Study of Millimeter and Submillimeter wave Catheter for a Irradiation Apparatus

在这个研究项目中，我们开发了一种适合于照射活体的导管装置，使用特殊设计的回旋加速器gyrotron FUIV作为辐射源。在中功率TE_<03>和TE_<32>模式下工作，频率分别为302 GHz和238 GHz。这是回旋管在活体辐射装置上的首次应用。对辐照样品的变性分布和表面温度的初步测量表明，它们适合于用于活体的普通辐射装置。测量活鼠的体表温度证实了癌症放射装置的正常运行。改进正在进行中，以增强纤细的导管波导和天线的亚毫米波的窄焦点，以允许更高频率的局部辐射。

In this research project, we have developed a catheter apparatus suitable for irradiation the living bodies using a specially designed gyrotron, GYROTRON FUIV, as a radiation source. The gyrotron is operated in both CW and pulsed regime at middle power TE_<03> and TE_<32> modes with frequencyies 302 GHz and 238 GHz. This is the first application of gyrotrons to radiation apparatus for the living body.Preliminary measurements on the denaturation distribution and the surface temperature of irradiated samples suggest that they are appropriate for the common radiation apparatus for the living body.Measurement of the surface temperature of a living rats confirms the normal operation of the radiation apparatus for a cancer. Improvements are underway to enhance the slim catheter waveguide and the narrow focus of submillimeter wave of the antenna to allow localized radiation at still higher frequencies.