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- W1570760047 abstract "Colorectal cancer (CRC) is the second most prevalent type of cancer in Europe. Early detection and removal of CRC or its precursor lesions by population screening can reduce mortality.[1] An increasingly popular screening test for colorectal cancer is computed tomographic (CT) colonography, also called virtual colonoscopy (VC). It is a powerful technique for population screening of asymtomatic adults. It has potential advantages over conventional colonoscopy (CC) as it is less invasive, less time-consuming and less expensive. Moreover, no sedation is needed.[2] Its main disadvantages to CC are the exposure of individuals to ionizing radiation and the lack of ability to take tissue samples or to remove polyps during the procedure.[2-6] CT colonography was first described in 1994 as a radiographic technique in which thinsection images of pneumocolon could be reconstructed by sophisticated software into highresolution 2Dand 3D images.[7,8] Over time, improvements in hardware and software have allowed faster scanning, reduced exposure to radiation, and better imaging. Newer modes of imaging (called fly-through) can produce results that resemble endoscopic images and permit sophisticated characterization of detected lesions.[7,9-11] The ability of VC to detect colorectal polyps has been tested in a multitude of studies. VC appeared to be promising in high risk populations, with a reported sensitivity greater than 90% for polyps ≥10 mm. [12-14] To achieve such results, adequate bowel cleaning or fecal tagging and reader experience are essential. This chapter summarizes the main indications, the current techniques in patient preparation, data acquisition and data analysis as well as imaging features for common benign and malignant colorectal lesions." @default.
- W1570760047 created "2016-06-24" @default.
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- W1570760047 date "2011-11-07" @default.
- W1570760047 modified "2023-10-15" @default.
- W1570760047 title "Virtual Colonoscopy: Indications, Techniques, Findings" @default.
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- W1570760047 doi "https://doi.org/10.5772/19651" @default.
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