[Diagnostic potentials of quantitative bone scintigraphy in spondylitis ankylopoietica: a comparison with x-ray findings].

In 576 patients quantitative scintigraphy of the sacroiliac joints and the spinal cord with 99mTc-Pyrophosphate was performed. 328 were patients with proven ankylosing spondylitis according to the New-York criteria. 120 were patients with a clinically and roentgenologically suspected ankylosing spondylitis and 128 persons formed a healthy control group.