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Spatial localization with single-sided NMR sensors

机译：单面NMR传感器的空间定位

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摘要

In the last years, special effort has been made to achieve spatial localization with single-sided nuclear magnetic resonance systems. The implementation of three-dimensional imaging techniques on such sensors converted the too] in a truly noninvasive open tomograph useful to resolve the structure of arbitrary large samples. This paper summarizes the strategy developed to incorporate spatial resolution on open sensors, and presents a number of applications that illustrate the performance of the technique in fields like quality control, medicine, and materials science. In some cases the structure of the sample under study changes only along the depth direction. To resolve the depth structure with high resolution, a sensor generating strong and highly uniform static gradient has been presented. This profiling tool quickly found important applications in resolving multilayer structures, where even dynamic processes happening at the surface of the sample can be followed in real time. In this work the method is used to study the efficiency of barrier layers included to stop the diffusion of solvents penetrating into the sample and to study aging processes that degrade the material structure. These examples demonstrate the potential of single-sided sensors to assist in the design of materials with improved proper-ties.
机译：在过去的几年中，已经做出了特殊的努力以利用单侧核磁共振系统实现空间定位。在此类传感器上实施三维成像技术，也将其转换为真正无创的开放式断层扫描仪，可用于解析任意大样本的结构。本文总结了将开放式传感器上的空间分辨率纳入其中的策略，并提出了许多应用实例，说明了该技术在质量控制，医学和材料科学等领域的性能。在某些情况下，被研究样品的结构仅沿深度方向变化。为了以高分辨率解析深度结构，已经提出了产生强且高度均匀的静态梯度的传感器。这种轮廓分析工具很快发现了在解析多层结构中的重要应用，甚至可以实时跟踪在样品表面发生的动态过程。在这项工作中，该方法用于研究所含阻挡层的效率，以阻止渗透到样品中的溶剂扩散，并研究使材料结构退化的老化过程。这些示例说明了单侧传感器在协助设计具有改进特性的材料方面的潜力。

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