Fig. 3.

Radiograph parameters. a, b Parameters used to define the bony geometry of the humeral head. c Parameters used to define the characteristics (centralisation) of the humeral head centre. AHD acromio-humeral distance, ARC articular surface arc, DCR distance coracoid/ rotational centre, DGR distance glenoid/ rotational centre, DHH diameter of humerus head, DTA distance greater tuberosity/acromion, DTC distance greater tuberosity/coracoid, DTH distance greater tuberosity/top of humerus head, EO effective offset, HD depth of humerus head, HH height of humerus head, HO humerus offset, Incl inclination angle, RC rotational centre, RHH radius of humerus head, SA shaft axis