Tong Wang, Wende Dong, Kang Shen, Songde Liu, Wen Liu, Chao Tian. Sparse-View Photoacoustic Image Quality Enhancement Based on a Modified U-Net[J]. Laser & Optoelectronics Progress, 2022, 59(6): 0617022
- Laser & Optoelectronics Progress
- Vol. 59, Issue 6, 0617022 (2022)
Fig. 1. Architecture of the modified U-Net. (a) Conventional U-Net network; (b) modified skip connection network
Fig. 2. Reconstruction results on simulation dataset. (a) (e) Images reconstructed by an iterative algorithm; (b) (f) U-Net outputs; (c) (g) modified U-Net outputs; (d) (h) reference images
Fig. 3. Comparison of profiles labeled by arrows in Fig. 2 (d) and (h). (a) N=32; (b) N=128
Fig. 4. Reconstruction results of a cross section of the liver of a mouse on experimental dataset. (a) Position of imaging; (b) (f) images reconstructed by an iterative algorithm; (c) (g) U-Net outputs; (d) (h) modified U-Net outputs; (e) demonstration of liver area; (i) reference image
Fig. 5. Reconstruction results of a cross section of the spleen of a mouse on experimental dataset. (a) Position of imaging; (b)(f) images reconstructed by an iterative algorithm; (c) (g) U-Net outputs; (d) (h) modified U-Net outputs; (e) demonstration of spleen area; (i) reference image
Fig. 6. Comparison of training losses and validating losses during training process. (a) Simulation dataset, element number N=32; (b) simulation dataset, element number N=128; (c) experimental dataset, element number N=32;(d) experimental dataset, element number N=128
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Table 1. Quantitative comparisons of different methods on simulation dataset
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Table 2. Quantitative comparisons of different methods on experimental dataset
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Table 3. Results of ablation experiment
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