Magnetic imager and method
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United States of America Patent
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Jul 22, 1997
Grant Date -
N/A
app pub date -
Sep 1, 1995
filing date -
Sep 1, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A magnetic imager 10 includes a generator 18 for practicing a method of applying a background magnetic field over a concealed object, with the object being effective to locally perturb the background field. The imager 10 also includes a sensor 20 for measuring perturbations of the background field to detect the object. In one embodiment, the background field is applied quasi-statically. And, the magnitude or rate of change of the perturbations may be measured for determining location, size, and/or condition of the object.
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