Question 1

When a digital IR is overexposed due to poor use of AEC:

Accepted Answer

A)  image contrast will be increased. 
B)  quantum noise may be highly visible. 
C)  patient exposure is increased. 
D)  patient exposure is unaffected. 
A)  image contrast will be increased. 
B)  quantum noise may be highly visible. 
C)  patient exposure is increased. 
D)  patient exposure is unaffected.

Question 2

A good time to use AEC is when the radiographer is unable to accurately center the x-ray beam.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is a system that allows the radiographer to select a particular button on the control panel that represents an anatomic area and displays a preprogrammed set of exposure factors?

Accepted Answer

A)  mAs readout 
B)  Anatomically programmed technique 
C)  Automatic exposure control 
D)  Phototiming 
A)  mAs readout 
B)  Anatomically programmed technique 
C)  Automatic exposure control 
D)  Phototiming

Question 4

Which automatic exposure device works by converting x-ray photons first into light and then into an electronic signal?

Accepted Answer

A)  Phototimer 
B)  Gas detector 
C)  Ionization chamber 
D)  Backup timer 
A)  Phototimer 
B)  Gas detector 
C)  Ionization chamber 
D)  Backup timer

Question 5

When exposure factors are selected using anatomically programmed technique,the variables should not be adjusted.

Accepted Answer

A) True 
 B)False

Question 6

When the radiographer is considering whether to repeat an image using AEC,it is important to determine the reason the first radiograph failed.

Accepted Answer

A) True 
 B)False

Question 7

When doing a film-screen study using AEC,what will happen to the density in the area of interest when changing from 70 to 90 kVp?

Accepted Answer

A)  Density will increase. 
B)  Density will decrease. 
C)  Density will not change. 
A)  Density will increase. 
B)  Density will decrease. 
C)  Density will not change.

Question 8

What is the appropriate setting for backup time/mAs?

Accepted Answer

A)  50% of the expected mAs 
B)  100% of the expected mAs 
C)  150% of the expected mAs 
D)  400% of the expected mAs 
A)  50% of the expected mAs 
B)  100% of the expected mAs 
C)  150% of the expected mAs 
D)  400% of the expected mAs

Question 9

With AEC it is easy to use multiple types of image receptors,because the detectors can sense image receptor type and make appropriate adjustments.

Accepted Answer

A) True 
 B)False

Question 10

If a technique chart is being used,and the IR is overexposed,the radiographer should assume the chart is inaccurate and come up with his or her own exposure factors.

Accepted Answer

A) True 
 B)False

Question 11

What is the purpose of setting a backup time/mAs?

Accepted Answer

A)  To prevent excessive exposure of the patient 
B)  To make certain the contrast is acceptable if the chosen kVp is too low 
C)  To make certain the density is acceptable if the patient moves 
D)  To prevent the selection of the wrong detector 
A)  To prevent excessive exposure of the patient 
B)  To make certain the contrast is acceptable if the chosen kVp is too low 
C)  To make certain the density is acceptable if the patient moves 
D)  To prevent the selection of the wrong detector

Question 12

Optimal kVp values for each anatomic area have been established by law.

Accepted Answer

A) True 
 B)False

Question 13

What would the result be if a film-screen radiographic examination required an exposure time shorter than the minimum response time of the AEC sensors?

Accepted Answer

A)  Image density would be optimal. 
B)  Image density would be excessive. 
C)  Response time has nothing to do with AEC. 
D)  Image contrast would be high. 
A)  Image density would be optimal. 
B)  Image density would be excessive. 
C)  Response time has nothing to do with AEC. 
D)  Image contrast would be high.

Question 14

AEC can be used with tabletop examinations.

Accepted Answer

A) True 
 B)False

Question 15

When using film-screen,what happens when an outside detector is selected for an AP thoracic spine?

Accepted Answer

A)  The spine will have insufficient contrast. 
B)  The spine will be too dark. 
C)  The spine will have excessive contrast. 
D)  The spine will have insufficient density. 
A)  The spine will have insufficient contrast. 
B)  The spine will be too dark. 
C)  The spine will have excessive contrast. 
D)  The spine will have insufficient density.

Question 16

Which of the following is/are true regarding the development of an effective technique chart?

