Siemens AG SPR2-310.842.01.07.02 ARCADIS Varic / Orbic
12.06 CS SD 24
Adjustments 29
Page 29 of 34
Medical Solutions
Dose rate adjustment 2.10
Explanation of the status bar during the “Dose Rate Adjustment”.
Prerequisites
The grid remains on the I. I.
Filter for X-ray tube output is 2.7 mm Cu or alternatively 25 mm Al and 1.2mm Cu.
Dose rate correction factors
NOTE
Make sure to use the correct "dose rate correction factors," based
on the chamber used.
Correction factor for the small dose measurement chamber is 1.00.
Correction factor for the large dose measurement chamber is 1.06.
Grid correction factor is 1.50.
Correction factor with large chamber and grid is 1.59.
Dose rate 23 cm I.I. with grid
Auto Regulation Indicates the current status of the automatic adjustment.
(NOT READY / NOT ACTIVE / ACTIVE / DONE / STOP flu-
oroscopy)
Brightness Deviation Shows the difference in the actual brightness value minus
the nominal brightness value.
Control Curve Shows the currently selected fluoro curve. DA CFC 75 kV
is used for dose rate adjustment.
Adjustment Shows the operating control mode.
(Generator / Camera Iris / Stop)
I.I. Zoom Status Shows the current I.I. format (full format / zoom)
Dose rate Shows the dose rate selected.
(LOW / MID / HIGH)
TV -Iris Actual Position Shows the actual TV iris value.
TV -Iris Nominal Value Shows the stored or nominal TV iris value from the learn-
ing phase.
For doserate "LOW", the brightness deviation value can be
higher than 0 ± 10 and also the resulting dose can be
higher.
For dose rate "MID" and "HIGH" brightness, the deviation
value should be 0 ± 10.
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