| Value of adding T1-weighted image to MR cholangiopancreatography for detecting intrahepatic biliary stones. | |
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MedLine Citation:
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PMID: 16928904 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: The purpose of this study was to assess the value of adding a T1-weighted image to MR cholangiopancreatography (MRCP) to detect bile duct stones. MATERIALS AND METHODS: During a 30-month period, 148 patients suspected of having biliary stones and who underwent MRI including MRCP, a fat-suppressed T1-weighted fast low-angle shot (FLASH) sequence, and an axial HASTE sequence were enrolled in this study. The biliary stones were confirmed by ERCP, surgery, and percutaneous transhepatic cholangiography. Of these 148 patients, 73 had extrahepatic stones, 45 had intrahepatic stones, 20 had both extrahepatic and intrahepatic stones, and 10 had no biliary stones. Two separate sets of images, the MRCP set (composed of MRCP and axial HASTE) and the combined interpretion of the MRCP set and the T1-weighted image, were analyzed independently and separately by two observers. The diagnostic accuracy was evaluated using the receiver operating characteristic method. The sensitivity and specificity were also calculated. RESULTS: For common duct stones, the diagnostic accuracy and the sensitivity of both image sets showed similar values without any significant difference (0.998 [97.8%] for the combined interpretation; 0.988 [97.8%] for observer 1 and 0.995 [96.8%] for observer 2 for the MRCP set). However, for the intrahepatic stones, the diagnostic accuracy (0.993) and the sensitivity (98.5%) of the combined interpretation were significantly higher than those of the MRCP set for the two observers (0.926 [83.8%] for observer 1 and 0.922 [85.3%] for observer 2) (p < 0.05). No significant difference was seen in the specificity of the two image sets for both the intrahepatic and the common duct stones. CONCLUSION: Combining the axial T1-weighted image with MRCP is valuable for detecting intrahepatic stones. |
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Authors:
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Young Kon Kim; Chong Soo Kim; Jeong Min Lee; Seog Wan Ko; Gyung Ho Chung; Seung Ok Lee; Young Min Han; Sang Yong Lee |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: AJR. American journal of roentgenology Volume: 187 ISSN: 1546-3141 ISO Abbreviation: AJR Am J Roentgenol Publication Date: 2006 Sep |
Date Detail:
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Created Date: 2006-08-24 Completed Date: 2006-09-12 Revised Date: 2008-02-15 |
Medline Journal Info:
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Nlm Unique ID: 7708173 Medline TA: AJR Am J Roentgenol Country: United States |
Other Details:
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Languages: eng Pagination: W267-74 Citation Subset: AIM; IM |
Affiliation:
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Department of Diagnostic Radioology, Chonbuk National University Medical School and Hospital, 634-18 Keumam dong, Jeonju, Chonbuk, South Korea. jmyr@dreamwiz.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Cholangiopancreatography, Magnetic Resonance / methods* Female Gallstones / diagnosis* Humans Male Middle Aged Reproducibility of Results Sensitivity and Specificity |
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