Siemens MAMMOMAT Novation DR - Checks with a Large Focus and Without AEC; Checks with a Small Focus and Without AEC

46 X-ray tube checks
MAMMOMAT Novation DR SPB7-250.815.06.02.02 Siemens AG
12.05 CS SD 24
Page 46 of 116
Medical Solutions
Checks with a large focus and without AEC 0
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.
Tab. 7 Checks with a large focus and without AEC
• Cover the detector with the large steel plate or with a lead apron.
Test performance
1. Select the Examination tab card and load a patient for examination
NOTE
Depending on when a detector gain calibration was performed the
last time, it may be required to be perform the detector gain cali-
bration at this point. You may only then continue with these mea-
surements. For more details on how to perform the gain
calibration, see "Gain calibration", on (Gain calibration / p. 72).
2. Adjust the exposure value on the control console according to the table above.
X 3. Start an exposure.
4. 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 5. Record the measured kV and mAs value in the "Start-up Protocol" on (Start-up
Protocol / p. 97).
6. Change the setting and continue with the next measurement until you have completed
all measurements from the table above.
Checks with a small focus and without AEC 0
NOTE
The magnification table is only shipped with the system when the
customer had ordered this option.
Measurement kV mAs Anode/Filter
13020Mo/Mo
23020W/Rh
335100Mo/Mo
4 35 100 W/Rh
525100Mo/Mo
6 25 100 W/Rh