From: Threshold-based quantification of fatty degeneration in the supraspinatus muscle on MRI as an alternative method to Goutallier classification and single-voxel MR spectroscopy
Grade 0
(no fat)
Grade 1
(fatty streaks)
Grade 2
(fat < muscle)
Grade 3
(fat = muscle)
Grade 4
(fat > muscle)
Female
1
9
5
6
Male
2
8
0