Affiliation of Author(s):自动化学院
Journal:AIP ADVANCES
Key Words:RECONSTRUCTION SIMULATION ALGORITHM
Abstract:A pair of 511KeV gamma-photons is generated during a positron annihilation. Their directions differ by 180 degrees. The moving path and energy information can be utilized to form the 3D imaging test method in industrial domain. However, the scattered gamma-photons are the major factors influencing the imaging precision of the test method. This study proposes a gamma-photon single scattering correction method from the perspective of spatial geometry. The method first determines possible scattering points when the scattered gamma-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 gamma-photons denotes the attenuation of the total scattered gamma-photons along its moving path. The corrected gamma-photons are obtained by deducting the scattered gamma-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 gamma-photons and improve the test accuracy. (C) 2018 Author(s).
ISSN No.:2158-3226
Translation or Not:no
Date of Publication:2018-03-01
Co-author:肖辉,ljt,陈皓
Correspondence Author:肖辉,Zhao Min,xiaohui
Date of Publication:2018-03-01