Physics Athens 2016

Stochastic vs. Deterministic Methods

 Stochastic and deterministic methods:  both converge to the same solution  same accuracy





Stochastic (MC) 

Deterministic (AXB) 

Particle tracking process

Provides full solution of photon and electron fluence  Errors come from insufficient refinement of discretized variables  No statistical noise  High efficiency in large attenuation regions and volumes



Errors come from insufficient number of interactions simulated and voxel size



Stochastic errors

 Low efficiency in large attenuation regions and volumes  Parallelization

Adapted from Fogliata Antonella

Courtesy by Danny Lathouwers