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Intensity Scale
These commands are used change the intensity scale for viewing the image.
These commands do not change the image data. When the minimum value is
set, then the color pure black is assigned to that image value. Similarly,
when the maximum value is set, the the color pure white is assigned to that
image value.
Changing the intensity scale is useful when examining different image features.
In clinical medicine, the intensity scale is often changed to examine bone
(high value) versus soft-tissue (medium value) features.