角形励磁コイルを用いた磁気回路型磁気ハイパーサーミア用磁場発生装置の性能

抄録

  Magnetic Hyperthermia Treatment (MHT) is a method in which AC magnetic field is applied from outside the body to the magnetic material inserted around the cancer tissue to generate heat, and the cancer cells are locally heated and killed. Since the calorific value of the magnetic substance is proportional to the frequency of AC magnetic fields and AC magnetic field strength, it is necessary to generate a uniform AC magnetic field over a wide range. An AC magnetic field generator using a circular excitation coil is effective as a method to generate a uniform AC magnetic field in a relatively large space between the magnetic poles. However, leakage magnetic fields are also generated outside the space between the magnetic poles. In this paper, a square excitation coil was used instead of a circular excitation coil to suppress leakage magnetic fields.