【Key words】 optical tomography； diffuse optical tomography； ultrasonic modulation； photoacoustics tomography； medicine imaging；
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The regulation for ultrasonic modulation of laser pulse spikes and the influence of modulation on drilling are studied.
对激光脉冲尖峰超声调制的一些规律及对打孔的影响进行了研究。
The experiments and analyses have proved that ultrasonic modulation can improve greatly the accuracy, surface finishing and reproducibility.
实验和分析表明，采用超声调制打孔可较大地改善打孔的精度、表面质量及打孔的重复性。
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