Microsoft PowerPoint - Physics Bucharest

Input Particles



Modelling

of radiation source consists of sampling the required

information about initial particles (

type of particle

starting

coordinates,

direction

cosines,

energy

, charge and particle

weight

)



The

linac

can be divided into:



Upper

part - components that remain fixed for all possible beams

settings

(Patient independent)



Lower

part - beam modifiers

(Patient dependent)



The

upper

part is modeled only

once

and a

phase-space file

is generated

at the entrance of the lower part



This file is then used as an

input

for the MCTP calculation (the lower part

and the patient are handled in one process)