Radiation Safety

Question 1

Collimnation controls the

Answer 1

Shape and size of primary beam

Question 2

Collimation restricts the size of the beam at the patients face to

Answer 2

2.75 in

Question 3

ALARA=

Answer 3

As low as reasonably achievable

Question 4

Filtration- added filtration does what

Answer 4

Aluminum disks added between the collimator and the tube head seal to get the filtration we need

Question 5

Total filtration:

____ mm aluminum for x rays machines

____ kvp

Answer 5

1.5

65

Question 6

Rectangle PID reduces exposure by up to ____% over round.

Answer 6

70

Question 7

Federal US Government standard was in what year

Answer 7

1974

Question 8

Lead apron needs how much lead

Answer 8

.25 mm of lead

Question 9

By using digital imaging it reduces radiation by

Answer 9

1/2

Question 10

Operator safety consists of

Answer 10

All patient protection measures 
Time
Shielding
Distance
Radiation monitoring

Question 11

How thick should the walls be?

Answer 11

2.5-3 inches or 1 mm lead or 3/16 of steel

Question 12

Rad workers are allowed how much exposure per year

Answer 12

.05 sv

Question 13

Maximum accumulated dose formula

Answer 13

(Age-18) x .05