Y, Matsuda J, Takanashi K, Suzuki K, Masumoto J, Okanouchi N, Fujiwara T, Sekiya I. Relationship between medial meniscus extrusion and cartilage measurements in the knee by fully automatic three-dimensional MRI analysis. BMC Musculoskelet Disord 2020; 21:742. [PMID: 33183257 PMCID: PMC7664063 DOI: 10.1186/s12891-020-03768-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 07/02/2020] [Accepted: 11/03/2020] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND We developed a fully automatic three-dimensional knee MRI analysis software that can quantify meniscus extrusion and cartilage measurements, including the projected cartilage area ratio (PCAR), which represents the ratio of the subject's actual cartilage area to their ideal cartilage area. We also collected 3D MRI knee data from 561 volunteers (aged 30-79 years) from the "Kanagawa Knee Study." Our purposes were to verify the accuracy of the software for automatic cartilage and meniscus segmentation using knee MRI and to examine the relationship between medial meniscus extrusion measurements and cartilage measurements from Kanagawa Knee Study data. METHODS We constructed a neural network for the software by randomly choosing 10 healthy volunteers and 103 patients with knee pain. We validated the algorithm by randomly selecting 108 of these 113 subjects for training, and determined Dice similarity coefficients from five other subjects. We constructed a neural network using all data (113 subjects) for training. Cartilage thickness, cartilage volume, and PCAR in the medial femoral, lateral femoral, medial tibial, and lateral tibial regions were quantified by using the trained software on Kanagawa Knee Study data and their relationship with subject height was investigated. We also quantified the medial meniscus coverage ratio (MMCR), defined as the ratio of the overlapping area between the medial meniscus area and the medial tibial cartilage area to the medial tibial cartilage area. Finally, we examined the relationship between MMCR and PCAR at middle central medial tibial (mcMT) subregion located in the center of nine subregions in the medial tibial cartilage. RESULTS Dice similarity coefficients for cartilage and meniscus were both approximately 0.9. The femoral and tibial cartilage thickness and volume at each region correlated with height, but PCAR did not correlate with height in most settings. PCAR at the mcMT was significantly correlated with MMCR. CONCLUSIONS Our software showed high segmentation accuracy for the knee cartilage and meniscus. PCAR was more useful than cartilage thickness or volume since it was less affected by height. Relations ips were observed between the medial tibial cartilage measurements and the medial meniscus extrusion measurements in our cross-sectional study. TRIAL REGISTRATION UMIN, UMIN000032826 ; 1 September 2018.
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Affiliation(s)
- Hayato Aoki
- Center for Stem Cell and Regenerative Medicine, Department of Applied Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Nobutake Ozeki
- Center for Stem Cell and Regenerative Medicine, Department of Applied Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Hisako Katano
- Center for Stem Cell and Regenerative Medicine, Department of Applied Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Akinobu Hyodo
- Center for Stem Cell and Regenerative Medicine, Department of Applied Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Yugo Miura
- Center for Stem Cell and Regenerative Medicine, Department of Applied Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Junpei Matsuda
- Center for Stem Cell and Regenerative Medicine, Department of Applied Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | - Kimiko Takanashi
- Center for Stem Cell and Regenerative Medicine, Department of Applied Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan
| | | | | | | | - Takeo Fujiwara
- Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ichiro Sekiya
- Center for Stem Cell and Regenerative Medicine, Department of Applied Regenerative Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8510, Japan.
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Lazarus C, Weiss P, El Gueddari L, Mauconduit F, Massire A, Ripart M, Vignaud A, Ciuciu P. 3D variable-density SPARKLING trajectories for high-resolution T2*-weighted magnetic resonance imaging. NMR Biomed 2020; 33:e4349. [PMID: 32613699 DOI: 10.1002/nbm.4349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 04/28/2020] [Accepted: 05/14/2020] [Indexed: 06/11/2023]
Abstract
We have recently proposed a new optimization algorithm called SPARKLING (Spreading Projection Algorithm for Rapid K-space sampLING) to design efficient compressive sampling patterns for magnetic resonance imaging (MRI). This method has a few advantages over conventional non-Cartesian trajectories such as radial lines or spirals: i) it allows to sample the k-space along any arbitrary density while the other two are restricted to radial densities and ii) it optimizes the gradient waveforms for a given readout time. Here, we introduce an extension of the SPARKLING method for 3D imaging by considering both stacks-of-SPARKLING and fully 3D SPARKLING trajectories. Our method allowed to achieve an isotropic resolution of 600 μm in just 45 seconds for T2∗-weighted ex vivo brain imaging at 7 Tesla over a field-of-view of 200 × 200 × 140 mm3 . Preliminary in vivo human brain data shows that a stack-of-SPARKLING is less subject to off-resonance artifacts than a stack-of-spirals.
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Affiliation(s)
- Carole Lazarus
- CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette cedex, 91191, France
- Université Paris-Saclay, France
- INRIA, Parietal, Palaiseau, 91120, France
| | - Pierre Weiss
- ITAV USR3505 CNRS, Toulouse, 31000, France
- IMT UMR 5219 CNRS, Toulouse, 31400, France
- Université de Toulouse, France
| | - Loubna El Gueddari
- CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette cedex, 91191, France
- Université Paris-Saclay, France
- INRIA, Parietal, Palaiseau, 91120, France
| | | | - Aurélien Massire
- CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette cedex, 91191, France
| | - Mathilde Ripart
- CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette cedex, 91191, France
- Université Paris-Saclay, France
| | - Alexandre Vignaud
- CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette cedex, 91191, France
- Université Paris-Saclay, France
| | - Philippe Ciuciu
- CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette cedex, 91191, France
- Université Paris-Saclay, France
- INRIA, Parietal, Palaiseau, 91120, France
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Guirguis A, Polster J, Karim W, Obuchowski N, Rosneck J, Goodwin R, Subhas N. Interchangeability of CT and 3D "pseudo-CT" MRI for preoperative planning in patients with femoroacetabular impingement. Skeletal Radiol 2020; 49:1073-1080. [PMID: 31996983 DOI: 10.1007/s00256-020-03385-0] [Citation(s) in RCA: 4] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/22/2020] [Accepted: 01/24/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine whether a 3D magnetic resonance imaging (MRI) sequence with postprocessing applied to simulate computed tomography (CT) ("pseudo-CT") images can be used instead of CT to measure acetabular version and alpha angles and to plan for surgery in patients with femoroacetabular impingement (FAI). MATERIALS AND METHODS Four readers retrospectively measured acetabular version and alpha angles on MRI and CT images of 40 hips from 20 consecutive patients (9 female patients, 11 male patients; mean age, 26.0 ± 6.5 years) with FAI. 3D models created from MRI and CT images were assessed by 2 orthopedic surgeons to determine the need for femoroplasty and/or acetabuloplasty. Interchangeability of MRI with CT was tested by comparing agreement between 2 readers using CT (intramodality) with agreement between 1 reader using CT and 1 using MRI (intermodality). RESULTS Intramodality and intermodality agreement values were nearly identical for acetabular version and alpha angle measurements and for surgical planning. Increases in inter-reader disagreement for acetabular version angle, alpha angle, and surgical planning when MRI was substituted for CT were - 2.1% (95% confidence interval [CI], - 7.7 to + 3.5%; p = 0.459), - 0.6% (95% CI, - 8.6 to + 7.3%; p = 0.878), and 0% (95% CI, - 15.1 to + 15.1%; p = 1.0), respectively, when an agreement criterion ≤ 5° was used for angle measurements. CONCLUSION Pseudo-CT MRI was interchangeable with CT for measuring acetabular version and highly favorable for interchangeability for measuring alpha angle and for surgical planning, suggesting that MRI could replace CT in assessing patients with FAI.
