超强边缘磁场梯度场下的磁共振成像:STRAFI实验(英文)

Magnetic Resonance Imaging Using Strong Magnetic Field Gradients: A Review of the STRAFI Experiments

磁共振成像(MRI)是一个能够探测样品内部特性的有效检测手段,已被广泛应用于化学、生物研究,以及医疗诊断领域.自约40年前发展以来,成像方法的不断发展使得MRI的成像分辨率、实验效率和成像杂核能力得到了很大的改进.边缘磁场成像(STRAFI)是一种很具潜力的成像方法之一,它利用了超导磁体本身具有的边缘场的强梯度场.该综述介绍了STRAFI基础,并概括了成像的基本原理、STRAFI的实验理论和方法及其在实际研究中的应用.由此将比较STRAFI实验相对于传统MRI方法的所具有的优势和多面可行性.

Magnetic Resonance Imaging （MRI） is a valuable experimental method extensively used in chemical and biological research as well as medical diagnostics. It is highly sought after because of its non-invasive nature to examine deep inside the sample. Since its inception nearly 40 years ago, many imaging techniques have been developed to improve image resolution, ex- perimental efficiency, and expand its imaging capability with low gamma nuclei. One method that shows great potential is Stray Field Imaging （STRAFI） since it utilizes the strong gradients in the fringe field of superconducting magnets. This review provides a basic introduction to stray field imaging and will cover fundamental imaging theory, the theory and methods used to execute STRAFI experiments and a brief overview of its applications in research. By providing these details we hope to show the strengths and versatility of the STRAFI experiment where conventional MRI methods may fall short.