福建师范大学光电与信息工程学院, 福建省光电传感应用技术工程研究中心, 医学光电科学与技术教育部重点实验室, 福建省光子技术重点实验室, 福建 福州 350007
基于血管弹性成像原理,利用光声成像技术测量不同压力作用下血管内径的变化情况,通过建立光声信号的时域特征模型,计算用于分析血压-管径特征关系的信息,再结合希尔伯特变换等数字信号处理方法进行分析,由此获得了组织中弹性力学性质的空间分布情况。实验结果表明:压力、血管管径与光声信号峰峰值的时间间隔呈单调递增的关系,该技术可用于快速、实时地检测血管直径的变化,为光声成像技术实现非侵入式动态血压测量提供了理论依据。
医用光学 光声信号 弹性成像技术 血管管径 压力 激光与光电子学进展
2019, 56(16): 161701
Author Affiliations
Abstract
1 College of Physics and Energy, Fujian Normal University, Fuzhou 350007, China
2 College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350007, China
In this Letter, we discuss Raman–Nath acousto-optic diffraction, and a new model of Raman–Nath acousto-optic diffraction is presented. The model is based on the individual and simultaneous occurrences of phase-grating diffraction and the Doppler effect and optical phase modulation and photon–phonon scattering. We find that the optical phase modulation can cause temporal and spatial fluctuations of the diffracted light power escaping from the acoustic field.
170.5120 Photoacoustic imaging 290.1350 Backscattering 290.4210 Multiple scattering 290.7050 Turbid media Chinese Optics Letters
2015, 13(10): 101701
