Resonant optical ultrasound transducer (ROUT) arrays for high resolution photoacoustic imaging

2006 ◽  
Author(s):  
M. O'Donnell ◽  
S. Ashkenazi ◽  
L. J. Guo ◽  
C. Y. Chao ◽  
W. Y. Fung ◽  
...  
Keyword(s):  
High Resolution ◽  
Photoacoustic Imaging ◽  
Ultrasound Transducer

scholarly journals Rapid High-Resolution Mosaic Acquisition for Photoacoustic Remote Sensing

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1027 ◽  
Author(s):  
Saad Abbasi ◽  
Kevan Bell ◽  
Parsin Haji Reza
Keyword(s):  
High Resolution ◽  
Photoacoustic Imaging ◽  
Image Resolution ◽  
Large Field ◽  
Reflection Mode ◽  
Step Size ◽  
Fiber Networks ◽  
Optical Scanning ◽  
Rapid Acquisition ◽  
Stage Scanning

Mechanical stages are routinely used to scan large expanses of biological specimens in photoacoustic imaging. This is primarily due to the limited field of view (FOV) provided by optical scanning. However, stage scanning becomes impractical at higher scanning speeds, or potentially unfeasible with heavier samples. Also, the slow scan-rate of the stages makes high resolution scanning a time-consuming process. Some clinical applications such as microsurgery require submicron resolution in a reflection-mode configuration necessitating a method that can acquire large field of views with a small raster scanning step size. In this study, we describe a method that combines mechanical stages with optical scanning for the rapid acquisition of high-resolution large FOVs. Optical scanning is used to acquire small frames in a two-dimensional grid formed by the mechanical stages. These frames are captured with specific overlap for effective image registration. Using a step size of 200 nm, we demonstrate mosaics of carbon fiber networks with FOVs of 0.8 × 0.8 mm2 captured in under 70 s with 1.2 µm image resolution. Larger mosaics yielding an imaging area of 3 × 3 mm2 are also shown. The method is validated by imaging a 1 × 1 mm2 section of unstained histopathological human tissue.

High resolution photoacoustic imaging of microvasculature in normal and cancerous bladders

2013 ◽  
Author(s):  
Zhixing Xie ◽  
William Roberts ◽  
Paul L. Carson ◽  
Xiaojun Liu ◽  
Chao Tao ◽  
...  
Keyword(s):  
High Resolution ◽  
Photoacoustic Imaging

scholarly journals Ring Ultrasound Transducer Based Miniaturized Photoacoustic Imaging System

2018 ◽  
Author(s):  
Ajay Dangi ◽  
Sumit Agrawal ◽  
Jedidiah Lieberknecht ◽  
Jason Zhang ◽  
Sri-Rajasekhar Kothapalli
Keyword(s):  
Imaging System ◽  
Photoacoustic Imaging ◽  
Ultrasound Transducer
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