LITHOSTAR Multiline
RXL2-120.815.01
Page 12 of 18
Siemens AG
System manual
Rev. 02
02.05
CS PS 24
Medical Solutions
6 - 12
Checking the Dose Rate
D. Setting the Water Equivalent Take Over
6
•
Select
Water Equivalent
in the "Polydoros .. -Service/Adjustment/" window.
Preparation (measurement configuration)
6
•
Fill a phantom with exactly 20 cm of water and position it in the beam.
•
Select the I.I. full field view format.
•
Switch
ON
fluoroscopy in the "Water Equivalent" window.
•
Select the
"Start-Button"
to calculate the new correction factor. Fluoroscopy will be
switched off again.
¹
The system must set 70 kV + 1.5/-2 kV as the exposure voltage.
•
Select
OK
to save the correction factor and exit the Water Equivalent window.
E. Setting the maximum Skin Dose Rate
6
•
Refer to chapter 6 of the Start-Up Instructions RXL2-120.034.02... for the settings/tests.
•
Ensure compliance with country-specific regulations when setting the maximum
acceptable values.
•
If such regulations
do not
apply
, enter "SS"
OFF
in this window.
•
Set
18 mA
for 110 kV and 70 kV.
F. DR Snapshot (optional)
6
Checking the dose / image
6
When checking the dose/ image, the tube housing cover must be installed and the Uro
insert removed.
•
Insert the 2.1 mm precision radiation filter in the collimator, select 70 kV.
Remarks:
The nominal values do not include the attenuation of the measurement chamber and the
grid. The following values should be measured.
In case of deviations, perform the dose rate setting for DR in accordance with pages 6-13
through 6-16.
This setting should be performed only in countries which man-
date a limitation of the skin dose rate.
- Where DHHS regulations apply for: Normal Fluoroscopy
9 R/min (1305 nGy/s)
High-Contrast Fluoro
18 R/min (2610 nGy/s)
Zoom level Nominal value w/o grid (nGy/s)
Measured value with grid
(nGy/s)
Full format
278
461
Zoom 1
640
1062
Zoom 2
1056
1753
Zoom 3
1056
1753
NOTE
