Collimator Adjustment 7 - 3
Siemens AG SPB7-250.815.02 Page 3 of 6 MAMMOMAT
Novation
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Medical Solutions Rev. 02 09.04 CS SD 24 System
2. Start the service software Service PC and select
Configuration -> Collimator -> Calibration of beam field
3. Enter the numbers in the table below:
4. Narrow the X-ray field so that the edges of the detector will not be exposed with X-
ray. As a consequence white lines are visible in the image, at the edges of the de-
tector.
To do so, decrease the YC value and increase the YS, XR and XL values by 5
numbers.
5. Select a focus & anode combination.
6. Make sure a patient is registered and start an exposure.
7. Use a magnification of 4 in the application software and go to the edges of the
detector. White areas should be visible at all edges of the image. This shows you
that the X-ray does not cover the entire detector and shows where the beam really
ends.
8. Measure the white line thickness at each image edge with the application GUI and
adjust the corresponding XL, XR, YC and YS values with the service software
9. Start an exposure.
Focus and Anode XL XR YC YS
Small focus molly
Large focus molly
Small focus tungsten
Large focus tungsten
Tab. 1 Collimator beam calibration
Fig. 2 Collimator beam calibration
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