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|1. (WO2018133003) CT THREE-DIMENSIONAL RECONSTRUCTION METHOD AND SYSTEM|
|Applicants:||SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY
|Title:||CT THREE-DIMENSIONAL RECONSTRUCTION METHOD AND SYSTEM|
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).