Anatomical atlas-guided diffuse optical tomography of brain activation

Area of Science:

• Neuroimaging
• Biomedical Engineering
• Optical Physics

Background:

• Diffuse optical tomography (DOT) is a powerful tool for non-invasively imaging human brain activation.
• Accurate anatomical localization of DOT results often requires subject-specific magnetic resonance imaging (MRI).
• This reliance on MRI increases cost and complexity, limiting widespread clinical adoption.

Purpose of the Study:

• To present and validate a novel neuroimaging protocol for diffuse optical tomography (DOT) of human brain activation.
• To demonstrate the feasibility of using a standardized anatomical head atlas to guide DOT image reconstruction.
• To assess if atlas-guided DOT can eliminate the need for subject-specific MRI.

Main Methods:

• A neuroimaging protocol was developed using a standardized anatomical atlas of the human head.
• The protocol was applied to image the hemodynamic response to median-nerve stimulation in three healthy subjects.
• DOT images generated using the atlas were compared with those reconstructed using subject-specific head anatomy derived from MRI.

Main Results:

• The atlas-guided DOT protocol successfully reconstructed brain activation locations.
• Activation was localized to the expected gyrus, consistent with results from subject-specific MRI.
• The findings demonstrate the potential of atlas-based anatomy for accurate DOT image interpretation.

Conclusions:

• A novel, atlas-guided diffuse optical tomography protocol can accurately map human brain activation.
• This method obviates the need for subject-specific MRI, simplifying and potentially reducing the cost of neuroimaging.
• The protocol offers a promising alternative for anatomical interpretation in DOT studies of brain function.