Radiation biology

Question 1

SI designations Roentgen (R

Answer 1

Coulombs per kilogram (C/kg)

Question 2

SI designations rad=

Answer 2

Gray (Gy): 1 Rad = .01 Gy; 1 Gy = 100 rad

Question 3

SI designations rem=

Answer 3

Seivert (Sv): 1 rem = .01 Sv; 1 Sv = 100 rem (this is the one that uses the quality factor
to multiply times the # Gy)

Question 4

SI designations Curie=

Answer 4

Becquerel

Question 5

Roentgen is the measurement of what?

Answer 5

ionization of dry air by an X-ray beam

Question 6

rad =?

Answer 6

radiation absorbed dose- Measures dose to a specific tissue

Question 7

rem =

Answer 7

radiation equivalent in man. X-rays have a quality factor of 1.

Question 8

1 Roentgen= 1 rad= 1 rem t/f

Answer 8

true

Question 9

Entrance skin exposure (ESE) doses are highest in what?

Answer 9

spinal radiography as compared to other plain film
studies.
o CT is much higher than plain film

Question 10

95% of cell damage is repaired within…

Answer 10

3 days if it is going to repair at all

Question 11

What is The Laws of Bergonie and Tribondeau?

Answer 11

Cell sensitivity depends on 
 Know how each is affected (i.e. lower age= higher radiosensitivity):
o Age 
o Differentiation 
o Mitotic rate 
o Metabolic rate

Question 12

Somatic effects of radiation:

Answer 12

Affecting the irradiated individual

Question 13

Stochastic is probabilistic and random t/f

Answer 13

true

Question 14

Stochastic effects can be either…

Answer 14

somatic or genetic…

Question 15

Probability of experiencing the Stochasticeffect is proportional to…

Answer 15

the exposure volume, but the severity of the effect is not really affected