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  NCJ Number: NCJ 241685   Add to Shopping cart   Find in a Library
  Title: Compact, Low-Cost Body Cavity Screening Device
  Document URL: PDF 
  Author(s): Erik Magnuson
  Date Published: 01/2013
  Page Count: 54
  Annotation: Electronic field tomography (EFT) was investigated as a method for developing a low-cost, non-invasive device to use in screening body cavities for concealed contraband.
  Abstract: Initial detection and operational requirements were developed from discussions with personnel in the California Department of Corrections as well as their counterparts in the Western United States. A laboratory prototype system was developed with fixed receive and transmit nodes. Images were reconstructed from both experimental and simulated data and were shown to be in good agreement. In order to overcome the inherent low resolution of EFT, a novel multi-frequency method was developed. Images acquired over the frequency range of 1 MHz to 20 MHz were used to build a linear model and decompose the different object types in the image, e.g., muscle, bone, plastic. The feasibility of the multi-frequency EFT method was demonstrated with simulated data and then with actual images. The designs for a new prototype using switching transceiver nodes were finalized. The method thus shows promise for the use of EFT as a detector of foreign objects within a non-uniform body tissue background despite the inherent low resolution of EFT images. The next phase of this project will fabricate, debug, and implement the transceiver electronics on a laboratory prototype, validate its operation on phantoms simulating human tissue and contrabands, and finally test it on human subjects (without concealed contraband). 56 figures
  Main Term(s): Corrections Equipment
  Index Term(s): Prison contraband ; Body cavity searches ; NIJ final report
  Sponsoring Agency: National Institute of Justice (NIJ)
US Department of Justice
Office of Justice Programs
United States of America
  Grant Number: 2007-DE-BX-K001
  Sale Source: NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
  Type: Report (Technical)
  Country: United States of America
  Language: English
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