Setting The Maximum Skin Dose Rate; Prerequisites; Preparations; Measurement - Siemens SIREMOBIL Iso-C Service Instructions Manual

Adjustments / Programs

Setting the maximum skin dose rate

NOTE

Prerequisites

•
You must program one of the FL curves S2, HC2 or IODINE.
•
The FL curves S2, HC2 or IODINE should be used for the following adjustment.
•
The X-ray tube cover must be installed.
•
Use the dose ionization chamber of the dose measurement device to measure dose
rates greater than 10R/min.
•
If you are using an area dose product measurement device, mount the dose measure-
ment chamber above the radiation exit port of the SIREPHOS.

Preparations

•
Attach the dose ionization chamber
at a distance of 30 cm from the I.I.
housing (Fig. 2).
•
Select one of the FL curves S2 / HC2
or IODINE according to the program-
ming. (Push-key)
•
Briefly release fluoro.
•
Select kV stop mode and enter
110 kV (5 mA).
NOTE

Measurement

•
Switch on fluoroscopy.
•
Read and record the value displayed on the dose rate meter.
•
If the value measured exceeds 9 R/min, the maximum tube current must be reduced. If
the value measured is less than 9 R/min, the tube current does not need to be reduced.
•
Switch fluoroscopy off.
Siemens AG
Medical Solutions
Setting the maximum skin dose rate is necessary only for coun-
tries where DHHS regulations apply.
5
If the maximum tube current was already reduced, the mA value
displayed at 110kV should be recorded and used for the calcula-
tion. The maximum skin dose rate to be set should equal 9R/min.
SPR2-230.061.01
Rev. 13
30 cm
Chamber
Sirephos
Fig. 2
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