What is the role of MRI and CT scanning in the diagnosis of ankylosing spondylitis (AS) and undifferentiated spondyloarthropathy (USpA)?

Updated: Jul 17, 2018
  • Author: Lawrence H Brent, MD; Chief Editor: Herbert S Diamond, MD  more...
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Answer

Magnetic resonance imaging (MRI) or computed tomography (CT) scanning of the SI joints, spine, and peripheral joints may reveal evidence of early sacroiliitis, erosions, and enthesitis that are not apparent on standard radiographs. [9, 10]

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