Deck 6: Patient Protection

Question 1

Scatter radiation is a form of:

A)primary radiation
B)secondary radiation
C)both a and b
D)none of the above

Answer 1

secondary radiation

Question 2

Mechanical timers are usually inaccurate by at least a _________ second.

Answer 2

Question 3

Presently the maximum permissible dose (MPD)for dental workers with ionizing radiation is _______________.

Answer 3

5000 mrem/year

Question 4

The use of pointed PIDs is prohibited because their use results in:

A)cone cutting
B)increased primary radiation
C)increased scatter radiation
D)greater likelihood of overlapping images

Question 5

The removal of the long wavelength, low energy x-ray photons from the beam is the job of the:

A)collimator
B)filters
C)insulating oil
D)open-ended cone

Question 6

To get the diagnostic benefits from radiographs, optimum film viewing requirements include:

A)use of an illuminating device
B)use of a film mount
C)a darkened room
D)all of the above

Question 7

Radiographs taken to confirm that procedures have been completed are called __________.

Question 8

When using rectangular collimation with the paralleling technique one must use a (an):

A)localizing film-holding device
B)bite tab
C)8-inch FFD
D)none of the above

Question 9

Identify the radiographic technique that provides less radiation exposure to the thyroid gland and eyes:

A)paralleling technique
B)bisecting angle technique
C)bite block technique
D)all of the above provide a lower radiation dose to the thyroid gland and eyes

Question 10

An x-ray machine that has tube-head drift may produce dental images that are:

A)distorted
B)blurred
C)cone-cut
D)all of the above

Question 11

Identify the areas of minimum scatter for the dental operator during x-ray exposure:

A)directly behind the tubehead
B)directly behind the patient
C)right angle to the x-ray beam and toward the back of the patient
D)both a and b

Question 12

An area in which a secretary sits constantly that is adjacent to a dental operatory where radiographs are taken is said to have an occupancy factor of:

A)8 hours
B)1
C)1/4
D)1/16
E)5 days

Question 13

Identify the true statement concerning film badges:

A)film badges are expensive
B)the dental operator's radiation exposure can be easily evaluated
C)dental professionals can wear the film badge at all times, indoor and outdoor as well
D)dental professionals can wear the film badge during medical radiation procedures

Question 14

It is predicted that the MPD will ________ be reduced in the near future.

Question 15

The collimator limits the size and shape of the x-ray beam to no more than:

A)one inch at the skin
B)2 inches at the skin
C)3 inches at the skin
D)5 inches at the skin

Question 16

Using E-speed film (instead of D-speed film)reduces the radiation exposure to the patient by approximately:

A)25%
B)50%
C)75%
D)nearly 100%

Question 17

The recommended selection criteria are based on the patient's:

A)medical history
B)dental history
C)thorough clinical examination
D)caries risk assessment
E)all of the above

Question 18

Which of the following results in the greatest reduction of radiation to the patient?

A)low kVp
B)rectangular collimation
C)short developing time
D)high mA

Question 19

Operators of dental radiographic equipment should be able to stand how far from the x-ray tube head during exposure?

A)3 feet
B)6 feet
C)12 feet
D)20 feet