Assessing the accuracy and precision of musculoskeletal motion tracking using cine-PC MRI on a 3.0T platform |
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Authors: | Abrahm J. Behnam Daniel A. Herzka Frances T. Sheehan |
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Affiliation: | 1. Department of Kinesiology and Sport Sciences, School of Education & Human Development, University of Miami, 1507 Levante Ave. Max Orovitz Building 114, Coral Gables, FL 33146, USA.;2. Department of Kinesiology, School of Education, Michigan State University, East Lansing, MI 48824, USA. |
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Abstract: | The rising cost of musculoskeletal pathology, disease, and injury creates a pressing need for accurate and reliable methods to quantify 3D musculoskeletal motion, fostering a renewed interest in this area over the past few years. To date, cine-phase contrast (PC) MRI remains the only technique capable of non-invasively tracking in vivo 3D musculoskeletal motion during volitional activity, but current scan times are long on the 1.5T MR platform (~2.5 min or 75 movement cycles). With the clinical availability of higher field strength magnets (3.0T) that have increased signal-to-noise ratios, it is likely that scan times can be reduced while improving accuracy. Therefore, the purpose of this study is to validate cine-PC MRI on a 3.0T platform, in terms of accuracy, precision, and subject-repeatability, and to determine if scan time could be minimized. On the 3.0T platform it is possible to limit scan time to 2 min, with sub-millimeter accuracy (<0.33 mm/0.97°), excellent technique precision (<0.18°), and strong subject-repeatability (<0.73 mm/1.10°). This represents reduction in imaging time by 25% (42 s), a 50% improvement in accuracy, and a 72% improvement in technique precision over the original 1.5T platform. Scan time can be reduced to 1 min (30 movement cycles), but the improvements in accuracy are not as large. |
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