Notes on trouble-shooting 4 - 21
Siemens AG RXB8-115.061.02 Page 21 of 24 POLYMOBIL III
Medical Solutions Rev. 01 10.95 CS PS 24
Fig. 4
Evaluation:
• Measure the deviations between light field edges and radiation field edges on all four
sides (X1,X2,Y1, Y2) as shown in Fig. 4.
• Determine the total deviations in the X and Y direction (ignore the +/- signs).
• Both the length deviation ( Σ Y) and the width deviation ( Σ X) must be less than 1.6 cm.
X
1
Y
1
Y
2
X
2
Film
Light field
Radiation field
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