Year: 1987
Type: article
Abstract: Monte Carlo simulation is widely used in medical physics to obtain realistic solutions to radiation transport problems involving complex geometries. An important step is the random selection of the initial point in space from which the primary photon or charged particle originates. In many practical cases, the primary-particle sites are distributed over curved surfaces. We describe general sampling techniques that can be used to randomly choose the trajectory origin for sources distributed over any smooth surface that can be parametrically represented as a function of two variables. The source distribution need not be uniform. Implementation of these methods is particularly straight-forward for surfaces enclosing simple convex volumes such as spheres and ellipsoids.
Source: Physics in Medicine and Biology
Author: J F Williamson
Institution: University of Arizona
Language: English
Subfield: Radiation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Award: G1038277108
OpenAlex ID: W2031413646