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Related Experiment Video

Updated: Dec 2, 2025

Multiphoton Intravital Imaging for Monitoring Leukocyte Recruitment during Arteriogenesis in a Murine Hindlimb Model

Multiphoton Intravital Imaging for Monitoring Leukocyte Recruitment during Arteriogenesis in a Murine Hindlimb Model

Published on: September 30, 2021

Fast in vivo multiphoton light-sheet microscopy with optimal pulse frequency.

Vincent Maioli¹, Antoine Boniface¹, Pierre Mahou¹

¹Laboratory for Optics and Biosciences, Ecole Polytechnique, CNRS, INSERM, Institut Polytechnique de Paris, 91128 Palaiseau, France.

Biomedical Optics Express

|November 5, 2020

Summary

Zebrafish embryo heartbeats reveal how to minimize light damage in fast multiphoton microscopy. Optimizing laser settings significantly enhances imaging signal and speed for live tissue studies.

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Area of Science:

Biomedical optics
Microscopy
Developmental biology

Background:

Improving imaging speed in multiphoton microscopy is crucial for live biological studies.
Light-sheet illumination offers advantages for fast *in vivo* imaging.
Photoperturbation effects in multiphoton light-sheet microscopy require further investigation.

Purpose of the Study:

To investigate and quantify photoperturbation in multiphoton light-sheet microscopy.
To establish guidelines for balancing signal enhancement and photoperturbation.
To optimize laser parameters for faster and clearer live tissue imaging.

Main Methods:

Utilizing zebrafish embryo heart rate as a sensitive indicator of photoperturbation.
Analyzing heart rate variations in response to laser power, pulse frequency, and wavelength.
Optimizing laser pulse frequency to maximize signal-to-noise ratio and minimize phototoxicity.

Main Results:

Zebrafish embryo heart rate effectively probes linear and nonlinear photoperturbations.
Guidelines derived for optimizing laser parameters to balance signal and photoperturbation.
Achieved a one-order-of-magnitude signal enhancement by optimizing laser pulse frequency.

Conclusions:

Multiphoton light-sheet microscopy can achieve significantly faster live tissue imaging.
Understanding and mitigating photoperturbation is key to high-speed microscopy.
This work provides a framework for optimizing imaging parameters in sensitive biological samples.