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Explain why the ability to perform digital
processing of radiographic images is a significant advantage.
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Identify the quality characteristics of medical
images that can be changed by digital processing.
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Describe the general relationship between image
contrast and pixel values.
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Describe the general process of changing image
contrast by using look up tables (LUT).
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Describe and illustrate how the contrast
characteristics produced by LUT processing can be represented by graphs.
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Draw and explain graphs comparing LUT processing
that produces different image contrast characteristics.
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Describe how LUT processing can produce an image
with an inverted brightness scale.
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Briefly describe the possible advantages of
viewing radiographs in the inverted form.
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Identify the operator controlled functions on a
digital radiography system that selects a specific LUT for image processing.
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Draw a simple scale representing the range of
pixel values in a recorded digital image and use it to illustrate and describe
the process of windowing.
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Define and illustrate the concepts of window
center and window width.
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Describe the general relationship between window
with and the contrast in a displayed image.
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Describe a possible clinical advantage of
changing window level (center) when viewing an image.
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Briefly describe the image contrast
characteristics in the three segments or regions of the pixel value scale
produced by the window.
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Describe how the process of blurred (un-sharp)
mask subtraction can increase the visibility of detail in images.
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Identify some clinical applications in which the
blurred mask subtraction process might be useful.
