We present an optically encoded photoacoustic (PA) flow imaging method based on optical-resolution PA microscopy. An intensity-modulated continuous-wave laser photothermally encodes the flowing medium, and a pulsed laser generates PA waves to image the encoded heat pattern. Flow speeds can be calculated by cross correlation. The method was validated in phantoms at flow speeds ranging from 0.23 to 11 mm/s. Venous blood flow speed in a mouse ear was also measured.
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机译：我们提出了基于光学分辨率PA显微镜的光学编码的光声（PA）流成像方法。强度调制连续波激光对流动的介质进行光热编码，脉冲激光产生PA波以对编码的热模式进行成像。流速可以通过互相关来计算。该方法在幻影中以0.23至11 mm / s的流速进行了验证。还测量了小鼠耳朵中的静脉血流速度。
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