Siemens SIREMOBIL Iso-C SP Installation And Setting Instructions Manual - Page 15
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Area dose product measurement device
Preparations
•
Attach and center the center cross on the I.I. (Fig. 4).
•
Select survey format.
•
Select KV mA curve plateau HC1.
•
Attach and center the small (1cm
measurement device (Dali, Nomex ...) or the semiconductor detector (Diados) onto the
image intensifier (Fig. 5).
•
Release fluoroscopy briefly, adjusting the iris on the radiation field to a format of
approximately 15 cm.
NOTE
•
Do not make any further adjustments to the iris.
•
Record the diameter (Fig. 6) of the octagonal area of the radiation field.
•
Remove the center cross.
•
Select kV STOP and enter 70 kV.
Dose measurement
•
Press the >0< key twice to reset the area dose product on the Siremobil monitor to 0 .
•
Reset the dose measurement device (Dali, Nomex ...) to 0 .
•
Release fluoroscopy several seconds. The measured dose K
that the uppermost measurement range of the dose measurement device is utilized fully;
if necessary, reset the area dose product display on the Siremobil and the dose
measurement device and repeat the measurement with a different fluoroscopic time.
•
Record the measured dose.
•
Record the area dose product displayed on the Siremobil monitor (FDPa).
Calculating the area dose product
•
To calculate the measured area dose product :
(measured area dose product FDPg) = (measured dose K
Evaluation
Calculate the deviation between the measured area dose product and the displayed area
dose product:
The deviation must be < 0.3 .
Deviation = [(displayed area dose product FDPa) - (measured area dose product FDPg) ]
/ (measured area dose product FDPg)
For deviations > 0.3 , the area dose product measurement device must be replaced.
Siemens AG
Medical Engineering
3
) dose measurement chamber of the dose
The radiation field must cover the entire area of the dose mea-
surement chamber respectively the semiconductor detector of the
dose measurement device.
SPR2-230.033.04
Rev. 03
) * (diameter)
E
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06.05
CS PS 24
should be high enough
E
2
* 0.829
SIREMOBIL Iso-C
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