Term
| similar to conventional fluoroscopy but with addition of computer, multiple monitors, and more complex operating console |
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Definition
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Term
| obtained by pulsing the xray beam in a manner called pulse-progresive fluoroscopy |
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Definition
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Term
a pixelated unit with a photodiode connected to each pixel element
replaces the image intensifier from conventional fluoro system
also referred as Flat Panel Image Receptors |
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Definition
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Term
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Definition
| converts light from the output screen to an electonic signal |
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Term
| TFT is made of ____ to increase sensitivity |
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Definition
| cesium iodine scintillator |
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Term
| a material that emits light when exposed to ionizing radiation |
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Definition
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Term
| advantages of FPIR over conventional fluoroscopy |
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Definition
smaller, lighter, more easily manipulated
response is more uniform and doesnt degrade with age, reducing pincushion and veiling glare |
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Term
| disadvantages of FPIR over conventional fluoroscopy |
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Definition
resolution cannot be as high
higher patient dose to acheive high resolution |
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Term
a semiconducting device capable of storing a charge from light photons and stiking a photosensitive surface
stores free electrons in latent image form |
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Definition
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Term
| takes light from input image intensifier screen and changes them into electrons |
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Definition
| CCD Charged coupled device |
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Term
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Definition
| extremely fast discharge time (images show up right away) |
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Term
receives output signal from image intensified digital recdeptor
accepts the analog signal and digitizes it and stores it |
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Definition
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Term
| to be compatible with the computer, ADC must have the same _____ as the DF system |
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Definition
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Term
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Definition
| takes electrons from CCD, digitizes, then stores them |
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Term
| two types of flat panel detectors |
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Definition
| direct selenium and indirect silicon |
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Term
a semi conductor with excellent photon detection and spatial resolution
uses a high voltage charge
one step |
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Definition
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Term
has a low atomic number which requires a thick layer of silicon for adequate sensitivity
uses a scintillator to reduce spatial resolution
two step |
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Definition
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Term
rapidly replacing CRT in fluoroscopy
revieves signal from CCD or flat panel detector |
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Definition
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Term
| advantages of Flat Panel Display |
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Definition
easier to view and manipulate
better images
readily mounted |
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Term
| vidicon and plumbicon tubes |
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Definition
| work on cathode and anode concept |
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Term
consists of heating assembly that forms a gun and shapes the beam using a control grid
sends electrons toward the anode |
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Definition
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Term
II tube is coupled with the face plate of the vidicon and the fiber optics
transmits light and an electronic signal from the tube |
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Definition
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Term
| anode target is made of this |
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Definition
| insulating mica coating in which globules of a light sensitive photoconductive material are suspended |
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Term
consists of a vacuum tube
electron gun (cathode)
anode (plated onto front screen)
image creation (gun sprays pulse stream of electrons)
phophor crystals emit light |
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Definition
| Cathode Ray Tube video monitor |
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Term
| two dynamic recording systems |
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Definition
cinefilm systems
video recorders (VCR) |
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Term
dynamic recording system
has a cinecamera positioned to intercept images produced by output screen of intensifying screen
requires about 90% of the image intensity for proper exposure levels
works by recording a series of images at high speeds and perceives them as single images |
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Definition
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Term
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Definition
| uses both 16 and 35 mm formats |
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Term
| cinefilm systems produce at ___ or ___ frames per second with a ___ Hz rectified current |
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Definition
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Term
| cinefilm viewed at ___ frames per second to percieve smooth motion |
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Definition
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