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Affiliation(s)
- Albair Guirguis
- Department of Diagnostic Radiology, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Joshua Polster
- Department of Diagnostic Radiology, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Wadih Karim
- Department of Diagnostic Radiology, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Nancy Obuchowski
- Department of Quantitative Sciences, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - James Rosneck
- Department of Orthopaedic Surgery, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Ryan Goodwin
- Department of Orthopaedic Surgery, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Naveen Subhas
- Department of Diagnostic Radiology, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA.
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Nagarajan K, Venkataraman A. Thin-section 3D Steady-State MRI in Optic Nerve Coloboma. Neuroophthalmology 2020; 45:281-282. [PMID: 34366519 DOI: 10.1080/01658107.2020.1734845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Optic nerve colobomas are congenital defects in the posterior globe of eye with typical funduscopic appearances. We report a two-year-old child suspected of morning glory disc anomaly who underwent thin-section 3D steady-state magnetic resonance imaging which showed characteristic findings of a tiny defect and discontinuity in the optic nerve head.
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Affiliation(s)
- Krishnan Nagarajan
- Department of Radio-Diagnosis, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Pondicherry, India
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Okazaki Y, Furumatsu T, Miyazawa S, Masuda S, Okazaki Y, Hiranaka T, Ozaki T. A novel suture technique to reduce the meniscus extrusion in the pullout repair for medial meniscus posterior root tears. Eur J Orthop Surg Traumatol 2019; 29:1805-1809. [PMID: 31350648 DOI: 10.1007/s00590-019-02513-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 07/22/2019] [Indexed: 11/29/2022]
Abstract
The medial meniscus (MM) posterior root has important functions in preventing an excessive loading stress during knee motion and degeneration of the articular cartilage. Although the transtibial pullout repair has become the gold standard for MM posterior root tears (MMPRTs), MM extrusion remains. In addition, during knee extension to deep flexion, the MM posterior segment in the MMPRT knee has been shown to translate toward the posteromedial direction, causing a notable MM posterior extrusion. Thus, the reduction in the MM posteromedial extrusion is one of the important postoperative outcomes to restore the meniscal function and eventually prevent the progression of knee osteoarthritis. The present technical note describes an arthroscopic technique addition to the pullout repair, in which an all-inside suture is inserted into the posteromedial part of the MM to reduce the MM posteromedial extrusion.
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Affiliation(s)
- Yoshiki Okazaki
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan.
| | - Shinichi Miyazawa
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - Shin Masuda
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - Yuki Okazaki
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - Takaaki Hiranaka
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
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Samim M, Eftekhary N, Vigdorchik JM, Elbuluk A, Davidovitch R, Youm T, Gyftopoulos S. 3D-MRI versus 3D-CT in the evaluation of osseous anatomy in femoroacetabular impingement using Dixon 3D FLASH sequence. Skeletal Radiol 2019; 48:429-436. [PMID: 30182297 DOI: 10.1007/s00256-018-3049-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 08/07/2018] [Accepted: 08/14/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine if hip 3D-MR imaging can be used to accurately demonstrate femoral and acetabular morphology in the evaluation of patients with femoroacetabular impingement. MATERIALS AND METHODS We performed a retrospective review at our institution of 17 consecutive patients (19 hips) with suspected femoroacetabular impingement who had both 3D-CT and 3D-MRI performed of the same hip. Two fellowship-trained musculoskeletal radiologists reviewed the imaging for the presence and location of cam deformity, anterior-inferior iliac spine variant, lateral center-edge angle, and neck-shaft angle. Findings on 3D-CT were considered the reference standard. The amount of radiation that was spared following introduction of 3D-MRI was also assessed. RESULTS All 17 patients suspected of FAI had evidence for cam deformity on 3D-CT. There was 100% agreement for diagnosis (19 out of 19) and location (19 out of 19) of cam deformity when comparing 3D-MRI with 3D-CT. There were 3 type I and 16 type II anterior-inferior iliac spine variants on 3D-CT imaging with 89.5% (17 out of 19) agreement for the anterior-inferior iliac spine characterization between 3D-MRI and 3D-CT. There was 64.7% agreement when comparing the neck-shaft angle (11 out of 17) and LCEA (11 out of 17) measurements. The use of 3D-MRI spared each patient an average radiation effective dose of 3.09 mSV for a total reduction of 479 mSV over a 4-year period. CONCLUSION 3D-MR imaging can be used to accurately diagnose and quantify the typical osseous pathological condition in femoroacetabular impingement and has the potential to eliminate the need for 3D-CT imaging and its associated radiation exposure, and the cost for this predominantly young group of patients.
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Affiliation(s)
- Mohammad Samim
- Department of Radiology, New York University Langone Medical Center, 333 East 38th street, New York, NY, 10016, USA.
| | - Nima Eftekhary
- Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10003, USA
| | - Jonathan M Vigdorchik
- Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10003, USA
| | - Ameer Elbuluk
- Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10003, USA
| | - Roy Davidovitch
- Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10003, USA
| | - Thomas Youm
- Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, 301 East 17th Street, New York, NY, 10003, USA
| | - Soterios Gyftopoulos
- Department of Radiology, New York University Langone Medical Center, 333 East 38th street, New York, NY, 10016, USA
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Abstract
A posterior staphyloma is an outpouching of a circumscribed region of the posterior fundus and has been considered a hallmark of pathologic myopia. Occurring in highly myopic eyes, it is histologically characterized by a relatively abrupt scleral thinning starting at the staphyloma edge, a pronounced de-arrangement of scleral collagen fibrils and a marked choroidal thinning, which is the most marked at the staphyloma edge and which occurs in addition to the axial elongation-associated choroidal thinning. Besides in highly myopic eyes, a posterior staphyloma can be found in non-highly myopic eyes in association with retinitis pigmentosa or localized defects of Bruch's membrane in the cases of which it is not associated with a marked choroidal thinning. The diagnosis of posterior staphylomas is considered best made by wide-field optical coherence tomography, because wide-field optical coherence tomography encompasses the entire extent of the most predominant type of staphylomas (i.e., the wide macular type) and since it also has a sufficiently high resolution of images (in contrast to ultrasonography, computed tomography and three-dimensional magnetic resonance imaging). While the etiology of posterior staphylomas has remained unclear, local choroidal factors and a locally decreased biomechanical resistance of the sclera against a posteriorly expanding Bruch's membrane have been one of the assumed pathogenic parameters. For the therapy of staphylomas, scleral reinforcement strategies such as by posterior encircling bands, posterior scleral collagen cross-linking or scleral regeneration have been discussed or performed, however, with the pathogenesis being elusive, the therapy of staphylomas has remained undetermined.
