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, 2003
Filed:
Nov. 10, 1998
Vladimir Y. Panin, Salt Lake City, UT (US);
Gengsheng Lawrence Zeng, Salt Lake City, UT (US);
Grant T. Gullberg, Salt Lake City, UT (US);
The University of Utah, Salt Lake City, UT (US);
Abstract
A method of constructing a non-uniform attenuation map ( ) of a subject for use in image reconstruction of SPECT data is provided. It includes collecting a population of a priori transmission images and storing them in an a priori image memory ( ). The transmission images not of the subject. Next, a cross-correlation matrix ( ) is generated from the population of transmission images. The eigenvectors ( ) of the cross-correlation matrix ( ) are calculated. A set of orthonormal basis vectors ( ) is generated from the eigenvectors ( ). A linear combination of the basis vectors ( ) is constructed ( ), and coefficients for the basis vectors are determined ( ) such that the linear combination thereof defines the non-uniform attenuation map ( ).