title: Gastrointestinal Bleeding Scintigraphy in the Early 21st Century.
abstract: Gastrointestinal bleeding scintigraphy performed with (99m)Tc-labeled autologous erythrocytes or historically with (99m)Tc-sulfur colloid has been a clinically useful tool since the 1970s. This article reviews the history of the techniques, the different methods of radiolabeling erythrocytes, the procedure, useful indications, diagnostic accuracy, the use of SPECT/CT and CT angiography to evaluate gastrointestinal bleeding, and Meckel diverticulum imaging. The causes of pediatric bleeding are discussed by age.
authors.affiliation: Section of Nuclear Medicine, Department of Radiology, Christiana Care Health System, Newark, Delaware egrady@christianacare.org.
authors.forename: Erin
authors.initials: E
authors.lastname: Grady
mesh_terms: D000375:Aging; D002648:Child; D004912:Erythrocytes / Q000000981:diagnostic imaging; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging*; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D008467:Meckel Diverticulum / Q000000981:diagnostic imaging; D009683:Nuclear Medicine / Q000193:education; D019275:Radiopharmaceuticals; D015899:Tomography, Emission-Computed, Single-Photon / Q000266:history / Q000379:methods*
chemical_list: D019275:Radiopharmaceuticals
keywords: CTA; GI bleeding scintigraphy or scan; Meckel’s diverticulum; SPECT; SPECT/CT; pediatric GI bleeding by age; radiolabeled red blood cells or erythrocytes