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Scheffler SU, Maschewski K, Becker R, Asbach P. In-vivo three-dimensional MR imaging of the intact anterior cruciate ligament shows a variable insertion pattern of the femoral and tibial footprints. Knee Surg Sports Traumatol Arthrosc 2018; 26:3667-72. [PMID: 29728742 DOI: 10.1007/s00167-018-4939-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 04/04/2018] [Indexed: 10/17/2022]
Abstract
PURPOSE Failure to reconstruct the natural footprints of the ruptured anterior cruciate ligament (ACL) may lead to premature graft-failure. Therefore, precise analyses of insertion site anatomy and inter-individual variations of the morphology of the ACL are highly important to facilitate optimal individualized graft placement. Therefore, the purpose of this study was to analyze the inter-individual variation of the morphology of the femoral and tibial ACL footprints. METHODS Thirty subjects with an intact ACL were included in this study for MR imaging of their knee joint. A three-dimensional (3D) dual-echo steady-state sequence with near 0.8 mm isotropic resolution was acquired on a 3 T system with a 15-channel knee-coil. The ACL was subsequently manually segmented using dedicated medical imaging software (VitreaAdvanced®, Vital Images). The lengths and widths of the footprints were measured after reconstructing an axial oblique (tibial footprint) or coronal oblique (femoral footprint) section at the bone-ligament junction and descriptive analysis was conducted to describe morphology orientation of the footprint. RESULTS The femoral footprint measured on average 14 mm ± 2 mm (range 8-19 mm) in length and 5 mm ± 1 mm (range 3-8 mm) in width. The mean value of the tibial footprint measured 10 mm ± 2 mm (range 5-14 mm) in length and 7 mm ± 2 mm (range 5-13 mm) in width. Descriptive analysis showed a stretched, ribbon-like appearance of the femoral footprint, while the tibial footprint revealed larger variability, stretching from anterolateral to posteromedial around the anterior horn of the lateral meniscus. CONCLUSION 3D imaging of the ACL footprints reveals a distinct difference in insertion site morphology and fiber bundle orientation between the femoral and tibial footprint. This questions the concept of strict anatomical separation of the ACL into an anteromedial and posterolateral bundle.
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Cacciola G, Anastasi G, Bertino S, Rizzo G, Cutroneo G, Trimarchi F, Pisani A, Cavaliere P, Barbanera A, Bruschetta D. Anatomical differences in the bony structure of L5 and L4: A possible classification according to the lateral tilt of the pedicles. J Orthop 2018; 15:205-209. [PMID: 29657469 DOI: 10.1016/j.jor.2018.01.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 09/27/2017] [Accepted: 01/14/2018] [Indexed: 10/18/2022] Open
Abstract
The aim of this study is to underline the necessity of a better knowledge of pedicles anatomy in order to improve surgical treatment of spine disorders such us low back pain, spinal fractures and scholiosis. A classification of pedicles lateral tilt which could help surgeons before the application of screws during transpedicular fixation is reported. Anatomical differences in the orientiation of the pedicles of L5 and L4 have been found. For each patient that met the inclusion criteria underwent: Radiography of the lumbo-sacral region, CT examination, MRI acquisition. Patients were divided into three categories thanks to 3D direct volume rendering of CT scan. Subjects belonged to W-Type, V-Type and U-type depending on their morphometric features. The subdivision was further implemented with measurements of the distance between pedicles and adjacent nervous structures. Concerning L5, W-Type (WT) exhibited a lateral tilt of L5 larger than 36°, V-Type exhibited a lateral tilt of L5 from 30° to 36°, U-type exhibited a lateral tilt of L5 smaller than 30°. Concerning L4, WT exhibited a lateral tilt of 28.4°, VT exhibited a lateral tilt of of 25.1, UT exhibited a lateral tilt of 22.2°; we assume that the degree of lateralization of L4 depends on the one of L5. The way the screw is applied during surgical treatment is clinically relevant, thus our classification may be very useful in order to decrease surgical risk and improve conditions of patients after surgical treatment.
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Affiliation(s)
- Giorgio Cacciola
- University of Messina, Department of Biomedical, Dental Sciences and Morphological and Functional Images, Messina, Italy
| | - Giuseppe Anastasi
- University of Messina, Department of Biomedical, Dental Sciences and Morphological and Functional Images, Messina, Italy
| | - Salvatore Bertino
- University of Messina, Department of Biomedical, Dental Sciences and Morphological and Functional Images, Messina, Italy
| | - Giuseppina Rizzo
- University of Messina, Department of Biomedical, Dental Sciences and Morphological and Functional Images, Messina, Italy
| | - Giuseppina Cutroneo
- University of Messina, Department of Biomedical, Dental Sciences and Morphological and Functional Images, Messina, Italy
| | - Fabio Trimarchi
- University of Messina, Department of Biomedical, Dental Sciences and Morphological and Functional Images, Messina, Italy
| | - Alessandro Pisani
- Istituto Ortopedico del Mezzogiorno d'Italia "Franco Scalabrino", Dipartimento di Chirurgia Vertebrale, Messina, Italy
| | - Pietro Cavaliere
- Istituto Ortopedico del Mezzogiorno d'Italia "Franco Scalabrino", Dipartimento di Chirurgia Vertebrale, Messina, Italy
| | - Andrea Barbanera
- A.O.N. SS Antonio Biagio e Cesare Arrigo, Dipartimento di Neurochirurgia, Alessandria, Italy
| | - Daniele Bruschetta
- University of Messina, Department of Biomedical, Dental Sciences and Morphological and Functional Images, Messina, Italy.,IRCCS Neurolesi "Bonino Pulejo", Messina, Italy
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Standefer KD, Dempsey M, Jo C, Kim HKW. 3D MRI Quantification of Femoral Head Deformity in Legg-Calvé-Perthes Disease. J Orthop Res 2017; 35:2051-2058. [PMID: 27864891 DOI: 10.1002/jor.23484] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 11/10/2016] [Indexed: 02/04/2023]
Abstract
The purpose of this study was to quantify femoral head deformity in patients with Legg-Calvé-Perthes disease (LCPD) using a novel three dimensional (3D) magnetic resonance imaging (MRI) reconstruction and volume based analysis. Bilateral femoral heads of 17 patients (mean age 9.9 ± 2.0 years; 12 boys, 5 girls) with LCPD were scanned 1-2 times (n = 33 LCPD heads, 20 normal heads) using a 1.5T MRI scanner. Fourteen patients had unilateral and three had bilateral LCPD with five hips in the Waldenström initial stage, 9 in the fragmentation stage, 14 in the reossification stage, and 5 in the healed stage. 3D digital reconstructions of femoral heads were created using MIMICS software. Deformity was quantified using a 3D volume ratio method based on reference hemisphere volume as well as two surface geometry methods. Intra-observer analysis showed that 97% of the LCPD femoral heads were within 10% of the original value and test shapes had 99.6% accuracy. For normal femoral heads, the volume ratios of all except one were between 95 and 98% (n = 20) of a perfect hemisphere volume. For femoral heads affected with LCPD, the volume ratios ranged from 43% to 96% of a perfect hemisphere (n = 33). The volume ratio method and the two surface geometry comparison methods had high correlation (r = 0.89 and 0.96). In summary, the 3D MRI volume ratio method allowed accurate quantification and demonstrated small changes (<10%) of the femoral head deformity in LCPD. This method may serve as a useful tool to evaluate the effects of treatment on femoral head shape. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2051-2058, 2017.
