Information found on this page has been archived and is for reference, research or recordkeeping purposes. Please visit NRC's new site for the most recent information.
Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats by contacting us.
BEAMnrc is a specialized user code that makes use of EGSnrc for simulating the treatment heads on linear accelerators used for cancer therapy.
A prerequisite for the accurate simulation of radiation transport is detailed knowledge of the radiation source. The most common source of radiation for cancer therapy is a linear accelerator which uses a complicated series of targets, filters and collimators to produce a suitable beam. The BEAMnrc code was specifically developed for the accurate simulation of the treatment head of a clinical accelerator.
We implemented a new variance reduction technique called directional bremsstrahlung splitting (DBS), in the BEAMnrc software package. DBS dramatically increases the efficiency of photon beam treatment head simulations with BEAMnrc (up to a factor of 8 compared to the most efficient simulation technique previously available), thus permitting more detailed studies of the output of medical linear accelerators.
Originally, the BEAMnrc code would be run first to generate a phase space file which fully specified the characteristics of a large number of particles emerging from the treatment head. With recent improvements, the code is fast enough that it can be used as a shared library with other codes such as EGSnrc, generating new particles as requested, thus avoiding the intermediate step of saving a phase space file.
The link above will take the viewer to web pages for scientific research purposes only, not intended as a service to the general public. Due to the highly technical and dynamic nature of the content, expectations of adherence to Government of Canada Common Look and Feel and Official Language requirements may not be met.
The opinions and information presented here do not represent the views of the Government of Canada. The data on this Web site is preliminary, and procedures described may be untested. The Government of Canada disclaims all liability for any actions taken as a result of information found on this Web site.