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随着医疗设备的不断增加,高档、精密、大功率、贵重仪器的引进,对医疗用电提出了越来越高的要求。就医疗用电而言,笔者认为主要有两方面问题:一是医疗用电的人机安全;二是仪器良好性能的发挥。人机安全不言而喻,仪器性能良好发挥受诸多因素影响,接地装置的效果如何至关重要。例如一台磁共振系统,其机器本身及射频屏蔽的接地阻值必须满足≤1Ω和≤4Ω的要求,否
With the continuous increase of medical equipment, the introduction of high-grade, precise, high-powered, and valuable instruments has brought higher and higher requirements for medical power. As far as medical power is concerned, the author believes that there are two main problems: First, the human-machine safety of medical power; second, the good performance of the instrument. Human-machine security is self-evident, and the good performance of the instrument is affected by many factors, and how effective the grounding device is. For example, in a magnetic resonance system, the ground resistance of the machine itself and the RF shield must meet the requirements of ≤1Ω and ≤4Ω.