Application of Photoacoustic Elastography Technique in Arterial Blood-Pressure Monitoring

Xiaoman Zhang; Cuncheng Weng; Lili Zhu; Jianyong Cai; Shulian Wu; Zhifang Li; Huaqin Wu; Hui Li

doi:10.3788/LOP56.161701

Laser & Optoelectronics Progress, Volume. 56, Issue 16, 161701(2019)

Application of Photoacoustic Elastography Technique in Arterial Blood-Pressure Monitoring

Xiaoman Zhang, Cuncheng Weng, Lili Zhu, Jianyong Cai, Shulian Wu, Zhifang Li, Huaqin Wu, and Hui Li^*

College of Photonic and Electronic Engineering, Fujian Normal University, Fujian Provincial Engineering Technology Research Center for OptoElectric Sensing Applicaiton, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Ministry of Education, Fuzhou, Fujian 350007, China

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Figures & Tables(9)

Fig. 1. Diagram of photoacoustic signal excitation and detection

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Fig. 2. Experimental system of photoacoustic imaging

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Fig. 3. System resolution measurement. (a) System resolution diagram; (b) photoacoustic signal of absorber

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Fig. 4. Measurement of outer diameter of blood vessel. (a) Measurement of outer diameter of PVC tube with vernier caliper; (b) measurement of inner diameter of vessel with vernier caliper; (c) establishment of vascular model

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Fig. 5. Measured inner diameter and outer diameter of blood vessel. (a) Variation of outer diameter of blood vessel with pressure; (b) measured vascular wall thickness by OCT; (c) measured results of external diameter, wall thickness, and inner diameter of blood vessels

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Fig. 6. Measurement of vessel photoacoustic signal. (a) Photoacoustic signal of vessel under different pressures; (b) actual measured value and photoacoustic measured value of inner diameter of blood vessel

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Table 1. Outer diameter of blood vessel under different pressures measured by pixel point normalization

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Table 1. Outer diameter of blood vessel under different pressures measured by pixel point normalization

P /kPa	N_pvc /pixel	D_{pvc_out} /mm	D_pixel /mm	N_vessel /pixel	D_{vessel_out} /mm
1.24	33	4.00±0.02	0.12±0.0006	33±1	4.00±0.14
2.48	33	4.00±0.02	0.12±0.0006	47±2	5.68±0.27
3.72	33	4.00±0.02	0.12±0.0006	50±1	6.05±0.15
4.96	33	4.00±0.02	0.12±0.0006	53±2	6.41±0.27
6.20	33	4.00±0.02	0.12±0.0006	55±1	6.66±0.15

Table 2. Wall thickness and inner diameter of blood vessel under different pressures measured by pixel point normalization

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Table 2. Wall thickness and inner diameter of blood vessel under different pressures measured by pixel point normalization

P /kPa	N_vessel /pixel	D_{vessel_out} /mm	T_{vessel_w} /mm	D_{vessel_inner} /mm
1.24	85±1	4.00±0.14	0.53±0.006	2.94±0.16
2.48	80±2	5.68±0.27	0.50±0.012	4.68±0.29
3.72	72±2	6.05±0.15	0.45±0.012	5.15±0.16
4.96	65±1	6.41±0.27	0.40±0.006	5.61±0.29
6.20	55±1	6.66±0.15	0.34±0.006	5.98±0.16

Table 3. Inner diameter of blood vessel under different pressures measured by photoacoustic imaging technique
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Table 3. Inner diameter of blood vessel under different pressures measured by photoacoustic imaging technique
P /kPa τ /μs D_{vessel_inner_PA} /mm
1.24 2.20±0.09 3.30±0.14
2.48 3.29±0.11 4.94±0.17
3.72 3.52±0.13 5.28±0.19
4.96 3.76±0.09 5.63±0.14
6.20 3.91±0.12 5.87±0.18

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Xiaoman Zhang, Cuncheng Weng, Lili Zhu, Jianyong Cai, Shulian Wu, Zhifang Li, Huaqin Wu, Hui Li. Application of Photoacoustic Elastography Technique in Arterial Blood-Pressure Monitoring[J]. Laser & Optoelectronics Progress, 2019, 56(16): 161701

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Paper Information

Category: Medical Optics and Biotechnology

Received: Jan. 14, 2019

Accepted: Mar. 22, 2019

Published Online: Aug. 5, 2019

The Author Email: Hui Li (hli@fjnu.edu.cn)

DOI:10.3788/LOP56.161701

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Outer diameter of blood vessel under different pressures measured by pixel point normalization

Table 1. Outer diameter of blood vessel under different pressures measured by pixel point normalization

Table 2. Wall thickness and inner diameter of blood vessel under different pressures measured by pixel point normalization

Table 2. Wall thickness and inner diameter of blood vessel under different pressures measured by pixel point normalization

Table 3. Inner diameter of blood vessel under different pressures measured by photoacoustic imaging technique

Table 3. Inner diameter of blood vessel under different pressures measured by photoacoustic imaging technique