The PillCam Colon Capsule Endoscopy (Given® Diagnostic System)offers an alternative approach for endoscopic visualization of the colon in patients with an incomplete conventional colonoscopy. Advantages of the PillCam Colon Capsule Endoscopy (PCCE) include the elimination of the need for sedation, the minimally invasive, painless nature of the exam, no need of X-rays and the ability to pursue normal daily activities immediately following the procedure. This is a study that is designed to evaluate the performance of the PCCE in the evaluation of patients with an incomplete colonoscopy, compared to the CT-colonography. PCCE and CT-colonography procedures will be compared in regards to completeness of the procedure and detection of lesions in the colon that would have been missed by the incomplete conventional colonoscopy.