A charge amplification approach for photoacoustic tomography (PAT) with parallel acoustic delay line (PADL) arrays
A charge amplification approach for photoacoustic tomography (PAT) with parallel acoustic delay line (PADL) arrays
复制标题
具有并行声延迟线 (PADL) 阵列的光声断层扫描 (PAT) 电荷放大方法
DOI：
10.1117/12.2250433
复制
发表时间：
2017
影响因子：
2.4
通讯作者：
J. Zou
中科院分区：
文献类型：
--
作者：
Cheng Fang;A. Ustun;Young Cho;J. Zou
报道了一种新的基于平行声延迟线阵列的光声层析成像(PAT)电荷放大方法。通过使用PADL阵列来产生不同的时间延迟，可以利用单元件换能器和随后用于图像重建的单通道DAQ电子器件同时接收多通道PA信号。与传统电压放大器的输出电压随换能器电容的增大而下降不同，理论分析和实验结果都表明，电荷放大可以提供几乎恒定的换能器-放大器增益，而不受换能器电容的影响。因此，它允许使用大型单元件换能器与多个PADL接口，而不会牺牲每个通道的SNR。这为使用大型PADL阵列实现宽视场和高横向分辨率的PAT提供了可能性。
This paper reports the development of a new charge amplification approach for photoacoustic tomography (PAT) based on parallel acoustic delay line (PADL) arrays. By using a PADL array to create different time delays, multiple-channel PA signals can be received simultaneously with a single-element transducer followed by single-channel DAQ electronics for image reconstruction. Unlike the conventional voltage amplifiers whose output voltage drops with increasing transducer capacitance, both theoretical analysis and experimental results have shown that the charge amplification can provide almost constant transducer-amplifier gain, which is not affected by the transducer capacitance. Therefore, it allows the use of a large single-element transducer to interface many PADLs without sacrificing the SNR of each channel. This opens the possibility of using large PADL arrays to achieve PAT with a wide field of view and high lateral resolution.