Creating an experimental testbed for information-theoretic analysis of architectures for x-ray anomaly detection

David Coccarelli, Joel A. Greenberg, Sagar Mandava, Qian Gong, Liang Chih Huang, Amit Ashok, Michael E. Gehm

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Anomaly detection requires a system that can reliably convert measurements of an object into knowledge about that object. Previously, we have shown that an information-theoretic approach to the design and analysis of such systems provides insight into system performance as it pertains to architectural variations in source fluence, view number/angle, spectral resolution, and spatial resolution.1 However, this work was based on simulated measurements which, in turn, relied on assumptions made in our simulation models and virtual objects. In this work, we describe our experimental testbed capable of making transmission x-ray measurements. The spatial, spectral, and temporal resolution is sufficient to validate aspects of the simulation-based framework, including the forward models, bag packing techniques, and performance analysis. In our experimental CT system, designed baggage is placed on a rotation stage located between a tungsten-anode source and a spectroscopic detector array. The setup is able to measure a full 360° rotation with 18,000 views, each of which defines a 10 ms exposure of 1,536 detector elements, each with 64 spectral channels. Measurements were made of 1,000 bags that comprise 100 clutter instantiations each with 10 different target materials. Moreover, we develop a systematic way to generate bags representative of our desired clutter and target distributions. This gives the dataset a statistical significance valuable in future investigations.

Original languageEnglish (US)
Title of host publicationAnomaly Detection and Imaging with X-Rays (ADIX) II
EditorsEdward D. Franco, Mark A. Neifeld, Amit Ashok, Michael E. Gehm
PublisherSPIE
ISBN (Electronic)9781510608757
DOIs
StatePublished - 2017
EventAnomaly Detection and Imaging with X-Rays (ADIX) II 2017 - Anaheim, United States
Duration: Apr 12 2017Apr 13 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10187
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherAnomaly Detection and Imaging with X-Rays (ADIX) II 2017
CountryUnited States
CityAnaheim
Period4/12/174/13/17

Keywords

  • High Dimensionality
  • Information Theory
  • X-Ray System Architecture
  • X-Ray System Geometry

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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