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Image
contrast/intensity
The Intensity and
contrast of a image series can be changed through the Change image
intensity / contrast dialog or by using the mouse wheel.
The
Scope
option determines if the intensity/contrast should be set for the current
image only or for all the images loaded in the active image window. Image
contrast and intensity is often referred to as window width (contrast) and window level (intensity)
in the MR world. For DICOM images, the window level and width are obtained
from the header, if available. If not, and for other image types, the
level/width are set according to the pixel range present in the image. The
range of pixel values may be read from the section called Image information . Note that any new
values entered for window level / width are not applied to the image until
the return button
is pressed. For
CT images, the window level/width can be set to preset CT values using the CT Presets
option. There
are additionally four available window/level presents which can be selected
using the User
defined presents option. The window/level values for these
presets are set in general options as described in Global settings. Related topics:
The
active image window
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