The AI study tool for the American Board of Radiology.
Built for medical physicists and radiation oncologists. Ask any ABR topic, get a 5-part study session: teach-from-zero concept → ABR expectations → practice problem → graded feedback → saved to your library.
Every session calls Claude Opus 4.7 — the most capable model — through long, citation-grounded prompts.
Concept → ABR expectations → practice problem → graded feedback → saved to your library.
Every problem calibrated to the exam you selected. No generic multiple-choice filler.
Medical Physicist (Parts 1, 2T, 2D, 2NM, 3) and Radiation Oncologist (Physics portion).
Yes, it costs more than a chatbot.
Every Nucleus session calls the most capable model available — with the depth needed to teach a board concept properly. Long, calibrated, citation-grounded explanations. ABR-grade accuracy. We won’t dilute the model to make it cheap.
Nucleus is a Radiation Physics study tool for medical physicists and radiation oncologists preparing for the ABR. Every session — explanation, practice problem, feedback — is calibrated to the exact ABR exam you’re sitting for, against the official ABR content guides.
No credit card · 3 free sessions · Cancel anytime
Calibrated against the official ABR content guides
How it works
You ask. Nucleus explains. You answer. It grades. Everything saves to your library for review.
Half-value layer. TG-51. Brachytherapy dose calc. Anything in your exam.
Calibrated to your selected exam — depth, math expectation, and tone all match the real test.
Per-exam calibration is hard-coded, not AI-guessed.
An ABR-style multiple-choice question written in your exam's actual format.
Right? See why. Wrong? See the misconception, the right reasoning, and what to remember.
Every session indexed, searchable, ready for review the night before test day.
Exams covered
Six separate exam blueprints. Each one calibrated to its specific ABR content guide — depth, tone, math expectation, and question style all change per exam.
Medical Physicist
Radiation Oncologist
A Rad Onc resident asking about TG-51 gets a clinical-context explanation — not the calculation-heavy physicist version. Different audience, different content.
Why Nucleus
Most AI study tools give the same answer to a Part 1 candidate and a Rad Onc resident. We don’t.
Every blueprint is built from the actual ABR content guide for that exam. No guessing what the test covers.
A graduate student gets derivations and worked math. A clinician gets clinical context and decision-making.
Per-exam section structure is hard-coded, not left to the model. The same topic produces different teaching artifacts per exam.
Built by a resident
Hi, I’m Edgar J. Garcia-Martinez. I built Nucleus because I needed it. I passed ABR Part 1 on my first attempt, and along the way I built exactly the kind of study tool I’m offering you now — one that meets the exam where it actually lives, not where a generic AI thinks it lives.
Nucleus exists to help my fellow medical physics community — and the radiation oncology community — get a tool that’s genuinely calibrated to ABR Radiation Physics. Every blueprint, every section structure, every practice-problem style was tuned against the official ABR content guide and refined against what worked for me on the actual exam.
Currently
Resident, Loma Linda University Medical Center
Loma Linda, CA
Education
M.S. Medical Physics, SDSU
B.S. Applied Physics, CSUSM
Pricing
Three free sessions on signup. Subscribe to keep going.
Nucleus Monthly
30 study sessions / month. Cancel anytime.
No credit card required for free sessions
Built by VENDRA LABS for the medical physicists and radiation oncologists who’d rather know the material than memorize tricks.
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