Medical Dosimetrist (CMD) Practice Test

The Medical Dosimetrist (CMD) Practice Test is a free intermediate-level, 20-minute skill test from Science of Apps. It tests medical dosimetry knowledge for the CMD exam — radiation physics and interactions, treatment machines and beam data, simulation, imaging and target and organ volumes, treatment planning techniques and dose calculation, and plan evaluation, QA, safety and radiation protection — written to AAPM task group reports, ICRU volume definitions, NRC radiation protection rules and MDCB certification guidance for 2026. Supports study; follow clinical protocols. Score 70% or more on its 20 questions to earn a verifiable Dosimetrist Proficiency certificate (SOA-D7). Every question is based on published standards and research — including ICRU reports on prescribing, recording and reporting radiotherapy (GTV, CTV, PTV) (International Commission on Radiation Units and Measurements), AAPM Task Group 142: Quality assurance of medical accelerators (American Association of Physicists in Medicine), Radiation protection basics (ALARA, time, distance, shielding) (U.S. Nuclear Regulatory Commission) — and each answer is explained with its source.

Science of Apps offers a free Medical Dosimetrist (CMD) Practice Test, updated for 2026 and 2027. It measures radiation physics, machines and beam data, simulation, volumes and planning and evaluation, QA and safety and gives instant results with a shareable certificate.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Dosimetrist Proficiency certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: ICRU reports on prescribing, recording and reporting radiotherapy (GTV, CTV, PTV) (International Commission on Radiation Units and Measurements); AAPM Task Group 142: Quality assurance of medical accelerators (American Association of Physicists in Medicine); Radiation protection basics (ALARA, time, distance, shielding) (U.S. Nuclear Regulatory Commission). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Radiation Physics (Interactions, Units and Decay); Machines and Beam Data (Linacs, Collimation and Commissioning); Simulation, Volumes and Planning (Simulation, Volumes and Techniques); Evaluation, QA and Safety (DVH, QA and Protection). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Medical dosimetrist, Radiation therapist moving into dosimetry, Medical physics assistant, Dosimetry student and Radiation oncology team member. It suits anyone who wants a quick, verifiable way to show Medical Dosimetrist knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

A medical dosimetrist designs radiation treatment plans. Working with the radiation oncologist and medical physicist, they use a treatment planning system to shape dose to the tumour while sparing normal tissue, and help with simulation, calculations and quality checks.

The Certified Medical Dosimetrist (CMD) credential is awarded by the Medical Dosimetrist Certification Board (MDCB). It validates the knowledge and skills needed to plan radiation treatments safely and accurately.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.