Lecture 9 Flashcards Preview

Radiation Safety And Biology > Lecture 9 > Flashcards

Flashcards in Lecture 9 Deck (12):
1

Occupational exposure for MIT?

0.1-0.2 average
(7.2-8.7mSv)

2

Occupational exposure for RT?

0.5-1.0 average
(1-37mSv)

3

Risk of fatal cancer

500 million/ 10mSv
MRT- 5-50 million

4

total detriment?

of fatal cancer  of heredity factors for ALL future generations  and an allowance for non fatal cancer

5

Why the difference between workers and the general population?

workers tend to be of reasonable health and in the prime age group (approx 20-60 years old)

6

Annual mortality risk?

100 deaths/ million

7

the risks of inducing fatal cancer are in the range of?

0.5 to 400 per million procedures for Medical imaging

8

radiation from examinations?

- the benefit of diagnosis  -the time to receive a similar quantity of radiation from background radiation at sea level

9

diagnostic radiology contributes

0.5 mSv of effective dose
2-3 million examinations annually

10

detriment of diagnostic radiology

500 fatal cancers
100 heritable effects induced per yr

11

Background radiation?

Cosmic rays 0.3 Radionuclides in soils 0.6 Radon progeny 0.2 Internal radionuclides 0.4 TOTAL 1.5

12

benefits of low dose radiation?

life lengthening growth more offspring