Optimization of radiography applications using x-ray beams emitted by compact accelerators. Part I. Monte Carlo study of the hard x-ray spectrum

Medical Physics
M MarzianiM Gambaccini

Abstract

A 3-year project called LABSYNC has been recently funded by the European Commission, with the aim of designing a radiation facility based on a compact light source, i.e., a laboratory-sized commercial synchrotron, capable of accelerating electrons up to 6 or 20 MeV. An accurate spectral description of hard x rays emitted from thin targets, irradiated by electron beams circulating in the storage ring, is of primary interest for the design and the characterization of a beamline. This article, Part I, aims at optimizing some of the parameters which are critical for the design of medical applications based on the above compact light source. The goal was to evaluate the dependence of photon fluence and beam monochromaticity on electron-beam energy, target material, and thickness. The transport of 6 and 20 MeV electrons in a thin molybdenum, rhodium, and tungsten target is studied by means of Monte Carlo simulations using MCNPX. Configurations of the x-ray output port, different from the default forward-directed emission of the beam, are also investigated. A comparison with reference spectra for general diagnostic radiology and mammography is carried out. It is shown that the emitted x-ray beams can be far more intense than those gen...Continue Reading

References

Sep 1, 1981·Medical Physics·R J JenningsD L Ergun
Apr 1, 1995·Radiology·E BurattiniG Simonetti
Feb 12, 2002·Physics in Medicine and Biology·M MarzianiM Gambaccini
Apr 5, 2002·Medical Physics·Daryoush Sheikh-Bagheri, D W O Rogers
Dec 13, 2002·Physics in Medicine and Biology·S FabbriM Gambaccini
Dec 19, 2003·Physics in Medicine and Biology·P BaldelliM Gambaccini
Mar 17, 2004·The British Journal of Radiology·P MeyerP Siffert
Oct 9, 2004·Physics in Medicine and Biology·P BaldelliM Gambaccini
May 7, 2005·Physics in Medicine and Biology·P BaldelliM Gambaccini
Feb 4, 2006·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Asghar MesbahiDavid I Thwaites
Aug 23, 2006·Journal of Synchrotron Radiation·Toru HiraiKiyoshi Murata
Feb 26, 2009·Journal of Synchrotron Radiation·Md Monirul HaqueMami Yamada

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Citations

Jun 29, 2014·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·M MarzianiP Cardarelli

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