Iterative reconstruction for X-ray computed tomography using prior-image induced nonlocal regularization

US9558570B2 · kind B2 · utility

Assignee

• The Research Foundation for The State University of New York · US

Inventors

• Jerome Zhengrong Liang · Stony Brook, US
• Jianhua Ma · Alpharetta, US
• Hao Zhang · Diemelstraße, US
• William H. Moore · Fremont, US
• Hao Han · Shanghai, CN

Key dates

• Filing date: Apr 16, 2014
• Grant date: Jan 31, 2017
• Expiry date: Apr 16, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2211/424
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Disclosed is a method for performing X-ray Computed Tomography scanning, the method including acquiring a plurality of images of an object, obtaining an initial image from the plurality of images, calculating NonLocal weight of the initial image, utilizing a current image estimation and registered prior image, performing a successive over-relaxation optimization to yield a new image estimation with an intensity of the new image estimation equal or greater than zero, performing a cycle update, generating an image of the object utilizing the new image estimation obtained from the optimization, and outputting a resultant image.