Method and apparatus of global de-noising for ct imaging

Details Method and apparatus of global de-noising for ct imaging Method and apparatus of global de-noising for ct imaging

A - Human Necessities

61

B

A61B 6/03 (2006.01)

Patent

CA 2605836

Raw cone beam tomography projection image data are taken from an object (202) and are denoised by a wavelet domain denoising technique (204) and at least one other denoising technique such as a digital reconstruction filter (210). The denoised projection image data are then reconstructed into the final tomography image (218) using a cone beam reconstruction algorithm, such as Feldkamp's algorithm.

Selon l'invention, des données d'image de projection tomographique à faisceau conique brutes sont prises d'un objet, et sont débruitées au moyen d'une technique de débruitage par ondelettes, et à l'aide d'au moins une autre technique de débruitage faisant par exemple appel à un filtre de reconstitution numérique. Les données d'image de projection débruitées sont ensuite utilisées pour reconstituer une image tomographique finale, au moyen d'un algorithme de reconstitution à faisceau conique, tel que l'algorithme de Feldkamp.

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