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NCJRS Celebrates National Library Week April 12-18

National Library Week

Started in 1958, National Library Week is a nationwide observance celebrated by all types of libraries - including the NCJRS Virtual Library. NCJRS invites you to explore the breadth and scope of the NCJRS Virtual Library collection and services. With more than 220,000 collection documents and 60,000 online resources, including all known Office of Justice Programs works, it is one of the world’s largest criminal justice special collections.

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NCJRS Abstract

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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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