Development of Inadiation Antenna for Millimeter and Submillimeter wave Catheter Irradiation to Living Body

在本研究项目中，我们开发了一种适用于活体照射的插入式介质棒和平板天线的导管装置。这是使用插入式介质天线对生物样品进行毫米波和亚毫米波辐射的第一次应用。对牛肝脏进行的时间和插入深度依赖的照射试验证实了活体照射装置的正常工作，因为微波能很好地控制功率，只有被照射的局部受到破坏。辐照研究中对受照样品的变性区域和表面温度的测量结果表明，介质棒和片状天线适合作为肝癌和脑癌组织等活体组织的常用导管照射装置。进一步的研究正在改进细长的导管波导，并开发一种有效的天线来实现局部照射。

In this research project, we have developed a catheter apparatus with an insert dielectric rod and sheet antennas suitable for irradiation of a living body. This is the first application of millimeter-and submillimeter-wave irradiation using an insert dielectric antenna for a biological sample. Tests of time and insertion depth dependent irradiation of a cow liver confirm the normal operation of the irradiation apparatus for living bodies because only the irradiated local part is damaged by the power of microwave well controlledMeasurement results of the denaturation region and the surface temperature of irradiated samples in the irradiation study suggest that the dielectric rod and sheet antennas are appropriate for use as a common catheter irradiation apparatus for living bodies such as liver cancer and brain cancer tissues.Further developments are underway to improve the slim catheter waveguide and to develop an effective antenna to enable localized irradiation.