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. 27, 2015
Filed:
May. 18, 2012
Xiaofeng Niu, Mundelein, IL (US);
Wenli Wang, Briarcliff Manor, NY (US);
Xiaofeng Niu, Mundelein, IL (US);
Wenli Wang, Briarcliff Manor, NY (US);
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Medical Systems Corporation, Otawara-shi, JP;
Abstract
A method and apparatus for smoothing random event data obtained from a Positron Emission Tomography (PET) scanner. The method includes obtaining initial random event data u(s, φ, t=0)=u(s, φ), corresponding to t=0, calculating second-order central differences u, uwith respect to s, φ, calculating a gradient u, using u=2(u+u)−λ(u−u), where λ is a constant parameter, and updating the random event data using u(s, φ, t)=u(s, φ, t)+Δt u, where Δt=t−t, t=0 in a first iteration, and Δt is greater than 0. The method repeats the steps of calculating the second-order central differences, calculating the gradient, and updating the random event data until a change in u(s, φ, t) from a previous iteration is less than a predetermined threshold value.