Accuracy and feasibility of high-speed dual fluoroscopy and model-based tracking to measure in vivo ankle arthrokinematics.
Accuracy and feasibility of high-speed dual fluoroscopy and model-based tracking to measure in vivo ankle arthrokinematics.
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DOI：
10.1016/j.gaitpost.2015.03.008
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发表时间：
2015-05
期刊：
影响因子：
2.4
通讯作者：
Anderson AE
中科院分区：
文献类型：
--
作者：
Wang B;Roach KE;Kapron AL;Fiorentino NM;Saltzman CL;Singer M;Anderson AE
胫距和距下运动学改变与踝关节骨关节炎的发展之间的关系尚不清楚，因为皮肤标记运动分析不能独立测量每个关节的关节。在这里，我们量化了准确性，并论证了高速双透视(DF)测量和可视化胫距和距下关节的三维关节(即关节运动学)的可行性。在两具身体的胫骨、距骨和跟骨内植入金属珠子。根据计算机断层扫描图像重建了身体和志愿者骨骼的三维表面模型。定制的DF系统被放置在仪表式跑步机旁边。在模拟步态(跑步机速度为0.5和1.0m/S)和模拟步态(跑步机速度分别为0.5和1.0m/S)下，采集身体绕三轴最大旋转(背-足屈、内-外翻、内-外旋转)的DF图像。用动态放射立体测量分析(DRSA)跟踪植入微珠的位置。还使用基于模型的无标记跟踪(MBT)计算了珠子位置，并将其与关节角度和平移与DRSA结果进行比较。所有帧的DRSA和MBT之间的平均位置差异定义了偏差；差异的标准偏差定义了精度。这位志愿者在跑步机上行走时被拍到了DF的图像。根据这些运动，计算关节运动学以及胫距和距下骨之间的距离。MBT的平均位置偏差(±标准差)为0.03±0.35 mm，旋转偏差为0.25±0.81°。平均平移和旋转精度分别为0.30±0.12 mm和0.63±0.28°。DF和MBT具有极好的测量精度，可以阐明活体受试者胫距和距下关节骨关节炎的运动学途径。
The relationship between altered tibiotalar and subtalar kinematics and development of ankle osteoarthritis is unknown, as skin marker motion analysis cannot measure articulations of each joint independently. Here, we quantified the accuracy and demonstrated the feasibility of high-speed dual fluoroscopy (DF) to measure and visualize the three-dimensional articulation (i.e. arthrokinematics) of the tibiotalar and subtalar joints. Metal beads were implanted in the tibia, talus and calcaneus of two cadavers. Three-dimensional surface models of the cadaver and volunteer bones were reconstructed from computed tomography images. A custom DF system was positioned adjacent to an instrumented treadmill. DF images of the cadavers were acquired during maximal rotation about three axes (dorsal–plantar flexion, inversion–eversion, internal–external rotation) and simulated gait (treadmill at 0.5 and 1.0 m/s). Positions of implanted beads were tracked using dynamic radiostereometric analysis (DRSA). Bead locations were also calculated using model-based markerless tracking (MBT) and compared, along with joint angles and translations, to DRSA results. The mean positional difference between DRSA and MBT for all frames defined bias; standard deviation of the difference defined precision. The volunteer was imaged with DF during treadmill gait. From these movements, joint kinematics and tibiotalar and subtalar bone-to-bone distance were calculated. The mean positional and rotational bias (±standard deviation) of MBT was 0.03 ± 0.35 mm and 0.25 ± 0.81°, respectively. Mean translational and rotational precision was 0.30 ± 0.12 mm and 0.63 ± 0.28°, respectively. With excellent measurement accuracy, DF and MBT may elucidate the kinematic pathways responsible for osteoarthritis of the tibiotalar and subtalar joints in living subjects.
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影响因子：
4.2
作者：
Valderrabano, Victor;Horisberger, Monika;Hintermann, Beat
通讯作者：
Hintermann, Beat
DOI：
10.1115/1.1933949
发表时间：
2005-08-01
影响因子：
1.7
作者：
Fregly, BJ;Rahman, HA;Banks, SA
通讯作者：
Banks, SA
DOI：
10.1115/1.2206199
发表时间：
2006-08-01
影响因子：
1.7
作者：
Bey, Michael J.;Zauel, Roger;Tashman, Scott
通讯作者：
Tashman, Scott
影响因子：
2.4
作者：
Peltz, Cathryn D.;Haladik, Jeffrey A.;Bey, Michael J.
通讯作者：
Bey, Michael J.
影响因子：
--
作者：
Kobayashi, Takumi;Saka, Masayuki;Gamada, Kazuyoshi
通讯作者：
Gamada, Kazuyoshi