Assessing X ray Contamination from Neighboring Sources in the US Army Research Laboratory's (ARL's) Multi Energy Flash Computed Tomography Diagnostic
Technical Report,01 Oct 2017,31 Jul 2018
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD ABERDEEN PROVING GROUND United States
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The US Army Research Laboratory and Lawrence Livermore National Laboratory have recently constructed a Multi-Energy Flash Computed Tomography MEFCT diagnostic. The device uses multiple flash X-ray systems to acquire projection data of dynamic events from multiple perspectives. These views are then combined to compute three independent, time-sequenced volume reconstructions of the event. Since multiple sourcedetector pairs are used to collect the projection data, X-ray photons from some sources often contaminate neighboring detectors. This contamination is unique to the MEFCT system in the way it collects projection data and acts to complicate the mathematical reconstruction process and reduce the diagnostics overall resolution. This work assesses the neighbor source contamination and mathematically generates a set of correction images from an empirical dataset where multiple independent contamination events occurred. The correction images are then to be subtracted from the attenuation radiographs prior to the tomographic reconstruction to improve reconstruction quality.
- Nuclear Physics and Elementary Particle Physics
- Operations Research
- Test Facilities, Equipment and Methods