光学学报, 2018, 38 (11): 1117002, 网络出版: 2019-05-09
基于字典学习的稀疏角度采样光声信号重建 
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Reconstruction for Sparse-View Sampling Photoacoustic Signals Based on Dictionary Learning
图 & 表
图 1. (a)字典学习算法流程;(b)基于字典学习的光声信号重建算法流程
Fig. 1. Flow charts of (a) dictionary learning algorithm and (b) photoacoustic signal reconstruction algorithm based on dictionary learning
图 3. (a)模拟出的光声数据;(b)图3(a)中白线处的信号
Fig. 3. (a) Simulated photoacoustic data; (b) signal at where marked with white line in Fig. 3 (a)
图 4. (a)初始随机字典;(b)从样本集中学习得到的字典
Fig. 4. (a) Initial random dictionary; (b) learned dictionary from sample set
图 5. (a)原始图像;(b) 160个采样点下的光声重建图像;(c) 40个采样点下的光声重建图像;(d) 40个采样点下基于所提算法的光声重建图像
Fig. 5. (a) Original image; (b) photoacoustic image reconstructed by measurement with 160 detector locations; (c) photoacoustic image reconstructed by measurement with 40 detector locations; (d) photoacoustic image reconstructed by measurement with 40 detector locations based on proposed algorithm in this paper
表 1算法实现中选取的关键参数
Table1. Selected key parameters in algorithm implementation
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表 2不同采样点数和信噪比下不同算法的峰值信噪比与结构相似度
Table2. PSNR and SSIM obtained with different algorithms under the conditions of different sampled points and SNRs
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黄凯, 陈平, 刘伟伟, 林列. 基于字典学习的稀疏角度采样光声信号重建[J]. 光学学报, 2018, 38(11): 1117002. Kai Huang, Ping Chen, Weiwei Liu, Lie Lin. Reconstruction for Sparse-View Sampling Photoacoustic Signals Based on Dictionary Learning[J]. Acta Optica Sinica, 2018, 38(11): 1117002.
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