Spectral-resolved multifocal multiphoton microscopy with multianode photomultiplier tubes

Area of Science:

• Biomedical Optics
• Microscopy Technology
• Fluorescence Imaging

Background:

• Multiphoton excitation fluorescence microscopy is crucial for in vivo deep tissue imaging.
• High imaging speed and multicolor resolution are essential for biological applications.
• Multifocal multiphoton microscopy (MMM) enhances speed in turbid specimens using multi-anode photomultiplier tubes (MAPMT).

Purpose of the Study:

• To extend MAPMT-based MMM with spectral resolved imaging capabilities.
• To enable simultaneous detection of multiple emission signals.
• To optimize imaging for high-throughput and high-content applications.

Main Methods:

• Generating a linear array of excitation foci instead of a 2D grid.
• Utilizing one axis of the 2D MAPMT for spectral dispersion and detection.
• Implementing spectral-resolved MMM for parallelized excitation and detection.

Main Results:

• Demonstrated spectral resolved imaging capability in MAPMT-based MMM.
• Achieved simultaneous detection of multiple emission signals with high imaging speed.
• Successfully applied the technique to imaging data from kidney, peripheral nerve, and brain.

Conclusions:

• Spectral-resolved MMM provides a high-throughput, high-content imaging solution.
• The method enhances imaging speed without sacrificing signal-to-noise ratio.
• This technique is valuable for diverse biological applications requiring deep tissue imaging.