Apparatus and method for imaging the structure of diamagnetic and paramagnetic objects
US5408178A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 17, 1991 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | May 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The surface or internal structure of diamagnetic and paramagnetic materials is imaged by measuring, preferably with a superconducting quantum interference device (SQUID) magnetometer, perturbations to an applied magnetic field resulting from variations in magnetic susceptibility at an array of locations across the object. The array of perturbation measurements is processed to generate a map of local susceptiblities. 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 processed to generate values for local susceptibility at selected sites within the object, such as along a selected sectional plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.