射频消融仪中监测系统的研究

发布时间：2019-03-28 15:01

【摘要】：射频消融仪是近几十年内出现的一种新型的治疗肿瘤的仪器,特别是在治疗内脏肿瘤方面有突出的效果。射频消融技术是一种物理型治疗技术,主要是根据细胞受热死亡的原理来发挥治疗作用。在经过多年的研究和发展,以及在医学临床中的试验,射频消融技术已经越来越成熟。临床数据显示,该技术具有创伤性小,安全性高,治疗效果明显的特点,而且随着技术的发展,射频消融仪正向着小型化、智能化、低成本化的趋势发展,越来越不受环境因素的影响,使用起来也更加方便,当然最重要的是安全性也越来越高,因此受到了越来越多医院的青睐,给千万患者带来了福音。本文主要介绍了射频消融仪中的监测系统。它是射频消融仪中一个重要的组成子系统,实时监测着消融仪内部的电流、电压以及温度的变化。而电流,电压和温度正是消融仪发挥射频治疗作用的三个重要参数。本文设计的监测系统能够实时监测射频消融仪内部的电压值、电流值和温度值,还能计算实时功率的大小,最后通过PID控制器可以实现温度控制下的工作模式和功率控制下的工作模式。相比于传统的只有功率控制的射频消融仪,具有更丰富的功能选择,给使用者提供了更多的治疗方案。本课题首先从监测系统的功能需求分析和性能需求分析开始,给出了监测系统的总体设计方案,介绍了系统的总体框架和系统的电路组成情况,然后制作相对应的PCB板形成实物,最后把监测系统组装到配套的射频消融仪中进行功能测试和调试验证,对测试结果进行分析总结,并根据存在的不足对下一步工作做出展望。经过调试验证,本文中设计的监测系统能够让射频消融仪实现温度控制下和功率控制下的双模式可切换工作,丰富了消融仪的工作模式,提高了射频消融的治疗效果。监测系统能够正常监测消融仪中的电压值,电流值和温度值,并计算相应的功率大小并传给上位机显示出来。该系统具有高智能化,高精确度,高安全性的突出优点。
[Abstract]:Radiofrequency ablation apparatus (RFCA) is a new type of tumor therapy instrument in recent decades, especially in the treatment of visceral tumors. Radiofrequency ablation (RFCA) is a physical therapy technique, which is mainly based on the principle of cell death by heat. After many years of research and development, as well as medical clinical trials, radiofrequency ablation technology has become more and more mature. Clinical data show that the technique has the characteristics of small trauma, high safety and obvious therapeutic effect. With the development of the technology, the radiofrequency ablation instrument is developing towards miniaturization, intelligence and low cost. It is more and more not affected by environmental factors and is more convenient to use. The most important thing is that the safety is getting higher and higher, so it has been favored by more and more hospitals and brought the gospel to millions of patients. This paper mainly introduces the monitoring system of RF ablation instrument. It is an important sub-system of RF ablation instrument, which monitors the change of current, voltage and temperature in real-time. Current, voltage and temperature are the three important parameters of radiofrequency therapy. The monitoring system designed in this paper can monitor the voltage value, current value and temperature value of RF ablation instrument in real time, and can also calculate the real-time power. Finally, the working mode of temperature control and power control can be realized by PID controller. Compared with the traditional RF ablation instrument with only power control, it has more function choices and provides more therapeutic options for users. This paper begins with the functional requirement analysis and performance requirement analysis of the monitoring system, presents the overall design scheme of the monitoring system, and introduces the overall framework of the system and the circuit composition of the system. Then the corresponding PCB board is made to form the object. Finally, the monitoring system is assembled into the matching RF ablation apparatus for functional testing and debugging verification. The test results are analyzed and summarized, and the future work is prospected according to the existing shortcomings. After debugging and validating, the monitoring system designed in this paper can make the dual mode switching work under temperature control and power control, enrich the working mode of the device and improve the therapeutic effect of radiofrequency ablation. The monitoring system can monitor the voltage value, current value and temperature value of the erasure instrument normally, and calculate the corresponding power value and transmit it to the upper computer. The system has the outstanding advantages of high intelligence, high precision and high security.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH789;TP274

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