title: Accuracy assessment of human trunk surface 3D reconstructions from an optical digitising system.
abstract: The lack of reliable techniques to follow up scoliotic deformity from the external asymmetry of the trunk leads to a general use of X-rays and indices of spinal deformity. Young adolescents with idiopathic scoliosis need intensive follow-ups for many years and, consequently, they are repeatedly exposed to ionising radiation, which is hazardous to their long-term health. Furthermore, treatments attempt to improve both spinal and surface deformities, but internal indices do not describe the external asymmetry. The purpose of this study was to assess a commercial, optical 3D digitising system for the 3D reconstruction of the entire trunk for clinical assessment of external asymmetry. The resulting surface is a textured, high-density polygonal mesh. The accuracy assessment was based on repeated reconstructions of a manikin with markers fixed on it. The average normal distance between the reconstructed surfaces and the reference data (markers measured with CMM) was 1.1 +/- 0.9 mm.
authors.affiliation: Biomedical Engineering Institute, Ecole Polytechnique de Montréal, Montréal, Canada. valerie.pazos@polymtl.ca
authors.forename: V
authors.initials: V
authors.lastname: Pazos
authors.forename: F
authors.initials: F
authors.lastname: Cheriet
authors.forename: L
authors.initials: L
authors.lastname: Song
authors.forename: H
authors.initials: H
authors.lastname: Labelle
authors.forename: J
authors.initials: J
authors.lastname: Dansereau
mesh_terms: D000293:Adolescent; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008953:Models, Anatomic; D015903:Moire Topography / Q000379:methods; D012600:Scoliosis / Q000473:pathology*
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