G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/82 (2006.01) G01R 33/10 (2006.01) G01R 33/16 (2006.01)
Patent
CA 2103032
The surface of internal structure of diamagnetic and paramagnetic materials is imaged by measuring, preferably with a superconducting quantum interference device (SQUID) magnetometer (7), perturbations to an applied magnetic field resulting from variations in magnetic sus- ceptibility at an array of locations across the object (3). The array of perturbation measurements is processed to gen- erate a map of local susceptibilities. For implementation of susceptibility tomography, multiple arrays of perturbation signals for a plurality of relative orientations between the object, the field, and the measurement locations are pro- cessed to generate values for local susceptibility at selected sites within the object, such as along a selected sectional plane.
Lauder Alan
Wikswo John P. Jr.
E. I. Du Pont de Nemours And Company
Smart & Biggar
Vanderbilt University
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