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Monte Carlo simulations for medical applications

The purpose of this wiki is to help students and employees at the University of Bergen and collaborator to get started with Monte Carlo simulations with FLUKA and GEANT4. The page will contain information on Monte Carlo simulations with FLUKA and GEANT4 for medical applications.

The content of this page can be viewed by members of the medical physics research group at the Institute for Physics and Technology at the University of Bergen.

For questions related to this wiki or its content, please send an email Kristian Smeland Ytre-Hauge()


Relative distribution of neutron dose on the surface and inside water phantoms irradiated with a 3 x 3 cm2 photon field in the 15 MV energy mode (right) and a carbon ion irradiation of a 3 x 3 x 3 cm3 target volume (left). The radiation fields enter the center of the cube from above.

FLUKA basics

FLUKA is a general purpose Monte Carlo particle transport code covering a wide range of applications including basic research in high energy physics, radiation protection, dosimetry and a number of other applications. The use of FLUKA in Monte Carlo simulations related to radiation therapy, including protons and carbon ions, has previously been evaluated.

In order to download and install FLUKA you must register as a user on the official FLUKA web-page. The web-site also contains a lot of useful information including [ lectures and exercises from FLUKA courses.

Information on installation, creating and running simulations can be found at the dedicated FLUKA page of this wiki.


Flair is an advanced user friendly interface for FLUKA to facilitate the editing of FLUKA input files, execution of the code and visualization of the output files. It is based entirely on python and Tkinter. Further information and download can be found here


Geant4 is a toolkit for the simulation of the passage of particles through matter. Its areas of application include high energy, nuclear and accelerator physics, as well as studies in medical and space science. The two main reference papers for Geant4 are published in Nuclear Instruments and Methods in Physics Research (A 506 (2003) 250-303), and IEEE Transactions on Nuclear Science (53 No. 1 (2006) 270-278).


FLUKA wiki page FLUKA

GEANT4 wiki page GEANT4

The official FLUKA web-page

The official GEANT4 web-page

Consult the User's Guide for information on using the wiki software.

Getting started