Question 1

Which automatic exposure device works by using a gas-filled chamber?

Accepted Answer

A)   Phototimer
B)   Diode sensor
C)   Ionization chamber
D)   Bucky proliferator

Question 2

If a part measures 14 cm and requires the use of 75 kVp,how much kVp would a part measuring 18 cm require when using a variable kVp-fixed mAs technique chart?

Accepted Answer

A)   67 kVp
B)   77 kVp
C)   83 kVp
D)   91 kVp

Question 3

A technique chart should be established for:

Accepted Answer

A)   each radiographer.
B)   each radiographic tube.
C)   each radiologist.
D)   A and B.
E)   A and C.

Question 4

Which of the following is not part of a standardized technique chart?

Accepted Answer

A)   SID
B)   OID
C)   mA
D)   kVp

Question 5

Which exposure variable is controlled by the automatic exposure control device?

Accepted Answer

A)   kVp
B)   Focal spot size
C)   Seconds
D)   mA

Question 6

Where does a radiographer find the established guidelines for selecting exposure factors for a radiographic examination?

Accepted Answer

A)   Technique chart
B)   Generator control panel
C)   Examination requisition
D)   A or B
E)   B or C

Question 7

A patient measuring 26 cm requires 20 mAs at 75 kVp based on a fixed kVp-variable mAs technique chart.What technique should be used for the next patient,who measures 34 cm?

Accepted Answer

A)   40 mAs at 75 kVp
B)   80 mAs at 75 kVp
C)   20 mAs at 91 kVp
D)   40 mAs at 91 kVp

Question 8

In order to become familiar with manual technical factors (i.e.,setting mAs and kVp and not using AEC) ,it is very helpful to pay attention to the:

Accepted Answer

A)   exposure time.
B)   heat units.
C)   density control.
D)   mAs readout.

Question 9

What is the purpose of a technique chart?

Accepted Answer

A)   To decrease the patient exposure by always using the highest kVp required
B)   To ensure consistent image quality
C)   To reduce the repeat imaging due to technique error and, in turn, reduce the patient exposure
D)   A and B
E)   B and C

Question 10

What describes the shortest exposure time required for the AEC device to operate?

Accepted Answer

A)   Backup time
B)   Minimum response time
C)   Master density time
D)   A and B
E)   A and C

Question 11

If the detector is directly exposed to the primary beam during a film-screen study,the area of interest will appear:

Accepted Answer

A)   overexposed.
B)   underexposed.
C)   correctly exposed.
D)   to have high contrast.

Question 12

Departmental standards,such as the SID or whether an examination is done tabletop or Bucky,should be determined:

Accepted Answer

A)   prior to the development of technique charts.
B)   after the development of technique charts.
C)   at the same time as the development of technique charts.
D)   whenever the department can come to an agreement.

Question 13

The mAs readout:

Accepted Answer

A)   is of little value because it's not necessary to know mAs when using AEC.
B)   reports the actual mAs used for an exposure.
C)   reports the patient dose for the entire imaging study.
D)   allows the radiographer to better set the mAs for an AEC examination.

Question 14

Generally speaking,patient dose will be decreased with the:

Accepted Answer

A)   variable kVp-fixed mAs technique chart design.
B)   variable kVp-variable mAs technique chart design.
C)   fixed kVp-variable mAs technique chart design.
D)   fixed kVp-fixed mAs technique chart design.

Question 15

If the backup time/mAs is automatically set by the x-ray unit,the exposure should end when a maximum of _________ has been reached.

Accepted Answer

A)   600 s
B)   600 kVp
C)   600 mA
D)   600 mAs

Question 16

Using the concept of comparative anatomy,if a child's elbow measures the same as an adult wrist and all other procedural variables are the same (i.e.,SID,image receptor type,etc.) ,the child's elbow will require _____ in comparison to the adult wrist.

Accepted Answer

A)   less mAs
B)   more mAs
C)   the same mAs
D)   higher kVp

Question 17

AEC eliminates the need for the radiographer to select the actual _____ the examination will require.

Accepted Answer

A)   kVp
B)   SID
C)   exposure time
D)   focal spot size

Question 18

Accurate patient measurement is most critical for the:

Accepted Answer

A)   variable kVp-fixed mAs technique chart design.
B)   variable kVp-variable mAs technique chart design.
C)   fixed kVp-variable mAs technique chart design.
D)   fixed kVp-fixed mAs technique chart design.

Question 19

A good reason to use AEC density control is to increase the exposure to the IR to compensate for improper centering.

Accepted Answer

A) True 
 B)False

Question 20

When using AEC,what should the radiographer adjust to manipulate the contrast of the image?

Accepted Answer

A)   kVp
B)   Detector selection
C)   Exposure time
D)   Focal spot size

Exam 8: Exposure Technique Selection

Generally speaking,patient dose will be decreased with the:

Correct AnswerverifiedShow Answer

AEC eliminates the need for the radiographer to select the actual _____ the examination will require.

Correct AnswerverifiedShow Answer

In order to become familiar with manual technical factors (i.e.,setting mAs and kVp and not using AEC) ,it is very helpful to pay attention to the:

Correct AnswerverifiedShow Answer

If the detector is directly exposed to the primary beam during a film-screen study,the area of interest will appear:

Correct AnswerverifiedShow Answer

What describes the shortest exposure time required for the AEC device to operate?

Correct AnswerverifiedShow Answer

Which automatic exposure device works by using a gas-filled chamber?

Correct AnswerverifiedShow Answer

Accurate patient measurement is most critical for the:

Correct AnswerverifiedShow Answer

Which exposure variable is controlled by the automatic exposure control device?

Correct AnswerverifiedShow Answer

A patient measuring 26 cm requires 20 mAs at 75 kVp based on a fixed kVp-variable mAs technique chart.What technique should be used for the next patient,who measures 34 cm?

Correct AnswerverifiedShow Answer

What is the purpose of a technique chart?

Correct AnswerverifiedShow Answer

Using the concept of comparative anatomy,if a child's elbow measures the same as an adult wrist and all other procedural variables are the same (i.e.,SID,image receptor type,etc.) ,the child's elbow will require _____ in comparison to the adult wrist.

Correct AnswerverifiedShow Answer

The mAs readout:

Correct AnswerverifiedShow Answer

If a part measures 14 cm and requires the use of 75 kVp,how much kVp would a part measuring 18 cm require when using a variable kVp-fixed mAs technique chart?

Correct AnswerverifiedShow Answer

A technique chart should be established for:

Correct AnswerverifiedShow Answer

When using AEC,what should the radiographer adjust to manipulate the contrast of the image?

Correct AnswerverifiedShow Answer

Which of the following is not part of a standardized technique chart?

Correct AnswerverifiedShow Answer

Where does a radiographer find the established guidelines for selecting exposure factors for a radiographic examination?

Correct AnswerverifiedShow Answer

If the backup time/mAs is automatically set by the x-ray unit,the exposure should end when a maximum of _________ has been reached.

Correct AnswerverifiedShow Answer

Departmental standards,such as the SID or whether an examination is done tabletop or Bucky,should be determined:

Correct AnswerverifiedShow Answer

A good reason to use AEC density control is to increase the exposure to the IR to compensate for improper centering.

Correct AnswerverifiedShow Answer

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