Fig. 2.

Hip and thigh muscle image measurements. Example images from the proximal hip (A), distal hip (B) and mid thigh (C). Thirty-four to 39 images were acquired from the iliac crest to the inferior-most portion of the gluteus maximus for the hip musculature. A second sequence of 63–69 images were acquired overlapping the inferior-most portion of the gluteus maximus and extending to the knee joint line to capture the hamstring musculature. The cross-sectional area (when present) of the muscles: upper gluteus maximus (UGM), lower gluteus maximus (LGM), gluteus medius (GMED), gluteus minimus (GMIN), obturator internus (OBT_INT), obturator externus (OBT_EXT), quadratus femoris (QUAF_FEM), piriformis (PIRI), biceps femoris short head (BF_SH), biceps femoris long head (BF_LH), semi-membranosus (SEMI_M), and semi-tendinosus (SEMI_ T) were measured in each image. Note the bony landmarks: iliac crest (IC), femoral head (FH), and ischial tuberosity (IT).