Practise Medical Dosimetry Certification Exam with a short sample and answer explanations. These are independent learning materials, not official exam questions or a pass prediction.

Exam outline and official sources

Medical Dosimetrist Certification Board (MDCB) · Verified as of 2026-10-13 against the current posted Applicant Handbook 2027, covering the January 21–23, 2027 examination. Its test specifications derive from the 2023 Job Task Analysis. MDCB announced the handbook posting for September 4, 2026; a separate blueprint implementation date is not stated. The workbook label 'Certified Dosimetrist (CMD)' maps to this examination and its awarded credential, Certified Medical Dosimetrist (CMD); the assigned slug is preserved.

This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.

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Medical Dosimetry Certification Exam

Start with 20 free questions, then review the explanations and any topics you missed.

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An organ has a contoured volume of 500 cm³. Its cumulative DVH shows that 125 cm³ receives at least 20 Gy. What is its relative V20?

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