Physics Bucharest 2017

Why Monte Carlo Treatment Planning?

OCRs for the 35 mm collimator

Measured @ 15 mm Measured @ 100 mm Measured @ 300 mm Calculated @ 15 mm Calculated @ 100 mm Calculated @ 300 mm

1

 Antolak

0.6 0.7 0.8 0.9

 When one speeds up the MCTP, it is no more exact

 Mohan

0.5

0.4

 Approximations introduce no bias  Resolutions up to 2 or 3 mm can be reached within a few minutes

Normalized Dose

0.2 0.3

0.1

0

0

5

10

15

20

25

30

35

Position (mm)