An Ultrasound Catheter Using Laser-Induced Breakdown
An Ultrasound Catheter Using Laser-Induced Breakdown
复制标题
利用激光诱导击穿的超声导管
DOI：
10.1143/jjap.42.3233
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发表时间：
2003
影响因子：
1.5
通讯作者：
S. Kawata
中科院分区：
文献类型：
--
作者：
O. Oshiro;K. Kato;Y. Yasumuro;T. Sugiura;K. Chihara;S. Kawata
本文描述了利用激光诱导击穿(LIB)的超声导管的基础研究。激光能量通过光纤和透镜传输，并在水浴中聚焦产生LiB。为了减少产生LiB的激光能量，用重水(D2O)代替H2O填充水浴。在实验中，LiB产生的超声信号是用针状水听器检测的。经过放大和数字化后，信号被传输到个人计算机(PC)，然后离线滤波。滤波后的信号显示超声信号有多个峰值。第一个峰值是用水听器直接探测到的信号，其余的峰值是在水边或浴壁反射的信号，表明超声波的方向性较低。我们的结论是，所提出的导管是可行的，以获得血管的正面图像。
This paper describes fundamental investigations for an ultrasound catheter using laser-induced breakdown (LIB). Laser energy was transmitted through an optical fiber and lenses and focused to generate LIB in a water bath. In order to reduce laser energy for LIB generation, heavy water (D2O) was used to fill in the water bath instead of H2O. In the experiments, the ultrasound signal generated from LIB was detected with a needle hydrophone. After amplification and digitization, the signal was transferred to a personal computer (PC) and then off-line filtered. The filtered signal shows that the ultrasound signals have several peaks. The first peak is the signal directly detected with the hydrophone, while the rest of the peaks are those reflected at the water front or bath walls, indicating that the ultrasound has low directivity. We concluded that the proposed catheter is feasible for obtaining the frontal image of a blood vessel.