Siemens MAMMOMAT Novation DR - Checks with a Large Focus and with AEC

Siemens AG SPB7-250.815.06.02.02 MAMMOMAT Novation DR
12.05 CS SD 24
X-ray tube checks 47
Page 47 of 116
Medical Solutions
Prerequisites
• Make sure the magnification table is mounted so that a small focus is selected.
• Deselect D and H on the control console; the MAMMOMAT is in mAs mode without
AEC.
• The check has to be performed for each measurement of the table.
Tab. 8 Checks with a small focus and without AEC
• Cover the detector with the large steel plate or with a lead apron.
Test performance
1. Adjust the exposure value on the control console according to the table above.
X 2. Start an exposure.
3. Check and measure the kV value and the tube current characteristic on the oscillo-
scope. The accuracy of the kV is ±5%, for tube current ±10% and for the mAs product
±10%.
P 4. Record the measured kV and mAs value in the "Start-up Protocol" on (Start-up
Protocol / p. 97).
5. Change the setting and continue with the next measurement until you have completed
all measurements from the table above.
Checks with a large focus and with AEC 0
NOTE
Be aware that with the AEC mode on, a pre-exposure of 50 ms is
done.
Select the correct trigger on the scope so you get the pre-exposure
and all the exposure times.
Prerequisites
• Remove the lead apron from the detector.
• Mount the collimator mounted plexi phantom.
• Register a patient.
• Make sure the magnification table is removed so that a large focus is selected.
• Select H on the control console; the MAMMOMAT is in now in AEC mode.
• The check has to be performed for each measurement of the table.
Measurement kV mAs Anode/Filter
13010Mo/Mo
23010W/Rh