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Related Concept Videos

Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit 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 solid...
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...

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Related Experiment Video

Updated: Jun 1, 2026

Multimodality Diagnosis of Mesenteric Ischemia
05:07

Multimodality Diagnosis of Mesenteric Ischemia

Published on: July 21, 2023

[Acute gastrointestinal bleeding - diagnosis with computed tomography].

H Scheffel1, M A Fischer, T Pfammatter

  • 1Institut f. Diagnostische und Interventionelle Radiologie, Unispitätsspital Zürich. hscheffel@partners.org

Praxis
|June 10, 2011
PubMed
Summary

Computed tomography (CT) is a quick, accurate imaging tool for diagnosing acute gastrointestinal bleeding. Its reliability makes it a potential first-line test for severe bleeding, aiding surgical or interventional planning.

Related Experiment Videos

Last Updated: Jun 1, 2026

Multimodality Diagnosis of Mesenteric Ischemia
05:07

Multimodality Diagnosis of Mesenteric Ischemia

Published on: July 21, 2023

Area of Science:

  • Radiology
  • Gastroenterology
  • Medical Imaging

Background:

  • Acute gastrointestinal bleeding is a significant clinical challenge.
  • Accurate localization and identification of bleeding sources are crucial for effective management.
  • Current diagnostic modalities have limitations in speed, invasiveness, or accuracy.

Purpose of the Study:

  • To evaluate the role of computed tomography (CT) in diagnosing acute gastrointestinal bleeding.
  • To assess CT's ability to localize the bleeding source and guide treatment.
  • To determine CT's potential as a first-line imaging modality for severe gastrointestinal hemorrhage.

Main Methods:

  • Review of computed tomography imaging in patients presenting with acute gastrointestinal bleeding.
  • Analysis of CT findings for bleeding localization and source identification.
  • Correlation of CT results with subsequent interventional or surgical outcomes.

Main Results:

  • Computed tomography provides fast and non-invasive visualization of gastrointestinal bleeding.
  • CT accurately identifies the location and source of bleeding in a high percentage of cases.
  • Information from CT aids in planning and executing timely interventional or surgical procedures.

Conclusions:

  • Computed tomography is a robust and accurate imaging modality for acute gastrointestinal bleeding.
  • Its availability and speed make it suitable as a first-line diagnostic tool.
  • CT facilitates effective management of life-threatening gastrointestinal hemorrhage.