Fundamental elements for successful performance of CT colonography (virtual colonoscopy)

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Park, Seong Ho; Yee, Judy; Kim, Se Hyung; Kim, Young Hoon
Issue Date
The Korean Radiological Society
Korean J Radiol 2007;8(4):264-275
Carbon Dioxide/administration & dosageCathartics/therapeutic useColonic Polyps/radiographyColonography, Computed Tomographic/*methodsContrast Media/administration & dosageDiagnosis, Computer-AssistedFecesHumansImaging, Three-DimensionalInsufflation/methods
There are many factors affecting the successful performance of CT colonography (CTC). Adequate colonic cleansing and distention, the optimal CT technique and interpretation with using the newest CTC software by a trained reader will help ensure high accuracy for lesion detection. Fecal and fluid tagging may improve the diagnostic accuracy and allow for reduced bowel preparation. Automated carbon dioxide insufflation is more efficient and may be safer for colonic distention as compared to manual room air insufflation. CT scanning should use thin collimation of < or =3 mm with a reconstruction interval of < or =1.5 mm and a low radiation dose. There is not any one correct method for the interpretation of CTC; therefore, readers should be well-versed with both the primary 3D and 2D reviews. Polyps detected at CTC should be measured accurately and reported following the "polyp size-based" patient management system. The time-intensive nature of CTC and the limited resources for training radiologists appear to be the major barriers for implementing CTC in Korea.
1229-6929 (Print)
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College of Medicine/School of Medicine (의과대학/대학원)Dept. of Radiation Applied Life Science (대학원 협동과정 방사선응용생명과학전공)Journal Papers (저널논문_방사선응용생명과학)
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