Question 1

Which of the following has the possibility of demonstrating veiling glare and pincushion distortion?

Accepted Answer

A)   conventional image intensifier
B)   flat-panel detector in place of image intensifier
C)   there is no difference between the twoD) B) and C)
E) None of the above

Question 2

The gain related to the decrease in size from the input to the output phosphor is the:

Accepted Answer

A)   brightness gain
B)   flux gain
C)   minification gain
D)   conversion factorE) A) and B)
F) B) and C)

Question 3

This part of the image intensifier absorbs light and produces electrons.

Accepted Answer

A)   input phosphor
B)   output phosphor
C)   photocathode
D)   electrostatic focusing lensesE) A) and B)
F) A) and C)

Question 4

Which of the following accurately shows the energy sequence during fluoroscopy?

Accepted Answer

A)   light to x-rays to electrons to light
B)   x-rays to light to electrons to light
C)   x-rays to electrons to light
D)   electrons to light to electronsE) C) and D)
F) None of the above

Question 5

Early versions of digital fluoroscopy used the standard system and added:

Accepted Answer

A)   a different camera
B)   an ADC
C)   videotape
D)   none of the aboveE) None of the above
F) B) and D)

Question 6

Typical television monitors have:

Accepted Answer

A)   300 lines
B)   450 lines
C)   525 lines
D)   875 linesE) A) and B)
F) A) and D)

Question 7

The conventional method for viewing the fluoroscopic image is by:

Accepted Answer

A)   using a handheld device
B)   looking directly at the output phosphor
C)   using a television monitor
D)   using a mirror-optics systemE) A) and D)
F) C) and D)

Question 8

The image intensifier was introduced in the:

Accepted Answer

A)   1920s
B)   1950s
C)   1970s
D)   1980sE) All of the above
F) None of the above

Question 9

Which of the following degrades with age and has a lower DQE?

Accepted Answer

A)   conventional image intensifier
B)   flat-panel detector in place of image intensifier
C)   there is no difference between the twoD) All of the above
E) None of the above

Question 10

A loss of brightness around the edge of the fluoroscopic image caused by the curve of the photocathode is:

Accepted Answer

A)   noise
B)   pincushion appearance
C)   vignetting
D)   magnificationE) B) and C)
F) None of the above

Question 11

Photoemission occurs at the:

Accepted Answer

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

Question 12

The image intensifier improved fluoroscopy by:

Accepted Answer

A)   making the image easier to see because it is brighter
B)   making the image easier to see because it is bigger
C)   allowing indirect viewing of the fluoroscopic image
D)   A and CE) A) and C)
F) All of the above

Question 13

The potential difference across the image intensifier is approximately:

Accepted Answer

A)   25 V
B)   250 V
C)   25 kV
D)   250 kVE) B) and C)
F) A) and C)

Question 14

The image intensifier is located:

Accepted Answer

A)   next to the x-ray tube used for fluoroscopy
B)   beneath the x-ray table
C)   on a shelf just inside the room
D)   inside the fluoro towerE) None of the above
F) A) and C)

Question 15

If the input phosphor measures 30 cm and the output phosphor measures 2.5 cm,what is the minification gain?

Accepted Answer

A)   8.3
B)   12
C)   69.2
D)   144E) A) and C)
F) C) and D)

Question 16

Which of the following requires more radiation to produce quality fluoroscopic images?

Accepted Answer

A)   conventional image intensifier
B)   flat-panel detector in place of image intensifier
C)   there is no difference between the twoD) None of the above
E) B) and C)

Question 17

Which of the following require the x-ray beam to be in radiographic mode?

Accepted Answer

A)   cassette spot filming
B)   film cameras for spot filming
C)   videotape
D)   none of the aboveE) All of the above
F) B) and D)

Question 18

A typical high-resolution monitor has:

Accepted Answer

A)   825 lines
B)   1024 lines
C)   1872 lines
D)   2034 linesE) B) and C)
F) A) and D)

Question 19

When operated in magnification mode,the electrostatic lenses have ________ of a negative charge.

Accepted Answer

A)   less
B)   more
C)   the same amount as usual
D)   one halfE) B) and D)
F) A) and D)

Question 20

The electrostatic focusing lenses have a ___________ charge.

Accepted Answer

A)   negative
B)   positive
C)   neutral
D)   changingE) A) and B)
F) A) and C)

Exam 14: Image Intensified Fluoroscopy

Which of the following require the x-ray beam to be in radiographic mode?

Correct AnswerverifiedShow Answer

A loss of brightness around the edge of the fluoroscopic image caused by the curve of the photocathode is:

Correct AnswerverifiedShow Answer

Photoemission occurs at the:

Correct AnswerverifiedShow Answer

The conventional method for viewing the fluoroscopic image is by:

Correct AnswerverifiedShow Answer

Which of the following requires more radiation to produce quality fluoroscopic images?

Correct AnswerverifiedShow Answer

The gain related to the decrease in size from the input to the output phosphor is the:

Correct AnswerverifiedShow Answer

Which of the following has the possibility of demonstrating veiling glare and pincushion distortion?

Correct AnswerverifiedShow Answer

Early versions of digital fluoroscopy used the standard system and added:

Correct AnswerverifiedShow Answer

A typical high-resolution monitor has:

Correct AnswerverifiedShow Answer

The image intensifier improved fluoroscopy by:

Correct AnswerverifiedShow Answer

The image intensifier was introduced in the:

Correct AnswerverifiedShow Answer

The image intensifier is located:

Correct AnswerverifiedShow Answer

When operated in magnification mode,the electrostatic lenses have ________ of a negative charge.

Correct AnswerverifiedShow Answer

Typical television monitors have:

Correct AnswerverifiedShow Answer

This part of the image intensifier absorbs light and produces electrons.

Correct AnswerverifiedShow Answer

Which of the following accurately shows the energy sequence during fluoroscopy?

Correct AnswerverifiedShow Answer

The electrostatic focusing lenses have a ___________ charge.

Correct AnswerverifiedShow Answer

Which of the following degrades with age and has a lower DQE?

Correct AnswerverifiedShow Answer

The potential difference across the image intensifier is approximately:

Correct AnswerverifiedShow Answer

If the input phosphor measures 30 cm and the output phosphor measures 2.5 cm,what is the minification gain?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified