Patent ID: 6301325
Filing Date: 2001-10-09
Classification: A61B,Y10S

Abstract:
A method to be used with a CT system including a fan beam source and a multi-row detector, the source and detector arranged on opposite sides of a transport axis, the detector having first and second edges separated along the transport axis and having separate detector rows parallel to the edges, the source directing a fan beam including a central ray at the detector, each detector row subtended by a separate beam slice, the slices diverging from the central ray and including first and second edge slices which define beam edges orthogonal to the transport axis and which diverge from the central ray along a maximum fan angle .GAMMA., the method for generating a cross sectional image of an object along an image plane and comprising the steps of, with the source generating the fan beam:rotating the source and detector about the transport axis at a rotation rate;transporting the object relative to the fan beam at a transport rate relative to the rotation rate such that the image plane traverses the first and second detector edges after a partial rotation of the source about the transport axis;while rotating and transporting, collecting data corresponding to at least (.pi.+2.GAMMA.)/4.pi. rotation and less than one half rotation on either side of the image plane; andprocessing the collected data to generate the cross sectional image.