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Keelson B, Buzzatti L, Van Gompel G, Scheerlinck T, Hereus S, de Mey J, Cattrysse E, Vandemeulebroucke J, Buls N. The use of cardiac CT acquisition mode for dynamic musculoskeletal imaging. Phys Med 2022; 104:75-84. [PMID: 36370606 DOI: 10.1016/j.ejmp.2022.10.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/30/2022] [Accepted: 10/31/2022] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES To quantitatively evaluate the impact of a cardiac acquisition CT mode on motion artifacts in comparison to a conventional cine mode for dynamic musculoskeletal (MSK) imaging. METHODS A rotating PMMA phantom with air-filled holes drilled at varying distances from the disk center corresponding to linear hole speeds of 0.75 cm/s, 2.0 cm/s, and 3.6 cm/s was designed. Dynamic scans were obtained in cardiac and cine modes while the phantom was rotating at 48°/s in the CT scanner. An automated workflow to compute the Jaccard distance (JD) was established to quantify degree of motion artifacts in the reconstructed phantom images. JD values between the cardiac and cine scan modes were compared using a paired sample t-test. In addition, three healthy volunteers were scanned with both modes during a cyclic flexion-extension motion of the knee and analysed using the proposed metric. RESULTS For all hole sizes and speeds, the cardiac scan mode had significantly lower (p-value <0.001) JD values. (0.39 [0.32-0.46]) i.e less motion artifacts in comparison to the cine mode (0.72 [0.68-0.76]). For both modes, a progressive increase in JD was also observed as the linear speed of the holes increased from 0.75 cm/s to 3.6 cm/s. The dynamic images of the three healthy volunteers showed less artifacts when scanned in cardiac mode compared to cine mode, and this was quantitatively confirmed by the JD values. CONCLUSIONS A cardiac scan mode could be used to study dynamic musculoskeletal phenomena especially of fast-moving joints since it significantly minimized motion artifacts.
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Affiliation(s)
- Benyameen Keelson
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussels (UZB), Department of radiology, Laarbeeklaan 101, 1090 Brussels, Belgium; Vrije Universiteit Brussel (VUB), Department of Electronics and Informatics (ETRO), Pleinlaan 9, 1050 Brussels, Belgium; IMEC, Kapeldreef 75, B-3002 Leuven, Belgium.
| | - Luca Buzzatti
- Vrije Universiteit Brussel (VUB) Department of Physiotherapy, Human Physiology and Anatomy, Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Gert Van Gompel
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussels (UZB), Department of radiology, Laarbeeklaan 101, 1090 Brussels, Belgium
| | - Thierry Scheerlinck
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Department of Orthopaedic Surgery and Traumatology, Laarbeeklaan 101, 1090 Brussels, Belgium
| | - Savanah Hereus
- Vrije Universiteit Brussel (VUB) Department of Physiotherapy, Human Physiology and Anatomy, Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Johan de Mey
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussels (UZB), Department of radiology, Laarbeeklaan 101, 1090 Brussels, Belgium
| | - Erik Cattrysse
- Vrije Universiteit Brussel (VUB) Department of Physiotherapy, Human Physiology and Anatomy, Laarbeeklaan 103, 1090 Brussels, Belgium
| | - Jef Vandemeulebroucke
- Vrije Universiteit Brussel (VUB), Department of Electronics and Informatics (ETRO), Pleinlaan 9, 1050 Brussels, Belgium; IMEC, Kapeldreef 75, B-3002 Leuven, Belgium
| | - Nico Buls
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussels (UZB), Department of radiology, Laarbeeklaan 101, 1090 Brussels, Belgium
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Wong YR, Huei Tay SS, Mat Jais IS, Leo HL, Lieu CF, Tay SC. Computational Simulation of Synovial Fluid Kinematics of the Scapholunate Joint. J Hand Surg Asian Pac Vol 2019; 24:169-174. [PMID: 31035888 DOI: 10.1142/s242483551950022x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background: The interaction between wrist kinematics and synovial fluid pressure has yet to be studied. To our knowledge, this is the first study to determine the effect of scapholunate joint kinematics on synovial fluid pressure change using finite volume method. Methods: The carpal bones of a cadaveric hand were obtained from Computed Tomography (CT) scans. CT images of the carpal bones were segmented and reconstructed into 3D model. The 3D synovial fluid model between the scaphoid and lunate was constructed and then used for computational simulations. The kinematics data of scapholunate joint obtained from radioulnar deviation of the wrist was investigated. Results: It was found that the pressure in synovial fluid varied from -1.68 to 2.64 Pa with maximum pressure located at the scaphoid-fluid interface during the radial deviation. For ulnar deviation, the pressure increased gradually from the scaphoid-fluid interface towards the lunate-fluid interface (-1.37 to 0.37 Pa). Conclusions: This new computational model provides a basis for the study of pathomechanics of ligament injury with the inclusion of synovial fluid.
