| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Extraction method of nanoparticles concentration distribution from magnetic particle image and its application in thermal damage of magnetic hyperthermia |
| Yundong Tang(汤云东)1,†, Ming Chen(陈鸣)1, Rodolfo C.C. Flesch2, and Tao Jin(金涛)3 |
1 College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China;
2 Departamento de Automação e Sistemas, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil;
3 College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China |
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Abstract Magnetic particle imaging (MPI) technology can generate a real-time magnetic nanoparticle (MNP) distribution image for biological tissues, and its use can overcome the limitations imposed in magnetic hyperthermia treatments by the unpredictable MNP distribution after the intratumoral injection of nanofluid. However, the MNP concentration distribution is generally difficult to be extracted from MPI images. This study proposes an approach to extract the corresponding concentration value of each pixel from an MPI image by a least squares method (LSM), which is then translated as MNP concentration distribution by an interpolation function. The resulting MPI-based concentration distribution is used to evaluate the treatment effect and the results are compared with the ones of two baseline cases under the same dose: uniform distribution and MPI-based distribution considering diffusion. Additionally, the treatment effect for all these cases is affected by the blood perfusion rate, which is also investigated deeply in this study. The results demonstrate that the proposed method can be used to effectively reconstruct the concentration distribution from MPI images, and that the weighted LSM considering a quartic polynomial for interpolation provides the best results with respect to other cases considered. Furthermore, the results show that the uniformity of MNP distribution has a positive correlation with both therapeutic temperature distribution and thermal damage degree for the same dose and a critical power dissipation value in the MNPs. The MNPs uniformity inside biological tissue can be improved by the diffusion behavior after the nanofluid injection, which can ultimately reflect as an improvement of treatment effect. In addition, the blood perfusion rate considering local temperature can have a positive effect on the treatment compared to the case which considers a constant value during magnetic hyperthermia.
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Received: 06 May 2023
Revised: 27 May 2023
Accepted manuscript online: 14 June 2023
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PACS:
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44.10.+i
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(Heat conduction)
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44.05.+e
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(Analytical and numerical techniques)
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87.85.J-
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(Biomaterials)
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Corresponding Authors:
Yundong Tang
E-mail: tangyundong@fzu.edu.cn
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Cite this article:
Yundong Tang(汤云东), Ming Chen(陈鸣), Rodolfo C.C. Flesch, and Tao Jin(金涛) Extraction method of nanoparticles concentration distribution from magnetic particle image and its application in thermal damage of magnetic hyperthermia 2023 Chin. Phys. B 32 094401
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