Jin-Young Choi, Presenter: Nothing to Disclose

Jeong Min Lee, Abstract Co-Author: Nothing to Disclose

Se Hyung Kim, Abstract Co-Author: Nothing to Disclose

Jae Young Lee, Abstract Co-Author: Nothing to Disclose

Joon Koo Han MD, Abstract Co-Author: Nothing to Disclose

Byung Ihn Choi, Abstract Co-Author: Nothing to Disclose

Min Woo Lee MD, Abstract Co-Author: Nothing to Disclose

Ji Yang Kim , Abstract Co-Author: Nothing to Disclose

Soo Jin Kim MD, Abstract Co-Author: Nothing to Disclose

et al, Abstract Co-Author: Nothing to Disclose

To evaluate the value of multiplanar reformations compared with standard axial images in the assessment of hilar and extrahepatic bile duct cancer.

Twenty-nine patients who have surgically and histopathologically confirmed bile duct cancer were included as a preoperative work-ups, all patients underwent contrast material-enhanced multidetector row computed tomography (MDCT), consisting of axial and multiplanar reformation (MPR) images. MDCT scan included the precontrast, arterial and portal phase images. Two blinded radiologists independently assessed the axial alone and the combined axial and MPR images in coronal and sagittal planes for the presence of tumor, and its extent, vascular involvement, and resectability. The results were compared with the standard of reference which was determined by a consensus panel of the two other experts who evaluated the clinical, surgical and pathologic findings and the follow-up data.

For the tumor detection, the area under the receiver operating characteristic curve (Az) was not significantly different between the axial alone group and the combined axial and MPR group in both readers (p=0.083 for reader 1, p=0.576 for reader 2). For the evaluation of tumoral extent, there was also no difference between the two image sets in both readers (P > 0.05). The correct diagnostic rate for the tumor extent was lower in hilar cancer than in the extrahepatic bile duct cancer. For the vascular involvement, the area under the receiver operating characteristic curve of axial images (0.801 for reader 1, 0.788 for reader 2) were not significantly different from reformat images (0.821 for reader 1, 0.635 for reader 2). For the respectability, there was no difference between axial images (Az= 0.581 for reader 1, 0.620 for reader 2) and reformat images (Az= 0.522 for reader 1, 0.547 for reader 2) in both readers.

The addition of MPR images to the standard axial images does not significantly improve the diagnostic performance of MDCT in the preoperative evaluation of the bile duct cancer.

Choi, J, Lee, J, Kim, S, Lee, J, Han, J, Choi, B, Lee, M, Kim , J, Kim, S, et al, , Assessment of Hilar and Extrahepatic Bile Duct Cancer Using Multislice CT: Value of Adding Multiplanar Reformations to Standard Axial Images.  Radiological Society of North America 2005 Scientific Assembly and Annual Meeting, November 27 - December 2, 2005 ,Chicago IL. http://archive.rsna.org/2005/4416865.html