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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Affiliation: | (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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