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01-05-2006 | Gastrointestinal

Preoperative staging of rectal cancer: accuracy of 3-Tesla magnetic resonance imaging

Authors: Chan Kyo Kim, Seung Hoon Kim, Ho Kyung Chun, Woo-Yong Lee, Seong-Hyeon Yun, Sang-Yong Song, Dongil Choi, Hyo Keun Lim, Min Ju Kim, Jongmee Lee, Soon Jin Lee

Published in: European Radiology | Issue 5/2006

Abstract

The purpose of this study was to evaluate the accuracy of 3-Tesla magnetic resonance imaging (MRI) for the preoperative staging of rectal cancer. Thirty-five patients with a primary rectal cancer who underwent preoperative 3-T MRI using a phased-array coil and had a surgical resection were enrolled in the study group. Preoperatively, three experienced radiologists independently assessed the T and N staging. A confidence level scoring system was used to determine if there was any perirectal invasion, and receiver operating characteristic (ROC) curves were generated. The interobserver agreement was estimated using κ statistics. The overall accuracy rate of T staging for rectal cancer was 92%. The diagnostic accuracy was 97% for T1, 89% for T2 and 91% for T3, respectively. The predictive accuracy for perirectal invasion by the three observers was high (Az>0.92). The interobserver agreement for T staging was moderate to substantial. The overall sensitivity, specificity, and accuracy for the detection of mesorectal nodal metastases were 80%, 98%, and 95%, respectively. In conclusion, preoperative 3-T MRI using a phase-array coil accurately indicates the depth of tumor invasion for rectal cancer with a low variability.

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Title: Preoperative staging of rectal cancer: accuracy of 3-Tesla magnetic resonance imaging
Authors: Chan Kyo Kim
Seung Hoon Kim
Ho Kyung Chun
Woo-Yong Lee
Seong-Hyeon Yun
Sang-Yong Song
Dongil Choi
Hyo Keun Lim
Min Ju Kim
Jongmee Lee
Soon Jin Lee
Publication date: 01-05-2006
Publisher: Springer-Verlag
Published in: European Radiology / Issue 5/2006
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-005-0084-2

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Preoperative staging of rectal cancer: accuracy of 3-Tesla magnetic resonance imaging

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