Fig. 4.

(US images on the left): US oblique axial scans obtained at the femoral neck (top) and the femoral head (below). (MR images on the right): T1-weighted MR images corresponding to the US scans. The ileofemoral ligament appears as a hyperechoic band (curved arrow) in front of the femoral neck (CF). C, D: at the femoral head, the ligament appearing as a fibrillar structure (white arrow) is inserted on to the front edge of the cup near the anterior acetabular labrum (arrowheads). IP: iliopsoas muscle; Sa: sartorius muscle; RF: rectus femoris.