EPR Imaging

三位主要研究人员将继续他们目前的成果，通过电子顺磁共振(EPR)成像对化学感兴趣的体系进行多维成像。这项工作将侧重于减少数据采集时间，开发改进的图像重建算法，防止磁场控制的磁场梯度干扰，以及脉冲EPR成像。这些研究有望增强EPR成像应用于化学、材料和医学中的一些重要系统的可能性。%这项研究在分析和表面化学的一般领域，集中在研究人员先前在电子顺磁共振成像方面的工作的扩展。通常的电子顺磁共振实验报告的是样品和磁场的平均频谱。光谱提供了有关样品中未配对电子自旋密度的信息。在成像实验中，这种自旋密度被映射到样品上，以提供显示顺磁分子的位置和强度的三维图像。这种方法在材料科学、生物计量学研究和非均匀材料的化学方面具有潜力。

Three principal investigators will continue their present achievements of multidimensional images of chemically interesting system by electron paramagnetic resonance (EPR) imaging. The work will focus on obtaining a decrease in the data acquisition time, on developing improved algorithms for image reconstruction, on preventing magnetic field gradient interference with magnetic field control, and on pulsed EPR imaging. These studies promise to enhance the possibilities for the application of EPR imaging to a number of important systems in chemistry, materials, and medicine. %%% The research, in the general area of Analytical and Surface Chemistry, focuses on an extension of the investigators previous work on electron paramagnetic resonance imaging. The usual electron paramagnetic resonance experiment reports a spectrum averaged over the sample and the magnetic field. The spectrum provides information about the unpaired electron spin density in the sample. In imaging experiments this spin density is mapped over the sample to give a three dimensional image showing the location and intensity of the paramagnetic molecules. The approach has potential in materials science, biometical studies and in the chemistry of non-uniform materials.