Related Experiment Video
Updated: Feb 6, 2026

In vivo Imaging Method to Distinguish Acute and Chronic Inflammation
Published on: August 16, 2013
Imaging Workup of Acute and Occult Lower Gastrointestinal Bleeding
Trevor C Morrison1, Michael Wells2, Jeff L Fidler2
1Boston University Medical Center, 830 Harrison Avenue, FGH 3rd Floor, Boston, MA 02118, USA.
Abstract:
Lower gastrointestinal bleeding is defined as occurring distal to the ligament of Treitz and presents as hematochezia, melena, or with anemia and positive fecal occult blood test. Imaging plays a pivotal role in the localization and treatment of lower gastrointestinal bleeds. Imaging tests in the workup of acute lower gastrointestinal bleeding include computed tomography (CT) angiography, nuclear medicine scintigraphy, and conventional catheter angiography. Catheter angiography can also be used to deliver treatment. Imaging tests in the workup of occult lower gastrointestinal bleeding include CT enterography and nuclear medicine Meckel scan.
Related Concept Videos
Bleeding in Fresh Concrete
Bleeding can cause several issues in the concrete structure. Sometimes, the rising water gets trapped beneath large aggregate...
Anatomy of the Gastrointestinal System
Here's a detailed walkthrough of this complex system:
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
Gastrointestinal Motility Disorders
Histology of the Gastrointestinal (GI) Tract
The mucosa is sometimes called a mucous membrane due to its mucus-secreting features. This membrane is composed of epithelium, which directly interacts with ingested substances, and the lamina propria, a layer...
Physiology of the Gastrointestinal System I: Ingestion and Propulsion

