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Current Situation and Future Perspective of for Colorectal Screening:CT Colonography and MR Colonography Ryoichi Nozaki 1 , Hiromi Arima 2 , Tetsuya Matsumoto 2 , Takayuki Maezaki 2 , Hidetaka Imuta 2 , Kazutaka Yamada 3 1Division of Gastroenterology, Coloproctology Center, Takano Hospital, Kumamoto, Japan 2Division of Radiology, Coloproctology Center, Takano Hospital, Kumamoto, Japan 3Division of Gastroenterological Surgery, Coloproctology Center, Takano Hospital, Kumamoto, Japan Keyword: CT colonography , 大腸がん検診 , 大腸癌 , 大腸ポリープ , 大腸内視鏡検査 , MR colonography pp.1175-1183
Published Date 2017/8/25
DOI https://doi.org/10.11477/mf.1403201148

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 CTC(computed tomographic colonography)is used to detect colorectal tumors, and the diagnostic accuracy is better for lesions with a diameter of ≧6mm, which are targets for screening. For tumors with a diameter of ≧10mm, the accuracy is almost the same as that of colonoscopy, which is regarded as the gold standard in colorectal screening. CTC is less invasive, and it has a relatively high diagnostic accuracy rate, making it a useful colorectal screening method. The clinical utility of CTC has been established in the field of colorectal cancer. Moreover, CTC is becoming the preferred preoperative examination over barium enema X-ray examination. In Japan, CTC will soon be a major part of the work-up examination for organized colorectal cancer screening. Recently, the number of facilities using CTC for opportunistic screening has increased. In order to firmly establish CTC as a screening method, we need to undertake the following tasks:clearly evaluate diagnostic accuracy, determine the processing capacity, identify adverse events, limit the radiation exposure of medical personnel, establish criteria for diagnostic facilities, standardize the pretreatment procedure, develop a method for taking and interpreting images, and establish an accreditation system for doctors and radiological technicians. Currently, there is little interest in trying to incorporate magnetic resonance colonography into the colorectal cancer screening procedure in Japan.


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

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