Laser & Optoelectronics Progress, Volume. 56, Issue 16, 161701(2019)
Application of Photoacoustic Elastography Technique in Arterial Blood-Pressure Monitoring
Based on the angio elastography principle, the variation in blood-vessel diameter with pressure is measured by the photoacoustic elastography technique. A characteristic time-domain model for photoacoustic signals is developed to analyze the information of the blood pressure-diameter relation. A series of digital signal-processing methods based on the Hilbert transform are used to obtain spatial distributions of elastic mechanical properties in tissues. Results demonstrate that the pressure and vessel diameter have a monotonously increasing relation with the photoacoustic-signal time interval, which can be used to dynamically and quickly detect changes in the vessel diameter. This method provides a theoretical basis for non-invasive ambulatory blood-pressure measurements by photoacoustic imaging.
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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
Category: Medical Optics and Biotechnology
Received: Jan. 14, 2019
Accepted: Mar. 22, 2019
Published Online: Aug. 5, 2019
The Author Email: Li Hui (hli@fjnu.edu.cn)