54 Inspection and maintenance
MOBILETT Plus/ -E/ -M SPR8-215.831.04.03.02 Siemens AG
07.05 CS PS 24
Page 54 of 64
Medical Solutions
2.14 Coincidence of radiation and light fields
Fig. 33:
NOTE
If the MOBILETT is equipped with a DAP measuring system, re-
move the DAP ionization chamber first.
Fig. 34:
• Set 52 kV and 2.0 mAs on the control and display panel.
X
• Release an exposure.
• Develop the film and measure the deviation between the light and radiation fields. A de-
viation of ± 1.7% of the SID is acceptable. (Fig. 34 / p. 54)
• Insert a film into the 35x35 cm (14"x14") cassette.
• Place the cassette on a table or similar surface.
• Set the SID to 100 cm (39") (use a tape measure).
• Switch the collimator lamp on and align the cassette. Now collimate the light field to
25x25 cm (10"x10").
• Mark the four corners of the light field with coins and identify one of the corners with an
additional coin, (Fig. 33 / p. 54)
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