【作者】 于锋；

【导师】 席晓莉； 王丽黎；

【作者基本信息】 西安理工大学 ， 通信与信息系统， 2008， 硕士

【摘要】 肿瘤的治疗一直是世界性的难题,手术,放疗和化疗仍然是治疗的主要手段,尽管传统治疗方法取得了长足的发展,但治疗效果徘徊不前,治疗费用较高,以及治疗过程给患者带来的损伤,仍然是阻碍肿瘤治疗学迅速发展的瓶颈问题。近年来,微波热疗技术相对于手术,放疗,化疗,由于其无创性,在肿瘤临床治疗中的应用越来越广泛;微波热疗无论从热生物学,还是从热疗设备方面都取得了很大进步,而且经过临床验证,得到了较好的效果,成为肿瘤治疗学的一个新的发展方向。由于微波热疗仪治疗肿瘤无创伤,毒副作用小,相对安全有效,所以研制微波热疗仪,能有效的利用微波治疗肿瘤,它的临床应用,对于提高癌症患者的生存率、延长患者生命、提高患者生存质量起着很大作用。本课题针对体表浅层肿瘤微波热疗的需求,研制了微波热疗仪的硬件及软件系统,并设计了适用于体表浅层肿瘤组织的微波热疗天线。本文设计的肿瘤微波热疗仪的硬件系统包括一个以AT89C52为核心的单片机主系统和以AT89C2051为核心的单片机从系统,主系统负责接口操作、总系统的运行,从系统主要调节并维持微波功率输出的稳定。软件系统能够使整个微波热疗仪系统灵活起来,方便地设定疗时,功率等参数,使微波热疗仪跟操作界面交互变得比较容易。最后经测试,该微波热疗系统工作稳定,性能可靠。本文采用HFSS软件进行了微波热疗天线设计与仿真,设计了在浅表肌肉组织中电场分布较好且反射系数较小的单元天线等角螺旋天线和阿基米德阵列天线。分析比较了单元天线和阵列天线的电场分布和S₁₁,最终给出了在工作频率下电场分布较合理,S₁₁较小的单元天线和阵列天线。更多还原

【Abstract】 Cancer treatment has been a worldwide problem all along, surgery, radiotherapy and chemotherapy treatment is still the main means, although the traditional method of treatment has been developed by a large scale, but the effect of the treatment is hanging back all the time, high costly treatment and the injure patients suffered in the therapeutic process, has still hindered the development of cancer treatment in the bottlenecks. In recent years, compared with surgery, radiotherapy and chemotherapy, by mean of its non-invasive, the technology of microwave hyperthermia has been applied more and more extensively in cancer clinical treatment. Whether from the heat biology or the equipment, microwave hyperthermia has made a great progress, and after clinical verification, it has got a perfect result, and became a new development direction in the cancer therapies.Because microwave hyperthermia treatment for cancer has non-invasive, less side effects, relatively safe and effective, thus its development can utilize microwave effectively to cure cancer, its clinical application, is playing a big role in improving the survival rate of cancer patients, to extend patients’ life and improve the quality of life. Aiming at the treatment for superficial muscle tissue, a microwave hyperthermia hardware and software systems was designed, and applied to the superficial muscle tissue, a microwave hyperthermia antenna was also designed.In the system of microwave hyperthermia for tumor which was designed in this paper, the hardware system includes a main system based on the MCU of AT89C52 and a subordinate system based on the AT89C2051, the main system is for the operating of the interface and the running of the system, subordinate system is for the regulating and maintaining the stability of the microwave power output. Software Features: software system can make the entire system flexible, the treatment time, power and other parameters easy to set, and made the interaction of the microwave hyperthermia and the interface easier. Under final test, the microwave hyperthermia system was stable and reliable.By means of the HFSS software, the antenna was simulated and designed in this paper. The elementary antenna equiangular spiral antenna and the array antenna were designed, for the superficial muscle tissue, its reflection coefficient is smaller and the electric field distribution is better. The elementary antenna and the array antenna’s electric field distribution and S₁₁ was analyzed and compared, and the antenna which electric field distribution was reasonable in the Working frequency and the S₁₁ which was smaller has been given finally.更多还原