What is the role of magnetic resonance angiography (MRA) in the diagnosis of Takayasu arteritis?

Updated: Nov 14, 2018
  • Author: Jefferson R Roberts, MD; Chief Editor: Herbert S Diamond, MD  more...
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The sensitivity of magnetic resonance angiography (MRA) is the same as or greater than that of angiography for revealing lesions in the aorta and its brachycephalic branches but is less sensitive for helping to detect smaller branch involvement. MRA that uses fast spin-echo sequences designed to enhance the detection of vessel wall edema shows promise in assessing disease activity before irreversible lesions develop.

Advances in technology have substantially improved the sensitivity and specificity of MRA, and the entire arterial vasculature can be displayed in less than 90 seconds. The risks are practically nonexistent. [41]

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