Dose 2016

6 MV X-rays

Change of vs: Example Eclipse

   

   

2

2

2

2

N

   ∆

 

   ∆

 

   ∆

 

   ∆

  

1

N

z

z

D

D

1

{

}

∑

=

+

+

+

2 20

2 50

2 80

2 20

2 50

2 80

∑

max

50

10

20

I

∆+ ∆+ ∆+ ∆+ ∆+ ∆ i d d d d d d '

=

'

'

I

1

2

4

mm1

mm1

%1

%1

N

N

6

i

1

=

1

i

i

=

Dose

PDD

PDD differences up to 8mm and 3%.

MU differences up to 2%

Profiles

Vs 13.5 uses a calculated spectra while the previous vs use a theoretical spectra.

Gamma 3%-3mm

N

1

∑

2 abs

=

∆

I

D

3

N

1

i

=

Thanks to Artur Latorre-Mussoll Servei de Radiofisica Hospital Sant Pau

Utretch 2016