PMID: 8971976Dec 1, 1996Paper

The role of phantom and treatment head generated bremsstrahlung in high-energy electron beam dosimetry

Physics in Medicine and Biology
B B SorciniA Brahme

Abstract

An analytical expression has been derived for the phantom generated bremsstrahlung photons in plane-parallel monoenergetic electron beams normally incident on material of any atomic number (Be, H2O, Al, Cu and U). The expression is suitable for the energy range from 1 to 50 MeV and it is solely based on known scattering power and radiative and collision stopping power data for the material at the incident electron energy. The depth dose distribution due to the bremsstrahlung generated by the electrons in the phantom is derived by convolving the bremsstrahlung energy fluence produced in the phantom with a simple analytical energy deposition kernel. The kernel accounts for both electrons and photons set in motion by the bremsstrahlung photons. The energy loss by the primary electrons, the build-up of the electron fluence and the generation, attenuation and absorption of bremsstrahlung photons are all taken into account in the analytical formula. The longitudinal energy deposition kernel is derived analytically and it is consistent with both the classical biexponential relation describing the photon depth dose distribution and the exponential attenuation of the primary photons. For comparison Monte Carlo calculated energy depositi...Continue Reading

References

Jan 1, 1979·Acta Radiologica: Oncology, Radiation, Physics, Biology·A Brahme, H Svensson
Mar 1, 1992·Medical Physics·M KarlssonH Svensson
Oct 1, 1989·Physics in Medicine and Biology·H Huizenga, P R Storchi
May 1, 1986·Acta Radiologica. Oncology·A Brahme, P Andreo
Sep 1, 1987·Medical Physics·S N Rustgi, J E Rodgers
Jan 1, 1980·Acta Radiologica. Oncology·A BrahmeH Svensson
Jan 1, 1983·Acta Radiologica. Oncology·B Nilsson, A Brahme
Sep 1, 1981·Medical Physics·P Andreo, A Brahme
Aug 1, 1996·Physics in Medicine and Biology·R Svensson, A Brahme

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Citations

Aug 8, 2001·Medical Physics·T C ZhuB E Bjärngard
Apr 11, 2000·Medical Physics·B A Faddegon, I Blevis
Nov 4, 2008·Medical Physics·Jadwiga B WojcickaDonette E Lasher
Jul 3, 1998·Physics in Medicine and Biology·A SamuelssonK A Johansson
Jun 12, 1998·Physics in Medicine and Biology·R SvenssonA Brahme

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