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Related Experiment Videos

Contrast-Enhanced CT colonography.

M M Morrin1, V Raptopoulos

  • 1Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA. mmorrin@caregroup.harvard.edu

Seminars in Ultrasound, CT, and MR
|October 23, 2001
PubMed
Summary
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Computed tomography (CT) colonography is an alternative for colorectal cancer screening. Intravenous contrast improves visualization of the bowel wall and enhances polyp detection accuracy.

Area of Science:

  • Radiology
  • Gastroenterology
  • Oncology

Background:

  • Computed tomography (CT) colonography offers a multiplanar and endoluminal view of the colon for colorectal cancer screening.
  • Limitations include inadequate bowel distention and poor preparation, hindering differentiation between stool and mucosal lesions like polyps.

Purpose of the Study:

  • To evaluate the utility of intravenous contrast material in improving bowel wall conspicuity and diagnostic accuracy in CT colonography.

Main Methods:

  • Intravenous contrast material was administered during CT colonography procedures.
  • Reader confidence and the ability to distinguish bowel abnormalities from luminal contents were assessed.

Main Results:

  • Intravenous contrast significantly enhanced bowel wall conspicuity and reader confidence.

Related Experiment Videos

  • Diagnostic accuracy for detecting medium and large polyps was improved with contrast administration.

    • Conclusions:

    • Intravenous contrast is a valuable adjunct to CT colonography, improving visualization and aiding in the detection of colorectal polyps.
    • This technique can potentially overcome some limitations of standard CT colonography for cancer screening.