Objective To discuss the value of CR and CT to diagnose early ankylosing spondylitis. Methods Clinical data and the signs of CR and CT of eighteen cases which were diagnosed as early ankylosing spondylitis were analyzed. Results Both CR and CT imaging could show the diseased region, morphous change, and the extent of diseased joint. CT imaging could show the tiny change of diseased articular facet. Conclusion CR plain is the first choice to diagnose early ankylosing spondylitis. As doubtful case, CR combination with CT scan can raise the accuracy rate of diagnosis to early ankylosing spondylitis.
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