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Stray Field Magnetic Resonance Tomography Using Ferromagnetic Spheres

Research Area: Nanofabrication Year: 2006
Type of Publication: Article Keywords: magnetic resonance, tomographic imaging, ferromagnetic spheres
Authors: Mladen Barbic; Axel Scherer
Journal: Journal of Magnetic Resonance Volume: 181
Number: 2 Pages: 223-228
Month: August
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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