CT Virtual Colonoscopy (CT colonography)

  • Early detection colon cancer in adults ages 50 years and over.
  • Unlike conventional colonoscopy, which needs a scope to be inserted into your rectum and pass through your colon, virtual colonoscopy uses a CT scan to provide cross-sectional images of your organs. The images then digitally manipulated to offer an in depth view of the inside of the colon and rectum.

Your doctor may suggest virtual colonoscopy if you:

  • Refused to have colonoscopy.
  • Are at risk of colonoscopy complications, such as excess bleeding.
  • This procedure should not be performed if you are or might be pregnant.
  • Recent colorectal, abdominal or pelvic surgery.
  • Active colonic inflammation.
  • You’ll need to empty your colon before the exam. It is extremely important that you follow the preparation instructions closely.
  • To empty your colon, you may be asked to do the following the day before the exam:
    • Avoid eating any solid food, just clear liquids only. Stop eating or drinking anything after midnight.
    • Take a laxative.
  • A radiology nurse or technologist will ask you a few questions regarding your medical history.
  • You’ll wear a gown, and you’ll begin the exam lying on your side on the exam table.
  • The nurse will distend your colon with air by inserting a small rectal tube that is connected to a syringe. The air or gas may cause a feeling of pressure in your abdomen.
  • You will be scanned initially lying on your back and then you’ll turn over to lie on your abdomen and you will be scanned again.
  • You will be asked to hold your breath during each scan for about 20 seconds.
  • The entire examination is usually completed within 15 minutes
  • The exam is done on one of the latest Multislice CT machines from GE, SIEMENS & PHILIPS in Alfa scan branches
  • After the scan is complete, you may feel bloated and will want to go to the bathroom to expel the remaining gas.
  • You can resume your usual activities after the exam.

Virtual colonoscopy is generally safe. Risks include:

  • A small risk of causing a tear in the colon or rectum.
  • Exposure to a low level of radiation.