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Three-dimensional Optical-resolution Photoacoustic Microscopy

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

Acoustic-feedback wavefront-adapted photoacoustic microscopy.

Yuecheng Shen¹, Jun Ma², Chengtian Hou²

¹State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.

|February 14, 2025

Summary

Acoustic-feedback wavefront-adapted photoacoustic microscopy (AWA-PAM) overcomes depth-related image degradation in tissues. This novel technique enhances label-free imaging of fine biological structures in vivo.

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Area of Science:

Biomedical Optics
Microscopy Techniques
In Vivo Imaging

Background:

Optical microscopy is crucial for biomedical research and clinical applications.
Optical-resolution photoacoustic microscopy (PAM) enables label-free molecular imaging but suffers from degraded quality at depth due to tissue optical aberrations.
Existing adaptive optics methods often rely on optical signals, which can be challenging in scattering tissues.

Purpose of the Study:

To develop and demonstrate a novel imaging method, acoustic-feedback wavefront-adapted PAM (AWA-PAM), for dynamic compensation of tissue-induced optical aberrations at depth.
To improve the imaging quality and resolution of PAM in biological tissues.
To enable label-free visualization of fine structures in vivo.

Main Methods:

Development of AWA-PAM, which utilizes acoustic signals to guide wavefront correction, unlike traditional optical-feedback methods.
Implementation of adaptive optics principles guided by acoustic feedback for aberration compensation.
In vivo imaging experiments on zebrafish embryos and mouse ears.

Main Results:

AWA-PAM effectively compensates for tissue-induced optical aberrations, significantly improving imaging depth.
The method enhances both signal strength and lateral resolution compared to conventional PAM.
Fine structures like spinal cords and microvessels in live samples were visualized with unprecedented clarity.

Conclusions:

AWA-PAM offers a robust solution for deep-tissue optical imaging by overcoming aberration limitations.
This technique advances label-free imaging capabilities for in vivo biological research.
AWA-PAM is poised to become a valuable tool for the in vivo imaging community.