面向超导心磁图仪应用的环境评估方法  

Environmental assessment method for application of superconducting magnetocardiography

作　　者：王毅[1,2,3] 陈威[1,2] 孔祥燕 张朝祥[1,2] 张树林[1,2] 王永良[1,2] WANG Yi;CHEN Wei;KONG Xiangyan;ZHANG Chaoxiang;ZHANG Shulin;WANG Yongliang(State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;Center for Excellence in Superconducting Electronics,Chinese Academy of Sciences,Shanghai 200050,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海微系统与信息技术研究所信息功能材料国家重点实验室,上海200050 [2]中国科学院超导电子学卓越创新中心,上海200050 [3]中国科学院大学,北京100049

出　　处：《现代电子技术》2019年第10期1-4,共4页Modern Electronics Technique

基　　金：上海市自然科学基金(17ZR1436100);上海市张江国家创新示范区重点项目专项发展资金(201505-JDC104-060)~~

摘　　要：无屏蔽低温超导心磁图仪在临床应用推进中逐渐凸显环境适应性问题,需要对安装地点进行全面的电磁环境和地坪震动评估。通过分析心磁图仪系统理论输出模型和已具备的噪声抑制手段,低频的环境磁场和震动仍是系统输出的重要干扰因素。采用磁通门梯度计和加速度计,基于LabVIEW平台研制开发环境监测系统,实地获取应用环境的磁场、磁场梯度和地坪震动信息,通过分析采样数据的时域、频域特征和样本统计分布特征,优选出符合条件的场地,目前已完成两家医院选址评估。心磁系统环境噪声采样经多周期平均处理后优于2.5 pT,满足心磁采样要求,目前两家医院累计完成临床心磁采样700余例。结果表明,此环境评估方法将有助于加速心磁图仪应用推广和国内首个心磁数据库的筹建。The environmental adaptability problem gradually emerges in the advancement of clinical applications of the unshielded low-temperature superconducting magnetocardiography(MCG),so it is necessary to conduct comprehensive evaluation of electromagnetic environment and ground vibration for installation sites.It is found that the low-frequency environment magnetic field and vibration are considered as the important interference factors of the system output by analyzing the theoretical output model of the MCG system and the available noise suppression methods.The environment monitoring system is developed on the basis of the LabVIEW platform by using the fluxgate gradiometer and accelerometer to obtain the information of magnetic field, magnetic field gradient and ground vibration in the application environment on site.The sites in accordance with the conditions are optimally selected by analyzing the time domain and frequency domain characteristics of the sampling data,and sample statistical distribution characteristics.The site selection assessment of two hospitals has been completed up to now.The environmental noise sampling of the MCG system after multi-period average processing is better than 2.5 pT,which can satisfy the MCG sampling requirement.More than 700 cases of clinical MCG sampling have been completed in the two hospitals up to now.The results show that the environmental assessment method can help speed up the application and promotion of the MCG and the preparation of the first MCG database in China.

关 键 词：超导心磁图仪 临床应用 环境评估 磁场梯度 地坪震动 心磁采样 

分 类 号：TN03-34[电子电信—物理电子学] TM936[电气工程—电力电子与电力传动]