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Related Experiment Video

Updated: Apr 12, 2026

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Virtual enteroscopy using air as the contrast material: a preliminary feasibility study.

Kazuhiro Endo1, Kenichi Utano, Kazutomo Togashi

  • 1Department of Surgery, Jichi Medical University, Tochigi-ken, Japan.

Digestive Endoscopy : Official Journal of the Japan Gastroenterological Endoscopy Society
|July 21, 2010
PubMed
Summary
This summary is machine-generated.

Air is a feasible enteral contrast agent for virtual enteroscopy, enabling clear visualization of small bowel structures and lesions. This study demonstrates its safety and effectiveness in expanding the small bowel for improved imaging.

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Area of Science:

  • Gastroenterology
  • Medical Imaging
  • Endoscopy

Background:

  • No prior studies have used air as an enteral contrast medium for small bowel distension in virtual enteroscopy.
  • This research investigates the feasibility of air for this purpose.

Purpose of the Study:

  • To assess the feasibility of using air as an enteral contrast medium for virtual enteroscopy.
  • To evaluate small bowel expansion and visualization using air.

Main Methods:

  • Two volunteers and six patients underwent virtual enteroscopy with air insufflation.
  • A 16-detector row CT scanner was used with 2-mm slices; images were reconstructed using multi-planar reformation, volume rendering, and virtual endoscopy.
  • Findings were compared with double balloon enteroscopy and/or surgical specimens.

Main Results:

  • No complications were reported. Virtual enteroscopy clearly visualized jejunal and ileal folds.
  • Detected lesions included angiodysplasia, gastrointestinal stromal tumor, and arteriovenous malformation.
  • Inadequate distension prevented detection of one tumor; stenosis identification was challenging due to peristalsis.

Conclusions:

  • Air is a feasible enteral contrast material for virtual enteroscopy.
  • Air insufflation facilitates visualization of small bowel anatomy and pathology.