Mingjuan Liao, Lei Li, Xiaojiao Duan, Dabing Chen, Fenglin Liu. Local Source-Translation CT Imaging for Testing In-Service High-Voltage Cables[J]. Acta Optica Sinica, 2022, 42(16): 1611002
- Acta Optica Sinica
- Vol. 42, Issue 16, 1611002 (2022)
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 50th 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
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Table 1. Scanning parameters of simulation
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Table 2. Quantification indexes of reconstructed images with different system parameters
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