Imaging the structural connectome with hybrid MRI-microscopy tractography

Area of Science:

• Neuroscience
• Biophysics
• Medical Imaging

Background:

• Mapping whole-brain neural connectivity is difficult, especially in large brains lacking 3D microscopy.
• Existing multi-modal approaches struggle to integrate MRI and microscopy data effectively.

Purpose of the Study:

• To introduce a unified data-fusion method for hybrid MRI-microscopy fibre orientation and connectome reconstruction.
• To overcome limitations in current neuroanatomical investigation techniques.

Main Methods:

• Developed a data-fusion technique combining 2D microscopy's in-plane orientations with MRI's through-plane information.
• Constructed 3D hybrid fibre orientations, preserving microscopy's myelin specificity.

Main Results:

• Achieved superior fibre tracking at resolutions exceeding MRI capabilities.
• Enabled detailed connectome reconstruction by integrating multi-modal datasets.

Conclusions:

• The developed method facilitates advanced neuroanatomical investigation in both animal and human brains.
• The approach is species-agnostic, compatible with standard 2D microscopy, and openly available.