In common with other subdisciplines in radiology, musculoskeletal imaging has been affected dramatically by the profound techno-logic developments that have taken place during the past 2 decades. As examples, although computed tomography(CT) and magnetic resonance(MR) imaging were initially applied to clinical problems other than those that affect the musculoskeletal system, both methods now are used by many on a daily basis to investigate disorders of bones, joints, and soft tissues. They provide information that, until now, was considered impossible to gather in a noninvasive fashion, and, further, they hold great promise for future endeavors related to clinical practice, as well as to research. The opportunities are endless and truly exciting, but with these opportunities has come a challenge. Compared with routine radiogra-phy, the images generated with MR imaging and to some extent CT scanning are far more numerous, the planes of section are highly variable, the displays are affected dramatically by the precise imaging parameters that are chosen, and the need to know regional anatomy has never been greater.