Fig. 4.

Predicted muscle volumes vs. MRI-estimated muscle volumes. Each symbol represents the muscle volume for a specific muscle (sum of left and right side muscles) relative to the unity line (diagonal line). Data shown are for a male subject (with complete neck muscle data) that was not used to generate the regression equation or muscle volume distribution; coefficient of concordance=0.99. (A) Smaller muscles (same muscles as in Fig. 3A). (B) Larger muscles (same muscles as in Fig. 3B).