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Affiliation(s)
| | - Molly Dempsey
- Texas Scottish Rite Hospital for Children, Dallas, Texas
| | - ChanHee Jo
- Texas Scottish Rite Hospital for Children, Dallas, Texas
| | - Harry K W Kim
- Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital for Children, 2222 Welborn Street, Dallas 75219, Texas.,Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center, Texas
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Sigovan M, Bidet C, Bros S, Boussel L, Mechtouff L, Robson PM, Fayad ZA, Millon A, Douek P. 3D black blood MR angiography of the carotid arteries. A simple sequence for plaque hemorrhage and stenosis evaluation. Magn Reson Imaging 2017. [PMID: 28629953 DOI: 10.1016/j.mri.2017.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVES To evaluate the diagnostic performance of a new three-dimensional T1-weighted turbo-spin-echo sequence (3D T1-w TSE) compared to 3D contrast-enhanced angiography (CE-MRA) for stenosis measurement and compared to 2D T1-w TSE for intra-plaque hemorrhage (IPH) detection. METHODS Eighty three patients underwent carotid MRI, using a new elliptic-centric phase encoding T1-weighted 3D TSE sequence in addition to the clinical protocol. Two observers evaluated image quality, presence of flow artifacts, and presence of intra-plaque hemorrhage, and computed the NASCET degree of stenosis for CE-MRA and for the new sequence. Inter-observer agreement and correlation between 3D TSE and CE-MRA for NASCET stenosis was estimated using Cohen's kappa, and correlation using linear regression and Bland-Altman plots. Histology was performed on endarterectomy samples for 18 patients. Sensitivity and specificity of 2D and 3D TSE for IPH diagnosis were computed. RESULTS 3D TSE showed better image quality than 2D TSE (p<0.05). Interobserver agreement was good (kappa≥0.86). Correlation between 3D TSE and CE-MRA was excellent (R=0.95) for NASCET stenosis. Sensitivity and specificity for IPH diagnosis was 50% and 100% for 2D TSE and 100% and 83% for the 3D TSE. CONCLUSIONS The new 3D T1-w TSE allows both reliable measures of carotid stenosis, with a slight overestimation compared to CE-MRA (5%), and improved IPH identification, compared to 2D TSE.
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Affiliation(s)
- Monica Sigovan
- CNRS UMR5220; CREATIS Laboratory, University of Lyon, Inserm U1044, INSA-Lyon, Université Lyon 1; Hospices Civils de Lyon, France.
| | - Clément Bidet
- University of Lyon, Department of Radiology, Hospices Civils de Lyon, France
| | - Sébastien Bros
- University of Lyon, Department of Radiology, Hospices Civils de Lyon, France
| | - Loic Boussel
- CNRS UMR5220; CREATIS Laboratory, University of Lyon, Inserm U1044, INSA-Lyon, Université Lyon 1; Hospices Civils de Lyon, France; University of Lyon, Department of Radiology, Hospices Civils de Lyon, France
| | - Laura Mechtouff
- University of Lyon, Department of Vascular Neurology, Hospices Civils de Lyon, France
| | - Philip M Robson
- Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Zahi A Fayad
- Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Antoine Millon
- University of Lyon, Department of Vascular Surgery, Hospices Civils de Lyon, France
| | - Philippe Douek
- CNRS UMR5220; CREATIS Laboratory, University of Lyon, Inserm U1044, INSA-Lyon, Université Lyon 1; Hospices Civils de Lyon, France; University of Lyon, Department of Radiology, Hospices Civils de Lyon, France
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Nordeck SM, Koerper CE, Adler A, Malhotra V, Xi Y, Liu GT, Chhabra A. Simulated radiographic bone and joint modeling from 3D ankle MRI: feasibility and comparison with radiographs and 2D MRI. Skeletal Radiol 2017; 46:651-664. [PMID: 28265698 DOI: 10.1007/s00256-017-2596-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 12/30/2016] [Accepted: 02/08/2017] [Indexed: 02/02/2023]
Abstract
PURPOSE The purpose of this work is to simulate radiographs from isotropic 3D MRI data, compare relationship of angle and joint space measurements on simulated radiographs with corresponding 2D MRIs and real radiographs (XR), and compare measurement times among the three modalities. MATERIALS AND METHODS Twenty-four consecutive ankles were included, eight males and 16 females, with a mean age of 46 years. Segmented joint models simulating radiographs were created from 3D MRI data sets. Three readers independently performed blinded angle and joint space measurements on the models, corresponding 2D MRIs, and XRs at two time points. Linear mixed models and the intraclass correlation coefficient (ICC) was ascertained, with p values less than 0.05 considered significant. RESULTS Simulated radiograph models were successfully created in all cases. Good agreement (ICC > 0.65) was noted among all readers across all modalities and among most measurements. Absolute measurement values differed between modalities. Measurement time was significantly greater (p < 0.05) on 2D versus simulated radiographs for most measurements and on XR versus simulated radiographs (p < 0.05) for nearly half the measurements. CONCLUSIONS Simulated radiographs can be successfully generated from 3D MRI data; however, measurements differ. Good inter-reader and moderate-to-good intra-reader reliability was observed and measurements obtained on simulated radiograph models took significantly less time compared to measurements with 2D and generally less time than XR.
