Patent ID: 6408088
Filing Date: 2002-06-18
Classification: A61B,G01N,Y10S

Abstract:
A system for producing a tomographic image of an object using data acquired from a single detector row in a helical scan, said system comprising an x-ray source and a single slice detector array, a processor coupled to said detector array and configured to:generate a helical weighting factor based on a gantry angle and a detector angle; generate a modified weighting factor based on the generated helical weighting factor by shifting the helical weighting factor in the view angle direction; and apply the modified weighting factor to the data, wherein said modified weighting factor Wf(&bgr;,&ggr;) is: Wf&it;(Î²,Î³)=&Sum;i=-ni=n&it;h&it;(i)&it;W&it;(Î²-i&it;â€ƒ&it;Î”Î²,Î³)where:&ggr; is the detector angle; &bgr; is the gantry angle; W(&bgr;,&ggr;) is the helical weighting coefficient; &Dgr;&bgr; is the shift along the view angle direction; and h(i) is the weighting applied to the ith shifted version.