Systems and Methods for Classification of Radiation Energy Spectra
AssigneeRapiscan Holdings, Inc.
InventorsSteven Wayne Pauly, William Mark Richardson, Phillip John Boone
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Abstract
A method of determining if a radiation spectra comprises radiation corresponding to naturally occurring radiation material sources (NORM), the method including: gathering the radiation spectra; normalizing the gathered spectra by using one or more predefined normalization techniques; energy scaling the normalized spectra by using one or more energy scaling techniques; and determining materials corresponding to each energy reading in the scaled energy spectra for categorizing the determined materials into one or more predefined categories by using one or more classification algorithms.
Claims20
A radiation portal monitor comprising a plurality of detectors in data communication with a processing system wherein the processing system is configured to determine if a radiation spectrum comprises radiation corresponding to naturally occurring radiation material sources (NORM) by:
- generating a database of training spectra, each of the training spectra in the database representing a NORM material;
- gathering the radiation spectra;
- normalizing the gathered spectra by using one or more predefined normalization techniques;
- energy scaling the normalized spectra by using one or more energy scaling techniques;
- fitting the normalized and scaled spectra to each of the training spectra in the database;
- determining a residual of fitting the normalized and scaled spectra with respect to each of the training spectra;
- and
- identifying the normalized and scaled spectra as a NORM material based on the residual and a threshold value.
Dependencies are inferred from the claim text.