Normalized distance along the colon centerline: a method for correlating polyp location on CT colonography and optical colonoscopy.

Objective: The ability to accurately locate a polyp found on CT colonography (CTC) at subsequent optical colonoscopy (OC) is an important part of the successful implementation of CTC for colorectal cancer screening. The purpose of this study was to determine whether a polyp's normalized distance along the colon centerline derived from CTC data can accurately predict its location on OC.

Materials And Methods: The polyp population consisted of 152 polyps in 121 patients.