Siemens ARTIS 2 S Service Manual Page 165

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System Operation
Image Format, Collimation and Filtration
AXIOM Artis AXA4-100.620.08.01.02 59 / 94
Setting the collimators
Depending on the system configuration, your system can be equipped with dif-
ferent primary collimators. Consequently the collimator control module comes in
different versions.
Part System Overview / Operating Elements, Chapter Operating Ele-
ments and Displays in the Examination Room, “Collimator versions”
Rectangular and iris collimation
The collimator limits the radiation field to the region of interest (organ) or the max-
imum input field corresponding to the zoom stage.
Speed The speed of the collimator leaves depends on how far you tilt the joystick: max-
imum speed with maximum tilt.
The system controls the speed so that the speed on the monitor does not de-
pend on the zoom stage selected.
Check/select plane (Artis dBC/dBA only)
The last plane in which fluoroscopy was performed is automatically selected.
u If necessary, press the A/B key on the collimator control module.
The LED of the selected plane lights up.
The behavior of the collimation when changing the zoom stage can be config-
ured in different manners.
Please ask Siemens Service.
When changing the SID (source to image distance) by raising/lowering the FD,
the collimation is automatically adjusted in order to keep the beam limited to the
selected field size.
If the c-arm is positioned in the range of ±15° LAO/RAO and ±15° CRAN/CAUD,
when changing the SOD (source to object distance) by raising/lowering the pa-
tient table, the collimation is automatically adjusted in order to keep the collimat-
ed field size in the object plane constant.
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