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KMID : 1103720110650050495
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Journal of the Korean Society of Radiology
2011 Volume.65 No. 5 p.495 ~ p.503
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Comparative Study between Digital Tomosynthesis and Endoscopic Retrograde Cholangiopancreatography for the Evaluation of Common Bile Duct Stones: Focus on Detection and Stone Conspicuity
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Huh Ji-Mi
Baek Seung-Yon
Hwang Yun-Mi
Lee Jeong-Kyong
Kim Yoo-Kyung
Yi Sun-Young
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Abstract
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Purpose:To compare digital tomosynthesis with endoscopic retrograde cholangiopancreatography (ERCP) for the evaluation of common bile duct (CBD) stones as a complementary diagnostic tool.
Materials and Methods :Ninety six consecutive patients clinically suspected of having CBD stones underwent ERCP and digital tomosynthesis over 22 months, from December, 2008 to May, 2010. Fourteen patients were excluded. Therefore 82 patients were included in this study. The images were retrospectively reviewed to compare the results with the final analysis based on the consensus of two abdominal radiologists. An evaluation of the presence of CBD stones was followed by a determination of the margins for the stones, scored with a five-point conspicuity scale.
Results:Among the 82 patients, 54 collectively had 89 CBD stones and 28 had no stones. The sensitivity and specificity for the detection of CBD stones were 91.0% and 80.6% for ERCP, 92.1% and 93.5% for digital tomosynthesis, respectively. The average score was 3.29 for ERCP and 3.89 for digital tomosynthesis in 77 similar detected stones. Digital tomosynthesis demonstrated significantly better conspicuity than ERCP (p = 0.001).
Conclusion:Digital tomosynthesis is an effective and complementary diagnostic method for the evaluation of CBD stones.
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KEYWORD
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Choledocholithiasis , Tomography, X-Ray Computed , Cholangiopancreatography, Endoscopic Retrograde
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