Please use this identifier to cite or link to this item:
|Title:||Adaptive coherent photoacoustic sensing||Authors:||Gao, Fei
|Keywords:||DRNTU::Engineering::Electrical and electronic engineering
Signal To Noise Ratio
|Issue Date:||2018||Source:||Gao, F., Feng, X., Zhang, R., Liu, S., & Zheng, Y. (2018). Adaptive coherent photoacoustic sensing. Progress in Biomedical Optics and Imaging - Proceedings of SPIE, 10494, 104946G-. doi:10.1117/12.2292627||Series/Report no.:||Progress in Biomedical Optics and Imaging - Proceedings of SPIE||Abstract:||Sensitive detection is always crucial to photoacoustic sensing and imaging applications owing to the extremely low conversion efficiency from light to sound. Conventional approach to enhance the signal-to-noise ratio (SNR) of the photoacoustic signal is data averaging, which is quite time-consuming due to multiple data acquisitions for each photoacoustic measurement. Especially for high power pulsed laser source with only 10-20 pulse repetition rate, multiple data averaging will severely degrade the frame rate. In this paper, we present a simple but efficient way, called adaptive coherent photoacoustic (aCPA) sensing to obviously enhance the detected signal SNR with only single laser pulse. More specifically, The proposed aCPA employs an adaptive matched filter to cross-correlate with the raw time-domain PA signal iteratively. The optimum matched filter could be found after several iterations, leading to improved signal SNR. In vivo experimental results show that the proposed aCPA method improved the signal SNR by about 60 dB with single PA measurement. In conventional data averaging, 106 times PA measurements is required to achieve same SNR improvement. In other words, sensing and imaging speed is improved by 106 times in theory. It demonstrates the potential of aCPA to perform highly sensitive photoacoustic sensing and imaging with significantly accelerated speed.||URI:||https://hdl.handle.net/10356/88815
|DOI:||10.1117/12.2292627||Rights:||© 2018 Society of Photo-optical Instrumentation Engineers (SPIE). This paper was published in Progress in Biomedical Optics and Imaging - Proceedings of SPIE and is made available as an electronic reprint (preprint) with permission of Society of Photo-optical Instrumentation Engineers (SPIE). The published version is available at: [http://dx.doi.org/10.1117/12.2292627]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||EEE Journal Articles|
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.