CT detection method and CT device

US10175182B2 · kind B2 · utility

Assignees

• Grandpect Company Limited · CN
• NUCTECH COMPANY LIMITED · CN

Inventors

• Yongshun Xiao · Beijing, CN
• Zhiqiang Chen · Beijing, CN
• Ming-Tung Chang · 林湖乡, CN
• Ziran Zhao · Beijing, CN

Key dates

• Filing date: Dec 22, 2015
• Grant date: Jan 8, 2019
• Expiry date: Dec 23, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2211/421
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A CT detection method is provided, comprising the steps of: (1) scanning circumferentially an object to be detected by means of X-ray according to a preset angle sampling value, which represents the number of sampling points in one circle, so as to obtain a group of projection sampling data in different projection angles, the preset angle sampling value being greater than 1000; (2) processing the projection sampling data so as to obtain projection data of a plurality of virtual sub-focuses equivalent to a large focus of radiation source in a CT system; and (3) implementing an image reconstruction according to the projection data of the plurality of virtual sub-focuses.