一种适用于激光磁共振成像的磁场补偿装置  

A magnetic field compensation system for laser MRI

作　　者：赵武贻[1,2] 王慧贤[1] 王铮[1] 张玉霞[1] 杨文晖[1] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《电工电能新技术》2012年第4期71-74,共4页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金青年基金资助项目(50807050)

摘　　要：提出了一种适用于激光磁共振成像的磁场补偿装置,该装置可以与磁场循环系统集成在一起,实现对静止样品成像。文中首先根据实验要求对线圈产生的磁场进行了仿真,并制作出了实际的线圈,然后搭建了一种反馈型高精度恒流源,其长期工作时的稳定性优于2×10-4A。该补偿装置可将目标区域的地磁场抵消到100nT以内,基本满足激光磁共振成像的要求。A magnetic field compensation system has been developed for laser MRI. It can be integrated with the magnetic cycling system, extending the applicability of laser MRI to a stationary sample. According to the requirement of laser MRI, a simulation of the magnetic field has been done and the coils have been built. Then a feedback high precision constant current source has been developed. The results show that the earth magnetic field in the target area can be reduced to below 100nT, and the long term stability is better than 2 ×10^（-4）A.

关 键 词：激光磁共振成像 亥姆霍兹线圈 恒流源 

分 类 号：TM153.5[电气工程—电工理论与新技术]