自从1961年 Javan 和 Bernett 发明了 He-Ne 激光,得到连续震荡的激光以后,He-Ne激光在医学上的应用日益广泛。1964年,Yeh 和 Cummins 首先利用 He-Ne 激光多普勒技术测定流体中聚苯乙烯的流速,此后这项技术在医学临床和科研中被广泛应用于脑、皮肤、内耳、心胸循环的研究。1972年,Riva 等人首先应用 LDT 研究血流动力学, Since 1961, Javan and Bernett invented the He-Ne laser to get continuous shock laser, He-Ne laser in medical applications is increasingly widespread. In 1964, Yeh and Cummins first used the He-Ne laser Doppler technique to measure the flow rate of polystyrene in the fluid. Since then, this technique has been widely used in the clinical and scientific research in the brain, skin, inner ear and cardio-thoracic circulation. In 1972, Riva et al first applied LDT to study hemodynamics,