| Theme | Now and Feature of CT Colonography | |
|---|---|---|
| Title | Usefulness of CT Colonography in Cases Having Incomplete Colonoscopy | |
| Publish Date | 2014/09 | |
| Author | Ryoichi Nozaki | Division of Gastroenterology, Coloproctology Center, Takano Hospital |
| Author | Tetsuya Matsumoto | Divison of Radiology, Coloproctology Center, Takano Hospital |
| Author | Takayuki Maezaki | Divison of Radiology, Coloproctology Center, Takano Hospital |
| Author | Hiromi Arima | Divison of Radiology, Coloproctology Center, Takano Hospital |
| Author | Hidetaka Imuta | Divison of Radiology, Coloproctology Center, Takano Hospital |
| Author | Kazutaka Yamada | Division of Gastroenterological Surgery, Coloproctology Center, Takano Hospital |
| [ Summary ] | The diagnostic accuracy of CT colonography (CTC) for colorectal tumors 5 mm or larger is comparable to that of total colonoscopy (TCS) in terms of sensitivity, specificity, and positive predictive rates. Unlike TCS, CTC is advantageous in terms of being non-invasive, not requiring skillful techniques, and providing the ability to examine the bowel lumen and adjacent organs at the same time based on CT information. In cases having incomplete TCS or failure to insert the colonoscope as far as the cecum, CTCs are usuful for examination of the whole large bowel, including the proximal side of the lumen where the colonoscope was not inserted. CTC is also useful as a preoperative examination tool for oral side obstructions caused by colorectal cancer in cases where a colonoscope was not able to pass through the obstruction. Digital preparions such as residual fluid tagging are recommended to achieve further improvements in diagnostic accuracy. CTC is a highly accurate and useful diagnostic modality for cases having incomplete TCS. |
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