Course book Advanced Treatment Planning 2018

Very clear lung tumor: classic RT

all in cm

systematic errors

randomerrors squared

squared

delineation organ motion setup error

0.2 0.3 0.2

0.04

0

0.3 0.4

0.09

0.09

0.04

0.16

Intra-fraction motion respiration motion

0

0

0.1

0.3 0.111111

1

0.01

(0.33A)

total error

0.42

0.60 0.361111

0.18

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