Validation and study of different parameters in the simulation of diagnostic X-ray spectra using the MCNPX code

K.C.W. Consatti; W. S. Santos; J. V. B. Valença; M. T. Yoshizumi

doi:10.15392/2319-0612.2023.2119

Authors

Karin Cristina Wink Consatti Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA) https://orcid.org/0000-0002-5537-1912
William de Souza Santos Universidade Federal de Uberlândia (UFU) https://orcid.org/0000-0002-3828-5000
João Vinícius Batista Valença Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA) https://orcid.org/0000-0001-9091-6925
Maíra Tiemi Yoshizumi Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA) https://orcid.org/0000-0001-9256-9146

DOI:

https://doi.org/10.15392/2319-0612.2023.2119

Keywords:

X-ray spectrum, Monte Carlo simulation, MCNPX

Abstract

In radiology, knowing the X-ray spectrum characteristics makes it possible to estimate the absorbed dose in the patient and to improve image quality. In this study, an X-ray generator was proposed using the MCNPX code and to validate it, the simulated spectrum was compared to the data provided from AAPM Task Group 195, which resulted in a percentage difference of 8.7%. Furthermore, several X-ray spectra were generated and compared to the spectra obtained from commercially available softwares as xpecgen and SpekCalc. The percentage differences were of the order of 13% in comparison with SpekCalc and 8% with xpecgen. The major differences obtained between those spectra were concentrated in the region of characteristic peaks, independently if variations in electron beam energy, target angle or filtration thickness were performed.

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