Three-dimensional reconstructions for asymptomatic and cerebral palsy children's lower limbs using a biplanar X-ray system: a feasibility study.
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).
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. Electronic address: ayman.assi@gmail.com.
Ayman
A
Assi
Yasmina
Y
Chaibi
Ana
A
Presedo
Jean
J
Dubousset
Ismat
I
Ghanem
Wafa
W
Skalli
D000293:Adolescent; D000465:Algorithms; D002547:Cerebral Palsy / Q000000981:diagnostic imaging*; D002648:Child; D002675:Child, Preschool; D005240:Feasibility Studies; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D035002:Lower Extremity / Q000000981:diagnostic imaging*; D008297:Male; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
Biomechanics; Biplanar X-rays; Cerebral palsy; Children; Clinical 3D measurements; EOS; Lower limbs