Microsoft PowerPoint - Physics Bucharest

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Stochastic vs. Deterministic Methods
 Stochastic (MC)
 Particle tracking process
 Errors come from insufficient
number of interactions
simulated and voxel size
 Stochastic errors
 Low efficiency in large
attenuation regions and volumes
 Deterministic (AXB)
 Solve full phase-space solution
everywhere
 Errors come from insufficient
refinement of discretized
variables
 No statistical noise
 High efficiency in large
attenuation regions and volumes
From: Fogliata Antonella
 Stochastic and deterministic methods:
 both converge to the same solution
 same accuracy