Assessment of hilar and extrahepatic bile duct cancer using multidetector CT: value of adding multiplanar reformations to standard axial images |
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Authors: | Jin-Young Choi Jeong Min Lee Jae Young Lee Se Hyung Kim Min Woo Lee Joon Koo Han Byung Ihn Choi |
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Institution: | (1) Department of Radiology, and Institute of Radiation Medicine, Seoul National University College of Medicine, 28, Yongon-Dong, Chongno-Gu, Seoul, 110-744, South Korea;(2) Department of Radiology, Konkuk University Hospital, Seoul, South Korea;(3) Department of Diagnostic Radiology, Yonsei University College of Medicine, 134 Shinchon-Dong, Seodaemun-ku, 120-752 Seoul, South Korea |
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Abstract: | To retrospectively assess the value of multiplanar reformations (MPRs) compared with standard axial images in the assessment
of hilar and extrahepatic bile duct cancer. Forty-eight patients with confirmed bile duct cancer were included as preoperative
work-ups; all of these patients underwent contrast-enhanced multidetector CT consisting of axial and MPR images. Two radiologists
independently assessed the axial images alone and the combined axial and MPR images in the coronal and sagittal planes for
the presence of tumor, its extent, vascular involvement, and resectability. The results were compared with surgical and pathologic
findings. For tumor presence and conspicuity, combined axial and MPR images had higher values than the axial only images.
For evaluation of tumoral extent, there was no difference between the two image sets for either reader. The accuracy for tumor
extent was lower in hilar cancer than in extrahepatic bile duct cancer. For evaluation of vascular involvement and resectability,
the area under the receiver operating characteristic curve of axial images was not significantly different from that of the
reformatted images.The addition of MPR images to the standard axial images did not significantly improve the diagnostic performance
of MDCT in the evaluation of the bile duct cancer. |
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Keywords: | Bile duct cancer Hilar cholangiocarcinoma Multiplanar reformat Multidetector CT |
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