The short answer
The American College of Radiology accredits imaging facilities across eight areas, including mammography, CT, MRI and radiation oncology. Accreditation involves review of real images by radiologists and medical physicists. You can search ACR's accredited facility list by ZIP code, city, state, facility name, modality and designation before you book a scan.
ACR accredits facilities in breast ultrasound, CT, mammography, MRI, nuclear medicine and PET, radiation oncology, stereotactic breast biopsy and ultrasound.
The review includes rigorous imaging analysis by qualified radiologists and medical physicists, not just paperwork.
You can search accredited facilities by ZIP or city, state, facility name, distance, modality and designation.
Some facilities carry extra designations, such as Diagnostic Imaging Center of Excellence, Comprehensive Breast Imaging Center, Lung Cancer Screening Center or Prostate Cancer MRI Center.
Choose how you want to understand this
The full explanation.
The sticker in the waiting room
You may have noticed a gold seal on the wall at an imaging center, or a line at the bottom of a letter about your mammogram. That is usually American College of Radiology accreditation.
It is easy to ignore. It is also one of the few pieces of quality information about a scan that you can look up yourself, in about two minutes, before you go.
What ACR accredits
ACR runs accreditation programs in eight areas:
- Breast ultrasound
- CT
- Mammography
- MRI
- Nuclear medicine and PET
- Radiation oncology
- Stereotactic breast biopsy
- Ultrasound
Notice that the list is by type of scan, not by hospital. This matters. A facility earns accreditation modality by modality. A center might be accredited for mammography and not for MRI, simply because it never applied for the second one.
So the useful question is not "is this place accredited." It is "is this place accredited for the scan I am having."
What the review involves
ACR describes the process in terms of expert eyes on real work. There are imaging reviews by imaging experts, involving rigorous imaging analysis by qualified radiologists and medical physicists. ACR also describes it as an objective assessment by peers that comes with continuous learning and improvement for staff, and says it keeps specialist staff in each modality to guide facilities through the process.
In other words, someone outside the building looked at actual images from that machine and judged whether they were good enough. That is a more meaningful check than a form.
The extra designations
Beyond basic accreditation, ACR offers additional designations you may see named.
The Diagnostic Imaging Center of Excellence is one. ACR says the logo demonstrates that a facility possesses the infrastructure, policies and procedures required to assure consistently high-quality care and service. There are tiers above it, including with Distinction and, at the top, Pinnacle, which ACR describes as also demonstrating excellence in outcomes across many advanced domains.
There are also focused designations that matter a great deal in cancer care specifically: Comprehensive Breast Imaging Centers, Lung Cancer Screening Centers, and Prostate Cancer MRI Centers.
If you are being sent for a prostate MRI or a lung screening CT, that last group is worth a look.
What ACR can do for you today
You can check, right now, before your appointment.
ACR runs an accredited facility search. You can search by ZIP or city, by state or territory, or by facility name. You can set a distance radius, filter by modality, and filter by designation. That means you can ask a genuinely practical question: which places within thirty miles of me are accredited for the scan my doctor ordered?
If your appointment is already booked somewhere and it does not appear, that is a reasonable thing to raise. Ask the scheduler which accreditations the facility holds. Sometimes the answer is simply that a different arm of the same health system holds it.
You can also use the search to plan. If you will need repeat scans for years, being at an accredited site with consistent equipment can make comparisons over time easier.
What ACR accreditation cannot promise you
Be clear-eyed here, because this is where people over-read a gold seal.
Accreditation does not promise that your particular scan will be read correctly. It speaks to the facility, its equipment, its physics oversight and its image quality. Interpreting your images is still a human judgment made by one radiologist on one day. That is exactly why outside second reads of films are a normal request and not an insult.
It does not promise a short wait, a kind technologist, a comfortable table or a bill you can afford.
It does not make a center a cancer treatment program. ACR accredits imaging and radiation oncology practice standards. Whether a hospital's overall cancer program meets multidisciplinary standards is a different accreditation entirely, run by the Commission on Cancer.
And a facility without ACR accreditation is not automatically bad. Some are accredited by other recognized bodies, and some simply have not applied. The absence of a seal is a question to ask, not a verdict.
Keeping it in proportion
Most people do not get to choose their imaging center. Insurance, geography and referral patterns decide it.
If you do have a choice, this is a fair way to make it. If you do not, spend your energy elsewhere: on making sure the right scan was ordered, on getting the images and report into your own hands afterward, and on asking who will read them. Those three things affect your care more than the sticker does.
Words to know
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Common questions
How do I find out if my imaging center is ACR accredited?
Use the accredited facility search on the ACR site. You can search by ZIP or city, by state or territory, or by facility name, and you can filter by distance, by modality and by designation.
Which kinds of scans does ACR accredit?
ACR lists eight areas: breast ultrasound, CT, mammography, MRI, nuclear medicine and PET, radiation oncology, stereotactic breast biopsy and ultrasound.
What does the review actually involve?
ACR describes imaging reviews by imaging experts, with rigorous imaging analysis by qualified radiologists and medical physicists, plus objective assessment by peers aimed at continuous improvement.
What is a Center of Excellence?
It is an additional designation. ACR says the Diagnostic Imaging Center of Excellence logo shows a facility has the infrastructure, policies and procedures required to assure consistently high-quality care and service. A Pinnacle facility is described as the highest tier.
My center is not accredited. Is that a red flag?
Not necessarily, and it is worth asking about rather than assuming. Ask which accreditations the facility holds and for which types of scans, and whether that affects your insurance coverage.
Does accreditation mean my scan will be read correctly?
No. It speaks to equipment, staffing and image quality standards at the facility. Reading an individual scan is still a human judgment, which is one reason second reads exist.
Is there a special designation for lung cancer screening?
ACR lists Lung Cancer Screening Centers among its special designations, along with Comprehensive Breast Imaging Centers and Prostate Cancer MRI Centers.
Questions to ask your doctor
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Sources last checked: 2026-09-03 what this meansLast updated: 2026-09-03Next planned review: 2027-09-03
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Editorial review complete — This page completed Cancer Explained's editorial checks (sources, safety, plain language, duplication). It has not been reviewed by a physician or other healthcare professional.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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