Radiation protection

Question 1

Something you should avoid with hand washing

Answer 1

hand lotion

Question 2

According to the NCRP, the pregnant radiographer’s gestational dose-equivalent limit for a 1-month period is

Answer 2

.05 mSv

Question 3

linear dose–response curve Vs. Nonlinear

Answer 3

The linear dose–response curve has no threshold; that is, there is no dose below which radiation is absolutely safe. The nonlinear/sigmoidal dose–response curve has a threshold and is thought to be generally correct for most somatic effects

Question 4

Occupational radiation monitoring is required when it is likely that an individual will receive more than what fraction of the annual dose limit?

Answer 4

1/10

Question 5

Physical changes characteristic of gerontologic patients usually include

Answer 5

loss of bone calcium

Question 6

The NCRP recommends an annual effective occupational dose-equivalent limit of

Answer 6

5 rem (50 mSv)

Question 7

late effects of radiation

Answer 7

late, or long-term, effects must be considered. Individuals who receive small amounts of low-level radiation (such as those who are occupationally exposed) are concerned with the late effects of radiation exposure—effects that can occur many years after the initial exposure. Late effects of radiation exposure, such as carcinogenesis, are considered to be related to the linear nonthreshold dose–response curve. That is, there is no safe dose; theoretically, even one x-ray photon can induce a later response.