Preparations; Dose Measurement; Calculating The Dose-Area Product - Siemens SIREMOBIL Iso-C Troubleshooting Manual

Adjustments / Programs

Preparations

Attach and center the center cross on the I.I.
Select survey format.
Select KV mA curve plateau HC1.
X
Release fluoroscopy briefly, adjusting the iris on the radiation field to a format of
approximately 8 cm. Do not make any further adjustments to the iris.
Record the diameter
Remove the center cross.
Attach and center the small (1 cm
the semiconductor detector (DIADOS) of the dose measurement device onto the image
intensifier
X
Release fluoroscopy briefly.
NOTE
Select kV STOP and enter 70 kV.

Dose measurement

Press the >0< key twice to reset the dose-area product on the SIREMOBIL monitor to 0.
Reset the dose measurement device (DALI, NOMEX, DIADOS, etc.) to 0.
X
Release fluoroscopy for approx. 20 seconds (~ 3 mGy). The measured dose K
be high enough that the uppermost measurement range of the dose measurement
device is utilized fully. If necessary, reset the dose-area product display on the SIRE-
MOBIL and the dose measurement device and repeat the measurement with a differ-
ent fluoroscopic time.
Record the measured dose.
Record the dose-area product displayed on the SIREMOBIL monitor (FDPa).

Calculating the dose-area product

To calculate the measured dose-area product:
(measured area dose product FDPg) = (measured dose K
© Siemens, 2008
For internal use only
((Fig. 26 / p. 70)) of the octagonal area of the radiation field.
3
((Fig. 25 / p. 70)).
The radiation field must cover the entire area of the dose
measurement chamber or semiconductor detector.
SPR2-230.840.01.01.02
08.08
((Fig. 24 / p. 70)).
) dose measurement chamber (DALI, NOMEX) or
E
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CS PS SP
should
E
2
) * (diameter) * 0.829
SIREMOBIL Iso-C
71
0
0
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