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:
Oct. 03, 1989
Filed:
Nov. 27, 1987
Karen L Lauro, Euclid, OH (US);
Richard A Sones, Cleveland Hts, OH (US);
Picker International, Inc., Highland Hts., OH (US);
Abstract
A fan beam of radiation (12) is projected on first and second detector arrays (18, 20). The detector arrays and fan beam are swept across a phantom (D). Fine wires (82) in the phantom each cast shadows over fractions of a plurality of the detectors during the sweep. Phantom images (44, 46) are generated from the first and second detector arrays with corresponding pixels of each image corresponding to the same path between a radiation source (10) and corresponding detectors in the arrays. A linear interpolation (50) interpolates the pixels of one of the images to shift their effective spatial position. A transform means (52) transforms the linear interpolated and second phantom image into at least one composite image (54). The linear interpolation is iteratively adjusted (C) to minimize phase change artifacts in corresponding pixels of the composite image. After the appropriate interpolation for each detector or group of detectors has been determined, the appropriate linear interpolations are stored (72). Thereafter, the stored linear interpolations are utilized each time a subject is examined.