[Radiological assessment of ankylosing spondylitis].

This review presents the radiologic evaluation of AS as well as the radiologic appearances of the disease. The presentation is limited to radiologic changes of the sacroiliac joints and the lumbar spine. Conventional radiography and CT are used for the evaluation of the sacroiliac joints and in the lumbar spine conventional lateral tomography is used in addition to conventional radiography. Radioisotope scanning plays a limited role in the evaluation of AS. The diagnostic value and future potentials of MR imaging await further study.