Question 1

Added filtration in the dental x-ray tubehead:

Accepted Answer

A)   Refers to the placement of tungsten discs in the path of the x-ray beam between the collimator and the tubehead seal.
B)   Filters out shorter-wavelength x-rays from the x-ray beam.
C)   Results in a lower-energy beam.
D)   Results in a more penetrating useful beam.

Question 2

The ALARA concept states that all radiation must be kept:

Accepted Answer

A)   As long as readily achievable.
B)   As low as reasonably allowable.
C)   As low as reasonably achievable.
D)   As long as reliably achievable.

Question 3

On some dental x-ray machines, only the ____ can be altered; the other parameters are preset by the manufacturer.

Accepted Answer

A)   kilovoltage peak
B)   exposure time
C)   PID length
D)   milliamperage

Question 4

The thyroid collar:

Accepted Answer

A)   Is recommended for all intraoral films.
B)   Is recommended for all extraoral films.
C)   May exist as a separate shield or as part of the lead apron.
D)   Both a and c.

Question 5

Which of the following types of position-indicating devices (PIDs)  do not produce scatter radiation?

Accepted Answer

A)   Rectangular
B)   Conical
C)   Round
D)   Both a and c

Question 6

To avoid the primary beam, the dental radiographer must be positioned at a ____-degree to ____-degree angle to the beam.

Accepted Answer

A)   0; 45
B)   45; 90
C)   90; 135
D)   135; 180 C

Question 7

Which of the following occurrences during and after x-ray film exposure reduce(s)  the amount of x-radiation a patient receives?

Accepted Answer

A)   Artifacts caused by improper film handling
B)   Retakes
C)   Proper film processing
D)   Nondiagnostic films

Question 8

A rectangular collimator:

Accepted Answer

A)   Restricts the beam more than a circular collimator.
B)   Restricts the beam less than a circular collimator.
C)   Significantly reduces patient exposure.
D)   Both a and c

Question 9

Which type of PID would be most effective in reducing patient exposure?

Accepted Answer

A)   Conical
B)   16-inch round PID
C)   8-inch rectangular PID
D)   16-inch rectangular PID D

Question 10

____-speed film is currently the fastest intraoral film available.

Accepted Answer

A)   D
B)   E
C)   F
D)   G

Question 11

According to the current recommendations (2003)  of the National Council on Radiation Protection and Measurements, the current MPD for occupationally exposed persons is ____/year.

Accepted Answer

A)   500 millirem
B)   5.0 rem
C)   50 rem
D)   5000 rem

Question 12

The collimator:

Accepted Answer

A)   Is always round.
B)   Restricts the size and shape of the x-ray beam.
C)   Is a solid piece of aluminum.
D)   Is fitted within the copper stem beneath the molybdenum cup.

Question 13

The "Guidelines for Prescribing Dental Radiographs" state that:

Accepted Answer

A)   Dentulous adults should have posterior bite-wing examinations at 12- to 36-month intervals.
B)   The recommendations do not need to be altered because of pregnancy.
C)   Edentulous adults should have posterior bite-wing examinations at 12- to 36-month intervals.
D)   Both a and b.

Question 14

Inherent filtration in the dental x-ray tubehead:

Accepted Answer

A)   Includes filtration that takes place when the primary beam passes through the glass window of the x-ray tube, the insulating oil, and the tubehead seal.
B)   Includes the placement of aluminum discs in the path of the x-ray beam between the collimator and the tubehead seal.
C)   Alone meets the standards regulated by state and federal law.
D)   Is equivalent to approximately 5.0 mm of aluminum.

Question 15

____ is an example of a patient protection technique used before x-ray exposure.

Accepted Answer

A)   Proper film processing
B)   Proper prescribing of radiographs
C)   A lead apron
D)   A thyroid collar

Question 16

According to the current recommendations (2003)  of the National Council on Radiation Protection and Measurements, the current MPD for an occupationally exposed pregnant women is the same as that for:

Accepted Answer

A)   An occupationally exposed nonpregnant women.
B)   An occupationally exposed man.
C)   An occupationally exposed child under 18.
D)   A nonoccupationally exposed person.

Question 17

The primary dictum of operator protection guidelines is that the operator must:

Accepted Answer

A)   Remain in the room with the patient while the film is being exposed.
B)   Avoid the primary beam.
C)   Hold the film in the patient's mouth with their own finger.
D)   Hold the tubehead during x-ray exposure.

Question 18

A film badge:

Accepted Answer

A)   Is worn at waist level by the patient.
B)   Is worn at waist level by the operator.
C)   Is clipped to the shirt pocket of the operator.
D)   Is clipped to the shirt pocket of the patient. B

Question 19

The acronym for the permitted lifetime accumulated dose is:

Accepted Answer

A)   MPD-maximum permissible dose
B)   MPD-maximum possible dose
C)   MAD-maximum accumulated dose
D)   MAD-maximum allowed dose

Question 20

Radiation legislation varies greatly from state to state. For example, in some states a dental radiographer must successfully complete a radiation safety examination before he or she may expose dental x-rays.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second statement is false.
D)   The first statement is false; the second statement is true.

Exam 5: Radiation Protection

Added filtration in the dental x-ray tubehead:

Correct AnswerverifiedShow Answer

The ALARA concept states that all radiation must be kept:

Correct AnswerverifiedShow Answer

On some dental x-ray machines, only the ____ can be altered; the other parameters are preset by the manufacturer.

Correct AnswerverifiedShow Answer

The thyroid collar:

Correct AnswerverifiedShow Answer

Which of the following types of position-indicating devices (PIDs) do not produce scatter radiation?

Correct AnswerverifiedShow Answer

To avoid the primary beam, the dental radiographer must be positioned at a ____-degree to ____-degree angle to the beam.

Correct AnswerverifiedC

Which of the following occurrences during and after x-ray film exposure reduce(s) the amount of x-radiation a patient receives?

Correct AnswerverifiedShow Answer

A rectangular collimator:

Correct AnswerverifiedShow Answer

Which type of PID would be most effective in reducing patient exposure?

Correct AnswerverifiedD

____-speed film is currently the fastest intraoral film available.

Correct AnswerverifiedShow Answer

According to the current recommendations (2003) of the National Council on Radiation Protection and Measurements, the current MPD for occupationally exposed persons is ____/year.

Correct AnswerverifiedShow Answer

The collimator:

Correct AnswerverifiedShow Answer

The "Guidelines for Prescribing Dental Radiographs" state that:

Correct AnswerverifiedShow Answer

Inherent filtration in the dental x-ray tubehead:

Correct AnswerverifiedShow Answer

____ is an example of a patient protection technique used before x-ray exposure.

Correct AnswerverifiedShow Answer

According to the current recommendations (2003) of the National Council on Radiation Protection and Measurements, the current MPD for an occupationally exposed pregnant women is the same as that for:

Correct AnswerverifiedShow Answer

The primary dictum of operator protection guidelines is that the operator must:

Correct AnswerverifiedShow Answer

A film badge:

Correct AnswerverifiedB

The acronym for the permitted lifetime accumulated dose is:

Correct AnswerverifiedShow Answer

Radiation legislation varies greatly from state to state. For example, in some states a dental radiographer must successfully complete a radiation safety examination before he or she may expose dental x-rays.

Correct AnswerverifiedShow Answer

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To avoid the primary beam, the dental radiographer must be positioned at a -degree to -degree angle to the beam.

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C

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D

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B

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