Dose Course 2018_Flipping book

13

Open field depth doses 6 MV

Depth dose curves normalized to the output at 10 cm depth of the 10cm x 10cm field.

Ratio, d(i), between calculated and measured dose per monitor unit values

1.100

1.8

5x5 10x10 15x15 20x20

5x5/Meas

10x10/Meas

1.6

1.075

15x15/Meas

20x20/Meas

5x5/Calc

10x10/Calc

1.4

1.050

15x15/Calc

20x20/Calc

1.2

1.025

1.0

1.000

d(i)

0.8

Dose (%)

0.975

0.6

0.950

0.4

0.925

0.2

0.900

0.0

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

Depth (cm)

Depth (cm)

MiD

/)(

c

c

D

c MiD M ref /) (

c

d

i

)( =

/)(

m

m

D

M ref /) (

m

m

Dublin 2018