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Affiliation(s)
- Shaun M Nordeck
- University of Texas Southwestern Medical College, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA. .,Musculoskeletal Radiology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | - Conrad E Koerper
- University of Texas Southwestern Medical College, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA
| | - Aaron Adler
- University of Texas Southwestern Medical College, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA
| | - Vidur Malhotra
- Musculoskeletal Radiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Yin Xi
- Musculoskeletal Radiology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - George T Liu
- Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Avneesh Chhabra
- Musculoskeletal Radiology, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Markiewicz E, Fan X, Mustafi D, Zamora M, Conzen SD, Karczmar GS. MRI ductography of contrast agent distribution and leakage in normal mouse mammary ducts and ducts with in situ cancer. Magn Reson Imaging 2017; 40:48-52. [PMID: 28366759 DOI: 10.1016/j.mri.2017.03.009] [Citation(s) in RCA: 4] [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: 08/10/2016] [Revised: 03/28/2017] [Accepted: 03/30/2017] [Indexed: 11/29/2022]
Abstract
High resolution 3D MRI was used to study contrast agent distribution and leakage in normal mouse mammary glands and glands containing in situ cancer after intra-ductal injection. Five female FVB/N mice (~19weeks old) with no detectable mammary cancer and eight C3(1) SV40 Tag virgin female mice (~15weeks old) with extensive in situ cancer were studied. A 34G, 45° tip Hamilton needle with a 25μL Hamilton syringe was inserted into the tip of the nipple and approximately 15μL of a Gadodiamide was injected slowly over 1min into the nipple and throughout the duct on one side of the inguinal gland. Following injection, the mouse was placed in a 9.4T MRI scanner, and a series of high resolution 3D T1-weighted images was acquired with a temporal resolution of 9.1min to follow contrast agent leakage from the ducts. The first image was acquired at about 12min after injection. Ductal enhancement regions detected in images acquired between 12 and 21min after contrast agent injection was five times smaller in SV40 mouse mammary ducts (p<0.001) than in non-cancerous FVB/N mouse mammary ducts, perhaps due to rapid washout of contrast agent from the SV40 ducts. The contrast agent washout rate measured between 12min and 90min after injection was ~20% faster (p<0.004) in SV40 mammary ducts than in FVB/N mammary ducts. These results may be due to higher permeability of the SV40 ducts, likely due to the presence of in situ cancers. Therefore, increased permeability of ducts may indicate early stage breast cancers.
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Affiliation(s)
- Erica Markiewicz
- Department of Radiology, University of Chicago, Chicago, IL, USA
| | - Xiaobing Fan
- Department of Radiology, University of Chicago, Chicago, IL, USA
| | - Devkumar Mustafi
- Department of Radiology, University of Chicago, Chicago, IL, USA
| | - Marta Zamora
- Department of Radiology, University of Chicago, Chicago, IL, USA
| | - Suzanne D Conzen
- Medicine, Hematology/Oncology, University of Chicago, Chicago, IL, USA
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Altahawi FF, Blount KJ, Morley NP, Raithel E, Omar IM. Comparing an accelerated 3D fast spin-echo sequence (CS-SPACE) for knee 3-T magnetic resonance imaging with traditional 3D fast spin-echo (SPACE) and routine 2D sequences. Skeletal Radiol 2017; 46:7-15. [PMID: 27744578 DOI: 10.1007/s00256-016-2490-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 08/19/2016] [Accepted: 09/14/2016] [Indexed: 02/02/2023]
Abstract
PURPOSE To compare a faster, new, high-resolution accelerated 3D-fast-spin-echo (3D-FSE) acquisition sequence (CS-SPACE) to traditional 2D and high-resolution 3D sequences for knee 3-T magnetic resonance imaging (MRI). MATERIALS AND METHODS Twenty patients received knee MRIs that included routine 2D (T1, PD ± FS, T2-FS; 0.5 × 0.5 × 3 mm3; ∼10 min), traditional 3D FSE (SPACE-PD-FS; 0.5 × 0.5 × 0.5 mm3; ∼7.5 min), and accelerated 3D-FSE prototype (CS-SPACE-PD-FS; 0.5 × 0.5 × 0.5 mm3; ∼5 min) acquisitions on a 3-T MRI system (Siemens MAGNETOM Skyra). Three musculoskeletal radiologists (MSKRs) prospectively and independently reviewed the studies with graded surveys comparing image and diagnostic quality. Tissue-specific signal-to-noise ratios (SNR) and contrast-to-noise ratios (CNR) were also compared. RESULTS MSKR-perceived diagnostic quality of cartilage was significantly higher for CS-SPACE than for SPACE and 2D sequences (p < 0.001). Assessment of diagnostic quality of menisci and synovial fluid was higher for CS-SPACE than for SPACE (p < 0.001). CS-SPACE was not significantly different from SPACE but had lower assessments than 2D sequences for evaluation of bones, ligaments, muscles, and fat (p ≤ 0.004). 3D sequences had higher spatial resolution, but lower overall assessed contrast (p < 0.001). Overall image quality from CS-SPACE was assessed as higher than SPACE (p = 0.007), but lower than 2D sequences (p < 0.001). Compared to SPACE, CS-SPACE had higher fluid SNR and CNR against all other tissues (all p < 0.001). CONCLUSIONS The CS-SPACE prototype allows for faster isotropic acquisitions of knee MRIs over currently used protocols. High fluid-to-cartilage CNR and higher spatial resolution over routine 2D sequences may present a valuable role for CS-SPACE in the evaluation of cartilage and menisci.
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Affiliation(s)
- Faysal F Altahawi
- Department of Radiology, Northwestern University Feinberg School of Medicine, 676 N Saint Clair St Suite 800, Chicago, IL, 60611, USA.
| | - Kevin J Blount
- Department of Radiology, Northwestern University Feinberg School of Medicine, 676 N Saint Clair St Suite 800, Chicago, IL, 60611, USA
| | | | | | - Imran M Omar
- Department of Radiology, Northwestern University Feinberg School of Medicine, 676 N Saint Clair St Suite 800, Chicago, IL, 60611, USA
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Zhang X, Li M, Guan J, Wang H, Li S, Guo Y, Liu M. Evaluation of the sacral nerve plexus in pelvic endometriosis by three-dimensional MR neurography. J Magn Reson Imaging 2016; 45:1225-1231. [PMID: 27666420 DOI: 10.1002/jmri.25435] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 05/01/2016] [Accepted: 08/08/2016] [Indexed: 11/11/2022] Open
Abstract
PURPOSE To investigate the feasibility of three-dimensional MR neurography (3D MRN) for the sacral plexus using sampling perfection with application-optimized contrasts using different flip angle evolution (SPACE) sequences, and to demonstrate structural abnormalities in the pelvic nerve of women with pelvic endometriosis. MATERIALS AND METHODS Twenty patients with pelvic endometriosis and 20 healthy controls were examined by contrast-enhanced 3D short time inversion recovery T2-weighted imaging (CE 3D STIR T2WI) SPACE sequences on 3 Tesla MRI. Image quality and diagnostic confidence of the sequences in identifying abnormalities of the sacral plexus were analyzed and compared with conventional three-plane images of 2D turbo-spin echo T2-weighted images (2D TSE T2WI). The changes in the sacral plexus caused by endometrial lesions were evaluated. RESULTS The sacral plexus was clearly revealed in both healthy controls and patients with endometriosis on 3D STIR SPACE images. A good agreement was reached in the evaluation of both imaging quality (Kappa value [κ] = 0.73-1.00) and diagnostic confidence (κ = 0.66-0.81) when compared between the two independent readers. Abnormalities caused by endometriosis were identified in 17 patients, unilaterally in 10 patients, and bilaterally in 7 patients. Nerve fiber abnormalities of lumbar 5 (L5) were detected in 11 patients, of sacral 1 (S1) in 14 patients and of sacral 2 (S2) in 9 patients. CONCLUSION CE 3D STIR SPACE sequences demonstrate its significant capacity to investigate and map the sacral plexus, and reveal the compression and adhesion of the sacral plexus nerve as a result of ectopic lesions. LEVEL OF EVIDENCE 3 J. Magn. Reson. Imaging 2017;45:1225-1231.
