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Related Concept Videos

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 IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...

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Related Experiment Video

Updated: Jun 18, 2026

Multimodality Diagnosis of Mesenteric Ischemia
05:07

Multimodality Diagnosis of Mesenteric Ischemia

Published on: July 21, 2023

MR imaging in gastrointestinal emergencies.

Jaroslaw N Tkacz1, Stephan A Anderson, Jorge Soto

  • 1Department of Radiology, Boston University Medical Center, 820 Harrison Ave, Boston, MA 02118, USA. Jaroslaw.Tkacz@bmc.org

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|December 5, 2009
PubMed
Summary

Computed tomography (CT) and magnetic resonance (MR) imaging are vital for diagnosing acute gastrointestinal conditions. While CT is widely available, MR imaging offers an alternative, especially when radiation or contrast allergies are concerns.

Related Experiment Videos

Last Updated: Jun 18, 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:

  • Accurate and rapid diagnostic imaging is crucial for managing acute gastrointestinal conditions.
  • Computed tomography (CT) is the primary imaging modality due to its availability and efficiency.
  • Magnetic resonance (MR) imaging presents a growing alternative with specific advantages.

Purpose of the Study:

  • To compare the utility of CT and MR imaging in diagnosing acute gastrointestinal conditions.
  • To highlight the adaptability of CT protocols for various diagnoses.
  • To explore the potential and limitations of MR imaging in acute care settings.

Main Methods:

  • CT protocols are adjusted by manipulating contrast material volume, injection rate, and acquisition delay.
  • MR imaging utilizes improved sequences, advanced coil technology, and streamlined protocols.
  • Both modalities are evaluated for diagnosing conditions like pancreatitis, appendicitis, and biliary tract issues.

Main Results:

  • CT enables rapid diagnosis of a wide spectrum of gastrointestinal diseases.
  • MR imaging accurately demonstrates various acute abdominal conditions, including trauma, choledocholithiasis, and gallbladder disease.
  • MR imaging is valuable for follow-up assessments and clarifying indeterminate CT findings.

Conclusions:

  • CT remains a cornerstone for acute gastrointestinal diagnosis due to its accessibility and speed.
  • MR imaging is an increasingly viable option, particularly for radiation-sensitive patients or those with contrast allergies.
  • Limitations for MR imaging include equipment availability and patient-specific factors, but its role is expanding.