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