Image reconstruction based on energy-resolved image data from a photon-counting multi-bin detector

US10176602B2 · kind B2 · utility

Assignee

• Prismatic Sensors AB · SE

Inventors

• Fredrik Grönberg · Stockholm, SE
• Mats Persson · Västerhaninge, SE
• Hans Bornefalk · Vallentuna, SE

Key dates

• Filing date: Oct 30, 2017
• Grant date: Jan 8, 2019
• Expiry date: Oct 30, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2211/408
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

There is provided a method of image reconstruction based on energy-resolved image data from a photon-counting multi-bin detector or an intermediate storage. The method includes processing (S1) the energy-resolved image data by performing at least two separate basis decompositions using different number of basis functions for modeling linear attenuation, wherein a first basis decomposition is performed using a first smaller set of basis functions to obtain at least one first basis image representation, and wherein a second basis decomposition is performed using a second larger set of basis functions to obtain at least one second basis image representation. The method also includes reconstructing a first image based on the at least one first basis image representation obtained from the first basis decomposition, and combining the first image with information representative of the at least one second basis image representation.