Radiation Therapy Treatment Planning, Monte Carlo Calculations in

摘要: The distribution of radiation in three-dimensional (3D) heterogeneous geometry is governed by the Boltzmann transport equation. In general, it does not have analytic solutions, and therefore one has to rely on numerical methods. Monte Carlo simulation probably most accurate method for such problems. It uses random sampling techniques simulate various physical events. therapy, commonly used radiations are photons electrons with energies up 20 MeV. can be machine that produces or 3D images patient under treatment. a Monte calculation therapy treatment planning, particles generated tracked through components head followed into body, inside which relevant events simulated energy deposited. Several examples given illustrate application calculations planning. These include beam characteristics simulating head, dose photon electron beams. Keywords: monte carlo methods; radiation therapy; dose