CT Colonography Registry

The CTC registry provides evidence-based health outcomes and process data for decision-making purposes. The registry allows facilities to compare results to regional and national benchmarks for quality improvement.

Process measures include optimal bowel cleansing and distention, rate of adequacy of diagnostic CTC examination and rate of adequacy of screening CTC examination. Outcome measures include rate of colonic perforation, true positive rate and extracolonic findings.

Participating facilities and physicians receive semiannual reports based on aggregated benchmarks to facilitate patient safety and quality improvement efforts.

The CTC registry offers participants additional ways to fulfill reporting requirements for the Merit-based Incentive Payment System (MIPS). Participation also allows credit for Maintenance of Certification (MOC) Part IV requirements of the American Board of Radiology (ABR).

How to Participate

  • Register each facility that will participate in the registry
  • Complete and return a signed participation agreement to NRDR
  • Fees are due only after you have started submitting your CTC data
Follow our registration process to get started. Already a NRDR participant? Add the CTC registry to your facility registration.

Consult our CTC data submission overview for more information about submitting data to the registry.
Log In to NRDR

Need assistance?  Visit our help desk

1-800-227-5463 x3535

How to Submit Data


Designate a staff person to collect and enter data using our online forms.

Core Documents