title: Automatic bone segmentation and bone-cartilage interface extraction for the shoulder joint from magnetic resonance images.
abstract: We present a statistical shape model approach for automated segmentation of the proximal humerus and scapula with subsequent bone-cartilage interface (BCI) extraction from 3D magnetic resonance (MR) images of the shoulder region. Manual and automated bone segmentations from shoulder MR examinations from 25 healthy subjects acquired using steady-state free precession sequences were compared with the Dice similarity coefficient (DSC). The mean DSC scores between the manual and automated segmentations of the humerus and scapula bone volumes surrounding the BCI region were 0.926  ±  0.050 and 0.837  ±  0.059, respectively. The mean DSC values obtained for BCI extraction were 0.806  ±  0.133 for the humerus and 0.795  ±  0.117 for the scapula. The current model-based approach successfully provided automated bone segmentation and BCI extraction from MR images of the shoulder. In future work, this framework appears to provide a promising avenue for automated segmentation and quantitative analysis of cartilage in the glenohumeral joint.
authors.affiliation: School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Australia.
authors.forename: Zhengyi
authors.initials: Z
authors.lastname: Yang
authors.forename: Jurgen
authors.initials: J
authors.lastname: Fripp
authors.forename: Shekhar S
authors.initials: SS
authors.lastname: Chandra
authors.forename: Aleš
authors.initials: A
authors.lastname: Neubert
authors.forename: Ying
authors.initials: Y
authors.lastname: Xia
authors.forename: Mark
authors.initials: M
authors.lastname: Strudwick
authors.forename: Anthony
authors.initials: A
authors.lastname: Paproki
authors.forename: Craig
authors.initials: C
authors.lastname: Engstrom
authors.forename: Stuart
authors.initials: S
authors.lastname: Crozier
mesh_terms: D000465:Algorithms; D002358:Cartilage, Articular / Q000473:pathology; D006801:Humans; D058430:Humeral Head / Q000473:pathology; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D015233:Models, Statistical; D012540:Scapula / Q000473:pathology; D012785:Shoulder Joint / Q000473:pathology*