CT cone beam scanner with fast and complete data acquistion and

Details CT cone beam scanner with fast and complete data acquistion and CT cone beam scanner with fast and complete data acquistion and

1997-11-07

2000-01-11

Bruce, David Vernon

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378901, A61B 603

Patent

active

06014419&

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

REFERENCES:
patent: 5170439 (1992-12-01), Zeng et al.
patent: 5663995 (1997-09-01), Hu
patent: 5706325 (1998-01-01), Hu
patent: 5784481 (1998-07-01), Hu
patent: 5926521 (1999-07-01), Tam

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