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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. partial kidney shielding is best accomplished by means of_____

2. What is the mechanism of x-ray production in a kV x-ray unit

3. When an electron traverses a medium, the following events can occur:

4. All radiation workers have a radiotherapy department must have training and certification in_____

5. 125I sources are only used in______

6. To reduce the dose in the shielded region to less than 5% of the open field dose, the minimum shielding block thickness must be______

7. short half-life brachytherapy sources (half life of a few months) can be disposed of after storing them for the following number of half-lives:

8. in radiation therapy, failure of local control can occur due to_______

9. A DVH in integral form for OAR gives_____

10. for a pellet source of 103Pd or 125I imbedded in the tissue medium, the dose fall off over a short distance of 1 to 5 cm_____

11. in ASCII code each character's represented in_____

12. Clarkson's method is used for______

13. The AKS have a brachytherapy source is defined as_____

14. A patient is to be treated with an 8 MEV electron beam. A lead cut out is used inside the applicator to shape the field. what is the thickness of the cutout required to reduce the dose below the cutout region to less than 5% of the useful beam?

15. in a parallel opposed, equally weighted, the constant SSD field treatment, the dose at D-Max depth, due to each field, is_______

16. during treatment, with a planned field, a volume other than the CTV may get irradiated due to
internal motion of organs

17. The thickness of lead required for making a field block for a clinical photon beam is about 8 cm. If Cerrobend material is used, they require thickness would be______

18. fluid density on a CT image appears:

19. The annual effective dose limit to public, in case of continuous exposure, is_____

20. compared to portal radiography, what are advantages of electronic portal imaging?

21. What is the half-life of 60 Co

22. Acceptance tests are carried out on radiation therapy or brachytherapy equipment to ensure that the equipment conforms to_____

23. A full calibration of the beam must be carried out_____

24. electron back scatter from internal shielding:

25. skin dose is defined as the dose below the skin at a depth of______