Patent ID: 7405692

Claim:
A system, comprising: two or more arrays spaced apart from each other to define an interrogation region therebetween, the arrays each being structured to turn about the interrogation region to interrogate a person in the interrogation region with electromagnetic radiation at one or more frequencies in a range of about 200 MHz to about 1 THz to provide corresponding interrogation signals; one or more processors operable to establish data corresponding to a topographical representation of the person determined from the interrogation signals and generate an output as a function of the data, the data corresponding to the topographical representation defining a volume of the person in the interrogation region; and a device responsive to the output to provide an indication to an operator if the person is suspected of carrying one or more concealed objects that pose a threat to security, wherein the one or more processors are operable to generate the data corresponding to the topographical representation of the person by combining image data sets of three-dimensional data.