Shanghai Jiang, Zhizhen Ma, Binbin Luo, Mingfu Zhao, Bin Tang, Shenghui Shi, Decao Wu, Xue Zou, Zourong Long, Mi Zhou. Geometric Correction of Fan-Beam X-Ray Fluorescence CT Based on Local Linear Relationship[J]. Acta Optica Sinica, 2021, 41(20): 2011002
- Acta Optica Sinica
- Vol. 41, Issue 20, 2011002 (2021)
Fig. 1. XFCT system. (a) Parallel hole collimated array detector; (b) pinhole collimated array detector
Fig. 2. Fan beam X-ray XFCT schematic
Fig. 3. Deviation of relative position between phantom and detector
Fig. 4. Geometric parameter correction flow chart
Fig. 5. Simulation model and related parameters. (a) Geant4 simulation model; (b) phantom parameters; (c) geometric offset parameters; (d) array detector parameters
Fig. 6. Incident X-ray energy spectrum energy spectrum collected by the fluorescence detection unit. (a) Incident X-ray energy spectrum; (b) energy spectrum collected by the fluorescence detection unit
Fig. 7. Projected sinogram
Fig. 8. Original reconstructed image
Fig. 9. Reconstruction image after offset correction. (a) Reconstructed image after x-axis offset correction; (b) reconstructed image after y-axis offset correction
Fig. 10. Offset parameter varies with the number of iterations. (a) x-axis offset parameter correction; (b) y-axis offset parameter correction
|
Table 1. SpeckCalc parameters
|
Table 2. Geometric parameter error domain and sampling interval
|
Table 3. Preset geometric parameters and corrected geometric parameters
|
Table 4. Quantitative comparison between the original image and the corrected image
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20