Optical motion capture accuracy is task-dependent in assessing wrist motion

JOURNAL OF BIOMECHANICS

卷:120

Article

McHugh, Brian^1,2  Akhbari, Bardiya^1,2  Morton, Amy M.^3,4  Moore, Douglas C.^3,4  Crisco, Joseph J.^1,2,3,4 

[1] Brown Univ, Ctr Biomed Engn, Providence, RI 02912 USA

[2] Brown Univ, Sch Engn, Providence, RI 02912 USA

[3] Brown Univ, Dept Orthoped, Warren Alpert Med Sch, Providence, RI 02903 USA

[4] Rhode Isl Hosp, 1 Hoppin St,CORO West,Suite 404, Providence, RI 02903 USA

关键词: Optical motion capture;    Wrist;    Kinematics;    Soft tissue artifact;    Accuracy;   

DOI  :  10.1016/j.jbiomech.2021.110362

来源: Elsevier

【 摘 要 】

Optical motion capture (OMC) systems are commonly used to capture in-vivo three-dimensional joint kinematics. However, the skin-based markers may not reflect the underlying bone movement, a source of error known as soft tissue artifact (STA). This study examined STA during wrist motion by evaluating the agreement between OMC and biplanar videoradiography (BVR). Nine subjects completed 7 different wrist motion tasks: doorknob rotation to capture supination and pronation, radial-ulnar deviation, flex-ion-extension, circumduction, hammering, and pitcher pouring. BVR and OMC captured the motion simultaneously. Wrist kinematics were quantified using helical motion parameters of rotation and trans-lation, and Bland-Altman analysis quantified the mean difference (bias) and 95% limit of agreement (LOA). The rotational bias of doorknob pronation, a median bias of-4.9 degrees, was significantly larger than the flexion-extension (0.7 degrees, p < 0.05) and radial-ulnar deviation (1.8 degrees, p < 0.01) tasks. The rotational LOA range was significantly smaller in the flexion-extension task (5.9 degrees) compared to pitcher (11.6 degrees, p < 0.05) and doorknob pronation (17.9 degrees, p < 0.05) tasks. The translation bias did not differ between tasks. The translation LOA range was significantly larger in circumduction (9.8 degrees) compared to the radial-ulnar deviation (6.3 degrees, p < 0.05) and pitcher (3.4 degrees, p < 0.05) tasks. While OMC technology has a wide-range of successful applications, we demonstrated it has relatively poor agreement with BVR in tracking wrist motion, and that the agreement depends on the nature and direction of wrist motion. (c) 2021 Elsevier Ltd. All rights reserved.

【 授权许可】

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