3D dose calculations for electron and photon beams

Autor:	Martin D. Altschuler, E L Buhle, S Ayyalasomayajula, Peter Bloch
Rok vydání:	1992
Předmět:	Physics Beam diameter Photon Radiological and Ultrasound Technology business.industry Physics::Medical Physics Monte Carlo method Electron Pencil (optics) Optics Physics::Accelerator Physics Radiology Nuclear Medicine and imaging M squared Laser beam quality business Beam (structure)
Zdroj:	Physics in Medicine and Biology. 37:391-411
ISSN:	1361-6560 0031-9155
Popis:	A new method has been implemented to calculate rapidly and accurately the three-dimensional dose distribution induced in a heterogeneous volume by one or more electron and/or photon beams. The algorithm is based on the pre-calculation by Monte Carlo of one or more (pencil beam) kernels, where a kernel is the distribution of absorbed energy density within a uniform medium by a unit of beam energy incident normally on a small area of the air-medium surface. Once the intensity and energy distributions of a clinical beam are deduced from measurements, the appropriate kernels can be obtained for that beam. Kernels allowed one to estimate how each pencil of a beam deposits its energy in an inhomogeneous medium. When the patient contours and density distribution are known, and beam parameters are specified, the beam energy delivered to each element of the patient surface is calculated and then distributed within the patient volume in accord with the relevant kernels.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::af56456e1e6094488c8e6613758aaa7d https://doi.org/10.1088/0031-9155/37/2/007 Zobrazit plný text záznamu