CT cone beam scanner with fast and complete data acquistion and accurate and efficient regional reconstruction

Year	Description
1997	Invention patented by Hui Hu on November 6th, 1997. Abstract: A method is provided for reconstructing an image of an object, for use in an imaging system wherein a detector is mounted for measuring radiation emanating in a cone beam of rays which converge at a focal point. The method includes the step of establishing relative movement between the cone beam focal point and the object along a composite scan path, comprising primary and supplementary scan path components, the supplementary path usefully comprising a linear or helical path. The method further includes acquiring a set of cone beam data of the object with the detector during movement along the supplementary scan path component, computing a set of values of an intermediate function from the cone beam data, each of said computed values having an associated location defined by a prespecified point grid lying on the detector plane, and employing each of the computed values in a back-projection operation to determine the value of a reconstruction function, for use in forming an image of the object. The method also includes a strategy of imaging longitudinally-unbounded object section by section
Source: selected by the editor from original sources.

Invention: CT cone beam scanner with fast and complete data acquistion and accurate and efficient regional reconstruction