University of Pittsburgh Medical Center Department of Orthopedic Surgery, Pittsburgh, Pennsylvania, USA.
J Arthroplasty. 2011 Jan;26(1):88-97. doi: 10.1016/j.arth.2009.12.004. Epub 2010 Mar 26.
This study investigated the efficacy of a combined high-speed, biplane radiography and model-based tracking technique to study hip joint kinematics and arthrokinematics. Comparing model-based tracking to the gold standard of radiostereometric analysis using implanted metal beads, joint translation was measured with a bias of 0.2 mm and a precision of 0.3 mm, whereas joint rotation was measured with a bias of 0.2° and a precision of 0.8°. A novel measure of hip arthrokinematics characterizing the region of closest contact in the anterosuperior acetabulum was measured with a bias of 0.9% and a precision of 2.5%. Model-based tracking of the hip thus provides the opportunity to noninvasively study hip pathologic conditions such as osteoarthritis and femoroacetabular impingement with great accuracy.
本研究旨在探究一种结合高速双平面 X 射线摄影和基于模型的跟踪技术，以研究髋关节运动学和关节运动学的疗效。通过将基于模型的跟踪与植入金属珠的放射立体分析的金标准进行比较，关节平移的测量偏差为 0.2 毫米，精度为 0.3 毫米，而关节旋转的测量偏差为 0.2°，精度为 0.8°。一种新的髋关节关节运动学测量方法，用于描述前上髋臼的最接近接触区域，其偏差为 0.9%，精度为 2.5%。因此，基于模型的髋关节跟踪技术为非侵入性地研究髋关节病变，如骨关节炎和股骨髋臼撞击症，提供了具有高精度的可能性。
