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Subtraction and Roadmap
Performing a subtraction scene
Contrast medium injected into the vessels
helps to show vessels and changes of/in
these vessels (e.g. aneurysms, ruptures).
Procedure
✧
Prepare the examination in the
Examination task card:
(1) Selection of the required application pro-
gram
(2) Selection of the Subtraction mode
✧
Trigger the subtraction scene with the left
footswitch or the hand switch.
The footswitch or hand switch must remain
pressed during the entire series. If the series
is interrupted, it must be started again from
the beginning.
(3) The syringe symbol appears in the
Examination task card. The physician
now injects the contrast medium.
➭
After a few seconds the syringe symbol
disappears again. The physician can end
the contrast medium injection. The con-
trast medium bolus remains displayed.
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