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DETECTING AND QUANTIFYING MATERIALS IN CONTAINERS UTILIZING AN INVERSE ALGORITHM WITH ADAPTIVE REGULARIZATION

United States Patent Application

20160306068
A1
View the Complete Application at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
A method, system and computer program product for automatically detecting and quantifying materials in containers (e.g., luggage, storage containers, equipment or componentry for processing or handling). An X-ray radiograph of a container is generated. A set of materials of interest (e.g., plutonium, steel) is selected to determine if the object comprises or contains materials of interest. An estimate of the areal densities or thicknesses of each of the selected materials of interest is obtained by minimizing an objective function with respect to the areal densities or thicknesses for each of the selected materials of interest. Adaptive regularization is implemented in the objective function to improve optimization results by adding a constraint to the objective function, where the constraint penalizes the objective function for solutions that do not line up with a prior belief about the solution form (e.g., the solution should not be negative or especially noisy).
Deinert, Mark (Golden, CO), Gilbert, Andrew J. (Richland, WA), McDonald, Benjamin S. (Richland, WA), Robinson, Sean M. (Richland, WA), Jarman, Ken D. (Richland, WA), White, Tim A. (Richland, WA)
15/ 093,525
April 7, 2016
GOVERNMENT INTERESTS [0003] This invention was made with government support under Grant No. DE-AC05-76RLO1830 awarded by the U.S. Department of Energy. The U.S. government has certain rights in the invention.