Unsuspected extracolonic findings at screening CT colonography: clinical and economic impact. Radiology 249 , 151–159 (2008). Article Google Scholar ...

The number currently being done is not known, but in a 2003 UK national survey, 36% of radiology departments ... cancers following a paired CT colonography procedure giving an effective dose of 8 mSv.

The problem: Some doctors recommend CT colonography, or "virtual colonoscopy," over the regular ... with advice from the American College of Radiology. 6 questions to ask before any imaging ...