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MRI assessment of Suprapinatus atrophy and fatty replacement

THOMAZEAU's OCCUPATION RATIO (SUPRASPINATUS)
 Muscle atrophy of the supraspintatus is assessed by method suggested by Thomazeau et al, by which the 'occupation ratio' is calculated. Occupation ratio has been defined as the ratio between the cross section of the muscle belly and that of its fossa on the Y-view. The Y-view is the oblique sagittal (T1 WI) plane that crosses the scapula through the medial border of the coracoid process.