Haijiao Zhang, Huihua Kong, Yonggang Sun. Weighted NLTV Reconstruction Algorithm Based on Structural Prior Information for Spectral CT[J]. Acta Optica Sinica, 2018, 38(8): 0811003
- Acta Optica Sinica
- Vol. 38, Issue 8, 0811003 (2018)
Fig. 1. Three transformations apply to head model. (a) TV operator; (b) NLTV operator; (c) RE_NLTV operator
Fig. 2. Energy spectrum of 120 kVp simulated voltages
Fig. 3. Two-dimensional image of the simulation model
Fig. 4. Reference images used in RI_NLTV algorithm. (a) For chapter 3.1; (b) for chapter 3.2
Fig. 5. Reconstructions with different algorithms under high and low noise level. (a) TV algorithm; (b) NLTV algorithm; (c) RE_NLTV algorithm; (d) RI_NLTV algorithm
Fig. 6. Convergence of different algorithms under the low noise level
Fig. 7. Reconstructions with different algorithms underthree energy bins. (a) TV algorithm; (b) NLTV algorithm; (c) RE_NLTV algorithm; (d) RI_NLTV algorithm
Fig. 8. Reconstructions with different algorithms under high and low noise level in the mouse model. (a) TV algorithm; (b) NLTV algorithm; (c) RE_NLTV algorithm; (d) RI_NLTV algorithm
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Table 1. Position and size of the corresponding material in the model
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Table 2. Evaluation parameters of reconstruction with different algorithms under high and low noise level
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Table 3. Evaluation parameter of different algorithms under three energy bins
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Table 4. Evaluation parameters of reconstruction with different algorithms under high and low noise level
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