RAD BIO QUIZ 1

Question 1

Which unit of measurement is standard for use?

Answer 1

SI-Systeme International

Question 2

Amount of radiation in the primary beam. (x-ray tube output)

Answer 2

Exposure

Question 3

How do we measure exposure?

Answer 3

Coulomb per Kilogram

Question 4

Energy per unit mass absorbed by an irradiated object.

Answer 4

Absorbed dose

Question 5

What is the measurment for absorbed dose?

Answer 5

Gray(Gy). 1J/kg
1 Joule = 1 Gy

Question 6

What is the Dose equivalent?

Answer 6

Absorbed dose x radiation weighting factor

Question 7

What is the radiation weighting factors?

Answer 7

Xray, Gamma, Beta and positron=1
Proton=2
Alpha particles=20

Question 8

The sum of the equivalent doses for all irradiated tissues.

Answer 8

Effective Dose

Question 9

What considers the type of radiation and the sensitivity of the tissues?

Answer 9

Effective Dose

Question 10

Absorbed dose x radiation weighting factor x tissue weighting factor

Answer 10

Effective Dose

Question 11

Tissue Weighting Factors:

Answer 11

Gonads- .20
Red Bone Marrow- .12
Colon- .12
Liver- .05
Skin- 0.01

Question 12

In which unit is Effective Dose measured?

Answer 12

Siverts (Sv)

Question 13

Kinetic energy of the primary beam

Answer 13

AIR KERMA.
only used for photons- (XRAY AND GAMMA)

Question 14

What does KERMA stand for?

Answer 14

Kinetic Energy Released in MAtter

Question 15

How is Air Kerma measured?

Answer 15

Gray (Gy)

Question 16

Takes into account the area being irradiated.

Answer 16

Dose Area Product (DAP)

Question 17

How is DAP measured?

Answer 17

DAP meter

Question 18

What is the formula for DAP?

Answer 18

absorbed dose x irradiated (Collimated Area)

Question 19

The time required for radioactivity rate to reduce to 1/2 its original measurement. Specific to radioisotope and constant.

Answer 19

Half-Life

Question 20

Sum of all absorbed doses in an exam
ex: 3 view lumbar

Answer 20

Integral Dose

Question 21

What is considered Background Radiation?

Answer 21

Natural (radon)
Manmade (consumer products) highest in tightly sealed structures such as granite or marble

Question 22

How much background radiation on average does a person receive per year?

Answer 22

3 mSv

Question 23

What are the types of Dosimeters?

Answer 23

OSLD
TLD
FILM BADGE
POCKET/ ION CHAMBER

Question 24

Which dosimeter has dose released by light?

Answer 24

OSL- optically stimulated luminescence dosimeter

Question 25

In which dosimeter is the dose released by heat?

Answer 25

TLD- thermoluminescent

Question 26

Which dosimeter has a small piece of film with a foil filter?

Answer 26

Film badge

Question 27

Which dosimeter can determine what type of radiation received?

Answer 27

Film badge

Question 28

Which dosimeter provides real-time dose readings using an anode pin or plate?

Answer 28

Pocket/ ion chamber

Question 29

What is the occupational dose limit per year?

Answer 29

50 msv

Question 30

Which modality receives the highest occupational dose per year?

Answer 30

Fluoroscopy/ IR

Question 31

What is the public dose limit?

Answer 31

1mSv

Question 32

What is the fetal dose limit per month?

Answer 32

0.5mSv

Question 33

What is the dose limit for the lens of your eye?

Answer 33

150 mSv

Question 34

What is the dose limit for "everything else" ex: elbow, knee cap

Answer 34

500 mSv

Question 35

The amount of energy deposited in tissue per unit path length of radiations travel

Answer 35

Linear Energy Transfer (LET)

Question 36

What has a high LET?

Answer 36

Alpha particles

Question 37

what has a low LET?

Answer 37

XRAYS GAMMA (LOWEST)

Question 38

If the energy deposited into the tissue is more concentrated and therefore harmful, is this a high or Low LET?

Answer 38

HIGH

Question 39

Relative Biological Effectiveness (RBE)

Answer 39

Comparison of different types of radiation. ex: x-ray and alpha particles

Question 40

If one type of radiation can cause the same effect as other with a lower amount, does it have a higher or lower RBE?

Answer 40

Higher RBE

Question 41

Graphic representation of the degree of a biological response to increasing doses of ionizing radiation.

Answer 41

Radiation Response Curves

Question 42

How many millisieverts is in one Sv?

Answer 42

1000