SU-E-I-105: Optimizing Bomb Squad X-Ray Systems for Incidental Human Exposures

Medical Physics
C HillF Cain

Abstract

A current terrorist tactic involves strapping an explosive device to a live victim. Technicians wishing to x-ray the device need to use appropriate exposures to create clear images while mitigating incidental health problems for the live victim. This project involves characterizing and optimizing a popular radiographic system in the explosive investigation community, both for general use and, more specifically, for generating x-rays with a human subject in the beam path. This project seeks to minimize the dose to a victim incidentally located in the beam path, while maximizing image quality, thereby allowing appropriate image evaluation to neutralize the explosive threat. Image quality and dose optimization begins with characterization of the x-ray source. The source in this study is an XRS-3, a portable device developed by Golden Engineering, which nominally produces a 270 kVp beam. Characterization of the beam involves verifying the actual kVp, as well as determining the average energy of the beam with various amounts of filtration added to the beam path. The kVp was verified using a noninvasive technique, utilizing the measurement of the dose attenuation through lead and then modeling the energy dependent attenuation curve o...Continue Reading

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