Lecture 5

Question 1

dose 2 different ways

Answer 1

1) the measurement of how much radiation is deposited in a person when handling/ manipulating/ receiving radioactivity or received naturally as part of their environment
2) what we are going to be giving to a patient when a nuclear medicine study is ordered

Question 2

unit dose

Answer 2

radiopharmaceutical

Question 3

radiation dose

Answer 3

physical impact on the body

Question 4

units of energy transfer

Answer 4

activity
exposure
radiation dose
occupational dose

Question 5

transmission factors of ionizing radiation

Answer 5

distance
scattering
absorption

Question 6

activity

Answer 6

measure of the strength of a radioactive source
number of atoms that decay per second
do not indicate the deposition of energy

Question 7

interact with radiation

Answer 7

internal exposure secondary to accidental/ intentional ingestion adminstration
external exposure from being in proximity to radioactive material (limited)

Question 8

exposure

Answer 8

roentgen (r) and milliroentgen (mR) - measure of the production of ions in a given volume of air
early attempt to indicate energy disposition but does not provide a true representation (only applicable when discussing xray or gamma photons in the air)

Question 9

terrestrial radiation

Answer 9

soils and rocks
radon, building materials (concrete), and granite

Question 10

naturally occuring radiation

Answer 10

terrestrial, cosmic, man-made

Question 11

occupational exposure

Answer 11

monitoring radiation worker exposure is a requirement per the US nuclear regulatory commission
done via whole body badge and ring badge

Question 12

allowable exposures

Answer 12

whole body - 5000 mrem/year
extremities - 50,000 mrem/year

Question 13

specific gamma ray constant

Answer 13

used for unshielded sample
values are specific for each iostope

Question 14

calculating exposure rates

Answer 14

I = (mCi) L/ d^2