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In this paper, a new method to set up the static magnetic field of the targeted magnetic fluid hyperthermia is presented based on the study of magnetic nanoparticles and biological heat transfer mechanism. Magnetic field generating system consists of 8 coils, deployed in the lesions of the peripheral symmetric space, the principle is to heat magnetic nanoparticles by high frequency alternating magnetic field, which kills the cancer cells, while building a static magnetic field in the periphery of tumor region to protect healthy tissue from harm. The invention can solve the technical problem that the heating area of the hyperthermia structure is not completely controllable.

A new method to set up the static magnetic field of the targeted magnetic fluid hyperthermia is presented, and a new particle swarm optimization algorithm with Levy flight (LF-PSO) is proposed. Magnetic field generating system consists of 18 coils, deployed in the lesions of the peripheral symmetric space, the main principle is to heat magnetic nanoparticles by high frequency alternating magnetic field to kill the cancer cells, while building a static magnetic field in the periphery of the tumor region to protect healthy tissue from harm. Tumor location information may be shifted, so each treatment needs to reconfigure the static magnetic field. The set of magnetic heating coil currently adopted this new LF-PSO algorithm, in the reason of the particle swarm optimization algorithm with Levy flight mechanism is characterized by good robustness, high precision of optimal search and it is easy to jump out of local optimum. Experimental results show that by building a new objective function, and comparing with the FEM algorithm, the LF-PSO algorithm has advantages of fast solving speed and high accuracy.