The first imaging examination is usually a double contrast barium enema. This provides a thorough evaluation of potential polyps, tumor, diverticulosis, or mucosal disease. In the absence of acute or rapidly progressive symptoms, the BE should be ordered routinely. Please note that there is only a 2% true positive rate for the stool guiac test. Colonoscopy is an alternative to the barium enema. The next examination, if necessary, is the UGI to evaluate the proximal portions of the GI tract. If further imaging is required options include CT, the NM bleeding scan or Meckels scan, and small bowel enteroclysis (a somewhat uncomfortable dedicated fluoroscopic examination of the small bowel via an NG tube).