title: Scintigraphic signs and pitfalls in lower gastrointestinal hemorrhage: the continued necessity of angiography.
abstract: Scintigraphy is useful in directing the angiographer to the source of bleeding and, if negative, in precluding emergency angiography, but it is not specific enough to supplant angiography totally.
mesh_terms: D000792:Angiography; D004912:Erythrocytes; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging*; D006801:Humans; D011877:Radionuclide Imaging; D013667:Technetium; D013671:Technetium Tc 99m Sulfur Colloid
chemical_list: D013671:Technetium Tc 99m Sulfur Colloid; D013667:Technetium