Simultaneous spatial and spectral mapping of flow using photoacoustic Doppler measurement.
Simultaneous spatial and spectral mapping of flow using photoacoustic Doppler measurement.
复制标题
使用光声多普勒测量对血流进行同步空间和光谱测绘。
作者：
A. Sheinfeld;S. Gilead;A. Eyal
我们演示了使用音调突发激发和时间门控频谱分析来光声多普勒映射未受扰动的血管模体和具有空间变化管腔的血管中的流动。该方法模拟脉冲多普勒超声，能够同时测量轴向位置和血流，并在较宽的平均速度范围内(3.5200 mm/S)完整地表征多普勒频谱。为了产生所需的光激励，使用了连续的连续激光光源和一个外部电光调制器。不同水平的狭窄在带有微米级碳颗粒流动悬浮液的C-flex管中模拟。沿血管不同点的光谱含量与轴向位置的二维图以及不同级别的扰动显示了该方法在表征流动不规则性方面的潜在用途。
We demonstrate the use of tone-burst excitation and time-gated spectral analysis for photoacoustic Doppler mapping of flow in an unperturbed vessel phantom and in a vessel with a spatially varying lumen. The method, which mimics pulsed Doppler ultrasound, enables simultaneous measurement of axial position and flow as well as complete characterization of the Doppler spectrum over a wide range of mean velocities (3.5 to 200 mm∕s). To generate the required optical excitation, a continuous cw laser source followed by an external electro-optic modulator is used. Stenoses at various levels are emulated in a C-flex tube with a flowing suspension of micrometer-scale carbon particles. Two-dimensional maps of spectral content versus axial position at different points along the vessel and for various levels of perturbations demonstrate the potential use of the method for characterization of flow irregularities.
影响因子：
3.5
作者：
Song, Liang;Maslov, Konstantin;Wang, Lihong V.
通讯作者：
Wang, Lihong V.