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- W3208301709 abstract "Magnetic hyperthermia destroys malignant cells by absorbing the heat generated by magnetic nanoparticles (MNPs) under an external AC magnetic field. One of the most influencing factors for such therapy is to control the heat generation within MNPs, which is highly relevant to applied AC magnetic field and used MNPs during treatment. This paper optimizes the intensity of magnetic field acting on MNPs by considering an optimum power dissipation of MNPs, which is obtained by using Nelder-Mead algorithm for a proposed objective function during the optimization procedure. The aim of the proposed objective function is to minimize the difference between the maximum treatment temperature and its upper safety value as much as possible. The optimization results can be used to investigate the injury degree for the proposed model by Arrhenius thermal damage model, and also to optimize the performance for the magnetic field strength on MNPs by the implicit function due to Rosensweig’s theory in this study. Simulation results demonstrate that the power dissipation of MNPs can quickly converge to an optimum value after less iterations during the optimization process, which can also result in an ideal treatment temperature profile and can further obtain the injury degree for different malignant cells, when a temperature-dependent blood perfusion rate is considered for the simulation. The magnetic field or the MNPs can also be optimized before the therapy under this optimal power dissipation for MNPs at this time. In addition, this study also reveals the evolution of treatment temperature due to two blood perfusion rates, namely temperature-dependent and constant models." @default.
- W3208301709 created "2021-11-08" @default.
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- W3208301709 date "2022-03-01" @default.
- W3208301709 modified "2023-09-27" @default.
- W3208301709 title "An optimization method for magnetic hyperthermia considering Nelder-Mead algorithm" @default.
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- W3208301709 doi "https://doi.org/10.1016/j.jmmm.2021.168730" @default.
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