Construction of voxel-based Portunus haanii phantom and its absorbed fractions and specific absorbed fractions calculation based on Monte Carlo simulations

Q1 Health Professions Radiation Medicine and Protection Pub Date : 2023-09-01 DOI:10.1016/j.radmp.2023.06.001

Yaqin Zhang , Chunhui Gong , Chang Guo , Peng Wang , Wenjun Wang , Pengtao Cao , Qiang Li , Yi Yang

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Abstract

Objective

To build the database of the absorbed fractions (AFs) and specific absorbed fractions (SAFs), in order to accurately assess the internal radiation dose in non-human biota.

Methods

A voxel-based Portunus haanii phantom was established based on the computed tomography (CT) images. A set of AFs and SAFs were calculated with Monte Carlo toolkit Geant4 for the emission of monoenergetic photons and electrons with energies ranging from 10 keV to 5 MeV.

Results

The mass of the voxel-based Portunus haanii phantom (392.2 g) was in agreement with the actual mass (389.2 g), indicating the reliability of the phantom. The calculated AFs and SAFs, based on the voxel-based Portunus haanii phantom, provided precise and reliable data for conducting internal radiation dose calculations specifically tailored to the Chinese Red Swimming Crab (Portunus haanii). The results indicated that the self-AFs and self-SAFs were affected by both the radiation energy and the mass of the source/target organ. Moreover, the AFs and SAFs for cross irradiation, were not only dependent on the energy and the mass of the target organ, but also on the relative position of the source and target organs.

Conclusion

These results serve as a valuable resource for accurately evaluating the internal radiation exposure of this species.

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基于体素的Portunus-hanii体模的构建及其吸收分数和基于蒙特卡罗模拟的特定吸收分数计算

目的建立吸收组分（AF）和比吸收组分数据库，以准确评估非人类生物区系的内部辐射剂量。方法在计算机断层扫描（CT）图像的基础上建立基于体素的Portunus-hanii体模。使用蒙特卡罗工具包Geant4计算了一组AF和SAF，用于发射能量范围为10的单能光子和电子keV至5MeV.结果基于体素的Portunus haanii体模的质量（392.2g）与实际质量一致（389.2g），表示体模的可靠性。计算的AF和SAF基于基于体素的Portunus haanii体模，为进行专门针对中国红梭子蟹（Portunus haanii）的内部辐射剂量计算提供了精确可靠的数据。结果表明，自身AF和自身SAFs受辐射能量和源/靶器官质量的影响。此外，交叉照射的AF和SAF不仅取决于靶器官的能量和质量，还取决于源器官和靶器官的相对位置。结论这些结果为准确评估该物种的内部辐射暴露提供了宝贵的资源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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