Laboratoire de Biomécanique, Arts et Métiers ParisTech, Paris, France; Laboratory of Biomechanics, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon; Gait and Motion Analysis Lab, SESOBEL, Beirut, Lebanon.
Eur J Radiol. 2013 Dec;82(12):2359-64. doi: 10.1016/j.ejrad.2013.07.006. Epub 2013 Aug 6.
The aim of this study is to explore the feasibility of 3D subject-specific skeletal reconstructions of lower limb in children using stereoradiography, and to assess uncertainty of clinical and anatomical parameters for children with cerebral palsy and for healthy children. The stereoradiography technique, using the EOS(®) system (Eos-imaging(®)), is based on the acquisition of two simultaneous digital anteroposterior and lateral X-rays, from head to feet in standing position and at low radiation dose. This technique allows subject-specific skeletal 3D reconstructions. Five children with cerebral palsy (CP) and 5 typically developing children (TD) were included in the study. Two operators performed the lower limb reconstructions twice. Tridimensional reconstructions were feasible for children over the age of 5 years. The study of reproducibility of anatomical parameters defining skeletal alignment showed uncertainties under 3° for the neck shaft angle, the femoral mechanical angle, and for the femoral and tibial torsions. The maximum degree of uncertainty was obtained for the femoral tibial rotation (4° for healthy children and 3.5° for children with CP).
本研究旨在探索使用立体放射摄影术对儿童下肢进行三维个体化骨骼重建的可行性，并评估脑瘫儿童和健康儿童的临床和解剖参数的不确定性。立体放射摄影技术使用 EOS（®）系统（Eos-imaging（®）），基于站立位头部到脚部的两个同时获取的数字前后位和侧位 X 射线，辐射剂量低。该技术允许进行个体化骨骼 3D 重建。本研究纳入了 5 名脑瘫儿童（CP）和 5 名典型发育儿童（TD）。两名操作人员对下肢进行了两次重建。三维重建对于 5 岁以上的儿童是可行的。对定义骨骼对线的解剖参数的重复性研究表明，颈干角、股骨机械角和股骨及胫骨扭转的不确定性在 3°以下。对于股骨胫骨旋转，最大的不确定性程度为 4°（健康儿童）和 3.5°（脑瘫儿童）。
