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Bushong Chapter 26

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Digital Fluoroscopy Bushong 26

Question 1 of 11

1

What are the advantages of digital fluoroscopy over conventional fluroscopy?

Select one or more of the following:

  • Speed of image acquisition

  • Speed of postprocessing

  • Enhanced image contrast

  • Decrease patient dose

Explanation

Question 2 of 11

1

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Digital fluoroscopy's tube current is measured in hundreds of mA instead of less than ( 5, 10, 1, 20 ) mA, as in image-intensifying fluoroscopy.

Explanation

Question 3 of 11

1

What is interrogation time?

Select one of the following:

  • The time required for the x-ray tube to be switched on and reach selected levels of kilovolt peak (kVp) and mA.

  • The time required for the x-ray tube to be switched off.

  • The fraction of time that the x-ray tube is energized.

Explanation

Question 4 of 11

1

Duty cycle is the time required for the x-ray tube to be switched off.

Select one of the following:

  • True
  • False

Explanation

Question 5 of 11

1

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Pulse progressive fluoroscopy is ( reduces, increases ) patient radiation dose.

Explanation

Question 6 of 11

1

The sensitive component of a CCD is a layer of crystalline silicon.

Select one of the following:

  • True
  • False

Explanation

Question 7 of 11

1

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( Progressive mode, Interlaced mode ) produces a sharper image with less flicker than ( interlaced mode, progressive mode ).

Explanation

Question 8 of 11

1

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( Mask mode, Temporal subtraction, Hybrid subtraction, Time-interval difference (TID) mode, Energy subtraction ): Method of temporal subtraction that results in successive subtraction images of contrast-filled vessels.
( Temporal subtraction, Mask mode, Hybrid subtraction, Time-interval difference (TID) mode, Energy subtraction ): Computer-assisted technique whereby an image obtained at one time is subtracted from an image obtained at a later time.
( Hybrid subtraction, Mask mode, Temporal subtraction, Time-interval difference (TID) mode, Energy subtraction ): Technique that combines two types of subtraction.
( Time-interval difference (TID) mode, Mask mode, Temporal subtraction, Hybrid subtraction, Energy subtraction ): Technique that produces subtracted images from progressive masks and the frames that follow.
( Energy subtraction, Mask mode, Temporal subtraction, Hybrid subtraction, Time-interval difference (TID) mode ): Technique that takes advantage of changing contrast media during the time of the examination and require no special demands on the high-voltage generator. Uses two different x-ray beams alternately to provide a subtraction image that results from differences in photoelectric interaction.

Explanation

Question 9 of 11

1

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( Conventional, Digital ) fluoroscopy: Images generated directly from x-ray
( Digital, Conventional ) fluoroscopy: Images produced by pulse-progressive fluoroscopy

Explanation

Question 10 of 11

1

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In conventional fluoroscopy:
- The input phosphor converts ( x-rays, photons, electrons ) into light
- ( Photocathode, Image intensifier, CCD ) converts light into electrons
- Output phosphor converts ( electrons, photons, x-rays ) back into light

Explanation

Question 11 of 11

1

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In digital fluoroscopy:
- x-rays are converted to ( light, electrons, photons, energy ) by a(n) ( image intensifier, input phosphor, output phosphor )
- ( light, x-ray, electrons, photons ) is converted to electrical signal by CCD

Explanation

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