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Affiliation(s)
- Xiaoling Zhang
- Department of Radiology, First affiliated hospital of Sun Yat-sen University, Guangzhou, China
| | - Meizhi Li
- Department of Radiology, First affiliated hospital of Sun Yat-sen University, Guangzhou, China
| | - Jian Guan
- Department of Radiology, First affiliated hospital of Sun Yat-sen University, Guangzhou, China
| | - Huanjun Wang
- Department of Radiology, First affiliated hospital of Sun Yat-sen University, Guangzhou, China
| | - Shurong Li
- Department of Radiology, First affiliated hospital of Sun Yat-sen University, Guangzhou, China
| | - Yan Guo
- Department of Radiology, First affiliated hospital of Sun Yat-sen University, Guangzhou, China
| | - Mingjuan Liu
- Department of Radiology, First affiliated hospital of Sun Yat-sen University, Guangzhou, China
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Delavan JA, Stence NV, Mirsky DM, Gralla J, Fadell MF. Confidence in Assessment of Lumbar Spondylolysis Using Three-Dimensional Volumetric T2-Weighted MRI Compared With Limited Field of View, Decreased-Dose CT. Sports Health 2016; 8:364-71. [PMID: 27282808 PMCID: PMC4922525 DOI: 10.1177/1941738116653587] [Citation(s) in RCA: 8] [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] [Indexed: 11/19/2022] Open
Abstract
Background: Limited z-axis–coverage computed tomography (CT) to evaluate for pediatric lumbar spondylolysis, altering the technique such that the dose to the patient is comparable or lower than radiographs, is currently used at our institution. The objective of the study was to determine whether volumetric 3-dimensional fast spin echo magnetic resonance imaging (3D MRI) can provide equal or greater diagnostic accuracy compared with limited CT in the diagnosis of pediatric lumbar spondylolysis without ionizing radiation. Hypothesis: Volumetric 3D MRI can provide equal or greater diagnostic accuracy compared with low-dose CT for pediatric lumbar spondylolysis without ionizing radiation. Study Design: Clinical review. Level of Evidence: Level 2. Methods: Three pediatric neuroradiologists evaluated 2-dimensional (2D) MRI, 2D + 3D MRI, and limited CT examinations in 42 pediatric patients who obtained imaging for low back pain and suspected spondylolysis. As there is no gold standard for the diagnosis of spondylolysis besides surgery, interobserver agreement and degree of confidence were compared to determine which modality is preferable. Results: Decreased-dose CT provided a greater level of agreement than 2D MRI and 2D + 3D MRI. The kappa for rater agreement with 2D MRI, 2D + 3D MRI, and CT was 0.19, 0.32, and 1.0, respectively. All raters agreed in 31%, 40%, and 100% of cases with 2D MRI, 2D + 3D MRI, and CT. Lack of confidence was significantly lower with CT (0%) than with 2D MRI (30%) and 2D + 3D MRI (25%). Conclusion: For diagnosing spondylolysis, radiologist agreement and confidence trended toward improvement with the addition of a volumetric 3D MRI sequence to standard 2D MRI sequences compared with 2D MRI alone; however, agreement and confidence remain significantly greater using decreased-dose CT when compared with either MRI acquisition. Clinical Relevance: Decreased-dose CT of the lumbar spine remains the optimal examination to confirm a high suspicion of spondylolysis, with dose essentially equivalent to radiographs. If clinical symptoms are not classic for spondylolysis, 2D MRI is still very good at detecting spondylolysis while remaining sensitive for detection of alternative diagnoses such as disc abnormalities and pars stress reaction. The data suggest that standard 2D MRI sequences should not be entirely replaced by a volumetric T2-weighted 3D sequence (despite promising features of rapid acquisition time, increased spatial resolution, and reconstruction capability).
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Affiliation(s)
| | - Nicholas V Stence
- Department of Radiology, Children's Hospital Colorado, Aurora, Colorado
| | - David M Mirsky
- Department of Radiology, Children's Hospital Colorado, Aurora, Colorado
| | - Jane Gralla
- Department of Pediatrics, School of Medicine, Colorado School of Public Health, University of Colorado Denver, Aurora, Colorado Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Denver, Aurora, Colorado
| | - Michael F Fadell
- Department of Radiology, Children's Hospital Colorado, Aurora, Colorado
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Abstract
BACKGROUND Denoising is the primary preprocessing step for subsequent application of MRI. However, most commonly-used patch-based denoising methods are heavily dependent on the degree of patch matching. Due to the large number of voxels in the 3D MRI dataset, the procedure of searching sufficient similarity patches was limited by the empirical compromising between computational efficiency and estimation accuracy, and cannot fulfill the application in multimodal MRI dataset with different SNR and resolutions. METHODS In this study, we propose a modified global filtering framework for 3D MRI. For each denoising voxel, the similarity weighting matrix is computed using the reference patch and other patches from the whole dataset. This large weighting matrix is then approximated using the k-means clustering Nyström method to achieve computational viability. RESULTS Experiments on both synthetic and in vivo MRI datasets demonstrated that the proposed adaptive Nyström low-rank approximation could achieve competitive estimation compared with exact global filter while reducing the sampling rate by four orders of magnitude. In addition, the corresponding global filter improved patches-based method in both spatial and transform domain. CONCLUSION We propose a global denoising framework for 3D MRI which extracts information from the entire dataset to restore each voxel. This large weighting matrix of the global filter is approximated using Nyström low-rank approximation with an adaptive k-means clustering sampling scheme, which significantly reduce the sampling rate as well as the running time. The proposed method is capable of denoising in multimodal MRI dataset and can be used to improve currently used patch-based methods.
