Question 1

The diameter of the output phosphor is approximately

Accepted Answer

A)  1 cm
B)  2.5 cm
C)  5 cm
D)  25 cm

Question 2

Which of the following is required in the indirect-capture detector?

Accepted Answer

A)  Amorphous silicon photodetector.
B)  Thin film transistor (TFT) array.
C)  A scintillator that uses cesium iodide or gadolinium oxysulfide as the phosphor.
D)  All of the above.

Question 3

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)  magnification

Question 4

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

Accepted Answer

A)  Input phosphor.
B)  Output phosphor.
C)  Photocathode.
D)  Electrostatic focusing lenses.

Question 5

The beam-splitting mirror is never used with fiberoptics.

Accepted Answer

A) True 
 B)False

Question 6

The formula to determine the amount of magnification created when in magnification mode,the formula is

Accepted Answer

A)  MF = full size input phosphor / selected input phosphor
B)  MF = full size input phosphor² / selected input phosphor²
C)  MF = selected input phosphor / full size input phosphor
D)  MF = selected input phosphor² / full size input phosphor²

Question 7

The fiberoptic bundle or optical lens system is used to

Accepted Answer

A)  deliver the image from the camera to the television monitor
B)  record the fluoroscopic image
C)  link the output phosphor and camera or CCD
D)  none of the above C

Question 8

This part of the image intensifier is made of cesium iodide.

Accepted Answer

A)  Input phosphor.
B)  Output phosphor.
C)  Photocathode.
D)  Accelerating anode. A

Question 9

Early versions of digital fluoroscopy used the standard system and added

Accepted Answer

A)  a different camera
B)  an analog-to-digital converter (AD
C)  
C)  videotape
D)  a digital-to-analog converter (DA
C)

Question 10

Its purpose is to convert the electronic signal from the camera tube or CCD into a visible image

Accepted Answer

A)  image intensifier
B)  fiberoptic bundle
C)  television monitor
D)  anode of the vidicon tube

Question 11

The ________________ is (are) found along the entire length of the image intensifier.

Accepted Answer

A)  input phosphor
B)  output phosphor
C)  photocathode
D)  electrostatic focusing lenses

Question 12

If a 30/23/15 cm image intensifier is operated in the 23-cm mode,the fluoroscopic image will be magnified by a factor of

Accepted Answer

A)  1.3
B)  1.5
C)  1.7
D)  2

Question 13

The newest fluoroscopy systems use a flat-panel detector

Accepted Answer

A)  to record the spot images during fluoroscopy
B)  to record the overhead images following fluoroscopy
C)  in place of the image intensifier
D)  in addition to the image intensifier

Question 14

Performance quality control testing should be done by a

Accepted Answer

A)  radiographer
B)  medial physicist
C)  radiologist
D)  student radiographer

Question 15

Each electron that interacts with the output phosphor results in significantly fewer light photons being produced in comparison with the number of light photons it took to release that electron.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following contains a thin layer of pixels instead of a liquid crystal layer,with each pixel containing three neon and xenon gas-filled cells?

Accepted Answer

A)  Cathode ray tube monitor.
B)  Liquid crystal display (LC
D)  monitor.
C)  Plasma monitor.
D)  Radiographic film.

Question 17

A typical high-resolution monitor has

Accepted Answer

A)  825 line systems
B)  1024 line systems
C)  525 line systems
D)  2034 line systems

Question 18

Photoemission occurs at the

Accepted Answer

A)  input phosphor
B)  output phosphor
C)  photocathode
D)  accelerating anode

Question 19

The diameter of the input phosphor typically measures between

Accepted Answer

A)  5 and 10 cm
B)  15 and 30 cm
C)  40 and 65 cm
D)  75 and 100 cm

Question 20

The image intensifier was introduced in the

Accepted Answer

A)  1920s
B)  1950s
C)  1970s
D)  1980s B

Exam 14: Image Intensified Fluoroscopy

The diameter of the output phosphor is approximately

Correct AnswerverifiedShow Answer

Which of the following is required in the indirect-capture detector?

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

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

Correct AnswerverifiedShow Answer

The beam-splitting mirror is never used with fiberoptics.

Correct AnswerverifiedShow Answer

The formula to determine the amount of magnification created when in magnification mode,the formula is

Correct AnswerverifiedShow Answer

The fiberoptic bundle or optical lens system is used to

Correct AnswerverifiedC

This part of the image intensifier is made of cesium iodide.

Correct AnswerverifiedA

Early versions of digital fluoroscopy used the standard system and added

Correct AnswerverifiedShow Answer

Its purpose is to convert the electronic signal from the camera tube or CCD into a visible image

Correct AnswerverifiedShow Answer

The ________________ is (are) found along the entire length of the image intensifier.

Correct AnswerverifiedShow Answer

If a 30/23/15 cm image intensifier is operated in the 23-cm mode,the fluoroscopic image will be magnified by a factor of

Correct AnswerverifiedShow Answer

The newest fluoroscopy systems use a flat-panel detector

Correct AnswerverifiedShow Answer

Performance quality control testing should be done by a

Correct AnswerverifiedShow Answer

Each electron that interacts with the output phosphor results in significantly fewer light photons being produced in comparison with the number of light photons it took to release that electron.

Correct AnswerverifiedShow Answer

Which of the following contains a thin layer of pixels instead of a liquid crystal layer,with each pixel containing three neon and xenon gas-filled cells?

Correct AnswerverifiedShow Answer

A typical high-resolution monitor has

Correct AnswerverifiedShow Answer

Photoemission occurs at the

Correct AnswerverifiedShow Answer

The diameter of the input phosphor typically measures between

Correct AnswerverifiedShow Answer

The image intensifier was introduced in the

Correct AnswerverifiedB

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B