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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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
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In gastric emptying studies, a meal's liquid and solid...

Computed Tomography

Computed Tomography

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Imaging Studies III: Computed Tomography

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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...

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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...

Endoscopic Procedures II: Colonoscopy

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The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:

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Related Experiment Video

Updated: Jun 15, 2026

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

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Computed tomographic colonography: hope or hype?

Otto Schiueh-Tzang Lin

World Journal of Gastroenterology

|February 25, 2010

Summary

Computed tomographic colonography (CTC) shows promise for colon imaging, with high accuracy for large polyps comparable to colonoscopy. Further research is needed to define its exact clinical role and optimize techniques for future screening.

Area of Science:

Medical Imaging
Gastroenterology
Diagnostic Technology

Background:

Computed tomographic colonography (CTC) is an emerging imaging technique for the colon.
Current data covers CTC technique, test characteristics, patient acceptance, safety, cost-effectiveness, follow-up, and extracolonic findings.

Discussion:

CTC technique is evolving, requiring further research on automated insufflation, relaxants, contrast agents, software, and positioning.
Full bowel preparation is currently necessary for optimal CTC results.
Sensitivity for large polyps (>1 cm) is up to 85%, with specificity up to 97%, comparable to conventional colonoscopy.

Key Insights:

Patient acceptance of CTC is generally higher than conventional colonoscopy.
CTC is generally safe, with rare instances of perforation.

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Published on: December 2, 2013

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Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

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Dual-phase Cone-beam Computed Tomography to See, Reach, and Treat Hepatocellular Carcinoma during Drug-eluting Beads Transarterial Chemo-embolization

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Cost-effectiveness is debated, suggesting CTC may only be viable if significantly cheaper than colonoscopy.

Outlook:

The precise clinical role of virtual colonoscopy is yet to be determined.
Technological advancements, including multi-detector CT scanners and stool-tagging, may enhance CTC.
Computer-aided detection software could minimize reading errors, paving the way for future CTC screening applications.