Patent ID: 6400789
Filing Date: 2002-06-04
Classification: A61B,Y10S

Abstract:
A method for reconstructing a planar image slice in a CT scanner at a given axial position having a predetermined reconstruction angle and including a detector array having n rows, n being an integer greater than 1, said method comprising:acquiring X-ray attenuation data from the detector array along a predetermined portion of a helical scan path in a vicinity of the axial position corresponding to the planar image slice, wherein the predetermined portion has an angular extent that is generally equal to the reconstruction angle; processing the data to reconstruct an image of the slice, using data acquired substantially only along the predeternined portion of the scan path, acquiring data alone a second. successive portion of the helical scan path; and processing the data acquired along the second portion of the scan path to reconstruct a second image of the slice, said second image showing a change in the body of a subject at the axial position.