Determination of personalized inertial parameters of lower limb by biplanar low-dose radiography

Abstract The inertial parameters of body segments are essential data in biomechanics. However, they are usually obtained from standard estimations in the literature. Medical imaging and video-based techniques were recently reported but present limitations. Some techniques provide only 2D measurements, while other techniques require a lot of tomographic images for a three-dimensional (3D) reconstruction. An original method is proposed to compute personalized inertial parameters from biplanar radiography. Simultaneous low-dose frontal and sagittal X-rays were obtained with EOS™ system. The thigh segments of six young males and six young females were studied and the personalized parameters were compared to the literature. The biplanar radiography method was coherent with estimations based on γ-ray scan, DEXA and MRI. Personalized inertial parameters from low-dose biplanar radiography should be further studied for other segments and other populations.

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