Magnetic resonance imaging finding of the hip, axial plane. Calcification was noted in the right rectus femoris tendon showed thickening with small amount of fluid collection at the intermuscular fat plane. White arrow indicates calcification. AIIS: Anterior inferior iliac spine, Rf: Rectus femoris muscle and tendon, S: Sartorius muscle, I: Iliopsoas muscle, T: Tensor fasciae latae muscle, GMx: Gluteus maximus, GMe: Gluteus medius, GMi: Gluteus minimus.