Fig. 2A–B.
On the CT scan sagittal oblique view (“Y-view”), five cross-sectional area measurements are made: supraspinatus (SSP) extramuscular fat (A), supraspinatus muscle area (B), supraspinatus intramuscular fat (not shown in figure), infraspinatus (ISP) muscle area (A), and infraspinatus intramuscular fat (B).