virtual colonoscopy


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virtual colonoscopy

n.
A screening examination of the colon in which x-rays obtained by CAT scan are used to generate computerized three-dimensional images of the colonic mucosa.

virtual colonoscopy

an imaging technique, used for examination of the colon, in which cross-sectional images acquired by computed tomography or magnetic resonance imaging are processed by computer to reconstruct a three-dimensional display of the colonic lumen.
A diagnostic procedure in which 2-dimensional helical CT images are converted into 3-dimensional images of the colonic mucosa similar to those obtained by conventional colonoscopy.

virtual colonoscopy

Imaging A diagnostic procedure in which 2-D helical CT images are converted into 3-D images of the colonic mucosa that are similar and an alternative to those obtained by conventional colonoscopy.
See Colonoscopy, CT colography, Double contrast barium enema.
References in periodicals archive ?
PROCEDURE ADVANTAGES AND DISADVANTAGES Virtual Colonoscopy Traditional Colonoscopy Detects large polyps + + Can miss polyps < ++ + 10mm Needs bowel + + preparation Can remove polyp - + during procedure Air blown into + + colon to inflate it Adverse effects Abdominal pain, Abdominal pain, 'incidentalomas' perforation, bleeding (usually with polyp removal)
The first multicenter prospective trial found that virtual colonoscopy compared well with traditional colonoscopy in the detection of polyps
A deflation maneuver that lasts only 4 seconds can alleviate roughly 6 minutes of pain during virtual colonoscopy, he reported.
While most evidence suggests that virtual colonoscopy is comparable to optical colonoscopy for detecting large polyps, not all data agree.
Virtual colonoscopy uses a CT scan and computer software to produce images of the colon and rectum.
As yet, Medicare and most insurance companies do not reimburse the cost of virtual colonoscopy for colon cancer screening.
Because cardiovascular disease is often asymptomatic prior to a heart attack, researchers wanted to see if they could use virtual colonoscopy to measure calcium deposit levels within the aorta and its branching vessels without the need for additional testing.
Carrascosa reported at an international symposium on virtual colonoscopy sponsored by Boston University.
In fact, while 70 percent of those in the study agreed that the virtual colonoscopy was more convenient, 54 percent reported that it was more uncomfortable than the traditional screening.
Besides eliminating the "invasion" of a tube or scope, virtual colonoscopy requires no sedation, anesthesia or hospital stay.
Don't expect virtual colonoscopy to boost colon cancer detection rates.
The price of virtual colonoscopy is generally lower as well--ranging from about $700 to $1,000, compared to $1,000 to $2,500 for the older method--and is covered by some insurance companies.

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