ch9.txt

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Author:
Anonymous
ID:
20169
Filename:
ch9.txt
Updated:
2010-05-21 11:39:22
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rad190
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ch9
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  1. Standard format for medical images computer files that can be transferred from picture archiving system to another.
    DICOM
  2. Does not use a darkroom nor a cassette.
    Direct or Digital Radiography
  3. Information arranged in a series of rows and columns.
    Matrix
  4. Used in digital imaging to determine whether the exposure received by the image receptor was in the appropriate range.
    Exposure Index or Indicator
  5. Allows image to show either soft tissue or bone or both.
    Dual Energy Subtraction
  6. A picture element.
    pixel
  7. Software used to store medical images and share information between various sources.
    PACS
  8. An increase in _________ results in smaller pixel size and increased spatial resolution.
    Matrix
  9. Uses a photostimulable phosphor plate in a cassette.
    Computed Radiography
  10. Currently most expensive type of imaging equipment to purchase.
    Direct or Digital Radiography
  11. Utilizes amorphous selenium or silicon to convert x-ray energy to an electrical charge.
    Direct or Digital Radiography
  12. Uses a reader that scans the phosphor plate with a laser light.
    Computed Radiography
  13. ______________ refers to the tendency for technologists to use higher exposure settings when using digital radiographic imaging.
    dose creep
  14. ______________ occurs when insufficient exposure factors are used in digital imaging resulting in a mottled image appearance.
    image noise
  15. _____________ is the principle that exposure settings should result in radiation dose that is As Low As Reasonably Achievable.
    ALARA
  16. Digital receptors provide a wide range of exposure latitude when compared with film-screen systems.
    true
  17. Image Noise is more likely to occur when using 0.5 mAs at 60 kVp than when using 4 mAs at 60 kVp for a foot.
    true
  18. Using digital imaging result in fewer rejected images for reasons of over- and under- exposure.
    true

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