Multi-Scale Label-free Human Brain Imaging with Integrated Serial Sectioning Polarization Sensitive Optical Coherence...

Area of Science:

• Neuroscience
• Biomedical Imaging
• Histology

Background:

• Studying neurodegenerative diseases requires detailed analysis of human brain cytoarchitecture, myelin, and vasculature.
• Standard histological processing causes tissue distortions, hindering accurate volumetric reconstruction.
• A multi-scale, volumetric imaging technique for intact brain structures is needed.

Approach:

• Integrated serial sectioning Polarization Sensitive Optical Coherence Tomography (PSOCT) and Two Photon Microscopy (2PM) were developed.
• This approach provides label-free, multi-contrast imaging (scattering, birefringence, autofluorescence).
• High-throughput reconstruction and image registration enabled comprehensive analysis of large tissue blocks.

Key Points:

• PSOCT and 2PM offer label-free, multi-contrast imaging of human brain tissue.
• The integrated method allows for high-throughput reconstruction of large sample blocks (4x4x2cm3).
• 2PM provides microscopic validation of PSOCT optical property maps, revealing capillary networks and cellular details.

Conclusions:

• This technique enables deformation-free volumetric reconstruction of human brain tissue.
• It is applicable to studying demyelination, cell loss, and microvascular changes in Alzheimer's disease and CTE.
• The method advances the study of neurodegenerative processes by providing comprehensive structural and cellular information.