Which imaging modality is most helpful for characterizing hepatic hemangiomas due to high T2 signal?

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Multiple Choice

Which imaging modality is most helpful for characterizing hepatic hemangiomas due to high T2 signal?

High T2 signal is a key feature of cavernous hepatic hemangiomas, because their vascular spaces are filled with slow-flowing blood, which appears very bright on T2-weighted MRI. MRI is the most helpful imaging modality for characterizing these lesions precisely because it directly highlights this bright signal and can confirm by showing the typical contrast enhancement pattern: peripheral nodular enhancement with centripetal fill-in on dynamic gadolinium sequences. This combination—very bright T2 signal plus the characteristic enhancement behavior on MRI—distinguishes hemangiomas from other liver lesions. Ultrasound can raise suspicion but is less specific, CT relies on enhancement patterns and lacks the T2 characterization, and PET-CT is not useful for benign vascular lesions.

High T2 signal is a key feature of cavernous hepatic hemangiomas, because their vascular spaces are filled with slow-flowing blood, which appears very bright on T2-weighted MRI. MRI is the most helpful imaging modality for characterizing these lesions precisely because it directly highlights this bright signal and can confirm by showing the typical contrast enhancement pattern: peripheral nodular enhancement with centripetal fill-in on dynamic gadolinium sequences. This combination—very bright T2 signal plus the characteristic enhancement behavior on MRI—distinguishes hemangiomas from other liver lesions. Ultrasound can raise suspicion but is less specific, CT relies on enhancement patterns and lacks the T2 characterization, and PET-CT is not useful for benign vascular lesions.

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