Dose 2016

”Exact” version of vHMF for 90% CDF(CTV) and 95% dose

)

(

2

2

2.5 1.645 Σ = ⋅ + ⋅

M

σ σ σ + −

p

p

)

(

2

2

1.645

0.32 0.32

⋅

+ −

σ

Most common version

0.4

0.3

0.7 σ ⋅

2.5 0.7 cm Σ σ = ⋅ + ⋅

M

0.2

0.1

0.1

0.2

0.3

0.4

0.5

Limitations?

• large box shaped PTV for the dose profile (analytical convolution) • spherical shape of the CDF for the CTV (analytical CDF)

• infinite number of fractions (convolution)