ACR Accreditation

American College of Radiology accreditation for imaging facilities. Required (or near-required, depending on payer) for CMS reimbursement of advanced imaging — CT, MRI, nuclear medicine, PET, PET / CT, PET / MR, breast MRI, ultrasound, DXA, mammography (paired with MQSA). The de facto accreditation framework in U.S. radiology and a major operating-cost driver for any advanced-imaging program.

How it works

Per-modality accreditation — separate program for each modality. CT and MRI accreditation are distinct, with their own image-quality standards, phantom imaging requirements, and personnel credentialing. A facility offering CT and MRI carries two separate accreditations.
Three-year cycle — accreditation cycles run three years, with periodic image-quality phantom submission, clinical-image submission, and physicist survey.
Image quality + dose + personnel credentialing — image quality assessed via phantom and submitted clinical images; dose reviewed against ACR practice parameters; personnel reviewed for qualifications and continuing education.
Designated lead interpreting physician + lead technologist + medical physicist named per modality.

Modalities accredited

CT — phantom (water, low-contrast, high-contrast resolution), CTDI dose, clinical-image submission across protocol categories.
MRI — phantom (geometric accuracy, slice thickness, low-contrast), clinical-image submission.
Ultrasound — phantom imaging optional in some programs; clinical-image submission across categories (general, vascular, OB / GYN, breast, MSK).
Nuclear Medicine — gamma-camera flood uniformity, intrinsic resolution, clinical-image submission.
PET — sensitivity, image uniformity, clinical-image submission.
PET / MR — combined PET and MR criteria; growing program.
Breast MRI — separate from mammography; clinical-image submission and CAD-bx workflow review.
DXA — phantom QC, clinical-image submission, ISCD-aligned standards.
Mammography — ACR is the dominant FDA-approved accrediting body for MQSA mammography accreditation.

Designated quality programs

ACR Dose Index Registry (DIR) — voluntary CT dose benchmarking; some payers and state regulators reference DIR participation.
National Radiology Data Registry (NRDR) — broader quality registry framework that includes DIR, lung-screening, mammography, and others.
Lung Cancer Screening Registry — required for low-dose-CT lung-screening reimbursement under CMS.

Why it matters to buyers

Lapsed accreditation = revenue cliff on Medicare advanced-imaging reimbursement. Many private payers tie reimbursement to ACR (or equivalent) accreditation as well.
New equipment installs require accreditation submission within a defined window after install — typically days to weeks for clinical-image submission depending on modality.
Software / detector upgrades sometimes trigger re-accreditation requirements — for major changes, not for routine service patches.
Physicist labor for the periodic survey is non-trivial; budget the day(s) of downtime plus physicist time per modality per cycle.
Refurb buys must include planning for accreditation transition — a used CT scanner moving from one practice to another doesn't carry over the seller's accreditation.

Adjacent / alternative bodies

IAC (Intersocietal Accreditation Commission) — accredits ultrasound, vascular, echo, nuclear cardiology, MRI, and other modalities; payer-recognized alternative to ACR for select modalities.
The Joint Commission — broader hospital accreditation, including imaging in the radiology service line.
State accrediting bodies — Arkansas, Iowa, Texas (mammography); some others state-specific.

MQSA (mammography, paired with ACR)
AAPM TG-142 (linac QA, distinct from ACR)
NRC (radioactive material, distinct framework)
State Radiation Registration
CT
MRI
PET / CT
Nuclear Medicine
Ultrasound
Mammography
Bone Densitometry
Chief Radiologist
Medical Physicist
Imaging Center Administrator