Radiation Protection

Question 1

The principles of radiation protection and safety on which the safety standards are based are those developed by the ____. CONDUCTS research

Answer 1

International commission on Radiological Protection (ICRP) - NO legal power

Question 2

FORMULATES AND PUBLISHES scientifically researched recommendations on radiation protection and measurements

Answer 2

National Council on Radiation Protection and Measurements

Question 3

Enforces radiation protection standards relating to radioactive material at the federal level

Answer 3

Nuclear Regulatory Commision (NRC)

Question 4

Annual effective dose limit

Answer 4

Occupational exposure - 50mSv

Question 5

Cumulative effective dose

Answer 5

Age (in years) x 10mSv

Question 6

General public annual effective dose limit for FREQUENT exposure

Answer 6

1mSv

Question 7

General public annual effective dose limit for INFREQUENT exposure

Answer 7

5mSv

Question 8

Exposure
Embryo-fetus
For gestation
Per month

Answer 8

5mSv
0.5mSv

Question 9

ALARA

Answer 9

As Low As Reasonably Achievable

Question 10

Collimator that automatically restrict the beam to the size of the image receptor

Answer 10

Positive Beam Limitation(PBL)/Automatic collimation

Question 11

Metal cylinders that attach to the bottom of the collimator. Used to restrict the beam tightly to a small circle

Answer 11

Cylinder cones

Question 12

Flat piecenof lead with a circle or square opening in the middle. Placed as close to the xray tube window as possible

Answer 12

Aperture diaphragm

Question 13

Beam limitations materials

Answer 13

Collimator
Cylindrical cone
Aperture diaphragm

Question 14

Reduction by gonadal shields

Female

Male

Answer 14

50%

95%

Question 15

Flat piece of lead or a lead apron placed over the gonads

Answer 15

Flat contact shield

Question 16

Suspended from the xray tube housing and placed in the xray beam light field

Answer 16

Shadow field

Question 17

Increased risk for fetal doses

Answer 17

> 15 rad

Question 18

Most effective protection from ionizing radiation

Answer 18

Distance

Question 19

Lead apron

Thyroid shield during flouroscopy

Answer 19

At least 0.25mm (recommended 0.5mm)

0.5 mm

Question 20

Occupancy

Answer 20

1-office
1/5-corridors, lounges
1/20-restroom/storage area

Question 21

Areas where personnel are not provided radiation exposure monitors or radiation safetuly training

Answer 21

Uncontrolled area

Question 22

Occupied by persons trained irradiation safety and wearing personnel monitoring devices

Answer 22

Controlled area

Question 23

Annual equivalent dose limit for deterministic effects
Lens -
Localized skin, hands and feet

Answer 23

150
500

Question 24

Consistent of 1/16 inch lead equivalent

Answer 24

Primary protective barrier

Question 25

Consist of 1/32 inch lead equivalent

Answer 25

Secondary protective barriers

Question 26

Minimum for
Protective curtain
Bucky slot shield

Answer 26

0.25 mm lead equivalent
0.25 mm lead equivalent

Question 27

Use aluminum oxide to record dose
Radiation absorbed causes electrons to be trapped
Sensitive to exposures of 1mrem
3 months at a time

Answer 27

Optically stimulated luminwscence dosimeter (OSL)

Question 28

Use lithium flouride crystals
Excited by radiation exposure and release this energy on heating
Sensitive to exposures of 5mrem
Can be worn for longer periods

Answer 28

Thermoluminescent dosimeters

Question 29

Sensitive to 10mrem
Sensitive to extreme temperature and humidity
Developed monthly

Answer 29

Film badges