What is Virtual Colonoscopy?

Virtual Colonoscopy is a quick screening procedure that does not require the use of an endoscope to evaluate the colon. A CT scanner is used to gather detailed images of the colon. The procedure is used to diagnose colon or bowel disease such as polyps, diverticulosis, and cancer.

Significance:

● Colon cancer is the third most commonly diagnosed form of cancer in the United States.
   It is second only to lung cancer as a cancer cause of death.
● In excess of 50,000 Americans die each year from colon cancer.
● Approximately 5% of all Americans will be diagnosed with colon cancer at some time in their life.
● Smoking, drinking, sedentary lifestyle, obesity, and a diet high in fats and low in fruits and
   vegetables all increase the risk of colon cancer.
● Colon cancer progresses very slowly, which means the survival / cure rate can be as high
   as 90% if the cancer is detected early.
● Unfortunately, less than half of the U.S. population over the age of 50 has ever had any
   screening for colon cancer, and less than 20% of this population has ever had a colonoscopy.

 

Common uses for Virtual Colonoscopy

This procedure is designed to detect cancer and polyps (small growths that may become cancerous) in the colon. More than 95% of all colon cancers start as benign polyps that gradually transform to a malignant state over a ten to fifteen year period.

Virtual Colonoscopy is also helpful to assess patients who are unable to tolerate or complete a traditional colonoscopy.

How does it work?

During the procedure,

● The patient lays down on their back
● A thin tube is inserted into the rectum, and air is introduced through the tube to distend
   the colon for optimal viewing
● The patient then moves through a CT scanner that produces a series of 3D cross-sectional
   images along the length of the colon.
● A single breath hold of 15-20 seconds is required during the scan to avoid distortion of
   the images.
● The same scan is then repeated with the patient lying on their stomach.
● The tube is then removed and the procedure is over.

For whom appropriate:

Men and women 50 or older as well as younger individuals with the following risk factors should also be considered:

● Family history of colon cancer
● Personal history of inflammatory bowel disease
● Persona history of endometrial and/or breast cancer

For whom NOT appropriate:

Anyone with:

● Personal history of polyps
● Suspected toxic megacolon
● Recent colonic biopsy
● Suspected Hirschsprung's disease
● Suspected acute diverticulitis
● Suspected colitis, all causes
● Suspected colonic fistula
● Previous anal, rectal and/or colonic surgery

Preparation

While taking preparation for this exam varies, the patient will usually be asked to take laxatives or other oral agents the day before the procedure to clear stool from the colon and to ensure an optimal exam. Virtual colonoscopy does not require the use of sedatives.

After the test

Patients are able to return to normal activities immediately following the scan.

Results

At Lifescape Imaging - Cypress, we have a radiologist / cardiologist on site for the exam to be interpreted promptly. All of our radiologists are Board Certified by the American College of Radiology. The results will be phoned, faxed, mailed, or delivered electronically to the referring physician. Your referring physician will share the results with you.