Scintigraphic evaluation of acute lower gastrointestinal hemorrhage: current status and future directions.

This review examines the role and limitations of scintigraphic evaluation in acute lower gastrointestinal hemorrhage. A detailed discussion of methods for improving diagnostic outcomes is provided. Techniques and recommendations are offered for optimization of red blood cell scintigraphy for earlier detection and more accurate localization of acute lower gastrointestinal hemorrhage.