In a CT scan, a radiologist uses X-ray images taken from outside the abdomen to spot polyps. If the scan reveals polyps that should be removed, the patient then undergoes a colonoscopy.

Of 48 worrisome polyps at least 1 centimeter in diameter, 45 turned up in the CT scans and 42 were detected by the colonoscopy. Between them, the tests turned up 554 polyps deemed to have ...

“The scans are about 85% as sensitive as a colonoscopy in this group, which is very good,” he says. “But the sensitivity of any test drops once you start doing it in normal, healthy people.

By Dennis Thompson HealthDay ReporterFRIDAY, June 13, 2025 (HealthDay News) — CT scans might be able to prevent more colon cancers than stool DNA tests, a new study says.

A normal coronary calcium, especially in combination with a normal stress test, makes significant blockages in the artery very unlikely. All X-rays and CT scans use radiation. However, the amount ...

CT scan radiation is expected to cause about 103,000 future cancers among the 61.5 million people who received a CT in 2023, researchers reported April 14 in JAMA Internal Medicine.

CT screening also was more cost-effective than stool testing FRIDAY, June 13, 2025 (HealthDay News) — CT scans might be able to prevent more colon cancers than stool DNA tests, a new study says.

FRIDAY, June 13, 2025 (HealthDay News) — CT scans might be able to prevent more colon cancers than stool DNA tests, a new study says. CT colonography performed every three to five years could ...

Key Takeaways Colon CT scans might be able to prevent more colon cancers than stool DNA testingTwo CT screening approaches outperformed stool DNA testing in computer modelsCT screening also was ...