Apparatus and method for imaging the structure of diamagnetic and paramagnetic objects

摘要: The surface of internal structure 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 sus-ceptibility at array locations across the object (3). perturbation measurements processed gen-erate map local susceptibilities. For implementation susceptibility tomography, multiple arrays signals for plurality relative orientations between object, field, measurement are pro-cessed generate values selected sites within such as along sectional plane.