title: Wire transfer function analysis for castellated dual-energy x-ray detectors.
abstract: An investigation into the spatial resolving power of a castellated linear dual-energy x-ray detector array is reported. The detector was developed for use in aviation security screening applications. Experiments employing different gauges of lead wire are used to plot a wire transfer function. A numerical simulation is developed to predict and underpin the empirical results. The suitable processing of the castellated detector signals helps to maintain spatial resolving power while affording a 50% reduction in x-ray sensing elements. This encouraging result has formed the basis for an ongoing investigation into materials discrimination capability of the castellated detector array.
authors.affiliation: Vision Systems Group, School of Computing and Informatics, Nottingham Trent University, Newton Building, N225, Burton Street, Nottingham NG1 4BU, United Kingdom.
authors.forename: Jer Wang
authors.initials: JW
authors.lastname: Chan
authors.forename: James Paul Owain
authors.initials: JP
authors.lastname: Evans
authors.forename: Yen San
authors.initials: YS
authors.lastname: Yong
authors.forename: Andrew
authors.initials: A
authors.lastname: Monteith