Wesseling Mariska, De Groote Friedl, Bosmans Lode, Bartels Ward, Meyer Christophe, Desloovere Kaat, Jonkers Ilse
a Department of Kinesiology, Human Movement Biomechanics , KU Leuven , Heverlee , Belgium.
b Department of Mechanical Engineering, Biomechanics , KU Leuven , Heverlee , Belgium.
Comput Methods Biomech Biomed Engin. 2016 Nov;19(14):1475-88. doi: 10.1080/10255842.2016.1154547. Epub 2016 Mar 1.
This study assessed the relative importance of introducing an increasing level of medical image-based subject-specific detail in bone and muscle geometry in the musculoskeletal model, on calculated hip contact forces during gait. These forces were compared to introducing minimization of hip contact forces in the optimization criterion. With an increasing level of subject-specific detail, specifically MRI-based geometry and wrapping surfaces representing the hip capsule, hip contact forces decreased and were more comparable to contact forces measured using instrumented prostheses (average difference of 0.69 BW at the first peak compared to 1.04 BW for the generic model). Inclusion of subject-specific wrapping surfaces in the model had a greater effect than altering the cost function definition.
本研究评估了在肌肉骨骼模型中，增加骨骼和肌肉几何结构中基于医学图像的个体特异性细节水平，对步态期间计算的髋关节接触力的相对重要性。将这些力与在优化标准中引入髋关节接触力最小化的情况进行了比较。随着个体特异性细节水平的提高，特别是基于MRI的几何结构和代表髋关节囊的包裹表面，髋关节接触力降低，并且与使用仪器化假体测量的接触力更具可比性（第一个峰值时平均差异为0.69倍体重，而通用模型为1.04倍体重）。在模型中纳入个体特异性包裹表面比改变成本函数定义的影响更大。
