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Related Concept Videos

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
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Voiding Cystourethrography (VCUG) and Cystography are specialized radiographic procedures used to examine the structure and function of the bladder and urethra.Voiding Cystourethrography (VCUG)A Voiding Cystourethrogram (VCUG) is a diagnostic imaging procedure that assesses the anatomy and function of the lower urinary tract. It focuses on the bladder, bladder neck, and urethra, helping detect abnormalities such as vesicoureteral reflux (VUR)—the backward or reverse flow of urine into the...
Endoscopic Procedures II: Colonoscopy01:25

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Related Experiment Video

Updated: Jul 16, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
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Published on: July 11, 2025

Pitfalls in multi-detector row CT colonography: a systematic approach.

Thomas Mang1, Andrea Maier, Christina Plank

  • 1Department of Radiology, Medical University of Vienna, Waehringer Guertel, Vienna, Austria. thomas.mang@meduniwien.ac.at

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|March 22, 2007
PubMed
Summary

Computed tomographic (CT) colonography effectively detects colonic lesions but can lead to misdiagnosis. Careful preparation, understanding artifacts, and using combined imaging techniques improve diagnostic accuracy for CT colonography.

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Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
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Last Updated: Jul 16, 2026

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13:44

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Published on: August 30, 2013

Area of Science:

  • Radiology
  • Gastroenterology
  • Medical Imaging

Background:

  • Computed tomographic (CT) colonography is vital for colonic lesion detection and classification.
  • Potential for misdiagnosis exists due to issues in preparation, scanning protocols, and interpretation.
  • False-positive and false-negative findings can compromise diagnostic performance.

Purpose of the Study:

  • To identify common pitfalls in CT colonography.
  • To present techniques for overcoming diagnostic challenges.
  • To enhance the accuracy of CT colonography in identifying colonic lesions.

Main Methods:

  • Review of patient preparation protocols for optimal colon distension and cleanliness.
  • Analysis of morphologic and attenuation characteristics of colonic lesions and artifacts.
  • Application of combined two-dimensional and three-dimensional imaging approaches.

Main Results:

  • Proper patient preparation minimizes residual stool and fluid, reducing false positives.
  • Recognizing pseudolesions like haustral folds and mobile polyps is crucial.
  • Combined 2D and 3D imaging aids in differentiating true lesions from pseudolesions.

Conclusions:

  • CT colonography accuracy can be significantly improved through meticulous preparation and technique.
  • Understanding common pitfalls and employing problem-solving strategies are essential for radiologists.
  • Accurate differentiation between colonic lesions and pseudolesions enhances diagnostic confidence.