first 50 Image Acquisition

  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



    D low contrast
  3. The instrument that is used frequently in quality-control programs to measure varying degrees of x-ray exposure is the



    B densitometer.
  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



    C 1, 2, and 3
  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:



    D Excessive windowing
  8. Incorrect spectral matching between rare earth intensifying screens and film emulsion results in



    B insufficient density.
  9. A change from 400-speed screens to 200-speed screens would require what change in milliampere-seconds?



    C mAs should be doubled.
Author
Mariyah
ID
306380
Card Set
first 50 Image Acquisition
Description
Rad Review Easy
Updated