Question 1

The reason to have a back-up time is to

Accepted Answer

A)  protect the patient from excessive exposure 
B)  make sure the right mAs is used 
C)  keep the tube from excessive heat-loading 
D)  protect the patient from excessive exposure and keep the tube from excessive heat-loading

Question 2

It is safe to assume that anatomically programmed techniques have been developed to produce the best quality images with the least amount of exposure.

Accepted Answer

A) True 
 B)False

Question 3

The AEC minimum response time may pose a problem when

Accepted Answer

A)  a long exposure time is needed 
B)  the patient can easily hold still for the exposure 
C)  the patient is unable to hold still for the exposure 
D)  All of these

Question 4

If the radiographer is doing an upright chest using AEC but the table bucky is selected

Accepted Answer

A)  the back-up time will be reached 
B)  the patient will be exposed to excessive radiation 
C)  the IR will be overexposed 
D)  All of these

Question 5

When there is a significant amount of scatter radiation reaching the detector, the exposure time will

Accepted Answer

A)  be shorter than needed 
B)  be appropriate 
C)  be longer than needed 
D)  reach the backup mAs

Question 6

Collimation is not required when AEC is used.

Accepted Answer

A) True 
 B)False

Question 7

The original type of AEC detector was the

Accepted Answer

A)  ionization chamber 
B)  Geiger counter 
C)  phototimer 
D)  none of these

Question 8

Using the plus or minus exposure adjustments should be done frequently to produce quality images with AEC.

Accepted Answer

A) True 
 B)False

Question 9

Ionization chamber AEC detectors are entrance-type devices because the x-rays must

Accepted Answer

A)  enter the detector after passing through the IR 
B)  enter the detector before entering the patient 
C)  enter the detector before getting to the IR

Question 10

Pre-established guidelines used by the radiographer to select standardized manual or AEC exposure factors for each type of radiographic examination are called

Accepted Answer

A)  anatomical programming 
B)  exposure technique charts 
C)  mA reciprocity 
D)  quantum noise detectors

Question 11

The actual amount of exposure used for an image when AEC is being used is the

Accepted Answer

A)  mAs readout 
B)  back-up time 
C)  minimum response time 
D)  density controls

Question 12

The two types of detectors used in AEC are

Accepted Answer

A)  image intensifiers and phototimers 
B)  phototimers and ionization chambers 
C)  ionization chambers and Geiger counters 
D)  direct and indirect capture

Question 13

The mAs readout is of little value because there is no need to set manual exposure factors.

Accepted Answer

A) True 
 B)False

Question 14

AEC devices should be calibrated

Accepted Answer

A)  when the unit is first installed 
B)  at regular intervals 
C)  when there is a change in the type of IR being used 
D)  All of these

Question 15

With digital imaging using AEC, if an AP thoracic spine is imaged using 110 kVp instead of 80 kVp, the patient exposure is _______________________. (Assume all other factors are appropriate.)

Accepted Answer

A)  higher 
B)  unchanged 
C)  lower 
D)  excessive

Question 16

When using AEC with digital imaging, errors resulting in overexposure to the IR result in

Accepted Answer

A)  images that have insufficient brightness 
B)  images with appropriate brightness 
C)  overexposed patients 
D)  images with appropriate brightness and overexposed patients

Question 17

These can be adjusted to increase or decrease the amount of radiation needed to terminate the exposure using AEC

Accepted Answer

A)  mAs readout 
B)  back-up time 
C)  minimum response time 
D)  exposure adjustment

Question 18

___________________ identify optimal kVp values and alter the mAs for variations in part thickness

Accepted Answer

A)  Fixed kVp-variable mAs 
B)  Variable kVp-variable mAs 
C)  Fixed kVp-Fixed mAs 
D)  Variable kVp-fixed mAs

Question 19

Which of the following patient conditions require a change in technical factors?
1) Plaster casts
2) Obesity
3) Additive disease

Accepted Answer

A)  plaster casts and obesity only 
B)  plaster casts and additive disease only 
C)  obesity and additive disease only 
D)  plaster casts, obesity, and additive disease

Question 20

If the back-up time is shorter than the actual exposure time needed for a properly exposed image

Accepted Answer

A)  the image receptor will be overexposed 
B)  the image receptor will be underexposed 
C)  the exposure will be appropriate 
D)  the x-ray tube will overheat

Exam 13: Exposure Technique Selection

The reason to have a back-up time is to

It is safe to assume that anatomically programmed techniques have been developed to produce the best quality images with the least amount of exposure.

The AEC minimum response time may pose a problem when

If the radiographer is doing an upright chest using AEC but the table bucky is selected

When there is a significant amount of scatter radiation reaching the detector, the exposure time will

Collimation is not required when AEC is used.

The original type of AEC detector was the

Using the plus or minus exposure adjustments should be done frequently to produce quality images with AEC.

Ionization chamber AEC detectors are entrance-type devices because the x-rays must

Pre-established guidelines used by the radiographer to select standardized manual or AEC exposure factors for each type of radiographic examination are called

The actual amount of exposure used for an image when AEC is being used is the

The two types of detectors used in AEC are

The mAs readout is of little value because there is no need to set manual exposure factors.

AEC devices should be calibrated

With digital imaging using AEC, if an AP thoracic spine is imaged using 110 kVp instead of 80 kVp, the patient exposure is _______________________. (Assume all other factors are appropriate.)

When using AEC with digital imaging, errors resulting in overexposure to the IR result in

These can be adjusted to increase or decrease the amount of radiation needed to terminate the exposure using AEC

___________________ identify optimal kVp values and alter the mAs for variations in part thickness

Which of the following patient conditions require a change in technical factors? 1) Plaster casts 2) Obesity 3) Additive disease

If the back-up time is shorter than the actual exposure time needed for a properly exposed image