System and method for statistical iterative reconstruction and material decomposition

US10679385B1 · kind B1 · utility

Assignee

• General Electric Company · US

Inventors

• Brian David Yanoff · Niskayuna, US
• Mingye Wu · Clifton Park, US
• Lin Fu · Niskayuna, US
• Peter Michael Edic · Albany, US
• Xue Rui · Clifton Park, US
• Geng Fu · Clifton Park, US
• Yannan Jin · Schenectady, US
• Fredrik Grönberg · Stockholm, SE

Key dates

• Filing date: Dec 17, 2018
• Grant date: Jun 9, 2020
• Expiry date: Dec 17, 2038

Classification

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

Abstract

A method for imaging an object to be reconstructed includes acquiring projection data corresponding to the object. Furthermore, the method includes generating a measured sinogram based on the acquired projection data and formulating a forward model, where the forward model is representative of a characteristic of the imaging system. In addition, the method includes generating an estimated sinogram based on an estimated image of the object and the forward model and formulating a statistical model based on at least one of pile-up characteristics and dead time characteristics of a detector of the imaging system. Moreover, the method includes determining an update corresponding to the estimated image based on the statistical model, the measured sinogram, and the estimated sinogram and updating the estimated image based on the determined update to generate an updated image of the object. Additionally, the method includes outputting a final image of the object.