Dose Course 2018_Flipping book

Treatment preparation errors

z

Probability that target position r (r 2 =x 2 +y 2 +z 2 ) is within radius w:

− 2 2Σ 2 2 Σ

− 2 2Σ 2 2 Σ

− 2 2Σ 2 2 Σ

2

< = න

⋅

⋅

4

y

0

x

2 2Σ 2

2

− −

< =

w

2Σ

0 0,2 0,4 0,6 0,8 1 1,2

P=0.9

= 0.9 ⇒ < = 2.5Σ

⟺ + < + 2.5Σ ⟹

= 2.5Σ

Σ

0

1

2

3

4

5

w/ S =2.5