Question 1

Flat-panel detectors for fluoroscopic imaging can be the

Accepted Answer

A)  cesium iodide amorphous silicon indirect-capture detector
B)  amorphous selenium direct-capture detector
C)  amorphous silicon direct-capture detector
D)  A and B
E)  A and CF) C) and D)
G) A) and B)

Question 2

In LCD monitors,the number of TFTs is equal to the

Accepted Answer

A)  number of crystals in the liquid crystal layer
B)  number of pixels displayed
C)  Lp/mm of resolution
D)  display line systemE) A) and D)
F) All of the above

Question 3

The purpose of a camera tube or CCD is to record the fluoroscopic image.

Accepted Answer

A) True 
 B)False

Question 4

The image intensifier is capable of resolving approximately ___________,whereas the monitor can resolve approximately _______________.

Accepted Answer

A)  1-2 Lp/mm;1-2 Lp/mm
B)  1-2 Lp/mm;5 Lp/mm
C)  5 Lp/mm;5 Lp/mm
D)  5 Lp/mm;1-2 Lp/mmE) A) and B)
F) A) and C)

Question 5

The __________________ absorbs electrons and emits light.

Accepted Answer

A)  input phosphor
B)  output phosphor
C)  photocathode
D)  accelerating anodeE) A) and D)
F) B) and C)

Question 6

The electron gun in the television monitor sends out a steady stream of electrons to activate the fluorescent screen.

Accepted Answer

A) True 
 B)False

Question 7

The radiographer is responsible for performance and operational quality control testing.

Accepted Answer

A) True 
 B)False

Question 8

The input phosphor and photocathode form a flat surface

Accepted Answer

A) True 
 B)False

Question 9

Frame averaging is

Accepted Answer

A)  an operation that reduces overall patient dose
B)  an operation that increases overall patient dose
C)  an operation that reduces image noise by averaging multiple image frames together
D)  A and C
E)  B and CF) B) and C)
G) A) and E)

Question 10

Fluoroscopic equipment should be inspected every

Accepted Answer

A)  week
B)  month
C)  6 months
D)  yearE) None of the above
F) A) and B)

Question 11

Age has no effect on an image intensifier because everything takes place in a vacuum.

Accepted Answer

A) True 
 B)False

Question 12

The radiographer may be responsible for the ________________ inspection of the fluoroscopic equipment for quality control purposes.

Accepted Answer

A)  performance
B)  operational
C)  supervisory
D)  A and BE) A) and B)
F) B) and C)

Question 13

In fluoroscopy,shape distortion is caused by

Accepted Answer

A)  angling the x-ray tube
B)  angling the image intensifier in the fluoroscopic tower
C)  inaccurate control or focusing of the electrons released at the periphery of the photocathode,and the curved shape of the photocathode
D)  inaccurate control or focusing of the electrons released at the periphery of the photocathode,and the flat shape of the photocathodeE) A) and B)
F) A) and D)

Question 14

Which of the following is true about the CCD used in digital fluoroscopy?
I.The CCD is more-light sensitive with a higher DQE value.
II.The CCD exhibits less noise and no spatial distortion.
III.The CCD has higher spatial resolution.
IV.The CCD requires more radiation to create an image.

Accepted Answer

A)  I and II only.
B)  I and III only.
C)  I,II,and III only.
D)  I,II,and IV only.
E)  I,II,III,and IV.F) D) and E)
G) C) and E)

Question 15

For detectors to produce high-quality fluoroscopic images,they must be able to

Accepted Answer

A)  respond very quickly
B)  respond many times in a row
C)  have application-specific integrated circuits for noise reduction
D)  all of the aboveE) A) and B)
F) A) and D)

Question 16

When a CCD is exposed to light,it generates and briefly stores light energy.

Accepted Answer

A) True 
 B)False

Question 17

Typical television monitors are

Accepted Answer

A)  300 line systems
B)  450 line systems
C)  525 line systems
D)  875 line systemsE) A) and B)
F) C) and D)

Question 18

Inspecting the protective curtain,Bucky slot cover,and fluoroscopic timer are part of the

Accepted Answer

A)  performance quality control testing
B)  operational quality control testing
C)  supervisory
D)  A and BE) B) and C)
F) A) and C)

Question 19

ABC is very similar to AEC in that it controls the length of the exposure to maintain consistent image brightness.

Accepted Answer

A) True 
 B)False

Question 20

In terms of resolution,the weakest part of the fluoroscopic system is the

Accepted Answer

A)  image intensifier
B)  television monitor
C)  camera tube
D)  None of the aboveE) None of the above
F) B) and C)

Exam 14: Image Intensified Fluoroscopy

For detectors to produce high-quality fluoroscopic images,they must be able to

Correct AnswerverifiedShow Answer

Frame averaging is

Correct AnswerverifiedShow Answer

The radiographer may be responsible for the ________________ inspection of the fluoroscopic equipment for quality control purposes.

Correct AnswerverifiedShow Answer

The purpose of a camera tube or CCD is to record the fluoroscopic image.

Correct AnswerverifiedShow Answer

Which of the following is true about the CCD used in digital fluoroscopy? I.The CCD is more-light sensitive with a higher DQE value. II.The CCD exhibits less noise and no spatial distortion. III.The CCD has higher spatial resolution. IV.The CCD requires more radiation to create an image.

Correct AnswerverifiedShow Answer

Age has no effect on an image intensifier because everything takes place in a vacuum.

Correct AnswerverifiedShow Answer

In fluoroscopy,shape distortion is caused by

Correct AnswerverifiedShow Answer

The input phosphor and photocathode form a flat surface

Correct AnswerverifiedShow Answer

Fluoroscopic equipment should be inspected every

Correct AnswerverifiedShow Answer

In terms of resolution,the weakest part of the fluoroscopic system is the

Correct AnswerverifiedShow Answer

The radiographer is responsible for performance and operational quality control testing.

Correct AnswerverifiedShow Answer

In LCD monitors,the number of TFTs is equal to the

Correct AnswerverifiedShow Answer

ABC is very similar to AEC in that it controls the length of the exposure to maintain consistent image brightness.

Correct AnswerverifiedShow Answer

The image intensifier is capable of resolving approximately ___________,whereas the monitor can resolve approximately _______________.

Correct AnswerverifiedShow Answer

The __________________ absorbs electrons and emits light.

Correct AnswerverifiedShow Answer

The electron gun in the television monitor sends out a steady stream of electrons to activate the fluorescent screen.

Correct AnswerverifiedShow Answer

When a CCD is exposed to light,it generates and briefly stores light energy.

Correct AnswerverifiedShow Answer

Inspecting the protective curtain,Bucky slot cover,and fluoroscopic timer are part of the

Correct AnswerverifiedShow Answer

Flat-panel detectors for fluoroscopic imaging can be the

Correct AnswerverifiedShow Answer

Typical television monitors are

Correct AnswerverifiedShow Answer

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The image intensifier is capable of resolving approximately _,whereas the monitor can resolve approximately _____.

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