Siemens ARTIS 2 S Service Manual Page 338

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Image Viewing and Image Processing
DSA Postprocessing
74 / 112 AXA4-100.620.08.01.02 Operator Manual
Setting a new mask
During a DSA exposure, the mask (= image without contrast medium) is set au-
tomatically. This normally occurs after the second frame, but no later than after
two seconds.
You can change the automatically set mask image.
Default setting "Move Mask" or "Replace Mask"
Setting a new mask can be done via "Move Mask" or "Replace Mask".
Setting "Move mask"
u Select Options > Set Move Mask from the main menu.
"Move Mask" is active.
The next time you select the menu, the text of this item will be changed.
Setting "Replace Mask"
u Select Options > Set Replace Mask from the main menu.
"Replace Mask" is active.
The next time you select the menu, the text of this item will be changed.
Moving the mask
At the system console
u Click on this icon.
All pixelshift values are reset when you set a new mask.
For biplane scenes, this function is performed only in the active plane.
In the case of DYNAVISION scenes, only one mask image is usually available per
acquisition position (exception: washout scene).
The mask can therefore not be redefined for DYNAVISION scenes.
Prerequisite: "Move Mask" is configured.
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