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US 8,014,959 B2Granted
Population of background suppression lists from limited data in agent detection systems
AssigneeSparta, Inc.
InventorsPierre C. Trepagnier, Philip D. Henshaw
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Abstract
Methods and systems are disclosed for detection of agents such as pathogens or toxic substances and, in particular, to methods and systems for determining the most important background constituents to suppress in a sample, e.g., in a bulk aerosol sample, in order to reduce the probability of false alarms and improve the level of detection of potentially harmful airborne agents.
Claims15
A method for detecting a target constituent in a mixture of background constituents, comprising
- utilizing a measurement modality to interrogate the mixture with electromagnetic radiation so as to generate sample spectral data corresponding thereto,
- deriving principal components of the sample spectral data,
- applying a rotate-and-suppress (RAS) transformation to said principal components of the sample data to suppress a contribution of at least one background constituent contained in a suppression list of length X, where X is less than the number of independent components used to describe each constituent, and
- comparing said transformed principal components of the sample data with background-suppressed principal components of corresponding spectral data of a target constituent to determine whether said target constituent is present in the mixture.
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Dependencies are inferred from the claim text.