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Engineering Aviation Security Environments—Reduction of False Alarms in Computed Tomography-Based Screening of Checked Baggage (2013) / Chapter Skim
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3 Alternative Approaches for the Reduction of False Alarms
Pages 29-33

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From page 29...
... The number of cross-sections that a machine takes can be increased either by changing the current hardware or by passing a bag through the CT scanner multiple times in such a manner that the bag is positioned somewhat differently for each scan. When a bag is passed through the CT scanner multiple times, a natural decision-making situation arises -- that is, a decision rule is needed with respect to when a bag should be declared a possible threat and sent for manual inspection.
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From page 30...
... Then, the probability that such a bag will be sent for manual inspection is again obtained by using the binomial distribution as This is the probability of false alarm under the decision rule specified above. Different values of N and q lead to different PDs and PFAs.
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From page 31...
... This section deals with the use of mass spectrometry to address this charge. Box 3-1 features an extract a 2004 National Research Council report on the subject.
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From page 32...
... These tasks range from passenger screening at checkpoints to monitoring of the air handling system.3 1 National Research Council, Opportunities to Improve Airport Passenger Security Screening with Mass Spectrometry, The National Academies Press, Washington, D.C., 2004.
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From page 33...
... Standardized data interfaces for access control with facility security. 1 National Research Council, Fusion of Security System Data to Improve Airport Security, The National Academies Press, Washington, D.C., 2007, p.
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Key Terms

  • decision rule
  • improve airport
  • mass spectrometry
  • ionization methods
  • ambient ionization

  • correct detection
  • false alarm
  • mass spectrometers
  • diffraction technology
  • airport security

  • chemical specificity
  • manual inspection
  • security screening
  • current hardware
  • potential threat

  • sample preparation
  • using existing
  • recent advances
  • multiple scans
  • incorporating data

  • scanner multiple
  • transportation security
  • multiple times
  • rule specified
  • council report

  • passenger screening
  • machine takes
  • using mass
  • explosive trace
  • committee offers


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