Fig. 1

Images in a 6-year-old DMD boy. The axial T1-maps with colors corresponding to a T1-value range were on the left column. Four cross-section levels [(1) level near the sciatic foramen (a); (2) level near the greater trochanter-ischial tuberosity (b); (3) level near the closer proximal part of the femoral diaphysis (c); (4) approximately 5 cm below level (3) (d)] were chosen. Evaluation of individual muscle at each level as follows: Level (1) (a), Gluteus maximus (GMa), Gluteus medius (GMe), Gluteus minimus (GMi), Iliopsoas (IP); Level (2) (b), Tensor fascia (TF), Obturator internus (OI), Pectineus (Pe); Level (3) (c), Adductor longus (AL), Adductor brevis (AB); Level (4) (d), Rectus femoris (RF), Vastus lateralis (VL), Vastus intermedius (VI), Vastus medialis (VM), Gracilis (Gr), Sartorius (Sa), Adductor magnus (AM), Semitendinosus (St), Semimembranosus (Sm), Biceps femoris long head (BFLH). A total of 19 muscles on the right side were included for assessment