Fig. 1. Schematic diagram of the fan-beam XFCT system

Fig. 2. Projected sinograms. (a) Sinogram with absorption; (b) sinogram without absorption

Fig. 3. Some numerical simulation phantoms

Fig. 4. Schematic diagram of the neural network architecture

Fig. 5. Comparison of the projected sinograms. (a) (b) (c) Original sinograms; (d) (e) (f) corrected sinograms; (g) (h) (i) objective sinograms

Fig. 6. Comparison of reconstructed images of the projected sinograms. (a) (b) (c) Reconstructed original sinograms; (d) (e) (f) reconstructed corrected sinograms; (g) (h) (i) reconstructed objective sinograms

Fig. 7. Geant4 simulation imaging system

Fig. 8. Phantom parameters

Fig. 9. The incident X-ray energy spectrum

Fig. 10. Projection sinograms. (a) Uncorrected sinogram; (b) corrected sinogram

Fig. 11. Reconstructed images. (a) Uncorrected reconstructed image; (b) corrected reconstructed image

Fig. 12. The CNR values of the reconstructed images