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:
Mar. 25, 2008
Filed:
Jan. 20, 2004
Lambert Zijp, Amsterdam, NL;
Kevin John Brown, Crawley, GB;
David Jaffray, Etobicoke, CA;
Jeffrey H. Siewerdsen, Toronto, CA;
Marcel Van Herk, Amsterdam, NL;
Jan-jakob Sonke, Amsterdam, NL;
Lambert Zijp, Amsterdam, NL;
Kevin John Brown, Crawley, GB;
David Jaffray, Etobicoke, CA;
Jeffrey H. Siewerdsen, Toronto, CA;
Marcel van Herk, Amsterdam, NL;
Jan-Jakob Sonke, Amsterdam, NL;
Elekta AB (PUBL), Stockholm, SE;
Abstract
An apparatus, method and software module for selecting phase-correlated images from the output of a scanner such as a cone beam CT scanner operates by collapsing the images derived from the series from two dimensions to one dimension by summing the intensities of pixels along a dimension transverse to the one dimension, producing a further image from a composite of the one-dimensional images obtained from images in the series, analysing the further image for periodic patterns, and selecting from the series images having like phase in that periodic pattern. If desired, a plurality of reconstructions can be derived at different phases. The analysis of the further image for periodic patterns can include comparing the one-dimensional images therein, to identify a movement of features in that dimension. This allows (inter alia) the accurate determination of the breathing cycle in a patient and a concomitant improvement in the quality of CT scans by using phase-correlated images.