Development of re-entrant type hyperthermia system for many different kinds of deep tumor

In this research，a new re-entrant type hyperthermia system was developed to heat many different kinds of deep tumorwithout contact. Below，the electromagnetic field and temperature this research are shown.(1) electromagnetic field and temperaturedistributions inside the cavity were estimated by 3d FEM. From these results，这是应该的，the proposed heating method useful for deep tumor hyperthermia.(2)re-entrant resonant cavity type hyperthermia system for deep tumors was设计和构造based on the computer simulations.开发系统条件a cavity， impedance matching unitan RF amplifier, an antenna，a computer. From the results of computer simulations and experimental heating这是可能的heat the deep tumor of about 2-5cm in diameter by using the different resonancemodes (TM010 and TM012-like-modes) without contact. Moving the position of the objectthe position of maximum temperature could be controlled. Comparing the computer simulation and theexperimental results， resonant frequencies agreed with each other with an error of 1%或少，与temperature distributions agreed with each other with an error of 10%.(3) influence ofelectromagnetic waves is a social big problem. Leaked electromagnetic field of the developed systemhardly bad influence on the circumferenceIt was found that the proposed heating system could beapplicable to heat many different kinds of tumors, noncontactcorresponding to the size and that position where it occurred。

In this research, a new re-entrant type hyperthermia system was developed to heat many different kinds of deep tumor without contact. Below, the main results of this research are shown.(1) The electromagnetic field and temperature distributions inside the cavity were estimated by 3-D FEM. From these results, it was shown that the proposed heating method was useful for deep tumor hyperthermia.(2) The re-entrant resonant cavity type hyperthermia system for deep tumors was designed and constructed based on the computer simulations.・Developed system consists of a cavity, impedance matching unit, an RF amplifier, an antenna, a computer.・From the results of computer simulations and experimental heating, it was possible to heat the deep tumor of about 2-5cm in diameter by using the different resonance modes (TM010 and TM012-like-modes) without contact.・Moving the position of the object, the position of maximum temperature could be controlled.・Comparing the computer simulation and the experimental results, resonant frequencies agreed with each other with an error of 1% or less, and temperature distributions agreed with each other with an error of 10%.(3) The influence of electromagnetic waves is a social big problem. Leaked electromagnetic field of the developed system hardly has bad influence on the circumferenceIt was found that the proposed heating system could be applicable to heat many different kinds of tumors, noncontact, corresponding to the size and that position where it occurred.