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Published April 1, 2004 | public
Journal Article Open

Two-dimensional magnetic resonance tomographic microscopy using ferromagnetic probes


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 nonuniform and nonlinear 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 noncrystalline samples with resolution ranging from micrometer to angstrom scales.

Additional Information

©2004 American Institute of Physics. (Received 10 October 2003; accepted 5 January 2004) This work was supported by the Army Research Office Grant No. DAAD 19-00-1-0392, and the Air Force Office for Scientific Research Grant F49620-01-1-0497.


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