Fig. 1. Schematic diagram of radiographic system

Fig. 2. Schematic diagram of duplex-wire section radiography

Fig. 3. Ideal and actual projection value curves of duplex-wire profile

Fig. 4. Contrast transfer function curve

Fig. 5. CTF curves for different source-object distances

Fig. 6. CTF curves for different offset distances of duplex-wire IQI with source-object distance of 100 mm

Fig. 7. CTF curves for different offset distance of duplex-wire IQI with source-object distance of 200 mm

Fig. 8. CTF curves for different ray energies

Fig. 9. CTF curves for LSF with normal distribution of different characteristic sizes

Fig. 10. Relationship between image unsharpness and characteristic size of line spread function with normal distribution

Fig. 11. Comparison between interpolated and fitted CTF curves

Fig. 12. Petal-type electron accelerator x-ray source

Fig. 13. DR image and average section curve of duplex-wire type IQI with magnification of 1.00

Fig. 14. CTF curves with magnification of 1.00

Fig. 15. DR image and average section curve of duplex-wire type IQI with magnification of 9.40

Fig. 16. CTF curves with magnification of 9.40

Fig. 17. LSF curves with magnification of 9.40

Fig. 18. MTF curves with magnification of 9.40

Fig. 19. DR image and average section curve of duplex-wire type IQI with magnification of 2.23

Fig. 20. CTF curves with magnification of 2.23

Fig. 21. LSF curves with magnification of 2.23

Fig. 22. MTF curves with magnification of 2.23

Fig. 23. DR image and average section curve of duplex-wire type IQI with magnification of 1.00

Fig. 24. CTF curves with magnification of 1.00

Fig. 25. DR image and average section curve of duplex-wire type IQI with magnification of 8.90

Fig. 26. CTF curves with magnification of 8.90

Fig. 27. LSF curves with magnification of 8.90

Fig. 28. MTF curves with magnification of 8.90

Fig. 29. DR image and average section curve of duplex-wire type IQI with magnification of 3.43

Fig. 30. CTF curves with magnification of 3.43

Fig. 31. LSF curves with magnification of 3.43

Fig. 32. MTF curves with magnification of 3.43