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22

Star dose measurements – machine variability

12 Siemens Primus 10 MV

Red lines are individual star scans (21 per machine, 10° intervals)

+1 sd+

Median

-1 sd-

2

4

6

8

10

12

14

Off axisdistance cm

99

100

101

102

103

104

105

106

ler .

esoD

Measurementvariations, Starscansfor 12 of SiemensPrimus10MV