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Change of vs: Example Eclipse

PDD

Profiles

Dose

Gamma 3%-3mm

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





 



 



 

 

N

i

i

D

D

z

z

N

I

1

2

20

2

10

2

50

2

max

1

%1

%1

mm1

mm1

4

1

6 MV X-rays

PDD differences

up to 8mm and

3%.

MU differences

up to 2%

Vs 13.5 uses a

calculated

spectra while

the previous vs

use a theoretical

spectra.

 

    

N

i

i

d d d d d d

N

I

1

2

80

2

50

2

20

2

80

2

50

2

20

2

'

'

'

6

1

N

i

D

N

I

1

2

abs

3

1