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Japanese

An Evaluation of Tumor Invasion on the Gastrointestinal Wall Using MR Endoscopy Fumiaki Kitahara 1 , Tadashi Sato 1 , Toshiya Nakamura 1 , Yuichiro Kojima 1 , Masayuki A. Fujino 1 1The First Department of Internal Medicine, Yarmanashi Medical University 2Department of Radiology, Yamanashi Medical University Keyword: MR内視鏡 , 深達度診断 , 胃癌 , 食道癌 pp.423-427
Published Date 2001/2/26
DOI https://doi.org/10.11477/mf.1403103165
  • Abstract
  • Look Inside

 Conventional magnetic resonance (MR) imaging of esophageal and gastric cancer is performed with body and surface coils. Body and surface coils often inadequately depict invasion into the esophageal adventitia or the gastric serosa. We performed local staging of esophageal and gastric cancer using an MR endoscope with a 3 cm-long receive-only coil embedded in its tip. MR endoscopy was performed with T1-weighted, fast-spin-echo T2-weighted, and frequency-selective fat-satu-rated T1-weighted gadolinium enhanced sequences. We are also investigating the optimal combination of a phased-array surface coil with the endoscopic coil to improve signal-to-noise ratio in our images. Esophageal cancer was imaged by a high-intensity display on Tl-weighted imaging and fast spin-echo. Gastric cancer was imaged by a low-intensity display on T1-weighted imaging and fast SPGR. Compared to endoscopic ultrasonography, we obtained clearer images of esophageal and gastric cancer in the deep layer by MR endoscopy. The advantages of endoscopic MRI are as follows: The three-dimensional tomography provided by this method enables us to select the area to be scanned, produces images that differ from those obtained with endoscopic ultrasonography or CT scanning, and allows us to evaluate the character of the tumor tissue by changing pulse sequence parameters, selecting adequate gradient-echo sequences, or using contrast media. We concluded that there are important potential advantages using this technique in lesion staging and patient treatment planning.


Copyright © 2001, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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