title: Assessment of the 3-d reconstruction and high-resolution geometrical modeling of the human skeletal trunk from 2-D radiographic images.
abstract: This paper presents an in vivo validation of a method for the three-dimensional (3-D) high-resolution modeling of the human spine, rib cage, and pelvis for the study of spinal deformities. The method uses an adaptation of a standard close-range photogrammetry method called direct linear transformation to reconstruct the 3-D coordinates of anatomical landmarks from three radiographic images of the subject's trunk. It then deforms in 3-D 1-mm-resolution anatomical primitives (reference bones) obtained by serial computed tomography-scan reconstruction of a dry specimen. The free-form deformation is calculated using dual kriging equations. In vivo validation of this method on 40 scoliotic vertebrae gives an overall accuracy of 3.3 +/- 3.8 mm, making it an adequate tool for clinical studies and mechanical analysis purposes.
authors.affiliation: Research Center, Sainte-Justine Hospital, Research Center, 3175 Côte-Sainte-Catherine, Montreal, QC H3T 1C5, Canada. sebastien.delorme@nrc.ca
authors.forename: S
authors.initials: S
authors.lastname: Delorme
authors.forename: Y
authors.initials: Y
authors.lastname: Petit
authors.forename: J A
authors.initials: JA
authors.lastname: de Guise
authors.forename: H
authors.initials: H
authors.lastname: Labelle
authors.forename: C E
authors.initials: CE
authors.lastname: Aubin
authors.forename: J
authors.initials: J
authors.lastname: Dansereau
mesh_terms: D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D015588:Observer Variation; D010384:Pelvic Bones / Q000000981:diagnostic imaging; D010780:Photogrammetry / Q000379:methods; D011786:Quality Control; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D011859:Radiography / Q000379:methods; D015203:Reproducibility of Results; D012272:Ribs / Q000000981:diagnostic imaging; D012600:Scoliosis / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D013131:Spine / Q000002:abnormalities / Q000000981:diagnostic imaging*; D013382:Subtraction Technique; D014057:Tomography, X-Ray Computed / Q000379:methods