Checks With A Large Focus And Without Aec - Siemens MAMMOMAT Novation DR Installation Manual

X-ray tube checks

Checks with a large focus and without AEC

Prerequisites
•
Deselect D and H on the control console, the MAMMOMAT is in mAs mode without AEC.
•
Make sure the magnification table is removed, so that a large focus is selected.
•
The check has to be performed for each measurement of the table.
Measurement
Tab. 1
•
Cover the detector with the large steel plate or with a lead apron.
Test performance
1.
2.
3.
4.
5.
Siemens AG
Medical Solutions
kV
1 30
2 30
3 35
4 35
5 25
6 25
Checks with a large focus and without AEC
Adjust the exposure value on the control console according to the table above.
Start an exposure.
Check and measure the kV value and the tube current characteristic on the
oscilloscope.
The accuracy of the kV is &5%, for tube current &10% and for the mAs product
&10%.
Record the measured kV and mAs value in the "Startup Protocol" on Page 11 - 1
.
Change the setting and continue with the next measurement until you have
completed all measurements from the table above.
mAs
20
20
100
100
100
100
SPB7-250.815.02
Rev. 02 09.04
Anode/Filter
Mo/Mo
W/Rh
Mo/Mo
W/Rh
Mo/Mo
W/Rh
MAMMOMAT Novation
Page 3 of 6
CS SD 24
6 - 3
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DR
System