Computational modeling of beam-customization devices for heavy-charged-particle radiotherapy
arXiv:0711.4178 · doi:10.1088/0031-9155/53/12/003
Abstract
A model for beam customization with collimators and a range-compensating filter based on the phase-space theory for beam transport is presented for dose distribution calculation in treatment planning of radiotherapy with protons and heavier ions. Independent handling of pencil beams in conventional pencil-beam algorithms causes unphysical collimator-height dependence in the middle of large fields, which is resolved by the framework comprised of generation, transport, collimation, regeneration, range-compensation, and edge-sharpening processes with a matrix of pencil beams. The model was verified to be consistent with measurement and analytic estimation at a submillimeter level in penumbra of individual collimators with a combinational-collimated carbon-ion beam. The model computation is fast, accurate, and readily applicable to pencil-beam algorithms in treatment planning with capability of combinational collimation to make best use of the beam-customization devices.
16 pages, 5 figures
References in corpus (3)
Cited by in corpus (3)
- Alternative scattering power for Gaussian beam model of heavy charged particles
- Dynamic splitting of Gaussian pencil beams in heterogeneity-correction algorithms for radiotherapy with heavy charged particles
- Modeling of beam customization devices in the pencil beam splitting algorithm for heavy charged particle radiotherapy