Question 1

The testing to see that the AEC device terminates the exposure at the same level of exposure,regardless of variations in other factors such as kVp or patient thickness is checking for __________________ and optical densities should be within +/- ________.

Accepted Answer

A)   reproducibility;0.1
B)   calibration;2
C)   consistency;0.2
D)   none of the above

Question 2

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)   none of the above

Question 3

Using the plus or minus density controls should be done frequently to produce optimal images with AEC.

Accepted Answer

A) True 
 B)False

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 the above

Question 5

An ionization chamber is a hollow device that contains:

Accepted Answer

A)   water
B)   lead
C)   tungsten
D)   air

Question 6

Once the electric charge from an AEC detector reaches a preset point:

Accepted Answer

A)   the patient can leave
B)   the kVp will be reduced to 0
C)   the exposure will stop
D)   all of the above

Question 7

When using AEC,the exit radiation is converted into an electrical signal.

Accepted Answer

A) True 
 B)False

Question 8

The predetermined level of radiation exposure needed to terminate the exposure when using AEC is set by:

Accepted Answer

A)   the radiologist
B)   the technologist
C)   people who service the equipment
D)   the manufacturer

Question 9

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 the above

Question 10

Today's AEC system is most likely use a(n) :

Accepted Answer

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

Question 11

If an AEC has three detectors,only one of the three can be selected for an exposure.

Accepted Answer

A) True 
 B)False

Question 12

When your patient for an AP abdomen is very heavy,using AEC results in:

Accepted Answer

A)   underexposure to the IR
B)   overexposure to the IR
C)   appropriate exposure to the IR

Question 13

If the back-up time is set by the equipment,the exposure time should end when the mAs reaches:

Accepted Answer

A)   100
B)   400
C)   600
D)   1000

Question 14

All APR settings use AEC

Accepted Answer

A) True 
 B)False

Question 15

The shortest exposure time that a radiographic tube with AEC can have is the:

Accepted Answer

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

Question 16

When using AEC,the radiographer is responsible for determining:

Accepted Answer

A)   kVp
B)   mAs
C)   exposure time
D)   none of the above

Question 17

If the patient for an AP thoracic spine image is centered so that the spine is not over the top of the detector:

Accepted Answer

A)   the film image will be too dark
B)   the film image will be too light
C)   the IR will be overexposed
D)   A and C

Question 18

The maximum length of time that an exposure lasts when using AEC is the:

Accepted Answer

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

Question 19

The device that converts the light energy to an electrical signal is the:

Accepted Answer

A)   photodiode
B)   photocathode
C)   photomultiplier tube
D)   A and C

Question 20

With digital imaging using AEC,if an AP thoracic spine is imaged using an outside instead of center detector,the brightness in the area of interest will be __________________ and the quantum noise will be ________________________.(Assume all other factors are appropriate. )

Accepted Answer

A)   light;increased
B)   appropriate;decreased
C)   appropriate;increased
D)   dark;decreased

Exam 13: Automatic Exposure Control

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

Correct AnswerverifiedShow Answer

The two types of detectors used in AEC are:

Correct AnswerverifiedShow Answer

If the back-up time is set by the equipment,the exposure time should end when the mAs reaches:

Correct AnswerverifiedShow Answer

The device that converts the light energy to an electrical signal is the:

Correct AnswerverifiedShow Answer

An ionization chamber is a hollow device that contains:

Correct AnswerverifiedShow Answer

The maximum length of time that an exposure lasts when using AEC is the:

Correct AnswerverifiedShow Answer

When your patient for an AP abdomen is very heavy,using AEC results in:

Correct AnswerverifiedShow Answer

All APR settings use AEC

Correct AnswerverifiedShow Answer

The testing to see that the AEC device terminates the exposure at the same level of exposure,regardless of variations in other factors such as kVp or patient thickness is checking for __________________ and optical densities should be within +/- ________.

Correct AnswerverifiedShow Answer

The AEC minimum response time may pose a problem when:

Correct AnswerverifiedShow Answer

When using AEC,the radiographer is responsible for determining:

Correct AnswerverifiedShow Answer

Today's AEC system is most likely use a(n) :

Correct AnswerverifiedShow Answer

Once the electric charge from an AEC detector reaches a preset point:

Correct AnswerverifiedShow Answer

If the patient for an AP thoracic spine image is centered so that the spine is not over the top of the detector:

Correct AnswerverifiedShow Answer

The predetermined level of radiation exposure needed to terminate the exposure when using AEC is set by:

Correct AnswerverifiedShow Answer

When using AEC,the exit radiation is converted into an electrical signal.

Correct AnswerverifiedShow Answer

Using the plus or minus density controls should be done frequently to produce optimal images with AEC.

Correct AnswerverifiedShow Answer

With digital imaging using AEC,if an AP thoracic spine is imaged using an outside instead of center detector,the brightness in the area of interest will be __________________ and the quantum noise will be ________________________.(Assume all other factors are appropriate. )

Correct AnswerverifiedShow Answer

The shortest exposure time that a radiographic tube with AEC can have is the:

Correct AnswerverifiedShow Answer

If an AEC has three detectors,only one of the three can be selected for an exposure.

Correct AnswerverifiedShow Answer

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The testing to see that the AEC device terminates the exposure at the same level of exposure,regardless of variations in other factors such as kVp or patient thickness is checking for __________ and optical densities should be within +/- .

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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With digital imaging using AEC,if an AP thoracic spine is imaged using an outside instead of center detector,the brightness in the area of interest will be and the quantum noise will be ______.(Assume all other factors are appropriate. )

Correct Answer
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Correct Answer
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Correct Answer
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