Lecture 3

Question 1

who has to wear a docimeter

Answer 1

anyone who is going to receive 1 mSv or 1/20 of the whole body limit to radiation workers

Question 2

what is the max dose limit for the public

whole body, eye, skin, hands, all other organs

Answer 2

whole body; 1
lens of the eye; 15
skin; 50
hands; 50
all other organs; 50

Question 3

whats the maximum annual dose limit for radiation workers

whole body, eye, skin, hands, all other organs

Answer 3

whole body; 20
lens for the eye; 20 averages over 5 years or 50 max a year
skin;500
hands;500
all other organs; 500

Question 4

what doses does dose reports include

Answer 4

current dose, cumulative year dose, cumulative life dose

Question 5

best principles of radiation protection of personnel

Answer 5

distance
time
shielding

Question 6

whats the best spot to stand for an x-ray procedure

Answer 6

3 meters away at 90 degrees from the x-ray tube

Question 7

types of shielding

Answer 7

lead walls and lead glass
gloves, arpons

Question 8

what are secondary barriers vs primary barriers

Answer 8

secondary barriers are walls that doesn’t ever get primary beam.

Question 9

Protective lead aprons must provide attenuation equivalent to at least

Answer 9

0.25 mm for 100 kV or less
0.35mm for greater than 100kV and less than 150 kV
0.5mm for greater than 150 kV

Question 10

how much lead must protective gloves have

Answer 10

0.25mm