A Comparison of Inertial Measurement Unit and Motion Capture Measurements of Tibiofemoral Kinematics during Simulated Pivot Landings.
A Comparison of Inertial Measurement Unit and Motion Capture Measurements of Tibiofemoral Kinematics during Simulated Pivot Landings.
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DOI：
10.3390/s22124433
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发表时间：
2022-06-11
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影响因子：
--
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受伤通常与身体部位的快速运动有关。我们比较了 Certus 运动捕捉和 APDM 惯性测量单元 (IMU) 在模拟枢轴着陆（即约 70 毫秒峰值）期间对九个解剖无皮肤、皮下脂肪和肌肉的尸体膝盖的胫股角和角速度变化的测量结果。使用 Bland-Altman 协议限 (LoAs) 比较了总共 852 项试验的数据：Certus 系统被认为是角度变化测量的黄金标准，而 IMU 被认为是角速度变化的黄金标准。结果显示，虽然平均峰值 IMU 膝关节角度变化略有低估（屈曲 2.1°、内旋 0.2°、外翻 3.0°），但 LoA 较大，范围为 35.9% 至 49.8%。在角速度变化的情况下，Certus 在矢状面具有可接受的精度，胫骨和股骨的 LoA 为 ±54.9°/s，LoAs 为 ±32.5°/s。对于这些快速运动，我们得出的结论是，即使没有软组织，IMU 也无法可靠地测量这些峰值 3D 膝关节角度变化； Certus 峰值胫股角速度变化的测量取决于速度大小和测量平面。
Injuries are often associated with rapid body segment movements. We compared Certus motion capture and APDM inertial measurement unit (IMU) measurements of tibiofemoral angle and angular velocity changes during simulated pivot landings (i.e., ~70 ms peak) of nine cadaver knees dissected free of skin, subcutaneous fat, and muscle. Data from a total of 852 trials were compared using the Bland–Altman limits of agreement (LoAs): the Certus system was considered the gold standard measure for the angle change measurements, whereas the IMU was considered the gold standard for angular velocity changes. The results show that, although the mean peak IMU knee joint angle changes were slightly underestimated (2.1° for flexion, 0.2° for internal rotation, and 3.0° for valgus), the LoAs were large, ranging from 35.9% to 49.8%. In the case of the angular velocity changes, Certus had acceptable accuracy in the sagittal plane, with LoAs of ±54.9°/s and ±32.5°/s for the tibia and femur. For these rapid motions, we conclude that, even in the absence of soft tissues, the IMUs could not reliably measure these peak 3D knee angle changes; Certus measurements of peak tibiofemoral angular velocity changes depended on both the magnitude of the velocity and the plane of measurement.
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影响因子：
2.2
作者：
Dahl, Kimi D.;Dunford, Kristin M.;Tashman, Scott
通讯作者：
Tashman, Scott
影响因子：
3.9
作者：
Ajdaroski, Mirel;Tadakala, Ruchika;Esquivel, Amanda
通讯作者：
Esquivel, Amanda
影响因子：
3.3
作者：
Giavarina D
通讯作者：
Giavarina D
影响因子：
2
作者：
Kaeding, Christopher C.;Leger-St-Jean, Benjamin;Magnussen, Robert A.
通讯作者：
Magnussen, Robert A.
DOI：
10.2307/2987937
发表时间：
1983-01-01
期刊：
JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES D-THE STATISTICIAN
影响因子：
--
作者：
ALTMAN, DG;BLAND, JM
通讯作者：
BLAND, JM