X-ray measurement model and information-theoretic metric incorporating material variability with energy correlations

摘要

Extending our prior work, we propose a multi-energy X-ray measurement model incorporatingmaterial variability with energy correlations to enable the analysis and exploration of the per-formance of X-ray imaging and sensing systems. Based on this measurement model we provideanalytical expressions for the Cauchy-Schwarz mutual information (ICS) measure that quantifiesthe performance limits of an X-ray measurement system for the threat-detection task. We ana-lyze the performance of a prototypical X-ray measurement system to demonstrate the utility ofour proposed material variability measurement model.