BEAMnrc is a Monte Carlo (see Monte Carlo Method

Monte Carlo method

Monte Carlo methods are a class of computational algorithms that rely on repeated random sampling to compute their results. Monte Carlo methods are often used in computer simulations of physical and mathematical systems...

) code system for simulating radiation therapy

Radiation therapy

Radiation therapy , radiation oncology, or radiotherapy , sometimes abbreviated to XRT or DXT, is the medical use of ionizing radiation, generally as part of cancer treatment to control malignant cells.Radiation therapy is commonly applied to the cancerous tumor because of its ability to control...

 sources. It was developed as part of the OMEGA project, a collaboration between the National Research Council of Canada

National Research Council of Canada

The National Research Council is an agency of the Government of Canada which conducts scientific research and development.- History :...

 and a research group at the University of Wisconsin–Madison

University of Wisconsin–Madison

The University of Wisconsin–Madison is a public research university located in Madison, Wisconsin, United States. Founded in 1848, UW–Madison is the flagship campus of the University of Wisconsin System. It became a land-grant institution in 1866...

. It is based on the EGS

EGS (program)

The EGS computer code system is a general purpose package for the Monte Carlo simulation of the coupled transport of electrons and photons in an arbitrary geometry for particles with energies from a few keV up to several TeV. It was developed at SLAC.The SLAC version of EGS is no longer actively...

 code system for the coupled transport of electrons and photons. BEAMnrc can model all types of medical linear accelerators, using the codes component module system.