中国物理B ›› 2010, Vol. 19 ›› Issue (8): 87802-087802.doi: 10.1088/1674-1056/19/8/087802

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

贾鹏翔1, 包尚联1, 张峰2, 闫镔2   

  1. (1)Beijing City Key Lab of Medical Physics and Engineering, Peking University, Beijing 100871, China; (2)China National Digital Switching System Engineering and Technological Research Center, Zhengzhou 450002, China
  • 收稿日期:2010-02-28 修回日期:2010-04-21 出版日期:2010-08-15 发布日期:2010-08-15
  • 基金资助:
    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) and the Joint Research Foundation of Beijing Education Committee, China (Grant No. JD100010607).

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

Jia Peng-Xiang(贾鹏翔)a), Zhang Feng(张峰)b), Yan Bin(闫镔)b), and Bao Shang-Lian (包尚联)a)†   

  1. a Beijing City Key Lab of Medical Physics and Engineering, Peking University, Beijing 100871, China; b China National Digital Switching System Engineering and Technological Research Center, Zhengzhou 450002, China
  • Received:2010-02-28 Revised:2010-04-21 Online:2010-08-15 Published:2010-08-15
  • Supported by:
    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) and the Joint Research Foundation of Beijing Education Committee, China (Grant No. JD100010607).

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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.

Abstract: 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.

Key words: scattering correction, Monte Carlo simulation, panel detector, cone beam computed tomography system

中图分类号:  (Computed radiography)

  • 87.59.bd
02.50.Ng (Distribution theory and Monte Carlo studies) 87.57.C- (Image quality) 87.57.N- (Image analysis) 87.63.-d (Non-ionizing radiation equipment and techniques)