Lecture 9 Flashcards Preview

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Flashcards in Lecture 9 Deck (12)
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1
Q

Occupational exposure for MIT?

A
  1. 1-0.2 average

7. 2-8.7mSv

2
Q

Occupational exposure for RT?

A

0.5-1.0 average

1-37mSv

3
Q

Risk of fatal cancer

A

500 million/ 10mSv

MRT- 5-50 million

4
Q

total detriment?

A

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

5
Q

Why the difference between workers and the general population?

A

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

6
Q

Annual mortality risk?

A

100 deaths/ million

7
Q

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

A

0.5 to 400 per million procedures for Medical imaging

8
Q

radiation from examinations?

A
  • the benefit of diagnosis  -the time to receive a similar quantity of radiation from background radiation at sea level
9
Q

diagnostic radiology contributes

A

0.5 mSv of effective dose

2-3 million examinations annually

10
Q

detriment of diagnostic radiology

A

500 fatal cancers

100 heritable effects induced per yr

11
Q

Background radiation?

A

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

12
Q

benefits of low dose radiation?

A

life lengthening growth more offspring