RBP L3 - Risks in Radiology, RT & NM

Question 1

What is the annual limit for radiation workers per year?

Answer 1

20mSv + background

Question 2

What is the annual limit for non-radiation/public?

Answer 2

1mSv - same as RMIT students + background

Question 3

Dose limit workers: It is possible to average a worker’s dose. How many years and each year, how much should it NOT exceed?

Answer 3

Average over 5 years, each year should not exceed 50mSv

Question 4

How much dose does a radiation worker actually get per year? What is the limit

Answer 4

The limit is 20mSv, however we usually max get 2mSv

Question 5

What is the dose limit for lens of the eye (worker vs public)

Answer 5

Worker is 20mSv, public is 1mSv

Question 6

What is the dose limit for skin (Worker vs public)

Answer 6

Worker is 500mSv, Public is 50mSv

Question 7

An adult receiving an effective dose of 1000 microSv will have additional lifetime risk of radiation induced cancer of 1 in 20k

Answer 7

True

Question 8

CT head with a dose of 2200microsV adds risk of 1 in 9000 of developing fatal cancer

Answer 8

True

Question 9

TI-201 cardiac adds 1 in 1 in 1000

Answer 9

True

Question 10

Less than how much eV would be considered non-ionising?

Answer 10

12eV

Question 11

What are the eV for UVA, UVB and UVC?

Answer 11

UVA: 3.10
UVB: 3.94
UVC: 4.43