Question 1

With digital imaging using AEC,if an AP thoracic spine is imaged with the density setting changed from 0 to +2,the brightness in the area of interest is __________________ and the exposure time is ________________________.(Assume all other factors are appropriate. )

Accepted Answer

A)  darker;longer
B)  darker;shorter
C)  unchanged;unchanged
D)  unchanged;longerE) A) and B)
F) C) and D)

Question 2

There is typically a configuration of at least _________ AEC detectors in place

Accepted Answer

A)  2
B)  3
C)  4
D)  5E) A) and D)
F) B) and C)

Question 3

The amount of electric charge produced in an AEC detector depends on the amount of radiation absorbed by the detector.

Accepted Answer

A) True 
 B)False

Question 4

In imaging a child,a short exposure time is needed for an examination using AEC.The mA setting should

Accepted Answer

A)  be low
B)  be mid-range
C)  be high
D)  It doesn't matter-the AEC device will control the exposure timeE) B) and C)
F) None of the above

Question 5

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
E)  B and CF) D) and E)
G) A) and E)

Question 6

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 aboveE) None of the above
F) A) and D)

Question 7

When using AEC,the radiographer is responsible for determining

Accepted Answer

A)  kVp
B)  mAs
C)  exposure timeD) A) and B)
E) A) and C)

Question 8

The primary purpose of AEC is to

Accepted Answer

A)  reduce patient exposure
B)  control the amount of radiation reaching the IR
C)  control image contrast
D)  eliminate the need for the radiographer to think criticallyE) None of the above
F) A) and D)

Question 9

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 detectorsE) C) and D)
F) B) and D)

Question 10

When the x-rays enter the ionization chamber

Accepted Answer

A)  atoms become ions
B)  atoms give up electrons
C)  electrons and positive ions become electricity
D)  All of the aboveE) A) and D)
F) B) and C)

Question 11

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)  1000E) C) and D)
F) B) and C)

Question 12

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;decreasedE) B) and C)
F) A) and B) C

Question 13

AED and phototiming are accurate terms that can be used in place of automatic exposure control.

Accepted Answer

A) True 
 B)False

Question 14

The AEC system will automatically adjust to changing image receptor types such as switching from a 400-speed film-screen system to a 600-speed film-screen system.

Accepted Answer

A) True 
 B)False  False

Question 15

Phototimer AEC devices convert the radiation to light energy.

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

A)  ionization chamber
B)  Geiger counter
C)  phototimer
D)  none of the aboveE) A) and C)
F) C) and D) A

Question 17

The original type of AEC detector was the

Accepted Answer

A)  ionization chamber
B)  Geiger counter
C)  phototimer
D)  none of the aboveE) A) and B)
F) C) and D)

Question 18

Which of the following patient conditions require a change in technical factors?

Accepted Answer

A)  Plaster casts.
B)  Additive diseases.
C)  Destructive diseases.
D)  Use of contrast media.
E)  All of the above.F) All of the above
G) B) and D)

Question 19

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 appropriateD) None of the above
E) B) and C)

Question 20

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 captureE) B) and C)
F) A) and D)

Exam 13: Exposure Technique Selection

With digital imaging using AEC,if an AP thoracic spine is imaged with the density setting changed from 0 to +2,the brightness in the area of interest is __________________ and the exposure time is ________________________.(Assume all other factors are appropriate. )

Correct AnswerverifiedShow Answer

There is typically a configuration of at least _________ AEC detectors in place

Correct AnswerverifiedShow Answer

The amount of electric charge produced in an AEC detector depends on the amount of radiation absorbed by the detector.

Correct AnswerverifiedShow Answer

In imaging a child,a short exposure time is needed for an examination using AEC.The mA setting should

Correct AnswerverifiedShow Answer

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

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

When using AEC,the radiographer is responsible for determining

Correct AnswerverifiedShow Answer

The primary purpose of AEC is to

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When the x-rays enter the ionization chamber

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

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 AnswerverifiedC

AED and phototiming are accurate terms that can be used in place of automatic exposure control.

Correct AnswerverifiedShow Answer

The AEC system will automatically adjust to changing image receptor types such as switching from a 400-speed film-screen system to a 600-speed film-screen system.

Correct AnswerverifiedFalse

Phototimer AEC devices convert the radiation to light energy.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

The original type of AEC detector was the

Correct AnswerverifiedShow Answer

Which of the following patient conditions require a change in technical factors?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The two types of detectors used in AEC are

Correct AnswerverifiedShow Answer

With digital imaging using AEC,if an AP thoracic spine is imaged with the density setting changed from 0 to +2,the brightness in the area of interest is and the exposure time is ______.(Assume all other factors are appropriate. )

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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
verified
C

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified