Comparative analysis of the transmission properties of tissue equivalent materials

Nascimento, Bruna C.; Frimaio, Audrew; Barrio, Ramon M.M.; Sirico, Ana Carolina Albernaz; Costa, Paulo Roberto

doi:10.1016/j.radphyschem.2019.04.050

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…Different parameters have been used to classify tissueequivalent materials. These parameters include mass attenuation coefficient [27], Kerma factor [34], dielectric properties [21], mass density (ρ) [35], [36], effective electron density (Neff) [36], effective atomic number (Zeff), photon mass energy-absorption coefficient (μen/ρ), photon mass attenuation coefficient (μ/ρ), the total stopping power of electrons (S/ρ)tot, the absorbed depth dose [36] and the buildup parameters of the tissue-equivalent [37]. Considering Kerma factors and agreement with water equivalence, natural rubber was found to be most appropriate as soft tissue equivalent [34].…”

Section: A Tissue Equivalent Substitutesmentioning

confidence: 99%

Characterization of the Urethane Based Tissue Equivalent Substitute for Phantom Construction: Model Molding, XCOM and MCNPX Studies

Bello¹,

Nor²,

Hassan³

2022

International Journal on Advanced Science, Engineering and Information Technology

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The Soft and Lung tissue equivalent substitute (STES and LTES) were developed from urethane PMC121/30 Dry (A and B) of Smooth-On, USA. The part A and B were mixed in the ratio 1:1 and further mixed with calcium carbonate (CaCO3) at a ratio 2:1 by mass. Air moisture was extracted from the mixture for 10minutes. This is the STES and the density after air extraction was 1.04gcm -3 . The LTES was developed by mixing the STES and polystyrene beads at a ratio 10:1 by mass. The density of the LTES was 0.25gcm -3 after air extraction. The STES and the LTES were subjected to compression test for stress-strain analysis. The elemental composition of STES and LTES was achieved using XCOM software with the IUPAC nomenclatures of the source compounds as inputs. The elemental composition obtained was used to modify the lung and the soft tissue material of the AMALE and AFEMALE computational phantom of ORNL. The phantom was subjected to photon exposure (0.06MeV-15.00MeV) using MCNPX Version 27e. The results from MCNPX provided the bremsstrahlung, positron annihilation, and the fluorescence energies that was used to estimate the g-factor. The mass-energy transfer coefficient (μtra/ρ) and the mass-energy absorption coefficient (μen/ρ) were calculated using the values of g-factor, the fluence and the Kerma. The μen/ρ of the tissue-equivalent agrees with the National Institute of Standard values and the ICRU 44. The STES and LTES are technically proper research and teaching models for dose measurements with these results.

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Section: A Tissue Equivalent Substitutesmentioning

confidence: 99%

Characterization of the Urethane Based Tissue Equivalent Substitute for Phantom Construction: Model Molding, XCOM and MCNPX Studies

Bello¹,

Nor²,

Hassan³

2022

International Journal on Advanced Science, Engineering and Information Technology

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X-ray spectrometry applied for determination of linear attenuation coefficient of tissue-equivalent materials

Frimaio

Nascimento

Barrio

et al. 2019

Radiation Physics and Chemistry

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Comparison of X-Ray Absorption in Mandibular Tissues and Tissue-Equivalent Polymeric Materials Using PHITS Monte Carlo Simulations

Gokcekuyu,

Ekinci,

Buyuksungur

et al. 2024

Applied Sciences

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This study investigates the absorption of X-rays in mandibular tissues by comparing real tissues with tissue-equivalent materials using the PHITS Monte Carlo simulation program. The simulation was conducted over a range of X-ray photon energies from 50 to 100 keV, with increments of 5 keV, to evaluate the dose absorbed by different tissues. Real tissues, such as the skin, parotid gland, and masseter muscle, were compared with their tissue-equivalent polymeric materials, including PMMA, Parylene N, and Teflon. The results showed that the real tissues generally absorbed more X-rays than their corresponding equivalents, especially at lower energy levels. For instance, at 50 keV, differences in the absorbed doses reached up to 50% for the masseter muscle and its equivalent, while this gap narrowed at higher energies. The study highlights the limitations of current tissue-equivalent materials in accurately simulating real tissue behavior, particularly in low-energy X-ray applications. These discrepancies suggest that utilizing tissue-equivalent materials may lead to less accurate medical imaging and radiotherapy dose calculations. Future research should focus on improving tissue-equivalent materials and validating simulation results with experimental data to ensure more reliable dosimetric outcomes. This study provides a foundation for refining radiation dose calculations and improving patient safety in clinical applications involving X-rays.

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Comparative analysis of the transmission properties of tissue equivalent materials

Cited by 3 publications

References 27 publications

Characterization of the Urethane Based Tissue Equivalent Substitute for Phantom Construction: Model Molding, XCOM and MCNPX Studies

Characterization of the Urethane Based Tissue Equivalent Substitute for Phantom Construction: Model Molding, XCOM and MCNPX Studies

X-ray spectrometry applied for determination of linear attenuation coefficient of tissue-equivalent materials

Comparison of X-Ray Absorption in Mandibular Tissues and Tissue-Equivalent Polymeric Materials Using PHITS Monte Carlo Simulations

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