边缘场成像中多功能调节的机械结构设计

发布时间：2018-01-07 23:30

  本文关键词：边缘场成像中多功能调节的机械结构设计　出处：《厦门大学学报(自然科学版)》2016年03期 　论文类型：期刊论文

  更多相关文章： 边缘场成像 机械结构 多功能调节 样品升降

【摘要】：在边缘场成像实验中,支撑样品运动的机械结构缺少调节环节,运动形式单一,样品外围共振线圈采用固定化形式,无法满足超强磁场周边不规则梯度场变化的要求.本文在前期研究基础上提出了一种多功能调节机械结构,该结构具有独立调节样品以及共振线圈姿态和位置的功能.在一维边缘场成像中保证样品和共振线圈的中心轴线可同时与梯度场中磁场方向平行,并且实现了成像过程中样品沿着磁场方向升降的方式;在三维边缘场魔角旋转成像过程中,可以保证样品和共振线圈均与磁场方向呈魔角角度,并且在样品旋转成像时一旦出现回波信号不好或者无回波的情况,还可以实现样品的实时性暂停和回转,以重新获取样品在该位置的信号.更重要的是该机械结构在三维成像过程中增加了样品的升降功能,可以在更高梯度场中获取样品更精细的图像.
[Abstract]:In the edge field imaging experiment, the mechanical structure supporting the motion of the sample is lack of adjusting link, the motion form is single, and the external resonance coil of the sample is immobilized. It can not meet the requirements of the irregular gradient field around the super strong magnetic field. In this paper, a multifunctional adjusting mechanical structure is proposed on the basis of previous research. The structure has the function of independently adjusting the sample and the orientation and position of the resonance coil. In the one-dimensional edge field imaging, the central axis of the sample and the resonance coil can be parallel to the magnetic field direction in the gradient field at the same time. The method of sample rising and falling along the direction of magnetic field is realized in the process of imaging. In the process of 3D edge field magic angle rotation imaging, both the sample and the resonance coil can be guaranteed to have a magic angle with the magnetic field direction, and once the echo signal is bad or no echo occurs in the sample rotation imaging. The real-time pause and rotation of the sample can also be realized in order to obtain the signal of the sample in this position again. More importantly, the mechanical structure increases the lifting function of the sample in the process of 3D imaging. A more refined image of the sample can be obtained in a higher gradient field.
【作者单位】： 厦门大学航空航天学院;厦门大学物理科学与技术学院;
【基金】：国家自然科学基金(21327001)
【分类号】：TH122
【正文快照】： (3):445-450.Citation:SHI J L,XUE W D,FENG W J,et al.Multi-functional Adjustable Mechanical Structure Designing in Stray Field Ima-ging[J].Journal of Xiamen University(Natural Science),2016,55(3):445-450.(in Chinese)边缘场成像区别于传统磁共振成像,它利用传，

本文编号：1394720