Primary hyperaldosteronism MRI Findings
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1];Associate Editor(s)-in-Chief: Syed Hassan A. Kazmi BSc, MD [2]
Overview
MRI may be used for diagnosing adrenal adenomas when the attenuation on CT is <30 HU.
MRI
- Chemical shift imaging on MRI is the most reliable for diagnosis especially when CT findings are unrewarding.
- MRI is useful for adrenal masses with a signal intensity <30 HU.
- Signal dropout on out-of-phase imaging for:
- 10-30 HU on CT is 89% sensitive and 100% specific
- 10-20 HU on CT is 100% sensitive and 100% specific
[[Image:Adrenal_adenoma_MRI.jpg|200px|align right|Right adrenal adenoma,