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  • 标题:High-speed high-resolution laser diodebased photoacoustic microscopy for in vivo microvasculature imaging
  • 本地全文:下载
  • 作者:Xiufeng Li ; Victor T C Tsang ; Lei Kang
  • 期刊名称:Visual Computing for Industry, Biomedicine, and Art
  • 电子版ISSN:2524-4442
  • 出版年度:2021
  • 卷号:4
  • 页码:1-6
  • DOI:10.1186/s42492-020-00067-5
  • 语种:English
  • 出版社:SpringerOpen
  • 摘要: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-tonoise ratio. By optimizing the optical system, a high lateral resolution of 4.8 μm 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.
  • 关键词:Photoacoustic microscopy;Laser diode;In vivo imaging;Microvasculature imaging
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