Glenoid version was measured as the angle between the line connecting the medial tip of the scapular spine and the center of the glenoid fossa and the line drawn tangential to the glenoid rim on the axial image. First, a line is formed by connecting the medial tip of the scapular spine and the center of the glenoid fossa. Second, a line is drawn perpendicular to the first line. Third, a line is the tangential line to the glenoid rim. Asterisk shows the glenoid version as the angle between the second and third lines.