Photoacoustic imaging with a commercial ultrasound system and a custom probe.
Photoacoustic imaging with a commercial ultrasound system and a custom probe.
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DOI：
10.1016/j.ultrasmedbio.2010.12.005
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发表时间：
2011-03
影响因子：
2.9
通讯作者：
Carson, Paul L.
中科院分区：
文献类型：
--
作者：
Wang, Xueding;Fowlkes, J. Brian;Cannata, Jonathan M.;Hu, Changhong;Carson, Paul L.
通过使用独立的超声（US）单元构建光声成像（派）系统使得可以方便地利用最先进的超声技术。然而，有时有限的接收灵敏度和商业US探头的相对窄的带宽可能不足以获取高质量的光声图像。在这项工作中，一个高速派系统已开发使用商业美国单位和定制的128元件压电聚合物阵列（PPA）探头使用P（VDF-TrFE）膜和柔性电路来定义的元素。由于US单元支持从64个并行接收通道同时采集信号，因此可以分别在单激光器发射或双激光器发射之后从64或128元件阵列孔径采集用于合成图像形成的派数据。因此，2D B扫描成像可以以高达10 Hz的最大帧速率实现，仅受激光重复率的限制。P（VDF-TrFE）的独特性质使得该阵列的-6dB接收带宽超过120%。一个专门设计的128通道的光声板将阵列和系统电缆连接起来，这不仅可以实现元件电阻抗匹配，而且还可以进一步提高信噪比（SNR），以进一步增强对微弱光声信号的检测。通过对体模和兔耳的实验，证明了该派系统的良好性能。
Building photoacoustic imaging (PAI) systems by using stand-alone ultrasound (US) units makes it convenient to take advantage of the state-of-the-art ultrasonic technologies. However, the sometimes limited receiving sensitivity and the comparatively narrow bandwidth of commercial US probes may not be sufficient to acquire high quality photoacoustic images. In this work, a high-speed PAI system has been developed using a commercial US unit and a custom built 128-element piezoelectric-polymer array (PPA) probe using a P(VDF-TrFE) film and flexible circuit to define the elements. Since the US unit supports simultaneous signal acquisition from 64 parallel receive channels, PAI data for synthetic image formation from a 64 or 128 element array aperture can be acquired after a single or dual laser firing, respectively. Therefore, 2D B-scan imaging can be achieved with a maximum frame rate up to 10 Hz, limited only by the laser repetition rate. The uniquely properties of P(VDF-TrFE) facilitated a wide -6 dB receiving bandwidth of over 120 % for the array. A specially designed 128-channel preamplifier board made the connection between the array and the system cable which not only enabled element electrical impedance matching but also further elevated the signal-to-noise ratio (SNR) to further enhance the detection of weak photoacoustic signals. Through the experiments on phantoms and rabbit ears, the good performance of this PAI system was demonstrated.
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影响因子：
3.5
作者：
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