Physics Athens 2016

Variance Reduction Techniques

 Particle Splitting  To get more particles to the patient  Split particle close to the patient and simulate track for both particles independently  Statistical weight is adjusted  Often used for the brehmsstrahlung photons in the target inside the linac head  History Repetition  Applied to electrons  …

Danger of not probing all parts of the geometry Reducing calculation time per history means simplifying the physics