标题：
A study on scattering correction for γ-photon 3D imaging test method
点击次数：
所属单位：
自动化学院
发表刊物：
AIP Adv.
摘要：
A pair of 511KeV γ-photons is generated during a positron annihilation. Their directions differ by 180°. The moving path and energy information can be utilized to form the 3D imaging test method in industrial domain. However, the scattered γ-photons are the major factors influencing the imaging precision of the test method. This study proposes a γ-photon single scattering correction method from the perspective of spatial geometry. The method first determines possible scattering points when the scattered γ-photon pair hits the detector pair. The range of scattering angle can then be calculated according to the energy window. Finally, the number of scattered γ-photons denotes the attenuation of the total scattered γ-photons along its moving path. The corrected γ-photons are obtained by deducting the scattered γ-photons from the original ones. Two experiments are conducted to verify the effectiveness of the proposed scattering correction method. The results concluded that the proposed scattering correction method can efficiently correct scattered γ-photons and improve the test accuracy. © 2018 Author(s).
卷号：
8
期号：
3
是否译文：
否
发表时间：
2018-03-01
收录刊物：
EI
通讯作者：
肖辉
发表时间：
2018-03-01
学位：工学博士学位
职称：教授
所在单位：自动化学院