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The National Radiology Data Registry is a data warehouse for the registries listed below. The primary purpose of NRDR is to aid facilities with their quality improvement programs and efforts to improve patient care by comparing facility data to that of their region and the nation. A practice or facility may choose to participate in any or all registries as appropriate for their practice. When a facility joins more than one registry, the warehouse allows information to be shared across registries within the facility.
Quality Improvement Registries
The CT Colonography Registry collects measures critical to evaluating CT colonography procedures. Data collected in this registry will contribute to the evaluation of colonography as an alternative to colonoscopy.
The Dose Index Registry (DIR) allows facilities to compare their CT dose indices to regional and national values. Institutions receive periodic feedback reports comparing their results by body part and exam type to aggregate results. This data will be used to establish national benchmarks for CT dose indices.
The General Radiology Improvement Database (GRID) collects information about imaging facilities which is then aggregated to establish benchmarks for quality improvement. It allows facilities and physicians to compare turnaround times, patient wait times, patient satisfaction and many other process and outcome measures with other facilities and practices of similar size and type. For physicians participating in CMS’s Physician Quality Reporting Initiative, GRID provides a means of comparing results of the various imaging measures included in the initiative.
The ACR Lung Cancer Screening Registry (LCSR) is designed to systematically audit the quality of interpretation of screening lung CT exams. The registry is based on the ACR Lung Imaging Reporting and Data System (Lung-RADS), which is the product of the ACR Lung Cancer Screening Committee subgroup on Lung-RADS. This Lung-RADS system is a quality assurance tool designed to standardize lung cancer screening CT reporting and management recommendations, reduce confusion in lung cancer screening CT interpretations and facilitate outcome monitoring. The ACR LCSR will capture Lung-RADS recommendations and monitor and compare appropriate use of Lung-RADS.
The ACR National Radiology Data Registry (NRDR) has been approved as a Qualified Clinical Data Registry (QCDR) for the CMS Merit-Based Incentive Payment System (MIPS). Radiologists may use the NRDR QCDR to meet MIPS participation requirements. By using the QCDR to participate in the MIPS program, radiologists can avoid a negative payment adjustment for not reporting and potentially earn an incentive. ACR will submit physician and/or group practice quality measure data, improvement activities and advancing care information measure data to CMS. For more information visit
The National Mammography Database (NMD) leverages data that radiology practices are already collecting under federal mandate by providing them with comparative information for national and regional benchmarking. Participants receive semi-annual feedback reports that include important benchmark data such as true positive rates, positive predictive value rates and recall rates.
3D Printing
The 3D Printing Registry collects anonymized 3D printing case information, in order to address questions about the clinical indications and intended uses for printed models, the source imaging, the model construction techniques and effort, the 3D printing techniques and effort, and the clinical impact of the models.
Pilot and Research Registries
The ACR and NRDR continually look for additional areas where a clinical quality registry would support quality improvement efforts in radiology and improved patient care. When new topics or focus areas are identified, we pilot test the concepts, processes and functionality required with a small number of test sites before opening a new registry for general participation. However, you may see the pilot registries in the NRDR applications page, and while participation is limited, you may contact us for more information at
The Assess-AI Registry provides monitoring of artificial intelligence (AI) algorithm performance in clinical practice by capturing real-world data during clinical use. Assess-AI collects the output of the AI algorithm, the final result from the radiologist at the point of care, and metadata about the exam.
The CDS Radiology Support, Communication and Alignment Network Registry (CDSR) is the newest registry under the umbrella of the American College of Radiology’s National Radiology Data Registry. The CDSR provides access to a subset of a facility’s imaging clinical decision support (CDS) data. Currently, participation is available for facilities that have CareSelect™ Imaging/ACR Select provided by the National Decision Support Company (NDSC).
The LI-RADS Registry is a pilot project to create an infrastructure for radiology reporting registries that can eventually include all of the –RADS, incident findings, and other ACR clinical guidance.

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