Comparison of Barium Enema, Computed Tomographic Colonography, and Colonoscopy in Detecting Colon Cancer

2014-08-27 03:56:55 | BioPortfolio


RATIONALE: Screening tests may help doctors detect cancer cells early and plan more effective treatment for cancer. New diagnostic procedures such as computed tomographic colonography may provide a less invasive method of identifying patients who have colon cancer.

PURPOSE: Diagnostic and screening trial to compare the effectiveness of barium enema, computed tomographic colonography, and colonoscopy in detecting of colon cancer.



- Compare the accuracy of air contrast barium enema, computed tomographic colonography (virtual colonoscopy), and colonoscopy for the detection of colonic lesions in patients with factors related to colon cancer.

- Compare the patient experience during each of these imaging tests.

OUTLINE: This is a multicenter study.

A repeat fecal occult blood test is performed. Patients then undergo an air contrast barium enema (ACBE). At 7-10 days after ACBE, patients undergo a computed tomographic colonography (virtual colonoscopy) followed by a colonoscopy on the same day.

A repeat ACBE may be performed if there is a discrepancy between the initial ACBE and colonoscopy. If the repeat ACBE continues to show an abnormality, patients undergo a second colonoscopy.

Within 24 hours of completion of each test, patients fill out a questionnaire about their experience. At 5-7 days after completion of all tests, patients complete a final questionnaire comparing all 3 tests.

PROJECTED ACCRUAL: A total of 2,133 patients will be accrued for this study within 4 years.

Study Design

Primary Purpose: Diagnostic


Colorectal Cancer


screening questionnaire administration, barium enema injection, computed tomography, computed tomography colonography, diagnostic colonoscopy, screening colonoscopy


Rebecca and John Moores UCSD Cancer Center
La Jolla
United States


Active, not recruiting


National Cancer Institute (NCI)

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:56:55-0400

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Medical and Biotech [MESH] Definitions

X-RAY examination of LOWER GASTROINTESTINAL TRACT. Imaging is done while a BARIUM COMPOUND (e.g., BARIUM SULFATE) fills the large intestine via the rectum as a CONTRAST MATERIAL.

An imaging technique using a device which combines TOMOGRAPHY, EMISSION-COMPUTED, SINGLE-PHOTON and TOMOGRAPHY, X-RAY COMPUTED in the same session.

Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.

Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.

Tomography using x-ray transmission and a computer algorithm to reconstruct the image.

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