Fig. 4

From the sagittal oblique view of T1-weighted magnetic resonance imaging, the muscle atrophy were evaluated in the most lateral image on which the scapular spine was in contact with scapular body (Y - shaped view). The Zanetti’s tangent line extended from superior aspect of the coracoid to the superior border of the scapular spine, then the other two lines were extended from each scapular process to tip of scapular body