Radionuclide diagnosis of gastrointestinal hemorrhage  WANG Shao-yan, ZUO Chang-jing. Department of Nuclear Medicine, Changhai Hospital, the Second Military Medical University, Shanghai 200433,China
Corresponding author: ZUO Chang-jing, E-mail：changjing.zuo@gmail.com
Abstract    Sensitive detection and accurate location of the hemorrhagic lesions are very important for the timely treatment of gastrointestinal hemorrhage. As a non-invasive, safe and effective technique, radionuclide imaging can detect gastrointestinal hemorrhage lesions sensitively. It is very useful for the examination of small intestine where gastrofiberscope and colonoscopy can not reach, and the chronic intermittent bleeding or occult bleeding with lesions which other methods failed to detect. Improvement on the methods, such as sequential subtraction scintigraphy and dynamic imaging, has made up for deficiency of  location accuracy of radionuclide imaging to a certain extent. SPECT / CT, with high-resolution anatomical imaging and high-sensitivity function imaging fusion, greatly increased the location accuracy of gastrointestinal hemorrhage and reduced false-negative and false-positive of radionuclide imaging.