Normalized-constraint algorithm for minimizing...

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G01N 37/00 (2006.01) G01N 21/47 (2006.01) G01N 22/00 (2006.01) G01N 23/02 (2006.01)

Patent

CA 2473214

A method and system for minimizing inter-coefficient crosstalk in imaging the internal properties of a scattering medium. The method and system minimizing inter-coefficient crosstalk in image reconstruction by solving a system of linear perturbation equations with the use of relative detector values, weight matrix scaling, and constraints based on either the known or unknown direction of the perturbations in the medium's properties. The constraint being either (1) positive or negative corresponding to the direction of a known perturbations, or (2) solving the system of equations with both positivity and negativity constraints and summing the results when the direction of the perturbations are unknown. The advantages of the inventive method and system result in effective isolation of absorption and scattering coefficient variations, even for complex combinations of perturbations in these coefficients.

L'invention concerne un procédé et un système permettant de minimiser une diaphonie entre des coefficients dans l'imagerie des propriétés internes d'un milieu de diffusion. Lesdits procédé et système permettent de minimiser une diaphonie entre des coefficients dans une reconstruction d'image par résolution d'un système d'équations de perturbations linéaires à l'aide de valeurs de détection relatives, d'une mise à l'échelle de matrice pondérée, et de contraintes basées sur les sens connu ou inconnu des perturbations des propriétés du milieu. Les contraintes qui sont soit (1) positives soit négatives correspondent au sens de perturbations connues, ou (2) résolvent le système d'équations à l'aide de contraintes positives ou négatives et totalisent les résultats lorsque le sens des perturbations est inconnu. Les avantages de ces procédé et système sont une isolation efficace des variations de coefficients d'absorption et de diffusion même pour des combinaisons de perturbations complexes dans ces coefficients.

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