The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2002
Filed:
Jun. 16, 2000
Dominic J. Heuscher, Aurora, OH (US);
Philips Medical Systems (Cleveland), Inc., Highland Heights, OH (US);
Abstract
Data collected from a cone beam scanner is reconstructed by defining a plurality of oblique surfaces ( ) which are reconstructed into a reconstruction cylinder (C). An interpolator ( ) identifies non-redundant rays that intersect a center point of each oblique surface ( ) along with rays tangent to surface rings on each oblique surface ( ). Data from the non-redundant rays is weighted by a first data processor ( ). A second data processor ( ) convolves the weighted data and passes it to a backprojector ( ) which backprojects the data into an image memory ( ). The oblique surface reconstruction technique facilitates the use of conventional two-dimensional convolution and backprojection techniques that enjoy relative computational simplicity and efficiency as well as three-dimensional reconstruction techniques that use a minimum number of projections. In addition, the oblique surface reconstruction technique facilitates accurate reconstruction of cone beam projections with over ten times the area of current multi-ring scanners.