Parallel acoustic delay lines for photoacoustic tomography.
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Achieving real-time photoacoustic (PA) tomography typically requires multi-element ultrasound transducer arrays and their associated multiple data acquisition (DAQ) electronics to receive PA waves simultaneously. We report the first demonstration of a photoacoustic tomography (PAT) system using optical fiber-based parallel acoustic delay lines (PADLs). By employing PADLs to introduce specific time delays, the PA signals (on the order of a few micro seconds) can be forced to arrive at the ultrasonic transducers at different times. As a result, time-delayed PA signals in multiple channels can be ultimately received and processed in a serial manner with a single-element transducer, followed by single-channel DAQ electronics. Our results show that an optically absorbing target in an optically scattering medium can be photoacoustically imaged using the newly developed PADL-based PAT system. Potentially, this approach could be adopted to significantly reduce the complexity and cost of ultrasonic array receiver systems.
author list (cited authors)
Yapici, M. K., Kim, C., Chang, C., Jeon, M., Guo, Z., Cai, X., Zou, J., & Wang, L. V.
complete list of authors
Yapici, Murat Kaya||Kim, Chulhong||Chang, Cheng-Chung||Jeon, Mansik||Guo, Zijian||Cai, Xin||Zou, Jun||Wang, Lihong V