Radiation Worker Exposure and Protection

Question 1

Cardinal principles of radiation protection

Answer 1

Time, Distance, Shielding

Question 2

The greater the distance, the ___ the dose

Answer 2

Lower

Question 3

A Lead apron bust be a minimum of ____ mm lead, but should be at least ____ mm of lead

Answer 3

0.25; 0.5

Question 4

Dose is governed by what Law

Answer 4

Inverse Square Law

Question 5

The use of high-speed image receptors may do what to scatter radiation and why?

Answer 5

The use of high speed image receptors may REDUCE scatter because of the DECREASED quantity of radiation needed for exposure.

Question 6

Example of primary protective barrier

Answer 6

Lead in Wall/floor where the primary beam may strike

Question 7

Example of secondary protective barrier

Answer 7

• The area of the wall extending from where primary protective barrier ends to the ceiling (wherever leakage/scatter radiation may strike)
• X-ray control booth

Question 8

Determinates of barrier thickness

Answer 8

Distance, Occupancy (uncontrolled[pts,nurses, etc] and controlled [x-ray techs, rads]), Workload, Use Factors

Question 9

Exposure equipment must have what type of switch?

Answer 9

Deadman

Question 10

Portable exposure switch cord must be how long?

Answer 10

6 feet

Question 11

Least amount of scatter is at what degree angle

Answer 11

90

Question 12

x-ray tube leakage cannot exceed ____ per hour at a distance of 1 meter.

Answer 12

100 mR