Algorithm of zero static magnetic field in thermotherapy based on particle swarm optimization

In recent years, a thermotherapy based on magnetic fluid nanomaterials can be used not only to generate heat, but also to deliver and release drugs in the process of treatment, even if the tissue tumors is deep. Hence, the unique approach of magnetic fluid nanomaterials hyperthermia is becoming a promising treatment. However, the spread of nanomaterials to normal tissues around the tumor is inevitable. That is to say, it is impossible that the normal tissue round tumor is injured. Therefore, accurately controlling the heating boundary is a crucial factor. Several methods have been proposed to distinguish the normal tissue from the tumor in the process of thermotherapy. Results show that the algorithm based on PSO is capable of calculating of a zero static magnetic field strength in the process of thermotherapy.