Panoramic Optical Probe for Deep Brain Imaging
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Solution Overview
Problem
Current neurophotonics techniques are limited by spatial and temporal light scattering, restricting cellular resolution optical access to approximately 1 mm in mammalian brain tissue, leaving large portions of the brain inaccessible for imaging.
Innovation Solution
An optical tissue imaging system featuring a transparent cylindrical capillary with a rotatable and translatable probe, utilizing a mirror for panoramic access and refractive index matching with air instead of fluid to enhance imaging depth and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If traditional miniature optical components are inserted into brain tissue, then imaging depth is improved, but the viewable region is limited to the tip of the inserted device leaving most accessed tissue unviewable
Solution Approach 1:
The patent transitions from a single-point viewing geometry to a panoramic viewing geometry by introducing a mirror that reflects light from all directions around the probe to a single detection point. This dimensional transformation allows the viewable region to expand from a narrow tunnel view to a 360-degree spherical field of view, effectively increasing the viewable area by two to three orders of magnitude while maintaining deep tissue access
2Measurement precision
If fluid is used for refractive index matching between capillary and tissue, then imaging quality is improved, but mechanical coupling causes slower imaging speed and potential tissue damage
Solution Approach 1:
The patent removes the fluid medium from the capillary, replacing it with air. This extraction eliminates the mechanical coupling between the capillary and tissue that fluid provides, thereby removing the source of mechanical disturbances and vibration. The refractive index matching is achieved through optical design rather than fluid coupling, maintaining imaging quality while dramatically improving imaging speed and reducing tissue damage risk
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a two to three orders of magnitude increase in tissue access volume, enabling 360-degree panoramic views around the inserted probe, allowing for deeper and more extensive imaging of brain tissue while minimizing mechanical disturbances and improving imaging speed.
Implementation Method 1
The probe may include a mirror configured to reflect light to the tissue adjacent to a cylindrical wall of the cylindrical capillary
Implementation Method 2
refractive index matching with air instead of fluid to enhance imaging depth and speed
Data Source
AI summary
An optical tissue imaging system includes a probe for insertion into a transparent cylindrical capillary. The capillary includes an internal cylindrical channel that extends along a central axis. The capillary is inserted into tissue of a subject, and the probe may rotate and translate within the capillary. The probe may include a mirror configured to reflect light to the tissue outside of the cylindrical capillary.