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Medical Dosimetry Certification Prep Revision
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Medical Dosimetry Certification is a professional credential, primarily administered by the Medical Dosimetrist Certification Board (MDCB), that validates a practitioner's expertise in planning cancer radiation treatments. It requires passing a rigorous exam after completing an accredited education program, ensuring competency in dose calculations, treatment planning, and safety. Role of a Certified Medical Dosimetrist As part of the radiation oncology team (alongside doctors and physicists), they determine the best beam arrangements and radiation doses to destroy tumors while sparing... Show more
Medical Dosimetry Certification Prep Revision
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25 Questions

1. A wedge often functions as a_______

2. The output of a kV or a 60Co unit can be measured in terms of _____

3. low energy electrons are ______ scattered compared to high-energy electrons

4. A DVH in integral form for OAR gives_____

5. integrity of a teletherapy source can be checked by_____

6. The 60Co treatment room or an HDR brachytherapy room must have a zone monitor in order to_____

7. computer memory is volatile if it retains the data ____

8. The depth of the 80% iso dose line for a clinical electron beam of energy E(MeV) is approximately given by______

9. electrons have a _____ range in a medium

10. To minimize the beam divergence into the eye on the opposite side, when treating a brain through opposed lateral fields______

11. PDD increases with

12. DRRs can be compared with portfilms to ensure______

13. What is the SI unit to radioactivity

14. While reporting patient dose, the radiation oncologist must specify_____

15. The constancy of linac output, checked daily for photon and electron beams of at least one energy, when compared to the benchmark values established during commissioning, must be within_____

16. A colony of 100,000 cells was exposed to a certain dose of gamma rays resulting in a death of 50,000 cells. if a colony of 50,000 cells is exposed to the same dose, the number of cells killed will be about________

17. 10 MeV beams range in water

18. What is the recommended depth for accelerator photon beam calibration?

19. What is the gamma emission of the radio nuclide 192 Ir

20. The pencil electron beam coming out of a wave guide is spread into larger field sizes, in a clinical accelerator using:

21. A flattening filter is used in an accelerator to_____

22. x-ray spectrum produced is influenced by what?

23. The leakage exhibited by an ionization chamber measuring system could be due to_____

24. A cutout is used in a 20 cm by 20 cm applicator to treat a smaller cross-sectional area, using a 12 MEV electron beam. The output and depth dose will be significantly affected if the blocked field is less than_____

25. PTV-CTV margin is______

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