Fig. 2

The 7 following points were digitized and named on each CT scan: a The Y point was digitized in the parasagittal view, at the intersection of the 3 bone branches (Y) on the aforementioned ‘Y-plane’; b The centre of the glenoid (G), the most medial point of the scapula (MS), and the cortical convergence (CC) of the anterior and posterior margins of the glenoid were all digitized in the same axial plane; c The base of the coracoid (BC) was digitized where the lateral cortex of the coracoid process merges with the cortex of the scapula in the axial view; d The anterior (HA) and posterior (HP) margins of the humeral head were digitized in the axial plane where the humeral head appeared to have the greatest size