Delay-multiply-and-sum based synthetic aperture focusing in photoacoustic microscopy
SCIE
SCOPUS
- Title
- Delay-multiply-and-sum based synthetic aperture focusing in photoacoustic microscopy
- Authors
- park jongin; jeon seungwan; Meng JIng; Song Liang; Lee, JS; kim chulhong
- Date Issued
- 2016-03
- Publisher
- SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
- 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 in vivo imaging experiments prove the validity of our proposed method. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29989
- DOI
- 10.1117/1.JBO.21.3.036010
- ISSN
- 1083-3668
- Article Type
- Article
- Citation
- JOURNAL OF BIOMEDICAL OPTICS, vol. 21, no. 3, 2016-03
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