Question 1

Technique charts are still needed when using AEC.

Accepted Answer

A) True 
 B)False

Question 2

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 
A)  Overexposed 
B)  Underexposed 
C)  Correctly exposed 
D)  To have high contrast

Question 3

When doing a tabletop forearm study with CR, you should:

Accepted Answer

A)  Use AEC 
B)  Set manual technique 
C)  A and B 
D)  None of the above 
A)  Use AEC 
B)  Set manual technique 
C)  A and B 
D)  None of the above

Question 4

When using a technique chart, it is more critical to have precise part measurement when using a digital imaging system.

Accepted Answer

A) True 
 B)False

Question 5

To take advantage of the fact that that digital image processing allows adjustment of the image contrast, optimal kVp for the fixed kVp-variable mAs technique chart for a digital room can be:

Accepted Answer

A)  Significantly lower 
B)  Slightly lower 
C)  The same 
D)  Higher 
A)  Significantly lower 
B)  Slightly lower 
C)  The same 
D)  Higher

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

The most common cause for repeating images done with film-screen and AEC is inaccurate:

Accepted Answer

A)  kVp selection 
B)  Backup mAs selection 
C)  Centering 
D)  Alignment of the tube and image receptor 
A)  kVp selection 
B)  Backup mAs selection 
C)  Centering 
D)  Alignment of the tube and image receptor

Question 8

When doing a film-screen study using AEC, what will happen to the density in the area of interest when changing from -1 to +1 density setting?

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 9

What are calipers used for?

Accepted Answer

A)  To measure the mA 
B)  To select the kVp 
C)  To select focal spot size 
D)  To measure the part 
A)  To measure the mA 
B)  To select the kVp 
C)  To select focal spot size 
D)  To measure the part

Question 10

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

Question 11

A variable kVp-fixed mAs chart may be most effective with:

Accepted Answer

A)  Geriatric patients 
B)  Trauma patients 
C)  Patients imaged with mobile equipment 
D)  Pediatric patients 
A)  Geriatric patients 
B)  Trauma patients 
C)  Patients imaged with mobile equipment 
D)  Pediatric patients

Question 12

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 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 
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

What is the purpose of a technique chart?

Accepted Answer

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

Question 15

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 16

Which of the following is/are true regarding 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 
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

Question 17

Radiographic contrast would be standardized 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 
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 18

Why was automatic exposure control (AEC)originally developed?

Accepted Answer

A)  To decrease the need for technique charts 
B)  To make the radiographer more of a "button pusher" 
C)  To reduce repeats and improve image quality 
D)  To increase productivity and patient dose 
A)  To decrease the need for technique charts 
B)  To make the radiographer more of a "button pusher" 
C)  To reduce repeats and improve image quality 
D)  To increase productivity and patient dose

Question 19

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 
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 20

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

Technique charts are still needed when using AEC.

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

When doing a tabletop forearm study with CR, you should:

When using a technique chart, it is more critical to have precise part measurement when using a digital imaging system.

To take advantage of the fact that that digital image processing allows adjustment of the image contrast, optimal kVp for the fixed kVp-variable mAs technique chart for a digital room can be:

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

The most common cause for repeating images done with film-screen and AEC is inaccurate:

When doing a film-screen study using AEC, what will happen to the density in the area of interest when changing from -1 to +1 density setting?

What are calipers used for?

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

A variable kVp-fixed mAs chart may be most effective with:

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

The mAs readout:

What is the purpose of a technique chart?

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

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

Radiographic contrast would be standardized with the:

Why was automatic exposure control (AEC)originally developed?

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?

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

Radiation and Its Discover

The X-Ray Beam

Image Formation and Radiographic Quality

Exposure Technique Factors

Scatter Control

Image Receptors and Image Acquisition

Image Processing and Display

Image Evaluation

Dynamic Imaging: Fluoroscopy

Filters

Exam 8: Exposure Technique Selection

Technique charts are still needed when using AEC.

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

When doing a tabletop forearm study with CR, you should:

When using a technique chart, it is more critical to have precise part measurement when using a digital imaging system.

To take advantage of the fact that that digital image processing allows adjustment of the image contrast, optimal kVp for the fixed kVp-variable mAs technique chart for a digital room can be:

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

The most common cause for repeating images done with film-screen and AEC is inaccurate:

When doing a film-screen study using AEC, what will happen to the density in the area of interest when changing from -1 to +1 density setting?

What are calipers used for?

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

A variable kVp-fixed mAs chart may be most effective with:

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

The mAs readout:

What is the purpose of a technique chart?

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

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

Radiographic contrast would be standardized with the:

Why was automatic exposure control (AEC)originally developed?

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?

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

Radiation and Its Discover

The X-Ray Beam

Image Formation and Radiographic Quality

Exposure Technique Factors

Scatter Control

Image Receptors and Image Acquisition

Image Processing and Display

Image Evaluation

Dynamic Imaging: Fluoroscopy

Filters