Editing Virtual colonoscopy (section)

==Advantages==
VC may be more comfortable for some individuals, as it does not require the use of a colonoscope. As a result, no sedation is needed, and the patient can return to his/her usual activities or go home after the procedure without the aid of another person. The lack of sedation also lowers the risk of the procedure since some people may have adverse reactions to sedative medications used during conventional colonoscopy.  VC provides clearer, more detailed images than a conventional x-ray using a [[barium enema]], sometimes called a lower gastrointestinal (GI) series. Further, about 1 in 10 patients will not have a complete right colon (cecum) evaluation completed with conventional colonoscopy.<ref name="pmid15666105">{{cite journal |author=Menardo G |title=Sensitivity of diagnostic examinations for colorectal polyps |journal=Tech Coloproctol |volume=8 |pages=s273–5 |date=December 2004 |issue=Suppl 2 |pmid=15666105 |doi=10.1007/s10151-004-0175-0|s2cid=12918901 }}</ref> It also takes less time than either a conventional colonoscopy or a lower GI series.<ref>[http://www.mayoclinic.com/health/virtual-colonoscopy/CO00025 Virtual Colonoscopy] - [[Mayo Clinic]]. "Virtual colonoscopy is typically faster than traditional colonoscopy. A scan of your colon takes about 10 minutes. Expect the entire virtual colonoscopy procedure to take 20 to 30 minutes."</ref>

VC provides a secondary benefit of revealing diseases or abnormalities outside the colon.<ref name="pmid16040909">{{cite journal |author=Yee J |title=Extracolonic abnormalities discovered incidentally at CT colonography in a male population |journal=Radiology |volume=236 |issue=2 |pages=519–26 |date=August 2005 |pmid=16040909 |doi=10.1148/radiol.2362040166 |url=http://radiology.rsnajnls.org/cgi/pmidlookup?view=long&pmid=16040909 |access-date=2008-12-22 |name-list-style=vanc|author2=Kumar NN |author3=Godara S |display-authors=3 |last4=Casamina |first4=J. A. |last5=Hom |first5=R. |last6=Galdino |first6=G. |last7=Dell |first7=P. |last8=Liu |first8=D.|url-access=subscription }}</ref> One study of asymptomatic adults undergoing routine VC found that approximately one unsuspected extracolonic cancer was detected per 300 screenings in addition to about one invasive colorectal cancer per 500 screenings, for an overall rate of approximately one unsuspected cancer of any type detected per 200 screenings. Invasive colorectal cancer was the most common malignancy detected, followed by [[renal cell carcinoma]].<ref>{{cite journal|last=Pickhardt|first=Perry J.|date=April 2010|title=Colorectal and Extracolonic Cancers Detected at Screening CT Colonography in 10,286 Asymptomatic Adults|url=https://pubs.rsna.org/doi/pdf/10.1148/radiol.09090939|journal=Radiology|volume=255-1|issue=1 |pages=83–88|doi=10.1148/radiol.09090939 |pmid=20308446 |url-access=subscription}}</ref>