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Published on: July 21, 2023
Focal liver lesions hyperintense on T1-weighted magnetic resonance images
Alessandro Furlan1, Daniele Marin, Kyongtae T Bae
1University of Pittsburgh Medical Center, Department of Radiology, 3362 Fifth Avenue, Pittsburgh, PA 15213, USA. furlana@upmc.edu
Abstract:
This article reviews focal liver lesions hyperintense on T1-weighted magnetic resonance (MR) images and describes the underlying etiologies associated with their T1 signal intensity. Although focal liver lesions are commonly detected because of their iso- or hypointensity on T1-weighted images, lesions (benign or malignant) may present with T1 hyperintensity when they contain T1 shortening elements--such as fat, hemorrhage, copper, melanin, and highly concentrated proteins. Our discussion includes the description of state-of-the-art T1-weighted MR sequences and the imaging features of lesions on pre- and postcontrast MR images that are characteristic for lesion composition and useful for making accurate diagnosis.
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