Patent Document ID: 9861323
Application ID: 14065864
Patent Status: 1

Claim One:
1. A method for obtaining tomosynthesis images of an object of interest using an imaging system, wherein the imaging system comprises an X-ray source with an X-ray tube facing a detector on which the object of interest is positioned, the method comprising: acquiring a plurality of projected 2D images of the object of interest in a plurality of orientations at which the X-ray source emits an X-ray beam, where the orientations are identified relative to the X-ray beam axis direction perpendicular to the detector, wherein a zero orientation is closest to the perpendicular; applying at least one filter to the acquired projected 2D images to obtain filtered, projection images of the object of interest, wherein at least one of the at least one filter applied to the acquired projected 2D images enhances high frequencies relative to low frequencies of the correspondingly obtained filtered projection images, wherein at least one of the at least one filter applied comprises an amplification factor which varies according to x, y coordinates of pixels in the plane of the acquired projected 2D images, and wherein at least one of the at least one filter is applied in the direction corresponding to an X-ray beam scanning direction in the acquired projected 2D images; wherein at least one of the at least one filter applied to the acquired projected 2D images is a sum of a low-pass filter and an amplification factor of a difference between a value of a pixel at a given point and a value filtered by a low-pass filter for the pixel at the given point, and wherein the low pass filter is applied as a Gaussian distribution over values of pixels within a predetermined window neighboring the pixel at the given point; and obtaining a set of tomosynthesis images of the object of interest from a backprojection of at least two of the filtered projection images, the set of tomosynthesis images being a filtered, reconstructed volume of the object of interest, wherein at least one of the at least one filter is an adaptive type filter.