Non-contact photoacoustic imaging using a fiber based interferometer with optical amplification
Non-contact photoacoustic imaging using a fiber based interferometer with optical amplification
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DOI：
10.1364/boe.4.002322
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发表时间：
2013-11-01
影响因子：
3.4
通讯作者：
Berer, Thomas
中科院分区：
文献类型：
--
作者：
Hochreiner, Armin;Bauer-Marschallinger, Johannes;Berer, Thomas
在光声成像中，超声信号通常是通过接触换能器来检测的。对于某些应用，应避免与组织接触。作为接触换能器的替代方案，可以使用干涉测量手段来远程获取光声信号。本文报道了基于光纤的马赫-曾德尔干涉仪的非接触式三维和二维光声成像。检测光束通过光纤网络传输到样品的表面上。后向反射光被收集并耦合到同一光纤中。为了获得高信噪比，在解调前，通过掺铒光纤放大器对反射光进行光放大。数据采集后，利用傅立叶域重建算法重建初始压力分布。我们提出了组织模拟体模和鸡皮上的远程光声成像。(C)2013年美国光学学会
In photoacoustic imaging the ultrasonic signals are usually detected by contacting transducers. For some applications contact with the tissue should be avoided. As alternatives to contacting transducers interferometric means can be used to acquire photoacoustic signals remotely. In this paper we report on non-contact three and two dimensional photoacoustic imaging using an optical fiber-based Mach-Zehnder interferometer. A detection beam is transmitted through an optical fiber network onto the surface of the specimen. Back reflected light is collected and coupled into the same optical fiber. To achieve a high signal/noise ratio the reflected light is amplified by means of optical amplification with an erbium doped fiber amplifier before demodulation. After data acquisition the initial pressure distribution is reconstructed by a Fourier domain reconstruction algorithm. We present remote photoacoustic imaging of a tissue mimicking phantom and on chicken skin. (C) 2013 Optical Society of America