Radiation safety; Personnel Protection

Question 1

cardinal rules of radiation protection

Answer 1

1. Time
2. Distance
3. Shielding

Question 2

Primary radiation

Answer 2

Primary beam: The X ray beam prior to any interaction with the patient, grid, table or II
Exit beam: The beam that interacts with the defector is termed the exit beam and will have been significantly attenuated

Question 3

Secondary radiation

Answer 3

Scattered radiation: this is a direct result of the Compton effect in the patient and contributes the most to staff radiation dose.
Leakage radiation: this is the leakage from the x-ray tube housing. Limited to a maximum 1 mg/ hr at 1 meter

Question 4

what is the source of radiation exposure to the radiographer?

Answer 4

scatter radiation, produced by Compton interactions in the patient 

Question 5

Greasiest exposure to the radiographer occurs during

Answer 5

fluoro
portables
OR

Question 6

what is the area of least scatter

Answer 6

at a 90 degree angle from the patient

Question 7

if you increase KVP, what will happen to scatter?


Answer 7

scatter will increase

Question 8

if you increase FOV, (larger Lightfield) what will happen to scatter?

Answer 8

increase

Question 9

if you increase collimation, (smaller field size) what will happen to scatter

Answer 9

decrease

Question 10

if you increase patient size, what will happen to scatter?


Answer 10

increase

Question 11

NCRP #102

Answer 11

specifies shielding requirements

Question 12

aprons

Answer 12

0.5 mm Pb

Question 13

thyroid shields

Answer 13

0.50 mm Pb

Question 14

Glasses

Answer 14

0.35 mm Pb

Question 15

gloves

Answer 15

0.25 mm Pb

Question 16

Protective curtain

Answer 16

0.25 mm Pb

Question 17

Bucky slot cover

Answer 17

0.25 mm Pb

Question 18

primary barrier shielding

Answer 18

-primary team is directed to the wall behind the wall Bucky in the floor below the table Bucky
-1/16 inch of lead
- 7 feet tall

Question 19

secondary barrier for shielding

Answer 19

-Doors to x-ray room x-ray control Booth -located wherever leakage or scatter radiation may strike
-wherever the primary beam won’t be directed
1/32 inch of lead

Question 20

controlled areas

Answer 20

require less shielding, because the technologists are being monitored by a dosimeter