Effect of air cavities on the dose delivered to the lung during high-dose brachytherapy |
| |
Authors: | Ambrosi Richard M. Watterson John I. W. Nam Tom Keddy Rex J. |
| |
Affiliation: | (1) Schonland Research Centre for Nuclear Sciences, University of the Witwatersrand, Private Bag 3, PO Wits 2050 Johannesburg, South Africa;(2) Department of Medical Physics, Hillbrow Hospital, Johannesburg, South Africa |
| |
Abstract: | In the treatment of lung cancer using the radiotherapy technique of intracavitary brachytherapy with an192Ir source, the lung is normally assumed to be entirely composed of a homogenous mass of soft tissue. The aim of this study is to investigate whether there is the possibility that the air cavities in the lung influence the dose delivered to the lung at a prescribed distance from the source. The Monte Carlo code MCNP-4A was used to model the dose delivered by both192Ir and198Au as a function of treatment medium, density and composition, photon energy, and distance from the source. The suitability of MCNP-4A for this study was tested by producing depth-dose profiles for photons in water and comparing these to calculated profiles produced using well-documented methods. |
| |
Keywords: | Brachytherapy lung dose air cavities Monte Carlo |
本文献已被 SpringerLink 等数据库收录! |
|