Title
High-Speed High-Resolution Laser Diode-Based Photoacoustic Microscopy For In Vivo Microvasculature Imaging
Abstract
Laser diodes (LDs) have been considered as cost-effective and compact excitation sources to overcome the requirement of costly and bulky pulsed laser sources that are commonly used in photoacoustic microscopy (PAM). However, the spatial resolution and/or imaging speed of previously reported LD-based PAM systems have not been optimized simultaneously. In this paper, we developed a high-speed and high-resolution LD-based PAM system using a continuous wave LD, operating at a pulsed mode, with a repetition rate of 30 kHz, as an excitation source. A hybrid scanning mechanism that synchronizes a one-dimensional galvanometer mirror and a two-dimensional motorized stage is applied to achieve a fast imaging capability without signal averaging due to the high signal-to-noise ratio. By optimizing the optical system, a high lateral resolution of 4.8 mu m has been achieved. In vivo microvasculature imaging of a mouse ear has been demonstrated to show the high performance of our LD-based PAM system.
Year
DOI
Venue
2021
10.1186/s42492-020-00067-5
VISUAL COMPUTING FOR INDUSTRY BIOMEDICINE AND ART
Keywords
DocType
Volume
Photoacoustic microscopy, Laser diode, In vivo imaging, Microvasculature imaging
Journal
4
Issue
ISSN
Citations 
1
2524-4442
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Xiufeng Li110.72
Victor T C Tsang200.34
Kang Lei3216.66
Y Zhang4317.34
Terence T W Wong500.34