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1. (WO2018133003) CT THREE-DIMENSIONAL RECONSTRUCTION METHOD AND SYSTEM

Pub. No.:    WO/2018/133003    International Application No.:    PCT/CN2017/071694
Publication Date: Fri Jul 27 01:59:59 CEST 2018 International Filing Date: Fri Jan 20 00:59:59 CET 2017
IPC: A61B 6/03
G06T 17/00
Applicants: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
深圳先进技术研究院
Inventors: CHEN, Ken
陈垦
WANG, Cheng
王澄
QIN, Wenjian
秦文健
XIONG, Jing
熊璟
XIE, Yaoqin
谢耀钦
Title: CT THREE-DIMENSIONAL RECONSTRUCTION METHOD AND SYSTEM
Abstract:
A CT three-dimensional reconstruction method and system. The method comprises: sending to at least two lower-level computers a two-dimensional projection image obtained by performing computed tomography (CT) with at least two rotation angles of an X ray source (210) (110); controlling each of the lower-level computers to compute a projection matrix for each pixel point in the two-dimensional projection image received thereby, and saving the projection matrix to respective internal storages of each of the lower-level computers (120); controlling each of the lower-level computers to compute, on the basis of the projection matrix and a current iteration state of three-dimensional volume data to be reconstructed, an iteration decay component and returning the iteration decay component (130); updating, on the basis of the iteration decay component, the current iteration state (140); determining whether an iteration termination condition is met (150), if the iteration termination condition is not met, then returning to control each of the lower-level computers for the projection matrix and the current iteration state to compute the iteration decay component and return the same until the preset iteration termination condition is met; and if the iteration termination condition is met, then using the current iteration state after iteration terminates as a CT three-dimensional reproduction result (160).