Patent ID: 7550969
Filing Date: 2009-06-23
Classification: A61B,G01V,G03H

Abstract:
1. A system of security screening a body and attached object, comprising: a portal including at least one transmitter coil and at least one receiver coil, wherein said portal is configured to accommodate said body and attached object passing therethrough; wherein said transmitter coil is configured to generate a broadband electromagnetic field comprising a frequency domain electromagnetic field and/or time domain electromagnetic field that propagates through said body and attached object and interacts with said body and attached object to result in a scattered electromagnetic field; and wherein said receiver coil is configured to record said scattered electromagnetic field; and a computer configured to simulate a first background electromagnetic field existing within said portal when there is no body and attached object within said portal, to compute a first backscattering electromagnetic field obtainable by transmitting said scattered electromagnetic field from said receiver coil, to produce an image of electric conductivity and/or dielectric permittivity of said body and attached object, and to determine at least one characteristic of the attached object; wherein the computer is configured to produce the image by: