An easy method to demonstrate the cruciate ligaments by double contrast arthrography

A reproducible technique which does not require special equipment for demonstrating the cruciate ligaments by double contrast arthrography is described. The positive contrast medium coats the synovial surfaces of the ligaments, i.e., the anterior aspect of the anterior cruciate ligament and the posterior aspect of the posterior cruciate ligaments. The ligaments appear lucent by this technique because they are delineated by a sharp positive contrast medium/lucent interface. The study is performed prior to the meniscal exam before medium absorption occurs.