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Very clear lung tumor: classic RT

all in cm

systematic errors

squared

randomerrors

squared

delineation

0.2

0.04

0

organ motion

0.3

0.09

0.3

0.09

setup error

0.2

0.04

0.4

0.16

Intra-fraction motion

0

0

respiration motion

0.1

0.01

0.3

0.111111

1

(0.33A)

total error

0.42

0.18

0.60

0.361111

times 2.5

difficult equation

(almost times 0.7)

error margin

1.06

0.41

total error margin

1.47

Using conventional fractionation, prescription at 95% isodose line in lung