Light Field/Radiation Field; Evaluation: Light Field To Radiation Field - Siemens MOBILETT XP Digital Installation And Startup

Start-up

Light field/radiation field

Checking the light and radiation field
•
Place the detector (35 cm x 43 cm) on the tabletop.
•
Set the central beam so it is vertical.
•
Set a vertical SID of 100 cm; measure to the upper edge of the detector using the tape
measure in the collimator.
•
Switch on the light localizer and set a light field of approx. 30 cm x 30 cm.
•
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. 16: Centering cross
•
Create a test patient.
•
Select an organ program from the "test" range, with approx. 60 kV, 4 mAs.
•
X
Release an exposure.

Evaluation: light field to radiation field

•
Using the centering cross, evaluate on screen, on all four sides, the deviations (A, C
and B, D) between the recorded light field and the radiation field edges
Use the zoom function as necessary.
P
Siemens AG
Medical Solutions
The maximum total allowable deviation from the SID is 1.7% (regardless of the
prefix). If the deviation is > 1.7%, the collimator must be adjusted (see the
"Replacement of Parts" instructions).
SPR8-230.814.30.03.02
11.05
(Fig. 16 / p.
MOBILETT XP Digital
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37
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37).
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(Fig. 17 / p. 38).