Scattering correction method for panel detector based cone beam computed tomography system  

作　　者：贾鹏翔 张峰 闫镔 包尚联 

机构地区：[1]Beijing City Key Lab of Medical Physics and Engineering,Peking University [2]China National Digital Switching System Engineering and Technological Research Center

出　　处：《Chinese Physics B》2010年第8期609-613,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.60672104 and 10527003);the National Basic Research Program of China(Grant No.2006CB705705);the Joint Research Foundation of Beijing Education Committee, China(Grant No.JD100010607)

摘　　要：A scattering correction method for a panel detector based cone beam computed tomography system is presented. First, the x-ray spectrum of the system is acquired by using the Monte Carlo simulation method. Secondly, scattered photon distribution is calculated and stored as correction matrixes by using the Monte Carlo simulation method according to scanned objects and computed tomography system specialties. Thirdly, scattered photons are removed from projection data by correction matrixes. A comparison of reconstruction image between before and after scattering correction demonstrates that the scattering correction method is effective for the panel detector based cone beam computed tomography system.A scattering correction method for a panel detector based cone beam computed tomography system is presented. First, the x-ray spectrum of the system is acquired by using the Monte Carlo simulation method. Secondly, scattered photon distribution is calculated and stored as correction matrixes by using the Monte Carlo simulation method according to scanned objects and computed tomography system specialties. Thirdly, scattered photons are removed from projection data by correction matrixes. A comparison of reconstruction image between before and after scattering correction demonstrates that the scattering correction method is effective for the panel detector based cone beam computed tomography system.

关 键 词：scattering correction Monte Carlo simulation panel detector cone beam computed tomography system 

分 类 号：TN215[电子电信—物理电子学]