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| Program name | Package id | Status | Status date |
|---|---|---|---|
| FOTELP-2018 | IAEA1388/07 | Tested | 29-JUN-2020 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| IAEA1388/07 | PC Windows | PC Windows |
FOTELP-2018 is a new compact general-purpose version of the previous FOTELP-2014 code designed to simulate the transport of photons, electrons and positrons through three-dimensional material and sources geometry by Monte Carlo techniques, using subroutine package PENGEOM from the PENELOPE code under Windows OS. This new version includes routine ELMAG for electron and positron transport simulation in electric and magnetic fields, RESUME option and routine TIMER for obtaining starting random number and for measuring the time of simulation, and brachytherapy 3D dose calculation.
Physical rigor is maximized by employing the best available cross sections and high speed routines for random values sampling from their distributions, and the most complete physical model for describing the transport and production of the photon/electron/positron cascade from 100.0 MeV down to 1.0 keV. FOTELP-2018 is developed for numerical experiments by Monte Carlo techniques for dosimetry, radiation damage, radiation therapy and other actual applications of these particles.
For the photon history, the trajectory is generated by following it from scattering to scattering using corresponding inverse distribution between collision, types of target, types of collisions, types of secondaries, their energy and scattering angles. Photon interactions are coherent scattering, incoherent scattering, photoelectric absorption and pair production. Doppler broadening in Compton scattering are taken. The histories of secondary photons include bremsStrahlung and positron-electron annihilation radiation. The condensed history Monte Carlo method is used for the electron and positron transport simulation. During a history the particles lose energy in collisions, and the secondary particles are generated on the step according to the probabilities for their occurrence. Electron (positron) energy loss is through inelastic electron-electron (e-, e-) and positron-electron (e+, e-) collisions and bremsstrahlung generation. The fluctuation of energy loss (straggling) is included according to the Landau's or Blunk-Westphal distributions with 9 gaussians. The secondary electrons, which follow history of particles, include knock-on, pair production, Compton and photoelectric electrons. The secondary positrons, which follow pair production, are included, too. With atomic data, the electron and positron Monte Carlo simulation is broadened to treat atomic ion relaxation after photo-effect and impact ionization. Flexibility of the codes permits them to be tailored to specific applications and allows the capabilities of the codes to be extended to more complex applications, especially in radiotherapy in voxelized geometry using CT data.
Running time largely depends on simulation intention, type of particle, if simulation includes electric and/or magnetic field, on the number of histories to be simulated, on kind of initial and cut-off energies of particles, and on considered geometry. The adopted parameters (energy cut-offs, geometry zones, etc.) also have an influence on the computing time.
For the cross-section generating, probabilities and inverse distributions calculation by FEPDAT or FEPFOT code, on DELL 755 computer Intel Celeron 430, 1.8GHz and 2GB DDR2 execution time is about five seconds for one material. For example, brachytherapy source YB 169 HDR M42 with 100,000 histories can be obtained with a running time of about 1.06 minutes.
FEPFOT interactive program for generating input files FEPDAT.INP and FOTELP.INP.
FEPDAT program for generating probabilities distributions of photons, electrons and positrons.
PREGRAF program for 2D and 3D imaging data preparation.
Voxelview software for 3D dose presentation.
GVIEW, PENTEST or PENVIEW programs for viewing and debugging the geometry input files.
GVIEW code is a part of PENELOPE-2018 - A Code System for Monte Carlo Simulation of Electron and Photon Transport (Document NEA/MBDAV/R(2019)1 - OECD Nuclear Energy Agency, Boulogne-Billancourt, France, 2019) http://www.oecd-nea.org/tools/abstract/detail/nea-1525/
Francesc Salvat:
PENELOPE-2018 - A Code System for Monte Carlo Simulation of Electron and Photon Transport - Workshop Proceedings Barcelona, Spain 28 January - 1 February 2019 (NEA/MBDAV/R(2019)1 - ISSN 2707-2894 - July 2019) http://www.oecd-nea.org/tools/abstract/detail/nea-1525/
Julio Almansa, Francesc Salvat-Pujol, Gloria Diaz-Londono, Artur Carnicer, Antonio M. Lallena and Francesc Salvat:
PENGEOM - A general-purpose geometry package for Monte Carlo simulation of radiation transport in complex material structures (9 June 2015). Computer Physics Communications, https://www.sciencedirect.com/science/article/pii/S0010465515003707
Radovan D. Ilic, PhD
Institute of Nuclear Sciences VINCA
Physics Laboratory (010)
Mike Petrovica Alasa 12-14
11351 Vinca, Beograd, Serbia
WEB Site: https://www.vinca.rs/~rasa/hopa.htm
Keywords: 3D dose, 3D source, Monte Carlo method, electric fields, electrons, magnetic fields, photons, positrons, radiotherapy, three-dimensional.
