Decomposition method and apparatus based on basis material combination

US10448904B2 · kind B2 · utility

Assignees

• TSINGHUA UNIVERSITY · CN
• NUCTECH COMPANY LIMITED · CN

Inventors

• Liang Li · Beijing, CN
• Zhiqiang Chen · Beijing, CN
• Kejun Kang · Beijing, CN
• Ziran Zhao · Beijing, CN
• Li Zhang · Beijing, CN
• Yuxiang Xing · Beijing, CN
• Tiao Zhao · Beijing, CN
• Jianmin Li · Beijing, CN
• Bicheng Liu · Beijing, CN
• Qian Yi · Beijing, CN

Key dates

• Filing date: Dec 26, 2018
• Grant date: Oct 22, 2019
• Expiry date: Dec 26, 2038

Classification

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

Abstract

The present disclosure provides a decomposition method based on basis material combination. In the present disclosure, a scanned object is divided into a plurality of regions, the basis material combinations used in each of the divided regions are different each other, and the scanned object is re-divided according to the re-determined equivalent atomic number of its each point until the change on decomposition coefficient meets certain conditions. Thereby, a decomposition method based on dynamic basis material combinations is realized, which reduces a decomposition error caused by improper selection of the basis material combination and improves the accuracy of the decomposition and substance identification of the multi-energy CT.