Accepted Answer

A)  The radiographic equipment must be operating properly. 
B)  A good-quality control program is in place. 
C)  The equipment must be from the same manufacturer. 
D)  A and B. 
E)  A and C. 
A)  The radiographic equipment must be operating properly. 
B)  A good-quality control program is in place. 
C)  The equipment must be from the same manufacturer. 
D)  A and B. 
E)  A and C.

Question 17

Why was automatic exposure control (AEC)developed?

Accepted Answer

A)  To decrease the need for technique charts 
B)  To make the radiographer more of a "button pusher" 
C)  To determine the radiation exposure required to produce a quality image 
D)  To increase the productivity and the patient dose 
A)  To decrease the need for technique charts 
B)  To make the radiographer more of a "button pusher" 
C)  To determine the radiation exposure required to produce a quality image 
D)  To increase the productivity and the patient dose

When a digital IR is overexposed due to poor use of AEC:

A good time to use AEC is when the radiographer is unable to accurately center the x-ray beam.

Which of the following is a system that allows the radiographer to select a particular button on the control panel that represents an anatomic area and displays a preprogrammed set of exposure factors?

Which automatic exposure device works by converting x-ray photons first into light and then into an electronic signal?

When exposure factors are selected using anatomically programmed technique,the variables should not be adjusted.

When the radiographer is considering whether to repeat an image using AEC,it is important to determine the reason the first radiograph failed.

When doing a film-screen study using AEC,what will happen to the density in the area of interest when changing from 70 to 90 kVp?

What is the appropriate setting for backup time/mAs?

With AEC it is easy to use multiple types of image receptors,because the detectors can sense image receptor type and make appropriate adjustments.

If a technique chart is being used,and the IR is overexposed,the radiographer should assume the chart is inaccurate and come up with his or her own exposure factors.

What is the purpose of setting a backup time/mAs?

Optimal kVp values for each anatomic area have been established by law.

What would the result be if a film-screen radiographic examination required an exposure time shorter than the minimum response time of the AEC sensors?

AEC can be used with tabletop examinations.

When using film-screen,what happens when an outside detector is selected for an AP thoracic spine?

Which of the following is/are true regarding the development of an effective technique chart?

Why was automatic exposure control (AEC)developed?

Radiation and Its Discovery

The X-Ray Beam

Image Formation and Radiographic Quality

Digital Imaging

Film-Screen Imaging

Exposure Technique Factors

Scatter Control

Image Evaluation

Dynamic Imaging: Fluoroscopy

Filters

Exam 8: Exposure Technique Selection

When a digital IR is overexposed due to poor use of AEC:

A good time to use AEC is when the radiographer is unable to accurately center the x-ray beam.

Which of the following is a system that allows the radiographer to select a particular button on the control panel that represents an anatomic area and displays a preprogrammed set of exposure factors?

Which automatic exposure device works by converting x-ray photons first into light and then into an electronic signal?

When exposure factors are selected using anatomically programmed technique,the variables should not be adjusted.

When the radiographer is considering whether to repeat an image using AEC,it is important to determine the reason the first radiograph failed.

When doing a film-screen study using AEC,what will happen to the density in the area of interest when changing from 70 to 90 kVp?

What is the appropriate setting for backup time/mAs?

With AEC it is easy to use multiple types of image receptors,because the detectors can sense image receptor type and make appropriate adjustments.

If a technique chart is being used,and the IR is overexposed,the radiographer should assume the chart is inaccurate and come up with his or her own exposure factors.

What is the purpose of setting a backup time/mAs?

Optimal kVp values for each anatomic area have been established by law.

What would the result be if a film-screen radiographic examination required an exposure time shorter than the minimum response time of the AEC sensors?

AEC can be used with tabletop examinations.

When using film-screen,what happens when an outside detector is selected for an AP thoracic spine?

Which of the following is/are true regarding the development of an effective technique chart?

Why was automatic exposure control (AEC)developed?

Radiation and Its Discovery

The X-Ray Beam

Image Formation and Radiographic Quality

Digital Imaging

Film-Screen Imaging

Exposure Technique Factors

Scatter Control

Image Evaluation

Dynamic Imaging: Fluoroscopy

Filters