Fig. 1. Geometric model of L-STCT system

Fig. 2. 2D geometry model

Fig. 3. Data distribution in Radon space

Fig. 4. System area division

Fig. 5. Analysis of P points in each sub-area. (a) Area 1; (b) area 2; (c) area 3; (d) area 4

Fig. 6. Maximum projection coverage angle distribution in this system

Fig. 7. Maximum projection coverage angle distributions for light passing point M. (a) Horizontal line section view; (b) vertical line section view

Fig. 8. Simulation phantom

Fig. 9. Simulation results. (a) Reconstruction results for different source translation distances; (b) reconstruction results for different detector widths

Fig. 10. Magnified ROI images in Fig. 9(a)

Fig. 11. Reconstruction results obtained by changing distance from X-ray source to measured object

Fig. 12. Magnified ROI images in Fig. 11(a)

Fig. 13. Profiles along 50^th row of image reconstructed with different system parameters. (a) Different source translation distances; (b) different detector widths; (c) different distances from X-ray source to measured object

Fig. 14. Experimental system of L-STCT

Fig. 15. Comparison of reconstruction results. (a) s=120 mm; (b) s=250 mm; (c) cable is not immersed in water; (d) cable is immersed in water for 10 h

Fig. 16. Comparison of immersion results. (a) Standing for 25 min; (b) standing for 4.5 h

Fig. 17. Illustrations of scanning modes. (a) STCT; (b) L-STCT