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Table 2 Pre-treatment and during treatment isocenter placement errors

From: Planning target volume margins for prostate radiotherapy using daily electronic portal imaging and implanted fiducial markers

 

Pre-treatment (cm)

During treatment (cm)

 

Min

Mean

Median

Max

SD

Min

Mean

Median

Max

SD

A-P mismatch

-1.40

0.01

0.03

2.00

0.47

-1.10

0.03

0.03

0.75

0.22

R-L mismatch

-1.20

0.01

0.00

2.20

0.35

-2.66

0.01

0.02

0.80

0.22

S-I mismatch

-2.15

-0.24

-0.20

1.50

0.48

-0.89

0.01

0.00

1.15

0.22