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Gyftopoulos S, Beltran LS, Gibbs K, Jazrawi L, Berman P, Babb J, Meislin R. Rotator cuff tear shape characterization: a comparison of two-dimensional imaging and three-dimensional magnetic resonance reconstructions. J Shoulder Elbow Surg 2016; 25:22-30. [PMID: 26321483 DOI: 10.1016/j.jse.2015.03.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/14/2015] [Accepted: 03/18/2015] [Indexed: 02/01/2023]
Abstract
BACKGROUND The purpose of this study was to see if 3-dimensional (3D) magnetic resonance imaging (MRI) could improve our understanding of rotator cuff tendon tear shapes. We believed that 3D MRI would be more accurate than two-dimensional (2D) MRI for classifying tear shapes. METHODS We performed a retrospective review of MRI studies of patients with arthroscopically proven full-thickness rotator cuff tears. Two orthopedic surgeons reviewed the information for each case, including scope images, and characterized the shape of the cuff tear into crescent, longitudinal, U- or L-shaped longitudinal, and massive type. Two musculoskeletal radiologists reviewed the corresponding MRI studies independently and blind to the arthroscopic findings and characterized the shape on the basis of the tear's retraction and size using 2D MRI. The 3D reconstructions of each cuff tear were reviewed by each radiologist to characterize the shape. Statistical analysis included 95% confidence intervals and intraclass correlation coefficients. RESULTS The study reviewed 34 patients. The accuracy for differentiating between crescent-shaped, longitudinal, and massive tears using measurements on 2D MRI was 70.6% for reader 1 and 67.6% for reader 2. The accuracy for tear shape characterization into crescent and longitudinal U- or L-shaped using 3D MRI was 97.1% for reader 1 and 82.4% for reader 2. When further characterizing the longitudinal tears as massive or not using 3D MRI, both readers had an accuracy of 76.9% (10 of 13). The overall accuracy of 3D MRI was 82.4% (56 of 68), significantly different (P = .021) from 2D MRI accuracy (64.7%). CONCLUSION Our study has demonstrated that 3D MR reconstructions of the rotator cuff improve the accuracy of characterizing rotator cuff tear shapes compared with current 2D MRI-based techniques.
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Affiliation(s)
| | - Luis S Beltran
- Department of Radiology, NYU Langone Medical Center, New York, NY, USA
| | - Kevin Gibbs
- Department of Radiology, NYU Langone Medical Center, New York, NY, USA
| | - Laith Jazrawi
- Department of Orthopaedic Surgery, NYU Langone Medical Center, New York, NY, USA
| | - Phillip Berman
- Department of Radiology, NYU Langone Medical Center, New York, NY, USA
| | - James Babb
- Department of Radiology, NYU Langone Medical Center, New York, NY, USA
| | - Robert Meislin
- Department of Orthopaedic Surgery, NYU Langone Medical Center, New York, NY, USA
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Vik A, Hodneland E, Haász J, Ystad M, Lundervold AJ, Lundervold A. Fractional anisotropy shows differential reduction in frontal-subcortical fiber bundles-A longitudinal MRI study of 76 middle-aged and older adults. Front Aging Neurosci 2015; 7:81. [PMID: 26029102 PMCID: PMC4432666 DOI: 10.3389/fnagi.2015.00081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 07/01/2014] [Accepted: 04/27/2015] [Indexed: 01/30/2023] Open
Abstract
Motivated by the frontal- and white matter (WM) retrogenesis hypotheses and the assumptions that fronto-striatal circuits are especially vulnerable in normal aging, the goal of the present study was to identify fiber bundles connecting subcortical nuclei and frontal areas and obtain site-specific information about age related fractional anisotropy (FA) changes. Multimodal magnetic resonance image acquisitions [3D T1-weighted and diffusion weighted imaging (DWI)] were obtained from healthy older adults (N = 76, range 49-80 years at inclusion) at two time points, 3 years apart. A subset of the participants (N = 24) was included at a third time-point. In addition to the frontal-subcortical fibers, the anterior callosal fiber (ACF) and the corticospinal tract (CST) was investigated by its mean FA together with tract parameterization analysis. Our results demonstrated fronto-striatal structural connectivity decline (reduced FA) in normal aging with substantial inter-individual differences. The tract parameterization analysis showed that the along tract FA profiles were characterized by piece-wise differential changes along their extension rather than being uniformly affected. To the best of our knowledge, this is the first longitudinal study detecting age-related changes in frontal-subcortical WM connections in normal aging.
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Affiliation(s)
- Alexandra Vik
- Department of Biological and Medical Psychology, University of Bergen Bergen, Norway ; Department of Biomedicine, University of Bergen Bergen, Norway
| | | | - Judit Haász
- Department of Biological and Medical Psychology, University of Bergen Bergen, Norway ; Department of Biomedicine, University of Bergen Bergen, Norway ; Department of Clinical Medicine, University of Bergen Bergen, Norway
| | - Martin Ystad
- Department of Biomedicine, University of Bergen Bergen, Norway
| | - Astri J Lundervold
- Department of Biological and Medical Psychology, University of Bergen Bergen, Norway ; Kavli Research Center of Aging and Dementia, Haraldsplass Deaconess Hospital Bergen, Norway
| | - Arvid Lundervold
- Department of Biomedicine, University of Bergen Bergen, Norway ; Department of Radiology, Haukeland University Hospital Bergen, Norway
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Li G, Hennig J, Raithel E, Büchert M, Paul D, Korvink JG, Zaitsev M. An L1-norm phase constraint for half-Fourier compressed sensing in 3D MR imaging. MAGMA 2015; 28:459-72. [PMID: 25712732 DOI: 10.1007/s10334-015-0482-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 12/15/2014] [Accepted: 01/29/2015] [Indexed: 12/22/2022]
Abstract
OBJECTIVE In most half-Fourier imaging methods, explicit phase replacement is used. In combination with parallel imaging, or compressed sensing, half-Fourier reconstruction is usually performed in a separate step. The purpose of this paper is to report that integration of half-Fourier reconstruction into iterative reconstruction minimizes reconstruction errors. MATERIALS AND METHODS The L1-norm phase constraint for half-Fourier imaging proposed in this work is compared with the L2-norm variant of the same algorithm, with several typical half-Fourier reconstruction methods. Half-Fourier imaging with the proposed phase constraint can be seamlessly combined with parallel imaging and compressed sensing to achieve high acceleration factors. RESULTS In simulations and in in-vivo experiments half-Fourier imaging with the proposed L1-norm phase constraint enables superior performance both reconstruction of image details and with regard to robustness against phase estimation errors. CONCLUSION The performance and feasibility of half-Fourier imaging with the proposed L1-norm phase constraint is reported. Its seamless combination with parallel imaging and compressed sensing enables use of greater acceleration in 3D MR imaging.
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Affiliation(s)
- Guobin Li
- Department of Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Straße 60a, 79106, Freiburg, Germany.
