Total Generalized Variation Constrained Weighted Least-Squares for Low-Dose Computed Tomography Reconstruction

Shanzhou Niu; Mengzhen Zhang; Yang Qiu; Shuo Li; Lijing Liang; Hong Liu; Guoliang Liu

doi:10.3788/LOP212853

Laser & Optoelectronics Progress, Volume. 60, Issue 4, 0411001(2023)

Total Generalized Variation Constrained Weighted Least-Squares for Low-Dose Computed Tomography Reconstruction

Shanzhou Niu^1、*, Mengzhen Zhang^1,1、">, Yang Qiu^1,1、">, Shuo Li^1,1、">, Lijing Liang^1,1、">, Hong Liu^1,1、">, and Guoliang Liu^2,2、">

Author Affiliations

¹Ganzhou Key Laboratory of Computational Imaging, School of Mathematics and Computer Science, Gannan Normal University, Ganzhou 341000, Jiangxi, China

²School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, Jiangxi, China

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Figures & Tables(9)

Fig. 1. Images of digital phantoms. (a) Shepp-Logan phantom; (b) Clock phantom

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Fig. 2. Shepp-Logan phantom images reconstructed by different methods. (a) Gibbs-WLS method; (b) DL-WLS method; (c) TV-WLS method; (d) TGV-WLS method

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Fig. 3. Zoomed-in views of Shepp-Logan phantom images. (a) Image reconstructed by Gibbs-WLS method; (b) image reconstructed by DL-WLS method; (c) image reconstructed by TV-WLS method; (d) image reconstructed by TGV-WLS method

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Fig. 4. SSIM and FSIM values of reconstructed results in Fig. 3

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Fig. 5. Clock phantom images reconstructed by different methods. (a) Gibbs-WLS method; (b) DL-WLS method; (c) TV-WLS method; (d) TGV-WLS method

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Fig. 6. SSIM and FSIM values reconstructed by different methods

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Fig. 7. CNR of ROI [three boxes shown in Fig. 1 (b)] in Fig. 5

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Table 1. RMSE and SNR of Shepp-Logan phantom images
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Table 1. RMSE and SNR of Shepp-Logan phantom images
Method Gibbs-WLS DL -WLS TV-WLS TGV-WLS
RMSE 0.0439 0.0334 0.0388 0.0329
SNR 24.30 26.66 25.36 26.80

Table 2. RMSE and SNR of Clock phantom images
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Table 2. RMSE and SNR of Clock phantom images
Method Gibbs-WLS DL-WLS TV-WLS TGV-WLS
RMSE 0.0906 0.0678 0.0794 0.0519
SNR 17.90 20.41 19.69 22.74

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Shanzhou Niu, Mengzhen Zhang, Yang Qiu, Shuo Li, Lijing Liang, Hong Liu, Guoliang Liu. Total Generalized Variation Constrained Weighted Least-Squares for Low-Dose Computed Tomography Reconstruction[J]. Laser & Optoelectronics Progress, 2023, 60(4): 0411001

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