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Dynamic MR imaging of the hip in Legg-Calvé-Perthes disease: comparison with arthrography.

Introduction Hip arthrography is considered of importance in tailoring treatment in children with LCPD [l-3]. Hip arthrography in children with LCPD is employed for dynamic imaging to determine congruency and containment of the femoral head by the acetabulum as well as to rule out “hinge abduction” [3]. Information obtained by hip arthrography may help in selecting candidates for operative treatment [3]. Dynamic evaluation of the hip with MR imaging is hampered by the closed architecture of conventional MR systems. With the increasing availability of openconfiguration MR systems dynamic imaging in various positions has become feasible.