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Affiliation(s)
- Yoke-Rung Wong
- * Biomechanics Laboratory, Singapore General Hospital, Singapore
| | - Sophie Sok Huei Tay
- † Department of Biomedical Engineering, National University of Singapore, Singapore
| | | | - Hwa-Liang Leo
- † Department of Biomedical Engineering, National University of Singapore, Singapore
| | - Chee-Fui Lieu
- ‡ School of Engineering, Republic Polytechnic, Singapore
| | - Shian-Chao Tay
- * Biomechanics Laboratory, Singapore General Hospital, Singapore.,§ Department of Hand Surgery, Singapore General Hospital, Singapore
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Dobbe JGG, de Roo MGA, Visschers JC, Strackee SD, Streekstra GJ. Evaluation of a Quantitative Method for Carpal Motion Analysis Using Clinical 3-D and 4-D CT Protocols. IEEE TRANSACTIONS ON MEDICAL IMAGING 2019; 38:1048-1057. [PMID: 30369440 DOI: 10.1109/tmi.2018.2877503] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
For wrist complaints related to motion, a 2-D radiograph or CT scan of the static wrist may not always be considered diagnostic. 3-D motion imaging, i.e., multiple 3DCT scans in time (4DCT), enables quantifying carpal motion and comparing motion patterns of the affected wrist with those of the healthy contralateral side. The accuracy and precision of the method, however, is limited by noise and motion artifacts. Although, the technique is considered promising in existing literature, the accuracy and precision of carpal motion analysis has never been investigated systematically. In this paper, we introduce and evaluate a semi-automatic segmentation- and registration-based method for 3-D carpal motion analysis. We investigate the accuracy and precision of the method, and its dependency on motion and scan parameters (angular velocity, dose, gantry revolution angle for image reconstruction, and scanner type) using a wrist phantom. During standstill the positioning error was ≤ 0.23 mm and ≤ 0.78°. A partial gantry revolution for 3-D reconstruction introduced image deformation, contributing to a positioning error of approx. 0.8 mm. This error increased with reduced dose, and with increasing angular velocity of the wrist phantom. In cases where the phantom was rotating about an axis parallel to the rotation axis of the gantry, and in a direction opposite to the gantry, the positioning error increased, probably because of the apparent increase in angular velocity with respect to the gantry. Slow carpal motion 4DCT analysis is feasible using a regular CT scanner. A partial gantry revolution angle for 3-D reconstruction may introduce image deformation, which decreases the accuracy of carpal motion analysis. Knowing the positioning error in 4DCT imaging with the proposed method is considered valuable when investigating wrist injury since it enables discrimination of actual motion from apparent motion caused by methodological error.
