使用铁磁探针的二维磁共振层析显微术
Two-Dimensional Magnetic Resonance Tomographic Microscopy using Ferromagnetic Probes
摘要：
我们介绍了计算机断层扫描显微镜的概念，在磁共振成像使用的磁场和场梯度从铁磁探头。我们调查的配置，其中一个二维样品的影响下，一个大的静态极化场，一个小的垂直射频场，和一个磁场从铁磁球。我们证明，尽管从微观磁球的领域的非均匀性和非线性的性质，计算机断层扫描的概念可以应用到获得适当的图像重建从原始光谱数据，通过顺序地改变相对的样品球的角取向。分析表明，最近提出的原子分辨率磁共振成像的离散周期性晶格平面使用铁磁探针也可以扩展到二维成像的非结晶样品的分辨率范围从微米到埃尺度。
英文摘要：
We introduce the concept of computerized tomographic microscopy in magnetic resonance imaging using the magnetic fields and field gradients from a ferromagnetic probe. We investigate a configuration where a two-dimensional sample is under the influence of a large static polarizing field, a small perpendicular radio-frequency field, and a magnetic field from a ferromagnetic sphere. We demonstrate that, despite the non-uniform and non-linear nature of the fields from a microscopic magnetic sphere, the concepts of computerized tomography can be applied to obtain proper image reconstruction from the original spectral data by sequentially varying the relative sample-sphere angular orientation. The analysis shows that the recent proposal for atomic resolution magnetic resonance imaging of discrete periodic crystal lattice planes using ferromagnetic probes can also be extended to two-dimensional imaging of non-crystalline samples with resolution ranging from micrometer to Angstrom scales.
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