%0 Journal Article %A Erin Grady %T Gastrointestinal Bleeding Scintigraphy in the Early 21st Century %D 2016 %R 10.2967/jnumed.115.157289 %J Journal of Nuclear Medicine %P 252-259 %V 57 %N 2 %X Gastrointestinal bleeding scintigraphy performed with 99mTc-labeled autologous erythrocytes or historically with 99mTc-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. %U https://jnm.snmjournals.org/content/jnumed/57/2/252.full.pdf