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New dynamic three‐dimensional MRI technique for shoulder kinematic analysis
Author(s) -
Pierrart Jérôme,
LefèvreColau MarieMartine,
Skalli Wafa,
Vuillemin Valérie,
Masmejean Emmanuel H.,
Cuénod Charles A.,
Gregory Thomas M.
Publication year - 2014
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.24204
Subject(s) - kinematics , reproducibility , shoulders , medicine , nuclear medicine , orthodontics , mathematics , biomedical engineering , physics , surgery , statistics , classical mechanics
Purpose To establish a new imaging technique using dynamic MRI three‐dimensional (3D) volumetric acquisition in real‐time, on six normal shoulders for the analysis of the 3D shoulder kinematics during continuous motion. Materials and Methods At first, a standard static acquisition was performed. Then, fast images were obtained with a multi‐slice 3D balanced gradient echo sequence to get a real time series during the initial phase of shoulder abduction. Subsequently, the images were reconstructed; registered and the translational patterns of the humeral head relative to the glenoid and the size of the subacromial space were calculated. Additionally, the intraobserver reproducibility was tested. Results The maximal abduction was on average 43° (30° to 60°) and the mean width of the subacromial space was 7.7 mm (SD: ± 1.2 mm). Difference between extreme values and average values was low, respectively 2.5 mm on X‐axis, 2 mm on Y‐axis, 1.4 mm for the width of the subacromial space and 1.2° for the measure of the glenohumeral abduction. Conclusion This study reported a dynamic MRI protocol for the monitoring of shoulder 3D kinematics during continuous movement. The results suggest that there is no superior shift of the humeral head during the first phase of abduction. J. Magn. Reson. Imaging 2014;39:729–734 . © 2013 Wiley Periodicals, Inc .