What is the role of MRI in the diagnosis of giant cell arteritis (GCA) (temporal arteritis)?

Updated: Sep 03, 2020
  • Author: Mythili Seetharaman, MD; Chief Editor: Herbert S Diamond, MD  more...
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Answer

Rhéaume et al reported that high-resolution magnetic resonance imaging (MRI) of the scalp arteries had a sensitivity of 93.6% and a specificity of 77.9% for the diagnosis of GCA, with a corresponding negative predictive value of 98.2%. These authors suggested that MRI could be used as the initial investigation in GCA, with TAB being reserved for patients with an abnormal MRI.

Bley et al reported that high-resolution MRI and color duplex ultrasonography have comparable diagnostic power in detecting GCA. Decisions regarding which technique to use may depend on the clinical setting. [100]


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