Method and system for enhanced imaging of a scattering medium

G - Physics – 01 – N

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G01N 21/47 (2006.01) G01N 21/49 (2006.01) G01N 23/04 (2006.01) G01N 29/00 (2006.01)

Patent

CA 2384823

The present invention recognizes that contrary to intuitive expectations, sensitivity and resolution of the data for image reconstruction can be increased by decreasing the absorption or scattering mean free path length of the imaging source energy. Methods are disclosed in this respect for enhancing sensitivity and resolution in the imaging of scattering target media (116). In one method, source energy wavelength is selected to optimize scattering and absorption of the energy while maintaining measurable and acceptable detector signals (112). In another aspect of the invention, the scattering target medium (116) is radially compressed and the imaging source wavelength is then adjusted in conjunction with the compression to improve sensitivity and resolution.

La présente invention prend en compte le fait que, contrairement à ce que l'on prévoit intuitivement, la sensibilité et la résolution de données pour la reconstruction d'images peuvent être améliorées grâce à la diminution de la longueur de parcours libre d'élément d'absorption ou de diffusion de l'énergie source d'imagerie. Ainsi, la présente invention concerne des procédés permettant d'améliorer la sensibilité et la résolution de l'imagerie de milieux de diffusion cibles (116). Dans un procédé, la longueur d'onde d'énergie source est choisie pour optimiser la diffusion et l'absorption de l'énergie, des signaux de détection (112) restant acceptables et pouvant toujours être mesurés. Dans un autre aspect de l'invention, le milieu de diffusion cible (116) est comprimé radialement et la longueur d'onde source d'imagerie est ensuite ajustée en même temps que la compression afin d'améliorer la sensibilité et la résolution.

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