公开(公告)号：US12148070B2

公开(公告)日：2024-11-19

申请号：US16963307

申请日：2019-01-24

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Xiyun Song ,  Jinghan Ye ,  Yanfei Mao ,  Chuanyong Bai ,  Andriy Andreyev ,  Gregory Doughty ,  Leonid Romanov ,  Zhiqiang Hu

IPC: G01T1/161 ,  A61B5/00 ,  G01T1/164 ,  G01T1/17 ,  G01T1/20 ,  G06T11/00

Abstract: An image reconstruction method includes: determining singles rates of radiation detectors in a frame of imaging data detected by the radiation detectors; determining an energy correction factor (Nwgt) for each radiation detector based on an energy spectrum distribution of gamma rays incident on the radiation detector during acquisition of the frame of imaging data; determining a singles live time correction factor for each radiation detector from the singles rate and the energy correction factor; determining a system coincidence live time correction factor from the system singles rate; for each line of response (LOR) connecting pairs of radiation detectors, determining a live time correction factor for the LOR from the determined singles live time correction factors of the pair of radiation detectors connected by the LOR and the determined system coincidence live time correction factor; and reconstructing the frame of imaging data using the determined LOR live time correction factors.