Patent ID: 7643605
Filing Date: 2010-01-05
Classification: A61B,G06T,Y10S

Abstract:
1. A method for forming an image of an object, the method comprising: (a) performing a cone-beam scan of the object in a scanning plane by using a cone-beam emitter and a detector to perform a half-circle scanning geometry so as to obtain projection data for a plurality of rows; (b) weighting the projection data with a weighting factor to produce weighted projection data, wherein the weighting factor decreases as the rows become farther from the scanning plane, wherein the weighting factor is a function of a weighting angle which is a function of the row and a scan angle, wherein the weighting angle is where β is the scan angle, m is a number of the row, ξ is a virtual detector sampling interval of the detector, and so is a distance from the emitter to an origin of the scanning geometry; and (c) forming the image from the weighted projection data.