first 50 Image Acquisition

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Mariyah
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306380
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first 50 Image Acquisition
Updated:
2015-08-13 23:36:41
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Rad Review Easy
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  1. “Saturation” of an image in CR means that:
    A The CR reader has difficulty converting insufficient exposure signals to produce a diagnostic image; all electronic enhancement mechanisms are maximized B Beyond a certain exposure level, a large number of pixels will be at maximum digital value (black), resulting in loss of visibility of anatomical structures in that region. C There is a large amount of scatter radiation that is contributing to loss of anatomical image detail due to loss of contrast, thus decreasing diagnostic quality of the image D The CR image reader has adequately, and completely, read all the exposure intensities from the pixels resulting from the exposure
    B Beyond a certain exposure level, a large number of pixels will be at maximum digital value (black), resulting in loss of visibility of anatomical structures in that region.
  2. A film emulsion having wide latitude is likely to exhibit
    A high density 
    B high contrast 
    C low contrast
    D low density 
    C low contrast
    (this multiple choice question has been scrambled)
  3. The instrument that is used frequently in quality-control programs to measure varying degrees of x-ray exposure is the
    A aluminum step wedge. 
    B spinning top. 
    C densitometer. 
    D sensitometer.
    C densitometer.
    (this multiple choice question has been scrambled)
  4. These densities may be measured and given a numeric value with a device called a _____.
    densitometer
  5. Base-plus fog is a result ofblue-tinted film basechemical developmentthe manufacturing process
    A 1, 2, and 3
    B 1 and 3 only 
    C 1 only 
    D 1 and 2 only 
    A 1, 2, and 3
    (this multiple choice question has been scrambled)
  6. Exposed silver halide crystals are changed to black metallic silver by theA preservative B reducers C activators D hardener
    B reducers
  7. Histogram data that is skewed relative to the values of interest (VOI) of the histogram analysis used for a particular exam may be caused by all of the following, except:
    A Anatomical structures not centered to the IP 
    B Excessive windowing 
    C The X-ray beam is not correctly aligned to the edges of the IP 
    D The beam edge is irregular because of overlap of a radiopaque shadow, such as a gonadal shield
    B Excessive windowing
    (this multiple choice question has been scrambled)
  8. Incorrect spectral matching between rare earth intensifying screens and film emulsion results in
    A decreased recorded detail. 
    B longer-scale contrast. 
    C insufficient density. 
    D excessive density.
    C insufficient density.
    (this multiple choice question has been scrambled)
  9. A change from 400-speed screens to 200-speed screens would require what change in milliampere-seconds?
    A mAs should be increased by 30%. 
    B mAs should be halved.
    C mAs should be increased by 15%. 
    D mAs should be doubled. 
    D mAs should be doubled.
    (this multiple choice question has been scrambled)

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