Phased Array Imaging Algorithm for Endoscopic Ultrasound Based on Coded Excitation

Bian Guangyu; Wang Yi; Bai Baoping; Li Jiake; Chen Xiaodong

doi:10.3788/LOP55.011103

Laser & Optoelectronics Progress, Volume. 55, Issue 1, 11103(2018)

Phased Array Imaging Algorithm for Endoscopic Ultrasound Based on Coded Excitation

Bian Guangyu¹, Wang Yi^1、*, Bai Baoping², Li Jiake¹, and Chen Xiaodong¹

¹Ministry of Education Key Laboratory of Optoelectronic Information Technology, School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China

²Beijing Huaco Healthcare Technologies Incorporated Company, Beijing 100195, China

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Figures & Tables(8)

Fig. 1. Geometric representation of delay time computation

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Fig. 2. Principle of SA algorithm

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Fig. 3. Flow chart of LFM Barker SA algorithm

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Fig. 4. Simulation results of B-model ultrasound image (a) DAS algorithm; (b) Pulse SA algorithm; (c) LFM Barker SA algorithm

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Fig. 5. Axial distance of scattering points (z=25.77)

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Fig. 6. Lateral distance of scattering points (z=40.12)

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Table 1. Basic parameters of Field Ⅱ simulation model
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Table 1. Basic parameters of Field Ⅱ simulation model
Parameter Value
Sampling frequency /MHz 100
Center frequency /MHz 5
Speed of sound /(m·s^-1) 1540
Element width /mm 0.2400
Kerf /mm 0.0013
Bandwidth (relative) /MHz 0.6

Table 2. Lateral distances of image points in three algorithms
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Table 2. Lateral distances of image points in three algorithms
Position DAS /mm PulseSA /mm LFM BarkerSA /mm
z=25.77 1.04 0.76 0.76
z=30.15 1.23 0.91 0.91
z=35.13 1.47 1.06 1.05
z=50.09 2.11 1.52 1.48
z=55.00 2.16 1.68 1.63

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Bian Guangyu, Wang Yi, Bai Baoping, Li Jiake, Chen Xiaodong. Phased Array Imaging Algorithm for Endoscopic Ultrasound Based on Coded Excitation[J]. Laser & Optoelectronics Progress, 2018, 55(1): 11103

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