28 March 2016 Delay-multiply-and-sum-based synthetic aperture focusing in photoacoustic microscopy
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Abstract
We propose an improved version of a synthetic aperture focusing technique (SAFT) based on a delay-multiply-and-sum algorithm for acoustic-resolution photoacoustic microscopy (AR-PAM). In this method, the photoacoustic (PA) signals from multiple scan-lines are combinatorially coupled, multiplied, and then summed. This process can be considered a correlation operation of the PA signals in each scan-line, so the spatial coherent information between the PA signals can be efficiently extracted. By applying this method in conventional AR-PAM, lateral resolution and signal-to-noise ratio in out-of-focus regions are much improved compared with those estimated from the previously developed SAFT, respectively, thereby achieving the extension of the imaging focal region. Our phantom and
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Jongin Park, Seungwan Jeon, Jing Meng, Liang Song, Jin S. Lee, Chulhong Kim, "Delay-multiply-and-sum-based synthetic aperture focusing in photoacoustic microscopy," Journal of Biomedical Optics 21(3), 036010 (28 March 2016). https://doi.org/10.1117/1.JBO.21.3.036010 . Submission:
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