Template-Based Nuclide Identification Shielding Estimation
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Solution Overview
Problem
Conventional template-based nuclide identification methods are limited in determining shielding and activity information, requiring human intervention and being unsuitable for automated instruments or handheld devices used by first responders, as they struggle to accurately estimate shielding configuration and source activity due to complexity and variability in spectral data.
Innovation Solution
A method that computes effective areal density, atomic number, and activity for radio-nuclides by using templates and weighting factors, incorporating areal density and atomic number biasing coefficients, and dose-to-activity tables to estimate source activity and shielding, enabling automated and accurate identification suitable for handheld devices and first responders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If template-based nuclide identification methods are used, then nuclide identification accuracy is improved, but shielding and activity estimation capability deteriorates
Solution Approach 1:
The patent segments the spectral analysis into multiple components: template matching for nuclide identification, weighting factors for contribution assessment, and separate computation steps for areal density and activity estimation. This segmentation allows each component to be optimized independently, maintaining high identification accuracy while extracting shielding and activity information through dedicated computational pathways.
Solution Approach 2:
The patent transitions from one-dimensional nuclide identification to a multi-dimensional analysis that simultaneously determines shielding configuration, areal density, and activity. By adding these additional dimensions of information extraction from the spectral data, the system overcomes the limitation of conventional methods that only provide nuclide identification without shielding context.
2Measurement precision
If physics-based models with radiation transport codes are used, then shielding information accuracy is improved, but device complexity and automation difficulty worsen
Solution Approach 1:
The patent replaces complex physics-based radiation transport simulations with a computational methodology using templates, weighting factors, and mathematical computations. Instead of using intensive Monte Carlo simulations or radiation transport codes, the system uses processed spectral templates and algebraic computations to estimate shielding and activity, significantly reducing computational complexity while maintaining accuracy.
Solution Approach 2:
The patent changes the approach from solving complex physics equations to computing parameters based on template matching results. By transforming the problem into parameter estimation using weighting factors and areal density calculations, the system achieves shielding information extraction without requiring complex physics-based model construction or optimization.
3Productivity
If automated template-based methods are used, then productivity is improved, but measurement precision for shielding and activity deteriorates
Solution Approach 1:
The patent performs preliminary computations by pre-processing spectral templates and pre-calculating weighting factors. This preliminary action enables rapid automated processing while maintaining precision, as the complex computations are prepared in advance and only require straightforward multiplication and division operations during actual measurement, achieving both speed and accuracy.
Data Source
AI summary
According to one embodiment, a method for estimating an activity of one or more radio-nuclides includes receiving one or more templates, the one or more templates corresponding to one or more radio-nuclides which contribute to a probable solution, receiving one or more weighting factors, each weighting factor representing a contribution of one radio-nuclide to the probable solution, computing an effective areal density for each of the one more radio-nuclides, computing an effective atomic number (Z) for each of the one more radio-nuclides, computing an effective metric for each of the one or more radio-nuclides, and computing an estimated activity for each of the one or more radio-nuclides. In other embodiments, computer program products, systems, and other methods are presented for estimating an activity of one or more radio-nuclides.