Weixin Deng, Xiaodong Chen, Jin Yang, Jiarui Ji, Yi Wang, Huaiyu Cai. Ultrasound Endoscopic Imaging Algorithm Based on Coded Excitation and Coherence Factor[J]. Laser & Optoelectronics Progress, 2019, 56(14): 141101
- Laser & Optoelectronics Progress
- Vol. 56, Issue 14, 141101 (2019)
Fig. 1. Principle of Golay coding to eliminate distance side lobes. (a) Autocorrection function of sequence A; (b) autocorrection function of sequence B; (c) sum of complementary sequence autocorrection functions
Fig. 2. Flow chart of CFCS algorithm
Fig. 3. Simulation results of coded excitation ultrasound imaging. (a) Barker coded excitation imaging; (b) coded excitation imaging of Golay complementary sequences
Fig. 4. Axial energy expansions of two coding methods (z=25 mm)
Fig. 5. Imaging simulation results of different algorithms. (a) SA algorithm; (b) CFSA algorithm; (c) CFBarkerSA algorithm; (d) CFCS algorithm
Fig. 6. Lateral energy expansions of four algorithms (z=30 mm)
Fig. 7. Axial energy expansions of four algorithms (z=25 mm)
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Table 1. Comparison between Golay coding and Barker coding
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Table 2. Parameters of Field II acoustic field simulation model
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Table 3. Lateral resolutions at different positions
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Table 4. Signal-to-noise ratios of images generated by different algorithms
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