Forward-viewing resonant fiber-optic scanning endoscope of appropriate scanning speed for 3D OCT imaging.
Forward-viewing resonant fiber-optic scanning endoscope of appropriate scanning speed for 3D OCT imaging.
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DOI：
10.1364/oe.18.014375
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发表时间：
2010-07-05
期刊：
影响因子：
3.8
通讯作者：
Li X
中科院分区：
文献类型：
--
作者：
Huo L;Xi J;Wu Y;Li X
为实现实时三维内窥镜OCT成像，研制了一种适用于高速傅里叶域光学相干断层扫描（FD-OCT）系统的前视共振光纤内窥镜。通过合理选择光纤悬臂梁长度，部分改变悬臂梁的力学性能，并在悬臂梁顶端增加配重，探索了一种方便调谐谐振式光纤扫描器扫描频率的新方法。系统的分析表明，谐振扫描频率可以调谐超过两个数量级的跨度从~ 10 Hz到~kHz。这种灵活的扫描频率范围使得可以设置内窥镜的适当扫描速度以匹配各种FD-OCT系统的不同A扫描速率。开发了适合与40 kHz扫频源OCT（SS-OCT）系统配合使用的直径为2.4 mm、频率为62.5 Hz的扫描内窥镜，并证明其可用于生物组织的3D OCT成像。
A forward-viewing resonant fiber-optic endoscope of a scanning speed appropriate for a high-speed Fourier-domain optical coherence tomography (FD-OCT) system was developed to enable real-time, three-dimensional endoscopic OCT imaging. A new method was explored to conveniently tune the scanning frequency of a resonant fiber-optic scanner, by properly selecting the fiber-optic cantilever length, partially changing the mechanical property of the cantilever, and adding a weight to the cantilever tip. Systematic analyses indicated the resonant scanning frequency can be tuned over two orders of magnitude spanning from ~10Hz to ~kHz. Such a flexible scanning frequency range makes it possible to set an appropriate scanning speed of the endoscope to match the different A-scan rates of a variety of FD-OCT systems. A 2.4-mm diameter, 62.5-Hz scanning endoscope appropriate to work with a 40-kHz swept-source OCT (SS-OCT) system was developed and demonstrated for 3D OCT imaging of biological tissues.