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About this exam

The ABR Diagnostic Medical Physics Initial Certification Exam is the examination pathway through which the American Board of Radiology certifies medical physicists practicing in diagnostic imaging. The ABR describes its mission as certifying "that our diplomates demonstrate the requisite knowledge, skill, and understanding of their disciplines to the benefit of patients," and lists Medical Physics among the disciplines for which it offers initial certification. This credential is intended for physicists who work in diagnostic radiology settings, including radiography, fluoroscopy, mammography, CT, and related modalities, and who need board certification to satisfy employer, accreditor, and regulatory expectations. Candidates should verify current eligibility, application deadlines, exam dates, delivery format, and scoring directly with the ABR, because the board publishes those details on its Get Certified, Exam Dates and Information, and Medical Physics pages rather than in a single static document. Preparation should combine a structured physics review with hands-on familiarity with clinical equipment and quality control procedures, since certification assessment emphasizes applied knowledge rather than recall alone. Working through practice problems, reviewing testing standards and acceptance-testing methods, and studying in the same domain groupings used for assessment is a reasonable approach. This page is an independent study resource and is not affiliated with, endorsed by, or sponsored by the American Board of Radiology.

What you'll study

Common questions

About ABR DMP preparation

What does this exam certify me for?

It is part of the ABR's Medical Physics initial certification pathway, which the board lists alongside Diagnostic Radiology, Interventional Radiology, Radiation Oncology, and Subspecialties. Certification indicates you have demonstrated the knowledge, skill, and understanding the ABR expects of a diagnostic medical physicist. Confirm the exact scope and any subspecialty options with the ABR directly.

How many questions are on the exam and how long is it?

The ABR does not publish a question count or time limit in the source material available for this page, so we do not state one. Treat any figure you see elsewhere as unverified unless it comes from the ABR's own Medical Physics or Exam Dates and Information pages. Check those pages before you plan your pacing strategy.

What score do I need to pass?

The passing standard is not published in the source material we can verify, so we do not quote a number or percentage. The ABR sets and communicates its own passing standards and reports results through its candidate systems. Consult the ABR's Medical Physics pages and your exam result notice for the authoritative standard that applies to your attempt.

How much does it cost and where do I register?

Fees and registration steps are not stated in the source material available here, so we do not list an amount. Registration runs through the ABR's own systems, reachable from its Get Certified and Exam Dates and Information pages. Always confirm the current fee schedule and deadlines on the ABR site before submitting payment or scheduling a test date.

If I fail, can I retake it, and how soon?

The ABR's retake policy is not described in the source material we can verify, so we do not state a waiting period or attempt limit. Retake rules, fees, and any eligibility conditions are set by the ABR and can change between exam cycles. Check the ABR's Medical Physics and policy pages, or contact the ABR, for the rules that apply to your situation.

How long is the certification valid?

Validity periods are not stated in the source material available for this page, so we do not give a number of years. The ABR separates initial certification from continuing certification, and its Stay Certified pages describe ongoing requirements. Review those pages to understand what maintaining your credential will involve after you pass.

Which topic should I study first?

Start with the area where your clinical experience is thinnest, not where you are most comfortable. Diagnostic radiological physics, nuclear medicine physics, radiation protection, imaging anatomy and physiology, and equipment and quality control all carry weight, so a weak domain costs as much as a strong one gains. Build a study plan that touches every domain weekly.

What are the most common ways candidates lose points?

Two patterns dominate: memorizing formulas without being able to apply them to a clinical scenario, and skipping the quality control and equipment material because it feels like technician work. Another frequent problem is studying only from notes rather than working through problems under time pressure. Practice applying concepts to unfamiliar setups, not just recalling definitions.

Do I need clinical experience to pass?

The exam assesses applied physics, so candidates who have performed acceptance testing, surveyed shielding, or run quality control programs generally recognize the scenarios more quickly. If your experience is narrow, supplement it with case-based study and walkthroughs of common tests. Confirm any formal experience requirements with the ABR, as eligibility rules are set there.

Is this page an official ABR resource?

No. This is an independent study resource and is not affiliated with, endorsed by, or sponsored by the American Board of Radiology. Use it for preparation only. For eligibility, applications, scheduling, fees, and official policies, rely exclusively on the ABR's own published pages and written communications to candidates.