铁磁球杂散场磁共振成像
Stray Field Magnetic Resonance Tomography using Ferromagnetic Spheres
摘要：
描述了通过使用来自铁磁球的方位对称偶极磁场来获得二维和三维磁共振图像的方法。我们利用一个大的外部施加的磁场的存在下，一个完整的二维或三维的结构化渲染的样品可以获得没有运动的样品相对于球体的几何球体的对称属性。在外部磁场中以各种角度取向顺序定位集成的样品球系统提供了成功的计算机断层摄影图像重建所需的所有成像切片。与先前的扫描探头磁共振成像提议相比，在该成像协议中消除了相对于铁磁尖端扫描样本的要求是潜在的有价值的简化。
英文摘要：
The methodology for obtaining two- and three-dimensional magnetic resonance images by using azimuthally symmetric dipolar magnetic fields from ferromagnetic spheres is described. We utilize the symmetric property of a geometric sphere in the presence of a large externally applied magnetic field to demonstrate that a complete two- or three-dimensional structured rendering of a sample can be obtained without the motion of the sample relative to the sphere. Sequential positioning of the integrated sample-sphere system in an external magnetic field at various angular orientations provides all the required imaging slices for successful computerized tomographic image reconstruction. The elimination of the requirement to scan the sample relative to the ferromagnetic tip in this imaging protocol is a potentially valuable simplification compared to previous scanning probe magnetic resonance imaging proposals.
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