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

Gisell Ruiz Boiset; Renne Rodrigues Rosinelli; Gustavo Freire; Raissa Aline Santos Moura; Raphael Moratta; Elisabeth Mateus Yoshimura; Paulo Roberto Costa

doi:10.15392/2319-0612.2023.2166

Authors

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

Keywords:

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

Abstract

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.

Views: 221
PDF Downloads: 111
XML Downloads: 11

Downloads

Download data is not yet available.

References

ICRU - International Commission on Radiation Units and Measurements. Tissue Substitutes in Radiation Dosimetry and Measurement. ICRU Report 44, Bethesda: ICRU, 1989.

TUĞRUL, Taylan; EROĞUL, Osman. Analysis of water-equivalent materials used during irradiation in the clinic with XCOM and BEAMnrc. Journal of Radiation Research and Applied Sciences, v. 12, n. 1, p. 455-459, 2019. https://doi.org/10.1080/16878507.2019.1708576

HILL, R. F.; BROWN, S.; BALDOCK, C. Evaluation of the water equivalence of solid phantoms using gamma ray transmission measurements. Radiation Measurements, v. 43, n. 7, p. 1258-1264, 2008. https://doi.org/10.1016/j.radmeas.2008.01.019

SOARES, Leonardo Diniz Hipólito; GOBO, Michel Stephani da Silva; POLETTI, Martín Eduardo. Measurement of the linear attenuation coefficient of breast tissues using polienergetic x-ray for energies from 12 to 50 keV and a silicon dispersive detector. Radiation Physics and Chemistry, v. 167, p. 108226, 2020. https://doi.org/10.1016/j.radphyschem.2019.03.030

AMINI, Iman; AKHLAGHI, Parisa; SARBAKHSH, Parvin. Construction and verification of a physical chest phantom from suitable tissue equivalent materials for computed tomography examinations. Radiation Physics and Chemistry, v. 150, p. 51-57, 2018. https://doi.org/10.1016/j.radphyschem.2018.04.020

MCGARRY, Conor K. et al. Tissue mimicking materials for imaging and therapy phantoms: a review. Physics in Medicine & Biology, v. 65, n. 23, p. 23TR01, 2020. doi 10.1088/1361-6560/abbd17

MARIANO, Leandro; COSTA, Paulo R. Abstract ID: 94 Development of a methodology for formulating radiologically equivalent materials to human tissues. Physica Medica: European Journal of Medical Physics, v. 42, p. 20-21, 2017. https://doi.org/10.1016/j.ejmp.2017.09.051

TOMAL, A. et al. Experimental determination of linear attenuation coefficient of normal, benign and malignant breast tissues. Radiation Measurements, v. 45, n. 9, p. 1055-1059, 2010. https://doi.org/10.1016/j.radmeas.2010.08.008

SANTOS, Josilene C. et al. Direct measurement of clinical mammographic x‐ray spectra using a CdTe spectrometer. Medical Physics, v. 44, n. 7, p. 3504-3511, 2017. https://doi.org/10.1002/mp.12287

DI CASTRO, E. et al. The use of cadmium telluride detectors for the qualitative analysis of diagnostic x-ray spectra. Physics in Medicine & Biology, v. 29, n. 9, p. 1117, 1984. doi 10.1088/0031-9155/29/9/008

COSTA, Paulo Roberto et al. Evaluation of X-ray spectra transmitted by different concrete compositions. Radiation Physics and Chemistry, v. 116, p. 349-354, 2015. https://doi.org/10.1016/j.radphyschem.2015.03.040

BERGER, Martin J.; HUBBELL, J. H. XCOM: Photon cross sections on a personal computer. National Bureau of Standards, Washington, DC (USA). Center for Radiation Research, 1987. https://doi.org/10.2172/6016002

HUBBELL, J. H.; SELTZER, S. M. NIST standard reference database 126. Gaithersburg, MD: National Institute of Standards and Technology, 1996.

WHITE, D. R.; WOODARD, H. Q.; HAMMOND, S. M. Average soft-tissue and bone models for use in radiation dosimetry. The British journal of radiology, v. 60, n. 717, p. 907-913, 1987. https://doi.org/10.1259/0007-1285-60-717-907

POLETTI, M. E.; GONÇALVES, O. D.; MAZZARO, I. X-ray scattering from human breast tissues and breast-equivalent materials. Physics in Medicine & Biology, v. 47, n. 1, p. 47, 2001. doi 10.1088/0031-9155/47/1/304