2017_SBRT_Course Book

40

Prescription isodose vs modern linac RT

35

30

45

50% 70% 80% 90% 90% IMRT ideal

40

25

35

30

20

25

20

15

Dose (Gy)

15

IMRT enables delivery of better dose profiles

10

10

But it needs a description of what‘s “better”

5

0

5

-14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1

x (mm)

0

-9

-8

-7

-6

-5

-4

-3

-2

-1

14 13 12 11 10