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Confocal multispot microscope for fast and deep imaging in semicleared tissues.

Marie-Pierre Adam1, Marie Caroline Müllenbroich1,2, Antonino Paolo Di Giovanna1

  • 1University of Florence, European Laboratory for Non-linear Spectroscopy, Florence, Italy.

Journal of Biomedical Optics
|February 21, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a novel microscope for fast, deep imaging of semi-cleared mouse brains. It combines multispot two-photon excitation and rolling shutter detection, enabling detailed visualization of neural structures like dendritic spines.

Keywords:
confocal line detectiondeep tissue imagingmultispot microscopytwo-photon microscopy

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Area of Science:

  • Neuroscience
  • Microscopy
  • Biophotonics

Background:

  • Light-sheet microscopy excels with transparent samples, while two-photon microscopy handles scattering but is slower.
  • Traditional tissue clearing methods for scattering samples are complex and time-consuming.
  • Simpler clearing methods can achieve sufficient transparency for many applications.

Purpose of the Study:

  • To develop a microscope optimized for imaging semi-cleared tissue, balancing speed and depth.
  • To enable fast and deep imaging within semi-cleared mouse brains.

Main Methods:

  • Developed a novel microscope combining multispot two-photon excitation with rolling shutter wide-field detection.
  • Theoretially and experimentally evaluated the point spread function and contrast based on shutter size.
  • Utilized semi-clearing techniques for enhanced tissue transparency.

Main Results:

  • Demonstrated the ability to image deep within semi-cleared mouse brains.
  • Achieved fast image acquisition in semi-cleared tissue.
  • Successfully imaged dendritic spines up to 400-μm deep in fixed brain slices.

Conclusions:

  • The developed microscope effectively images semi-cleared tissue, offering a faster alternative to traditional methods for deep brain imaging.
  • This approach provides a practical solution for visualizing neural structures in scattering samples without extensive clearing.