In vivo validation of patellofemoral kinematics during overground gait and stair ascent.
In vivo validation of patellofemoral kinematics during overground gait and stair ascent.
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DOI：
10.1016/j.gaitpost.2018.06.028
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发表时间：
2018-07
期刊：
影响因子：
2.4
通讯作者：
Anderst W
中科院分区：
文献类型：
--
作者：
Pitcairn S;Lesniak B;Anderst W
髌股关节（PF）是非特异性膝前疼痛的常见部位。髌股关节疼痛的病理生理学可能与髌骨相对于股骨的异常运动有关，导致髌股关节应力增加。Patellofemoral运动不能准确地测量使用传统的motion capture.Research questionThe本研究的目的是要确定一个双平面放射摄影系统measureingin vivoPF运动在步行和stairascende.MethodsFour科目的准确性有三个1.0 mm直径的钽珠植入髌骨。参与者进行了三次试验，每一个在地面上行走和爬楼梯，而双平面X光片收集在100赫兹。髌骨运动进行跟踪使用放射立体摄影测量分析（RSA）作为“金标准”，并比较了体积CT模型为基础的跟踪算法，数字重建的射线照片匹配到原来的双平面radiographs.ResultsThe平均RMS之间的差异RSA和基于模型的跟踪为0.41毫米和1.97°时，没有从对侧腿的障碍。当髌骨至少部分被对侧腿阻塞时，这些差异分别增加了34%和40%。跟踪方法之间髌股关节间隙的平均RMS差异为0.9 mm或更小。SignificancePrevious确认双平面射线照相系统通过模拟运动移动尸体膝关节来估计跟踪精度。这些验证无法复制体内运动学，包括由于肌肉激活导致的髌骨运动，并且未能评估与对侧肢体阻塞相关的成像和跟踪挑战。通过复制对侧肢体的肌肉收缩、运动速度、关节活动范围和髌骨阻塞，本研究为将来的体内研究提供了髌股追踪准确性的现实估计。
BackgroundThe patellofemoral (PF) joint is a common site for non-specific anterior knee pain. The pathophysiology of patellofemoral pain may be related to abnormal motion of the patella relative to the femur, leading to increased stress at the patellofemoral joint. Patellofemoral motion cannot be accurately measured using conventional motion capture.Research questionThe aim of this study was to determine the accuracy of a biplane radiography system for measuringin vivoPF motion during walking and stair ascent.MethodsFour subjects had three 1.0 mm diameter tantalum beads implanted into the patella. Participants performed three trials each of over ground walking and stair ascent while biplane radiographs were collected at 100 Hz. Patella motion was tracked using radiostereophotogrammetric analysis (RSA) as a “gold standard”, and compared to a volumetric CT model-based tracking algorithm that matched digitally reconstructed radiographs to the original biplane radiographs.ResultsThe average RMS difference between the RSA and model-based tracking was 0.41 mm and 1.97° when there was no obstruction from the contralateral leg. These differences increased by 34% and 40%, respectively, when the patella was at least partially obstructed by the contralateral leg. The average RMS difference in patellofemoral joint space between tracking methods was 0.9 mm or less.SignificancePrevious validations of biplane radiographic systems have estimated tracking accuracy by moving cadaveric knees through simulated motions. These validations were unable to replicatein vivokinematics, including patella motion due to muscle activation, and failed to assess the imaging and tracking challenges related to contralateral limb obstruction. By replicating the muscle contraction, movement velocity, joint range of motion, and obstruction of the patella by the contralateral limb, the present study provides a realistic estimate of patellofemoral tracking accuracy for futurein vivostudies.
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影响因子：
4.8
作者：
Carlson, Victor R.;Boden, Barry P.;Sheehan, Frances T.
通讯作者：
Sheehan, Frances T.
影响因子：
2.4
作者：
Farrokhi S;Meholic B;Chuang WN;Gustafson JA;Fitzgerald GK;Tashman S
通讯作者：
Tashman S
影响因子：
3.8
作者：
Bull, AMJ;Katchburian, MV;Amis, AA
通讯作者：
Amis, AA
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：
2.2
作者：
Anderst, William;Zauel, Roger;Tashman, Scott
通讯作者：
Tashman, Scott