Multicolor multiscale brain imaging with chromatic multiphoton serial microscopy.

Area of Science:

• Neuroscience
• Microscopy
• Biomedical Imaging

Background:

• Current large-scale brain imaging lacks efficient multicolor contrast.
• Advanced microscopy is crucial for understanding complex neural circuits.

Purpose of the Study:

• Introduce Chromatic Multiphoton Serial (ChroMS) microscopy.
• Enable efficient, large-scale multicolor imaging of neural tissue.

Main Methods:

• ChroMS integrates one-shot multicolor multiphoton excitation via wavelength mixing.
• Serial block-face image acquisition for volumetric data.
• Utilizes spectrally distinct fluorescent proteins and label-free nonlinear signals.

Main Results:

• Achieved organ-scale, micrometric resolution imaging over several cubic millimeters.
• Demonstrated constant resolution and sub-micron channel registration.
• Enabled 3D analysis of astrocyte morphology, neuron tracing, and whole-brain axonal mapping.

Conclusions:

• ChroMS microscopy provides a powerful tool for multiscale and system-level neuroscience research.
• Facilitates detailed analysis of neural structures and connectivity at unprecedented scales.
• Advances the capabilities of multicolor contrast in large-volume brain imaging.