毕业论文 --磁共振数字谱仪常见故障分析.doc

毕业设计（论文） 题目：磁共振数字谱仪常见故障分析 院（部）系 所 学 专 业 年级、班级 完成人姓名 指导教师姓名 专业技术职称 2010年 6月 1 日 摘要 磁共振成像（Magnetic Resonance Imaging,MRI）根据生物体内的磁性核在静磁场内产生共振信号的特性进行成像，具有图像分辨率高，成像参数多，可任意方向断层，对人体无电离辐射伤害等显著优点，成为当今最先进的医学成像方法之一，在临床上和科学研究中得到越来越多的应用。 谱仪是磁共振成像系统的关键设备，在整个系统中居于核心地位，负责整个磁共振成像系统的控制、射频信号发生、射频信号接收、梯度波形发生等功能，是成像序列运行与实现的物理平台。 所以谱仪的检修和维护是很重要的，平时就要多注意磁共振的使用和保养，出现问题时要及时检查并解决。 由于核磁的复杂，核磁的维修是一个比较复杂的过程，造成故障的原因也可能比较复杂，应该循序渐进，逐步排除故障的原因。本文通过对i-open 0.35TMRI数字谱仪所产生的故障分析，从而总结查找故障的基本方法。 关键词：MRI；谱仪；故障；维修方法 Abstract  MRI (Magnetic Resonance Imaging, MRI) based on in vivo nuclear magnetic resonance signals generated in the static magnetic field characteristic for imaging, high image resolution, image many parameters, faults can be in any direction, the human body without ionizing radiation damage, etc. significant advantages, as todays most advanced medical imaging methods in clinical and scientific research to get more and more applications. Spectrometer magnetic resonance imaging system is the key equipment in the whole system core position, responsible for the overall control of magnetic resonance imaging system, RF signal generation, RF signal reception, the gradient waveform generation function, operation and implementation of imaging sequences physical platform. So spectrometer repair and maintenance is very important, usually must pay more attention to the use of magnetic resonance and maintenance problems should be promptly checked and resolved. As the complexity of NMR, NMR repair is a relatively complex process, resulting in failure of the reasons may be more complex, should be gradual, step by step troubleshooting reasons. Based on the i-open 0.35TMRI digital spectrometer generated failure analysis, to summarize the basic troubleshooting methods. Keywords: MRI; spectrometer; fault; repair method PAGE PAGE 1