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13 Cards in this Set
- Front
- Back
Define Digital Imaging.
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Any imaging acquisition process that produces and an electronic image that can be viewed and manipulated on a computer.
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What is the latent image formation for conventional imaging?
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Xrays strike and intensifying screen, light is emitted, and film exposed to light
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Compare the latent image formation for conventional imaging with cassette-based digital radiography.
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CONVENTIONAL - x-rays strike intensifying screen; light is emitted, and film is exposed to light CASSETTE - X-rays strike phosphor plate. X-ray energy deposited in the phosphor; energy is released from phosphor when stimulated by light in reader
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How is the latent image formed when using cassette-less digital radiography?
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X-rays strike the detector. INDIRECT phosphor emits light; photodetector (silicon and TFT) detects light and converts to electrical pulse. DIRECT X-rays detected by photoconductor and converted to electrical signals.
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What does the acronym PACS stand for, and what are its uses?
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Picture Archival and Communication System; consists of digital acquisition, display workstations and storage devices interconnected through a network
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What does the acronym DICOM stand for, and how is it used?
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digital imaging and communications in medicine; it is a global information technology standard that allows network communication between modality and PACS
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Computed Radiography (CR)
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cassette-based digital radiography is the digital acquisition modality that uses storage phosphor plates to produce projection images
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DICOM
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digital imaging and communications in medicine; it is a global information technology standard that allows network communication between modality and PACS
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Digital Imaging
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Any imaging acquisition prcoess that produces an electronic image that can be viewed and manipulated on a computer
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Digital Radiography (DR)
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or cassett-less systems use an x-ray absorber material coupled to a flat panel detector or a charged-coupled device to form the image.
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Direct capture digital radiography
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these devices convert the incident x-ray energy direc tly into an electrical signal, typically using a photoconductor as the x-ray absorber, and a thin-film transistor as the signal collection area, and send the electrical signal to the computer for processing and viewing
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Indirect capture digital radiography
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devices that absorb x-rays and convert them into light; the light is then detected by an area-charge-coupled device or thin film-transistor array in concert with photodiodes and then converted into an electrical signal that is sent to the computer for processing and viewing.
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Teleradiology
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moving images via telephone lines to and from remote locations
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