100+ Free AOBR Radiology Practice Questions

Candidates must be DO or MD graduates of an accredited medical school, have completed (or be in the final year of) an accredited diagnostic radiology residency, hold an unrestricted state medical license, and have a program director attestation of satisfactory competence. Both the Written and Oral exams must be passed for primary certification. Candidates pursuing the Neuroradiology subspecialty certification require an additional ACGME-accredited fellowship.

The Written Exam is 5 hours of testing delivered in three 100-minute sections of 100 questions each (300 MCQs total). Part I includes approximately 50 physics and radiation safety questions; Part II includes approximately 250 image-rich diagnostic imaging questions across neuroradiology, vascular/interventional, cardiopulmonary, genitourinary, ultrasound, breast, gastrointestinal, musculoskeletal, pediatric, and nuclear medicine. It is administered at designated AOBR exam sites.

The AOBR Written Exam fee is $800 and the Oral Exam fee is $800, for a total of $1,600 for primary certification (2026 rates; confirm with AOBR). Re-examination fees are also $800. A late application surcharge of $240 applies to the Written if submitted after the first deadline. After certification, the annual Osteopathic Continuous Certification (OCC) fee is $300 due each December 31.

AOBR uses a scaled score system of 200-800 with a passing score of 500 or higher on both the Written and Oral exams. The standard is criterion-referenced rather than norm-referenced, so the passing scaled score corresponds to a fixed competency threshold rather than ranking against the cohort.

AOBR does not publish detailed annual first-attempt pass rates as routinely as the ABR. Available reports suggest first-attempt pass rates in the high 80s to low 90s percent range for residents from AOA-recognized programs. Repeat-candidate rates are markedly lower. A robust review course, dedicated case-based practice, and a high-volume question bank are essential to maximize first-attempt success.

Most candidates report 400-600 hours of dedicated prep beginning in R3 and intensifying through R4. A high-yield plan allocates ~15% to physics + radiation safety, ~70% to the core diagnostic areas (chest, GI, GU, MSK, neuro, breast, peds), ~10% to nuclear and IR basics, and ~5% to dedicated oral exam case prep. Daily image-based question practice (50-100 cases/day in the final 8-12 weeks) correlates with passing.

The AOBR is the AOA's osteopathic certifying board (administering Written + Oral exams at designated sites for DOs). The ABR is the allopathic boarding pathway and uses the Core (R3) + Certifying (R4 OLA-style) exams via Pearson VUE. Following the GME single accreditation system (2020), DOs in ACGME programs may pursue either ABR or AOBR certification (or both). The blueprints overlap significantly but the AOBR retains a 1% OPP/OMM component and uses Written/Oral format rather than Core/Certifying.

AOBR offers a Neuroradiology subspecialty Certificate of Added Qualifications ($900 exam fee), requiring completion of an ACGME-accredited neuroradiology fellowship in addition to primary diagnostic radiology certification. DOs pursuing interventional radiology, body imaging, pediatric radiology, breast imaging, or nuclear medicine subspecialty certification generally do so via the ABR or ABNM rather than AOBR, given the limited AOBR subspecialty CAQ portfolio.