C-RADS
CT Colonography Reporting and Data System
C-RADS standardizes reporting of CT colonography, with separate tracks for colorectal findings and for the extracolonic findings that inevitably turn up on an abdominal-pelvic scan. It sorts each into categories that map to a clear next step, keeping communication with referring physicians consistent and supporting quality metrics across screening programs. The 2023 update reflects nearly two decades of experience: it adds a subcategory (C2b) for mass-like diverticular strictures that are likely benign, and simplifies the extracolonic scheme by merging the E1 and E2 categories. It functions as a quality-assurance backbone rather than a risk-only score.
Version history & what changed
- C-RADS version 20232023Current
Nearly two decades of experience distilled: adds a C2b subcategory for mass-like diverticular strictures likely to be benign, and simplifies the extracolonic scheme by merging the E1 and E2 categories.
- Original C-RADS2005
Established dual-track reporting — colorectal plus extracolonic findings — with categories mapping to a clear next step, as a quality-assurance backbone for CT colonography screening.
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Resources & links
- officialACR C-RADS official page
RadPigeon is an independent radiology news digest and is not affiliated with or endorsed by American College of Radiology (ACR). “C-RADS” is a trademark of its owner and is named here only to refer to the system. Always consult the official source for the exact, current criteria.