Digital Fluoroscopy Bushong 26

Description

Bushong Chapter 26
Korie Hi
Quiz by Korie Hi, updated more than 1 year ago
Korie Hi
Created by Korie Hi almost 7 years ago
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Resource summary

Question 1

Question
What are the advantages of digital fluoroscopy over conventional fluroscopy?
Answer
  • Speed of image acquisition
  • Speed of postprocessing
  • Enhanced image contrast
  • Decrease patient dose

Question 2

Question
Digital fluoroscopy's tube current is measured in hundreds of mA instead of less than [blank_start]5[blank_end] mA, as in image-intensifying fluoroscopy.
Answer
  • 5
  • 10
  • 1
  • 20

Question 3

Question
What is interrogation time?
Answer
  • 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.

Question 4

Question
Duty cycle is the time required for the x-ray tube to be switched off.
Answer
  • True
  • False

Question 5

Question
Pulse progressive fluoroscopy is [blank_start]reduces[blank_end] patient radiation dose.
Answer
  • reduces
  • increases

Question 6

Question
The sensitive component of a CCD is a layer of crystalline silicon.
Answer
  • True
  • False

Question 7

Question
[blank_start]Progressive mode[blank_end] produces a sharper image with less flicker than [blank_start]interlaced mode[blank_end].
Answer
  • Progressive mode
  • Interlaced mode
  • interlaced mode
  • progressive mode

Question 8

Question
[blank_start]Mask mode[blank_end]: Method of temporal subtraction that results in successive subtraction images of contrast-filled vessels. [blank_start]Temporal subtraction[blank_end]: Computer-assisted technique whereby an image obtained at one time is subtracted from an image obtained at a later time. [blank_start]Hybrid subtraction[blank_end]: Technique that combines two types of subtraction. [blank_start]Time-interval difference (TID) mode[blank_end]: Technique that produces subtracted images from progressive masks and the frames that follow. [blank_start]Energy subtraction[blank_end]: 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.
Answer
  • Mask mode
  • Temporal subtraction
  • Hybrid subtraction
  • Time-interval difference (TID) mode
  • Energy subtraction
  • Temporal subtraction
  • Mask mode
  • Hybrid subtraction
  • Time-interval difference (TID) mode
  • Energy subtraction
  • Hybrid subtraction
  • Mask mode
  • Temporal subtraction
  • Time-interval difference (TID) mode
  • Energy subtraction
  • Time-interval difference (TID) mode
  • Mask mode
  • Temporal subtraction
  • Hybrid subtraction
  • Energy subtraction
  • Energy subtraction
  • Mask mode
  • Temporal subtraction
  • Hybrid subtraction
  • Time-interval difference (TID) mode

Question 9

Question
[blank_start]Conventional[blank_end] fluoroscopy: Images generated directly from x-ray [blank_start]Digital[blank_end] fluoroscopy: Images produced by pulse-progressive fluoroscopy
Answer
  • Conventional
  • Digital
  • Digital
  • Conventional

Question 10

Question
In conventional fluoroscopy: - The input phosphor converts [blank_start]x-rays[blank_end] into light - [blank_start]Photocathode[blank_end] converts light into electrons - Output phosphor converts [blank_start]electrons[blank_end] back into light
Answer
  • x-rays
  • photons
  • electrons
  • Photocathode
  • Image intensifier
  • CCD
  • electrons
  • photons
  • x-rays

Question 11

Question
In digital fluoroscopy: - x-rays are converted to [blank_start]light[blank_end] by a(n) [blank_start]image intensifier[blank_end] - [blank_start]light[blank_end] is converted to electrical signal by CCD
Answer
  • light
  • electrons
  • photons
  • energy
  • image intensifier
  • input phosphor
  • output phosphor
  • light
  • x-ray
  • electrons
  • photons
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