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Navigator‐triggered isotropic three‐dimensional magnetic resonance cholangiopancreatography in the diagnosis of malignant biliary obstructions: Comparison with direct cholangiography
Author(s) -
Choi JinYoung,
Lee Jeong Min,
Lee Jae Young,
Kim Se Hyung,
Lee Min Woo,
Han Joon Koo,
Choi Byung Ihn
Publication year - 2008
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.21038
Subject(s) - medicine , magnetic resonance cholangiopancreatography , percutaneous transhepatic cholangiography , endoscopic retrograde cholangiopancreatography , radiology , cholangiography , magnetic resonance imaging , bile duct , pancreatitis
Abstract Purpose To compare the diagnostic accuracy of navigator‐triggered isotropic three‐dimensional (3D) MR cholangiopancreatography (MRCP) using parallel imaging for malignant biliary obstruction with direct cholangiography. Materials and Methods A total of 23 patients with malignant biliary obstruction underwent MRCP and endoscopic retrograde cholangiopancreatography (ERCP)/percutaneous transhepatic cholangiography (PTC). Two observers retrospectively evaluated 3D‐MRCP and ERCP/PTC and recorded the level of obstruction and extent of tumor along with their confidence. The quality of images and morphologic appearance of stricture were also evaluated by two reviewers. The results of MRCP and ERCP/PTC were compared with surgical and histopathological data. Results 3D‐MRCP was of diagnostic quality and free of artifacts in all patients, whereas ERCP/PTC examinations failed in three patients. For the evaluation of level of obstruction, there was no statistical significance between 3D‐MRCP and ERCP/PTC. 3D‐MRCP was superior to ERCP/PTC in the assessment of anatomical extent of hilar bile duct involvement, but did not show statistical significance. The accuracy of 3D‐MRCP in determining tumoral extent of hilar cancer was higher than that of ERCP/PTC, but it was not statistically significant. The image quality of 3D‐MRCP was superior to ERCP/PTC. There was good agreement between morphologic appearance at MRCP and those at ERCP/PTC. Conclusion 3D‐MRCP can accurately assess the level of obstruction and extent of tumor in patients with malignant biliary obstruction. J. Magn. Reson. Imaging 2007. © 2007 Wiley‐Liss, Inc.