Radiobiology And Radiation Safety Flashcards Preview

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Flashcards in Radiobiology And Radiation Safety Deck (13)
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1

Radiobiology

The study of the effects of radiation on living organisms

2

Electromagnetic radiation

Combination of electric magnetic fields that travel together
Wave and particulate properties
Non-ionizing and ionizing forms

3

Types of ionizing radiatio

Alpha particles
Beta particles
X-rays and gamma rays

4

Alpha particles

Helium nucleus
Large, collide with matter and lose energy quickly

5

Beta particles

Electrons emitted form radioactive elements

6

X-rays and gamma rays

Identical except X-rays produced outside the nucleus

7

Stochastic radiation effect on organism

Severity independent of dose
Probability increases with doe
No threshold (all or none phenomenon)

8

Deterministic radiation effect on organisms

Severity increase with dose
Threshold

9

ALARA

As low as reasonable achievable

10

Intensity of X-Ray energy is inversely related to

Distance from point source squared

11

Stay at leas __ feet away from source

6

12

Lead clothing protects from

Scatter not primary beam
5 mm Pb equivalent

13

NCRP/ state rules

Individuals under 18 are not allowed in radiology suite
NRCP limits