Fig. 3.

(US images on the left): Axial US scan obtained at the anterior surface of the coxofemoral joint (above). Sagittal US scan obtained at the tendon of the iliopsoas muscle (bottom). (MR image on the right): T1-weighted MR images corresponding to the US scans. US provides visualization of the acetabular labrum. The labrum appears as a hyperechoic homogeneous structure (black arrowheads). The tendon of the iliopsoas muscle runs in front of the labrum (white arrowheads); note the hyperechoic and fibrillar internal structure. IP: iliopsoas muscle; TF: femoral head; black arrow: femoral nerve; white arrow: common femoral artery.