The average mammogram delivers more does than a full body CT scan. a) True b) Fa

Question

The average mammogram delivers more does than a full body CT scan. a) True b) False How many phenotype abnormalities would you expect to see in the offspring of a pregnant mouse that was irradiated with 2 Gy at day 16 of gestation? a) None b) Some short tails c) Many short tails and missing digits d) No missing digits but many short tails What single acute does would cause CNS ARS? a) 0.5 Gy b) 30 Gy c) 10 Gy d) 60 Gy The Therapeutic Ratio (index) can be improved by which of the following? a) A CT scan b) Decreasing the dote required to kill 50% of tumor cells c) Increasing the dose required to kill 50% of tumor cells d) Decreasing the dose required to kill 50% of surrounding healthy tissue cells Which of the following natural sources contribute to our annual background radiation exposure? a) Cosmic radiation b) Radon c) 40-Potassium d) All of the above

Explanation / Answer

46. False

47.

48. 30 Gy

49. (c) Increasing dose required to kill 50% of tumor cells

50. (d) all of the above

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