High-risk populations are far more likely to have suspicious growths that need to be removed, Rex points out.
"I don't see how a diagnosis-only strategy like CT colonography makes sense," he says.
One big drawback is that virtual colonoscopy can only detect growths, requiring another procedure to remove them.
Traditional colonoscopy can detect and remove them in the same procedure.
Virtual Bangladesh is an award winning site about the beautiful nation of Bangladesh.