Dynamic MR imaging of hepatolithiasis |
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Authors: | T C L Soong R C Lee H C Cheng J H Chiang H S Tseng C W Lin M M H Teng |
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Institution: | (1) Department of Radiology, Veterans General Hospital-Taipei, 201 Sec. 2 Shih-Pai Road, Shihlin 11217 Taipei, Taiwan; and Department of Radiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, TW |
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Abstract: | Background: To report the dynamic magnetic resonance (MR) imaging findings of hepatolithiasis.
Methods: Dynamic MR images (fast spoiled gradient echo sequence with intravenous injection of gadopentate dimeglumine) and computed
tomography, cholangiography, or angiography of nine patients with hepatolithiasis are analyzed.
Results: All affected hepatic segments showed atrophic changes and contained dilated intrahepatic ducts. These segments showed either
iso- or hypointensity on T1-weighted imaging and hyperintensity on T2-weighted imaging. Preferential enhancement was noted
throughout all phases of the dynamic study and persisted to delayed T1-weighted imaging in seven patients. In the last two
patients, severe atrophic changes made evaluating signal intensity differences and enhancement patterns difficult.
Conclusion: In addition to intrahepatic stones and biliary dilatation, segmental atrophy, signal intensity differences, and preferential
and persistent enhancement are important MR findings of hepatolithiasis.
Received: 18 June 1997/Accepted: 23 July 1997 |
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Keywords: | : MR— Liver— Hepatolithiasis— Cholangitis— Contrast enhancement— Portal vein obstruction |
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