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.
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.
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.
A privacy-preserving large language model detected 99.8% of extraspinal findings on MRI spine reports, with 96.3% accuracy in referral decisions and near-perfect agreement (κ=0.959) with the reference standard.
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.