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Transient Hepatic Intensity Differences: Part 1, Those Associated with Focal Lesions

¹ Department of Clinical Physiopathology, Section of Radiodiagnostics, University of Florence, Viale Morgagni 85, Florence 50134, Italy.
² Section of Radiodiagnostics, Ospedale SM Grazie Pozzuoli, Naples, Italy.

OBJECTIVE. The purpose of our study was to evaluate, on MRI, transient hepatic signal intensity differences (THID) that have already been seen on CT as transient hepatic attenuation differences (THAD) and to show the range of appearance of such arterial phenomena, when associated with focal lesions, in an effort to correlate morphology, cause, and pathogenesis.

CONCLUSION. Hepatic arterial phenomena visualized on MRI should be known and recognized to avoid incorrect diagnoses and to improve the characterization of focal liver lesions because their shape can lead to an understanding of pathogenetic mechanisms.

Keywords: arterial phenomena • dynamic MRI • hemodynamics • liver • liver disease • liver perfusion abnormalities • MRI • THID • transient hepatic intensity differences

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