Virtual Colonoscopy: Procedure, Preparation & What to Expect

Virtual colonoscopy (CT colonography) uses X-rays and computer imaging to visualize the colon and rectum. Less invasive than optical colonoscopy; no scope insertion.

Procedure Steps

1. Preparation: Bowel cleansing via dietary restrictions, laxatives, or enemas (same as traditional colonoscopy).
2. Arrival: Change into gown; mild sedative optional.
3. IV Contrast (optional): Enhances visibility of colon lining.
4. Scanning: Lie on CT table; hold breath/change positions; scan takes minutes.
5. Image Processing: Software creates 2D and 3D images.
6. Examination: Radiologist analyzes for polyps, tumors, diverticula.
7. Results & Follow-Up: Discuss with doctor; abnormal findings may require traditional colonoscopy for biopsy/removal.

Pros & Cons

• Pros: Less invasive, no sedation required, quicker, visualizes entire colon.
• Cons: Still requires bowel prep; cannot remove polyps or take biopsies; radiation exposure; may miss small/flat lesions.

Follow your doctor's prep instructions carefully for accurate results.