Laser & Optoelectronics Progress, Volume. 61, Issue 8, 0837008(2024)
Projection Domain Denoising Method for Multi-Energy Computed Tomography via Dual-Stream Transformer
Figures & Tables(11)
Fig. 1. Structure diagram of the proposed DTE-PDN-based low-dose multi-energy CT denoising method
Fig. 6. Ablation experiment results of different loss function combinations. (a) Selected projection path; (b) linear attenuation coefficient curves
Fig. 7. Curves of the evaluation index of the chest slice processed by DTE-PDN trained by the hybrid loss with different weight combinations
Table 1. Evaluation index of abdomen slice test results from different methods
View tableTable 1. Evaluation index of abdomen slice test results from different methods
Energy /keV Index RICCS-SI［ 22 ］RED-CNN［ 23 ］DRN［ 9 ］TransCT［ 24 ］DTE-PDN 20‒80 PSNR /dB 33.9413 36.4773 37.0067 37.5022 37.8992 SSIM 0.9692 0.9852 0.9893 0.9950 0.9958 FSIM 0.9214 0.9515 0.9742 0.9963 0.9972 80‒100 PSNR /dB 34.3815 37.7927 38.0993 38.9681 39.2680 SSIM 0.9703 0.9883 0.9891 0.9975 0.9964 FSIM 0.9257 0.9543 0.9760 0.9969 0.9976 100‒120 PSNR /dB 35.0164 38.7362 39.0957 39.5153 39.6702 SSIM 0.9755 0.9901 0.9933 0.9975 0.9977 FSIM 0.9248 0.9556 0.9770 0.9971 0.9971
Table 2. Evaluation index of chest slice test results from different methods
View tableTable 2. Evaluation index of chest slice test results from different methods
Energy /keV Index RICCS-SI［ 22 ］RED-CNN［ 23 ］DRN［ 9 ］TransCT［ 24 ］DTE-PDN 20‒80 PSNR /dB 34.8861 36.9783 37.3461 37.5323 37.7301 SSIM 0.9720 0.9873 0.9895 0.9927 0.9944 FSIM 0.9311 0.9550 0.9762 0.9977 0.9976 80‒100 PSNR /dB 36.4913 38.2874 38.6820 39.6757 39.7969 SSIM 0.9767 0.9892 0.9912 0.9956 0.9961 FSIM 0.9368 0.9568 0.9774 0.9977 0.9981 100‒120 PSNR /dB 37.3751 39.2031 39.6868 39.8529 39.8615 SSIM 0.9793 0.9906 0.9931 0.9981 0.9984 FSIM 0.9325 0.9566 0.9771 0.9983 0.9984
Table 3. Comparison of the mean and standard deviation among ROIs in test results from different methods
View tableTable 3. Comparison of the mean and standard deviation among ROIs in test results from different methods
ROI Energy /keV RICCS-SI［ 22 ］RED-CNN［ 23 ］DRN［ 9 ］TransCT［ 24 ］DTE-PDN ROI A 20‒80 0.2020±0.0042 0.2021±0.0030 0.2022±0.0027 0.2024±0.0019 0.2028±0.0017 80‒100 0.1771±0.0034 0.1769±0.0023 0.1770±0.0020 0.1773±0.0015 0.1770±0.0015 100‒120 0.1672±0.0030 0.1665±0.0021 0.1680±0.0018 0.1678±0.0014 0.1677±0.0013 ROI B 20‒80 0.2116±0.0043 0.2116±0.0031 0.2115±0.0032 0.2116±0.0028 0.2117±0.0028 80‒100 0.1829±0.0036 0.1826±0.0027 0.1827±0.0026 0.1830±0.0023 0.1829±0.0022 100‒120 0.1728±0.0033 0.1728±0.0026 0.1731±0.0024 0.1732±0.0021 0.1730±0.0020
Table 4. Evaluation index of abdomen and chest slices from DTE-PDN with different combination of blocks
View tableTable 4. Evaluation index of abdomen and chest slices from DTE-PDN with different combination of blocks
Slice STU LTU Residual
structure
20‒80 keV 80‒100 keV 100‒120 keV PSNR /dB SSIM FSIM PSNR /dB SSIM FSIM PSNR /dB SSIM FSIM Abdomen √ 37.4853 0.9871 0.9796 38.8544 0.9847 0.9803 39.1781 0.9855 0.9814 √ 37.4965 0.9872 0.9908 38.9568 0.9879 0.9856 39.2517 0.9867 0.9823 √ √ 37.6030 0.9922 0.9953 39.1961 0.9931 0.9939 39.5180 0.9919 0.9948 √ √ √ 37.8992 0.9964 0.9972 39.2680 0.9964 0.9972 39.6702 0.9977 0.9971 Chest √ 37.3112 0.9861 0.9788 39.0217 0.9876 0.9790 39.1171 0.9873 0.9819 √ 37.4083 0.9873 0.9854 39.1445 0.9908 0.9835 39.2718 0.9895 0.9831 √ √ 37.4846 0.9907 0.9952 39.6001 0.9929 0.9953 39.6792 0.9923 0.9954 √ √ √ 37.7301 0.9944 0.9976 39.7969 0.9961 0.9981 39.8615 0.9984 0.9984
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Shunxin Ouyang, Zaifeng Shi, Fanning Kong, Lili Zhang, Qingjie Cao. Projection Domain Denoising Method for Multi-Energy Computed Tomography via Dual-Stream Transformer[J]. Laser & Optoelectronics Progress, 2024, 61(8): 0837008
Paper Information
Category: Digital Image Processing
Received: Jun. 1, 2023
Accepted: Aug. 8, 2023
Published Online: Mar. 13, 2024
The Author Email: Shi Zaifeng (shizaifeng@tju.edu.cn)
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