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Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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Improved X-ray baggage screening sensitivity with 'targetless' search training.

Alex Muhl-Richardson1, Maximilian G Parker2, Sergio A Recio2

  • 1Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK. am2662@cam.ac.uk.

Cognitive Research: Principles and Implications
|April 15, 2021
PubMed
Summary
This summary is machine-generated.

Training baggage screeners to ignore distractors, rather than focus on targets, significantly improves their ability to detect threats in X-ray security scans. This targetless training approach enhances visual search performance.

Keywords:
Distractor templatesTarget templatesTargetless searchTemplates for rejectionVisual searchX-ray baggage search

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Area of Science:

  • Cognitive Psychology
  • Human-Computer Interaction
  • Security Studies

Background:

  • Visual search relies on mental templates for targets or distractors.
  • X-ray baggage screening is challenging due to unpredictable targets and complex visual scenes.
  • Distractor suppression is key for efficient visual search in security contexts.

Purpose of the Study:

  • To investigate a 'targetless' training approach for X-ray baggage search.
  • To assess the effectiveness of distractor suppression training.
  • To evaluate the impact of rewards and semantic categories on training.

Main Methods:

  • Simulated X-ray baggage search task.
  • Comparison of targetless vs. target-based training.
  • Analysis of target detection sensitivity (d') and training variables.

Main Results:

  • Targetless training significantly improved target detection sensitivity (d').
  • Performance-contingent rewards and superordinate categories did not affect performance.
  • Benefits were more pronounced with less occluded stimuli.

Conclusions:

  • A counterintuitive targetless approach enhances baggage search training.
  • Distractor suppression principles are effective for improving security screening.
  • This method shows potential as a real-world training tool for X-ray screening.