Siemens MOBILETT XP Digital Maintenance Instruction page 56

56
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Set the central beam so that it is vertical.
•
Set a vertical SID of 100 cm.
•
Switch on the light localizer and adjust a light field of approx. 30x30 cm on the detector.
•
Place the lead ruler (centering cross) centered on the detector.
•
Measure the light field and make a note of the dimensions
•
Position a washer as a side marker.
Fig. 25: Centering cross
•
Create a test patient.
•
Select an organ program from the "TEST" area with approx. 60 kV, 4mAs.
•
X
Initiate exposure.
Evaluation: Light field to radiation field
QSQ Deviation ((A + C) / SID)
QSQ Deviation ((B + D) / SID)
•
Evaluate the deviations (A, C and B, D) between the recorded light field and the radia-
tion field edges on all four sides using the centering cross
zoom function as necessary.
MOBILETT XP Digital
Use the tape measure in the collimator to measure to the top surface of the
detector.
"Exposure ready" appears in the top right corner on the monitor.
The total permissible deviation (disregarding the prefix) amounts to a maximum
of 1.7% of the SID. If the deviation is > 1.7%, the collimator must be adjusted
(see the "Replacement of Parts" instructions).
Log the deviation.
SPR8-230.831.30.03.02
11.05
Inspection and maintenance
(Fig. 25 / p.
(Fig. 26 / p.
Page 56 of 74
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