X-ray spectrometry applied for determination of linear attenuation coefficient of polymer-based samples as radiologically tissue-equivalent materials

Autores

  • Gisell Ruiz Boiset Institut of Physics - University of São Paulo
  • Renne Rodrigues Rosinelli Institut of Physics - University of São Paulo
  • Gustavo Freire Institut of Physics - University of São Paulo
  • Raissa Aline Santos Moura Institut of Physics - University of São Paulo
  • Raphael Moratta Institut of Physics - University of São Paulo
  • Elisabeth Mateus Yoshimura Institut of Physics University of São Paulo
  • Paulo Roberto Costa Institut of Physics - University of São Paulo

DOI:

https://doi.org/10.15392/2319-0612.2023.2166

Palavras-chave:

attenuation coefficient, X-ray spectrometry, tissue-equivalent material, polymer

Resumo

In this work we obtained experimental linear attenuation coefficients of polymer-based samples at diagnostic imaging energy range (15-150 keV) for eleven formulations candidates for tissue-equivalent materials (TEMs). TEMs is any material that simulates a human body part or human tissue in its interaction with radiation. In diagnostic radiology,  the maximum difference between the linear attenuation coefficient of the TEMs and the target material should be no more than 5% in the energy range of interest. A polienergetic narrow beam was obtained using a tungsten target x-ray tube and CdTe detector. The densities of the samples were determined and compared with reference materials obtaining a maximum difference of 17%. The comparisons between the  linear attenuation coefficient of the formulations and the respective reference materials for which they were initially designed, has demonstrated good correspondence over a wide energy range. Energy ranges in which the developed samples simulate other human tissues in addition to those initially considered were found, taken into account the criterion that the maximum difference between the linear attenuation coefficients does not exceed 5% is met. The results emphasize the possibility of production and characterization of TEMs to be used in the construction of imaging and dosimetry phantoms.

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Referências

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Publicado

08-05-2023

Edição

v. 11 n. 1A (Suppl.) (2023): RADIO 2022

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Direitos autorais (c) 2023 Brazilian Journal of Radiation Sciences

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Como Citar

X-ray spectrometry applied for determination of linear attenuation coefficient of polymer-based samples as radiologically tissue-equivalent materials. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 11, n. 1A (Suppl.), p. 01–14, 2023. DOI: 10.15392/2319-0612.2023.2166. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/2166. Acesso em: 17 jul. 2025.