Siemens ARCADIS Varic, Operator'S Manual, Page: 236 / 476

Operator Manual
34
of 78
SPR2-310.620.30.02.02
Image Processing
Windowing images
0
Imaging methods provide information in the form of gray scale images with up to
several thousand different gray scale values. Windowing means to emphasize
the range of gray scales of the relevant area and tissue type.
The first step in windowing therefore consists in determining the window center,
i.e. the gray value of the tissue type that is central to your diagnostic problem.
The smaller the window center, the brighter the image.
With the window width, you define how many gray scale values above and below
the center value you want to see. The smaller the window width, the higher the
contrast.
Windowing of color images is not possible.
Displaying window
values
You can see the window values set in the bottom right-hand corner of the images.
(1) W: Window width – Contrast
(2) C: Window center – Brightness
Assigning fixed window settings (LUTs)
0
Some imaging methods allow you to display images with alternative window set-
tings using LUTs (lookup tables).
The currently selected LUT is displayed at the bottom right of the image (with dis-
play of window values).
◆
Select the images that are to be assigned a different LUT.
◆
Click the LUT Previous - or LUT Next + button on the Image subtask card.