title: Evaluation of torso shape and asymmetry associated with scoliosis.
abstract: This paper presents a technique for evaluating torso shape and asymmetry in scoliosis using indices of point-set data obtained from torso surface scans. Point-set data are the maximum curvature points of a surface scan and contain key shape information. The centroids, distributions and densities of point-set data are indices of shape and asymmetry. The mean-squared deviations of the centroids per-cross-section from the medial plane are indicative of asymmetry. The distribution and density of point-set data are indicative of shape. Evaluations using point-set data indices were 100% in accord with those based on the cosmetic score. Indices of point-set data have more degrees of freedom and were able to distinguish between scans that have similar cosmetic scores.
authors.affiliation: Dept of Electrical & Computer Eng, University of Alberta, Edmonton, AB, Canada.
authors.forename: Peter
authors.initials: P
authors.lastname: Ajemba
authors.forename: Nelson
authors.initials: N
authors.lastname: Durdle
authors.forename: James
authors.initials: J
authors.lastname: Raso
mesh_terms: D000293:Adolescent; D000416:Alberta; D002648:Child; D005260:Female; D006801:Humans; D011187:Posture; D012600:Scoliosis / Q000503:physiopathology*; D012720:Severity of Illness Index; D013909:Thorax / Q000503:physiopathology*