Magnetic resonance imaging of the knee: an overview.

Magnetic resonance imaging (MRI) provides a new and important tool for investigating knee disorders. This article reviews the basic techniques available for investigation of the knee using MRI and describes the anatomy as delineated by this method. A large number of disorders are best evaluated by MRI, including internal abnormalities such as those of the cruciate ligaments and the menisci. Other disorders include abnormalities of the patella and quadriceps mechanism, cartilage, and synovium. Bony abnormalities such as osteonecrosis and tumors, as well as bone contusions and fractures, also may be detected. MRI is rapid and safe. Where available it is probably the best method by which to examine diseases of the knee.