IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Dose distribution calculation for in-vivo X-ray fluorescence scanning
Autor/es:
RODOLFO FIGUEROA; ENRIQUE LOZANO; MAURO VALENTE
Revista:
REVISTA MEXICANA DE FíSICA
Editorial:
SOC MEXICANA FISICA
Referencias:
Lugar: México; Año: 2013 vol. 59 p. 339 - 342
ISSN:
0035-001X
Resumen:
In-vivo X-ray fluorescence constitutes a useful and accurate technique, worldwide established for constituent elementary distribution as-sessment. Actually, concentration distributions of arbitrary user-selected elements can be achieved along sample surface with the aim ofidentifying and simultaneously quantifying every constituent element. The method is based on the use of a collimated X-ray beam reachingthe sample. However, one common drawback for considering the application of this technique for routine clinical examinations was thelack of information about associated dose delivery. This work presents a complete study of the dose distribution resulting from an in-vivoX-ray fluorescence scanning for quantifying biohazard materials on human hands. Absorbed dose has been estimated by means of dosimetricmodels specifically developed to this aim. In addition, complete dose distributions have been obtained by means of full radiation transportcalculations in based on stochastic Monte Carlo techniques. A dedicated subroutine has been developed using the PENELOPE 2008 maincode also integrated with dedicated programs -MatLab supported- for 3D dose distribution visualization. The obtained results show verygood agreement between approximate analytical models and full descriptions by means of Monte Carlo simulations.