CT colonography
noun
: a noninvasive medical imaging technique that uses computed tomography to visualize the interior of the colon and rectum especially to screen for polyps or cancerous growths
People putting off that colonoscopy just got some good news: Researchers at the University of Wisconsin School of Medicine have found that noninvasive CT colonography, which creates a 3D computer scan of the colon, can detect advanced polyps—the precursors to colorectal cancer—just as accurately.—
Matthew Shulman, U.S. News & World Report
Matthew Shulman, U.S. News & World Report
also
: a procedure utilizing CT colonography
Questionable findings revealed by stool testing, sigmoidoscopy or CT colonography should be confirmed by a colonoscopy. —The Washington Post
The Washington Post Other procedures, such as CT colonographies, don't pick up the flat polyps on the right side of the colon very well … —Amritha Alladi, The News-Star (Monroe, Louisiana)
Amritha Alladi, The News-Star (Monroe, Louisiana) Note: Both the technique and procedure are also called colonography and computed tomographic colonography.
Cite this Entry
“CT colonography.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/CT%20colonography. Accessed 4 Nov. 2025.
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