Wire transfer function analysis for castellated dual-energy x-ray detectors

Area of Science:

• Medical Imaging and Instrumentation
• X-ray Detection Technology
• Security Screening Systems

Background:

• Aviation security relies heavily on advanced x-ray detection.
• Traditional detector arrays face limitations in spatial resolution and element count.
• Optimizing detector performance is key for enhanced security screening.

Purpose of the Study:

• To investigate the spatial resolving power of a novel castellated linear dual-energy x-ray detector array.
• To assess the impact of signal processing on detector performance.
• To evaluate the potential for reducing the number of x-ray sensing elements without compromising resolution.

Main Methods:

• Experimental measurement of spatial resolving power using a wire transfer function with varying lead wire gauges.
• Development of a numerical simulation to validate and explain empirical findings.
• Implementation of specialized processing techniques for castellated detector signals.

Main Results:

• The castellated detector array demonstrated effective spatial resolving power.
• Signal processing techniques successfully maintained spatial resolution.
• A significant 50% reduction in x-ray sensing elements was achieved.
• The results provide a foundation for further research into material discrimination.

Conclusions:

• The castellated linear dual-energy x-ray detector array offers a promising solution for aviation security.
• Signal processing is vital for optimizing the performance of reduced-element detector arrays.
• The array's design facilitates future investigations into advanced material discrimination capabilities.