Value of adding T1-weighted image to MR cholangiopancreatography for detecting intrahepatic biliary stones.

Young Kon Kim, Chong Soo Kim, Jeong Min Lee, Seog Wan Ko, Gyung Ho Chung, Seung Ok Lee, Young Min Han, Sang Yong Lee

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalAJR. American journal of roentgenology
Volume187
Issue number3
DOIs
StatePublished - 1 Jan 2006

Fingerprint

Cholangiography
Endoscopic Retrograde Cholangiopancreatography
Bile Ducts
ROC Curve
Fats
Sensitivity and Specificity

Cite this

Kim, Young Kon ; Kim, Chong Soo ; Lee, Jeong Min ; Ko, Seog Wan ; Chung, Gyung Ho ; Lee, Seung Ok ; Han, Young Min ; Lee, Sang Yong. / Value of adding T1-weighted image to MR cholangiopancreatography for detecting intrahepatic biliary stones. In: AJR. American journal of roentgenology. 2006 ; Vol. 187, No. 3.
@article{4a5df98d416a41588ae87ec819b90f78,
title = "Value of adding T1-weighted image to MR cholangiopancreatography for detecting intrahepatic biliary stones.",
abstract = "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.",
author = "Kim, {Young Kon} and Kim, {Chong Soo} and Lee, {Jeong Min} and Ko, {Seog Wan} and Chung, {Gyung Ho} and Lee, {Seung Ok} and Han, {Young Min} and Lee, {Sang Yong}",
year = "2006",
month = "1",
day = "1",
doi = "10.2214/AJR.05.0266",
language = "English",
volume = "187",
journal = "American Journal of Roentgenology",
issn = "0361-803X",
publisher = "American Roentgen Ray Society",
number = "3",

}

Value of adding T1-weighted image to MR cholangiopancreatography for detecting intrahepatic biliary stones. / Kim, Young Kon; Kim, Chong Soo; Lee, Jeong Min; Ko, Seog Wan; Chung, Gyung Ho; Lee, Seung Ok; Han, Young Min; Lee, Sang Yong.

In: AJR. American journal of roentgenology, Vol. 187, No. 3, 01.01.2006.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Value of adding T1-weighted image to MR cholangiopancreatography for detecting intrahepatic biliary stones.

AU - Kim, Young Kon

AU - Kim, Chong Soo

AU - Lee, Jeong Min

AU - Ko, Seog Wan

AU - Chung, Gyung Ho

AU - Lee, Seung Ok

AU - Han, Young Min

AU - Lee, Sang Yong

PY - 2006/1/1

Y1 - 2006/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=33748441012&partnerID=8YFLogxK

U2 - 10.2214/AJR.05.0266

DO - 10.2214/AJR.05.0266

M3 - Article

C2 - 16928904

AN - SCOPUS:33748441012

VL - 187

JO - American Journal of Roentgenology

JF - American Journal of Roentgenology

SN - 0361-803X

IS - 3

ER -