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Related Concept Videos

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...
Lower GI Series: Barium Enema01:23

Lower GI Series: Barium Enema

A Barium Enema, or a lower GI series, is a specialized radiographic examination designed to visualize the lower gastrointestinal tract, specifically the colon and rectum. This procedure is instrumental in diagnosing various conditions such as colorectal cancer, polyps, diverticulosis, and inflammatory bowel disease.
Procedure Details
The examination begins by inserting a lubricated rectal tube into the patient's rectum to administer a radiopaque barium solution. The barium flow is carefully...
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...
Intestinal Obstruction I: Introduction01:29

Intestinal Obstruction I: Introduction

Intestinal obstruction is a partial or complete blockage of the small or large intestine that disrupts the normal flow of intestinal contents through the lumen. This interruption impairs digestion, absorption, and fluid balance, and may lead to serious complications if not treated promptly.Mechanical ObstructionMechanical obstruction occurs when a physical blockage prevents intestinal contents from passing, arising from within the lumen or the bowel wall, or from external compression.Adhesions,...
Intestinal Obstruction II: Pathophysiology01:07

Intestinal Obstruction II: Pathophysiology

Intestinal obstruction triggers a series of physiological responses, starting with gas and fluid accumulation in the bowel segment proximal to the obstruction, leading to distension. This distended intestine compresses the diaphragm, hindering lung expansion and potentially leading to reduced respiratory effort, atelectasis, and pneumonia.To overcome the blockage, the gut intensifies contractions, causing colicky abdominal pain, nausea, and vomiting, which reduces fluid and food intake and...

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Related Experiment Video

Updated: Jul 21, 2026

Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans
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Computed tomography features of small bowel volvulus.

Y H Loh1, G D Dunn

  • 1Medical Imaging Department, Nepean Hospital, Penrith, New South Wales, Australia.

Australasian Radiology
|December 5, 2000
PubMed
Summary

This case study explains small bowel volvulus in adults, detailing key computed tomography (CT) findings. It highlights specific signs like the whirl, triangle, and beak signs for diagnosis.

Area of Science:

  • Gastroenterology
  • Radiology
  • Surgical Pathology

Background:

  • Small bowel volvulus is a rare but serious condition involving the twisting of the small intestine.
  • Early and accurate diagnosis is crucial for timely surgical intervention and preventing complications such as ischemia and necrosis.

Observation:

  • This report presents a clinical case of small bowel volvulus in an adult patient.
  • The diagnostic utility of computed tomography (CT) in identifying small bowel volvulus is emphasized.

Findings:

  • Key CT findings indicative of small bowel volvulus include an abnormal orientation of the superior mesenteric artery (SMA) relative to the superior mesenteric vein (SMV).
  • Specific pathognomonic signs on CT include the 'whirl sign,' 'triangle sign,' and 'beak sign,' which represent the twisted mesentery and bowel.

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  • These signs aid in differentiating volvulus from other causes of bowel obstruction.

    • Implications:

    • Recognition of these CT signs can lead to prompt diagnosis and management of small bowel volvulus.
    • Improved understanding of CT imaging characteristics can enhance surgical planning and patient outcomes.
    • This case contributes to the literature on the radiological diagnosis of small bowel volvulus in adults.