RT Journal Article SR Electronic T1 Radiologic diagnosis and management of acute lower gastrointestinal bleeding JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 417 OP 420 VO 74 IS 6 A1 Padia, Siddharth A. A1 Bybel, Bohdan A1 Newman, James S. YR 2007 UL http://www.ccjm.org/content/74/6/417.abstract AB In patients with acute lower gastrointestinal bleeding, colonoscopy is the initial test of choice. But when colonoscopy gives indeterminate results or cannot be performed, either radionuclide imaging or angiography is indicated.