Acta Optica Sinica, Volume. 40, Issue 1, 0111017(2020)
Optimization of Detection Angle for Pinhole X-Ray Fluorescence Computed Tomography
Detection angle is closely related to background noise, detection sensitivity, signal-to-noise ratio, and other parameters in the study of tube-excited X-ray fluorescence computed tomography (XFCT) imaging. Accordingly, we simulate a polychromatic tube-excited XFCT imaging system with multi-pinhole collimator using Geant4 to investigate the effect of detection angle on the signal-to-noise ratio and the reconstructed image quality. By changing the tube voltage, mass fraction of gold nanometer solution, and diameter of the region of interest, the signal-to-noise ratio is calculated by simulating the detection processes of the X-ray fluorescence projection data and scattering noise at four angles: 60°, 90°, 120°, and 150°. The simulation results reveal that the signal-to-noise ratio and reconstructed image quality could be effectively improved by increasing the detection angle. For most circumstances, the highest signal-to-noise ratio could be obtained when the detection angle is set to 120°.
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Jing Guo, Peng Feng, Luzhen Deng, Yan Luo, Peng He, Biao Wei. Optimization of Detection Angle for Pinhole X-Ray Fluorescence Computed Tomography[J]. Acta Optica Sinica, 2020, 40(1): 0111017
Category: Special Issue on Computational Optical Imaging
Received: Jul. 23, 2019
Accepted: Oct. 8, 2019
Published Online: Jan. 6, 2020
The Author Email: Feng Peng (coe-fp@cqu.edu.cn), He Peng (penghe@cqu.edu.cn)