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Cai K, Yang R, Yue H, Li L, Ou S, Liu F. Dynamic updating atlas for heart segmentation with a nonlinear field-based model. Int J Med Robot 2017; 13. [PMID: 27862910 DOI: 10.1002/rcs.1785] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 08/23/2016] [Indexed: 11/09/2022]
Abstract
BACKGROUND Segmentation of cardiac computed tomography (CT) images is an effective method for assessing the dynamic function of the heart and lungs. In the atlas-based heart segmentation approach, the quality of segmentation usually relies upon atlas images, and the selection of those reference images is a key step. The optimal goal in this selection process is to have the reference images as close to the target image as possible. METHODS This study proposes an atlas dynamic update algorithm using a scheme of nonlinear deformation field. The proposed method is based on the features among double-source CT (DSCT) slices. The extraction of these features will form a base to construct an average model and the created reference atlas image is updated during the registration process. A nonlinear field-based model was used to effectively implement a 4D cardiac segmentation. RESULTS The proposed segmentation framework was validated with 14 4D cardiac CT sequences. The algorithm achieved an acceptable accuracy (1.0-2.8 mm). CONCLUSION Our proposed method that combines a nonlinear field-based model and dynamic updating atlas strategies can provide an effective and accurate way for whole heart segmentation. The success of the proposed method largely relies on the effective use of the prior knowledge of the atlas and the similarity explored among the to-be-segmented DSCT sequences.
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Affiliation(s)
- Ken Cai
- School of Information Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Rongqian Yang
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Hongwei Yue
- School of Information Engineering, Wuyi University, Jiangmen, 529020, China
| | - Lihua Li
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Shanxing Ou
- Department of Radiology, General Hospital of Guangzhou Military Command of PLA, Guangzhou, 510010, China
| | - Feng Liu
- School of Information Technology and Electrical Engineering, the University of Queensland, Brisbane, QLD 4072, Australia
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Mat Jais I, Tay S. Kinematic analysis of the scaphoid using gated four-dimensional CT. Clin Radiol 2017; 72:794.e1-794.e9. [DOI: 10.1016/j.crad.2017.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 03/24/2017] [Accepted: 04/03/2017] [Indexed: 11/27/2022]
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Ramamurthy NK, Chojnowski AJ, Toms AP. Imaging in carpal instability. J Hand Surg Eur Vol 2016; 41:22-34. [PMID: 26586689 DOI: 10.1177/1753193415610515] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 09/01/2015] [Indexed: 02/03/2023]
Abstract
Carpal instability is a complex and heterogeneous clinical condition. Management requires accurate identification of structural injury with an understanding of the resultant movement (kinematic) and load transfer (kinetic) failure. Static imaging techniques, such as plain film radiography, stress views, ultrasound, magnetic resonance, MR arthrography and computerized tomography arthrography, may accurately depict major wrist ligamentous injury. Dynamic ultrasound and videofluoroscopy may demonstrate dynamic instability and kinematic dysfunction. There is a growing evidence base for the diagnostic accuracy of these techniques in detecting intrinsic ligament tears, but there are limitations. Evidence of their efficacy and relevance in detection of non-dissociative carpal instability and extrinsic ligament tears is weak. Further research into the accuracy of existing imaging modalities is still required. Novel techniques, including four-dimensional computerized tomography and magnetic resonance, can evaluate both cross-sectional and functional carpal anatomy. This is a narrative review of level-III studies evaluating the role of imaging in carpal instability.
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Affiliation(s)
- N K Ramamurthy
- Department of Radiology, Norfolk & Norwich University Hospital NHS Foundation Trust, Norwich, UK
| | - A J Chojnowski
- Department of Orthopaedic Surgery, Norfolk & Norwich University Hospital NHS Foundation Trust, Norwich, UK
| | - A P Toms
- Department of Radiology, Norfolk & Norwich University Hospital NHS Foundation Trust, Norwich, UK
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Mat Jais IS, Liu X, An KN, Tay SC. A method for carpal motion hysteresis quantification in 4-dimensional imaging of the wrist. Med Eng Phys 2014; 36:1699-703. [DOI: 10.1016/j.medengphy.2014.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 08/01/2014] [Accepted: 08/25/2014] [Indexed: 10/24/2022]
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