Development of thin microwave antenna inserted into endoscope for treatment of bile duct carcinoma

热疗是利用肿瘤组织与正常组织的热敏性差异进行肿瘤治疗的一种方法。有几种方法可以加热体内的癌细胞。在本研究中，采用腔内加热进行治疗。在这种治疗中，一根长长的柔性微波天线被插入内窥镜的钳子通道，并被引导到胆管。本研究根据动物实验结果确定了微波天线的规格，如天线的直径和长度。此外，还根据医生的意见对天线结构进行了改进。此外，还可以研究插入金属支架的天线的加热特性，这种支架经常用于胆道癌的治疗。结果发现，这种情况下的加热具有一些有效的特征。

The thermal treatment is one of the modalities for cancer treatment, utilizing the difference of thermal sensitivity between tumor and normal tissue. There are a few methods for heating the cancer cells inside the body. In this study, intracavitary heating is employed for treatment. In this treatment, a long flexible microwave antenna is inserted into the forceps channel of the endoscope and is led to the bile duct. In this study specifications of the microwave antenna such as diameter and length of the antenna were decided based on results of animal experiment. Moreover, the antenna structure was improved by opinion of medical doctors. In addition, heating characteristics of the antenna inserted into a metallic stent, which is frequently employed for treatment of bile duct carcinoma, could be investigated. As a result, some effective characteristics for the heating of this situation were found.