Radiation Protection and Safety Questions and Answers Flashcards
6 cards from real CAMRT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Radiation Protection and Safety Questions and Answers flashcards as text
According to CNSC regulations, what is the annual effective dose limit for radiation workers?
Answer: 50 mSv
The annual limit is 50 mSv with a 5-year cumulative limit of 100 mSv.
What is the inverse square law in radiation protection?
Answer: Intensity decreases with the square of distance; doubling distance reduces exposure to one-quarter
Doubling the distance reduces exposure to 25%.
A dosimeter was left on a sunlit windowsill over the weekend. What should the technologist do?
Answer: Report to the RSO, request replacement, note the incident for dose records
The incident must be reported so dose records can be annotated and a replacement issued.
What shielding material is most common for diagnostic X-ray protection?
Answer: Lead, due to its high atomic number and density
Lead (Z=82) provides strong photoelectric absorption of diagnostic-energy photons.
What is the purpose of the 10-day and 28-day rules for female patients?
Answer: Guide timing of non-urgent pelvic imaging to minimize irradiating an early pregnancy
These rules guide scheduling when pregnancy is least likely.
Which biological effects of radiation are most relevant in diagnostic imaging?
Answer: Stochastic effects (cancer and hereditary) are primary, as diagnostic doses are below deterministic thresholds
Stochastic effects have no threshold, making any dose carry some probability of effect.