MR arthrography (coronal T1-GRE fatsat) showing contrast medium within a small longitudinal tear of the acetabular labrum and slight irregularities of the chondral surface in the anterosuperior joint socket. Radial MPR of the 3D arthrographic sequence along the anterosuperior head-neck junction with an elevated alpha angle (angle of Nötzli was 63°) indicating femoroacetabular cam impingement.