| | - Jürgen Hennig
- Department of Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Straße 60a, 79106, Freiburg, Germany
| | | | - Martin Büchert
- Department of Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Straße 60a, 79106, Freiburg, Germany
| | | | - Jan G Korvink
- Department of Microsystems Engineering-IMTEK, University of Freiburg, Freiburg, Germany
| | - Maxim Zaitsev
- Department of Radiology, Medical Physics, University Medical Center Freiburg, Breisacher Straße 60a, 79106, Freiburg, Germany
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Truong ML, Harrington MG, Schepkin VD, Chekmenev EY. Sodium 3D COncentration MApping (COMA 3D) using (23)Na and proton MRI. J Magn Reson 2014; 247:88-95. [PMID: 25261742 PMCID: PMC4198170 DOI: 10.1016/j.jmr.2014.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 07/21/2014] [Accepted: 08/25/2014] [Indexed: 06/03/2023]
Abstract
Functional changes of sodium 3D MRI signals were converted into millimolar concentration changes using an open-source fully automated MATLAB toolbox. These concentration changes are visualized via 3D sodium concentration maps, and they are overlaid over conventional 3D proton images to provide high-resolution co-registration for easy correlation of functional changes to anatomical regions. Nearly 5000/h concentration maps were generated on a personal computer (ca. 2012) using 21.1T 3D sodium MRI brain images of live rats with spatial resolution of 0.8×0.8×0.8 mm(3) and imaging matrices of 60×60×60. The produced concentration maps allowed for non-invasive quantitative measurement of in vivo sodium concentration in the normal rat brain as a functional response to migraine-like conditions. The presented work can also be applied to sodium-associated changes in migraine, cancer, and other metabolic abnormalities that can be sensed by molecular imaging. The MATLAB toolbox allows for automated image analysis of the 3D images acquired on the Bruker platform and can be extended to other imaging platforms. The resulting images are presented in a form of series of 2D slices in all three dimensions in native MATLAB and PDF formats. The following is provided: (a) MATLAB source code for image processing, (b) the detailed processing procedures, (c) description of the code and all sub-routines, (d) example data sets of initial and processed data. The toolbox can be downloaded at: http://www.vuiis.vanderbilt.edu/~truongm/COMA3D/.
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Affiliation(s)
- Milton L Truong
- Department of Radiology, Vanderbilt University Institute of Imaging Science (VUIIS), Nashville, TN 37232, USA.
| | - Michael G Harrington
- Huntington Medical Research Institutes, 99 North El Molino Ave, Pasadena, CA 91101, USA
| | - Victor D Schepkin
- National High Magnetic Field Laboratory (NHMFL), Florida State University, 1800 E Paul Dirac Drive, Tallahassee, FL 32310, USA
| | - Eduard Y Chekmenev
- Department of Radiology, Vanderbilt University Institute of Imaging Science (VUIIS), Nashville, TN 37232, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA; Department of Biochemistry, Vanderbilt University, Nashville, TN 37205, USA; Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, TN 37232, USA.
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Markiewicz E, Fan X, Mustafi D, Zamora M, Roman BB, Jansen SA, Macleod K, Conzen SD, Karczmar GS. High resolution 3D MRI of mouse mammary glands with intra-ductal injection of contrast media. Magn Reson Imaging 2014; 33:161-5. [PMID: 25179139 DOI: 10.1016/j.mri.2014.08.035] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 08/11/2014] [Indexed: 10/24/2022]
Abstract
The purpose of this study was to use high resolution three-dimensional (3D) magnetic resonance imaging (MRI) to study mouse mammary gland ductal architecture based on intra-ductal injection of contrast agents. Female FVB/N mice age 12-20 weeks (n=12), were used in this study. A 34G, 45° tip Hamilton needle with a 25μL Hamilton syringe was inserted into the tip of the nipple. Approximately 20-25μL of a Gadodiamide/Trypan blue/saline solution was injected slowly over one minute into the nipple and duct. To prevent washout of contrast media from ducts due to perfusion, and maximize the conspicuity of ducts on MRI, mice were sacrificed one minute after injection. High resolution 3D T1-weighted images were acquired on a 9.4T Bruker scanner after sacrifice to eliminate motion artifacts and reduce contrast media leakage from ducts. Trypan blue staining was well distributed throughout the ductal tree. MRI showed the mammary gland ductal structure clearly. In spoiled gradient echo T1-weighted images, the signal-to-noise ratio of regions identified as enhancing mammary ducts following contrast injection was significantly higher than that of muscle (p<0.02) and significantly higher than that of contralateral mammary ducts that were not injected with contrast media (p<0.0001). The methods described here could be adapted for injection of specialized contrast agents to measure metabolism or target receptors in normal ducts and ducts with in situ cancers.
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Affiliation(s)
- Erica Markiewicz
- Department of Radiology, The University of Chicago, Chicago, IL, USA
| | - Xiaobing Fan
- Department of Radiology, The University of Chicago, Chicago, IL, USA
| | - Devkumar Mustafi
- Department of Radiology, The University of Chicago, Chicago, IL, USA
| | - Marta Zamora
- Department of Radiology, The University of Chicago, Chicago, IL, USA
| | - Brian B Roman
- Department of Radiology, The University of Chicago, Chicago, IL, USA
| | - Sanaz A Jansen
- Department of Radiology, The University of Chicago, Chicago, IL, USA
| | - Kay Macleod
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, USA
| | - Suzanne D Conzen
- Medicine, Hematology/Oncology, The University of Chicago, Chicago, IL, USA
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Swami VG, Cheng-Baron J, Hui C, Thompson R, Jaremko JL. Reliability of estimates of ACL attachment locations in 3-dimensional knee reconstruction based on routine clinical MRI in pediatric patients. Am J Sports Med 2013; 41:1319-29. [PMID: 23576685 DOI: 10.1177/0363546513482298] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Current techniques of anterior cruciate ligament (ACL) reconstruction focus on the placement of femoral and tibial tunnels at anatomic ACL attachments, which can be difficult to identify intraoperatively. PURPOSE To determine whether the 3-dimensional (3D) center of ACL attachments can be reliably detected from routine magnetic resonance imaging (MRI) in patients with intact ACLs and whether the reliability of this technique changes if the ACL is torn. STUDY DESIGN Cohort study (diagnosis); Level of evidence, 3. METHODS A computer technique was developed in which users identify points along ACL attachments on routine clinical MRI of preoperative knees. These attachments are then displayed on a 3D MRI reconstruction, which can be used as a visual guide for the surgeon during arthroscopic surgery. Thirty-seven pediatric patients (age range, 10-17 years) with ACL tears and 37 controls with intact ACLs were examined. Two blinded observers identified cruciate ligament attachments on routine clinical 1.5-T MRI of knees. From the resulting 3D model, the location of the center of each ligament attachment site and its area were calculated and reliability assessed. RESULTS Mean interobserver variation of the centers of ACL attachments for the intact versus torn ACL was 1.7 ± 0.9 mm versus 1.8 ± 1.1 mm (femoral) and 1.4 ± 0.9 mm versus 1.7 ± 1.0 mm (tibial), respectively (P > .05). The 95% confidence interval for the center location was at most 4 mm. The identified ACL attachment areas were more variable, with interobserver reliability ranging from fair to excellent by the intraclass correlation coefficient. Overlap of ligament areas between observers for the intact versus torn ACL was 70% ± 15% versus 73% ± 12% (femoral) and 79% ± 9% versus 78% ± 10% (tibial), respectively (P > .05). In all cases, intraobserver reliability was superior to interobserver reliability. CONCLUSION The 3D locations of ACL tibial and femoral attachment centers were identified from routine clinical MRI with variability averaging less than 2 mm between 2 observers. The margin of error was at most 4 mm, representing the thickness of a single axial MRI slice, whether the ACL was intact or torn. Remnant tissue at attachments allows a reliable assessment even of torn ligaments. Identification of the ligament attachment areas was more user dependent than was identification of the attachment centers.
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Affiliation(s)
- Vimarsha Gopal Swami
- Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, Alberta, Canada
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