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中国科学院上海微系统与信息技术研究所自主研制了9通道心磁图仪,可在闹市区的简易磁屏蔽环境中稳定工作.本系统包含9个信号通道和3个参考通道,通过采集人体的36点心磁信号,可提供等磁图、伪电流密度图等一系列磁成像,供医生解读.本文主要基于该系统进行了完整的性能测试与评估,测得该系统多周期时域噪声水平优于4pT,系统带宽为DC-40Hz,9个信号通道的磁场-电压转换系数约为2500pT/V、系统摆率达0.3×106Φ0/s.目前,该系统已经成功采集接近50余例志愿者的心磁数据,为临床研究提供了极具价值的医学信息.
Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences has independently developed a 9-channel magnetocardiograph that can work stably in a simple magnetic shielding environment in the downtown area. The system includes 9 signal channels and 3 reference channels, 36-point magnetic signal, can provide a series of magnetic imaging, such as magnetic maps, pseudo-current density map for the doctor to interpret.This paper mainly based on the system for a complete performance test and evaluation of the system measured multi-cycle noise level is excellent At 4pT, the system bandwidth is DC-40Hz, the magnetic-to-voltage conversion coefficient of 9 signal channels is about 2500pT / V and the system slew rate is 0.3 × 106Φ0 / s. At present, the system has successfully collected nearly 50 volunteers Magnetocardiography provides clinically valuable medical information.