Multifocal Macroscope Imaging Neural Activity
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Solution Overview
Problem
Current methods for studying distributed neural processes, such as those in the mammalian cerebral cortex, are limited by the inability to simultaneously measure fast neuronal activity dynamics at cellular resolution across three-dimensional centimeter-scale fields of view, with existing techniques offering either low temporal rates or low spatial resolution.
Innovation Solution
A macroscope configured for synchronous multifocal optical imaging using a multifocal widefield optics system with a dual-focus array of lenses, capable of focusing on multiple planes, allowing for high-speed imaging of neuronal activity across large fields of view with near-cellular resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large field of view two-photon microscopes are used for simultaneous recording from cortical areas at single-cell resolution, then spatial resolution is improved, but acquisition speed deteriorates (low temporal rates)
Solution Approach 1:
The imaging system is segmented into multiple focal planes using a dual-focus lenslet array, allowing simultaneous imaging of multiple cortical depths. This segmentation enables the system to capture neural activity across different layers concurrently, improving temporal resolution without sacrificing spatial detail at any single plane.
Solution Approach 2:
The system transitions from single-plane imaging to multi-plane volumetric imaging by adding the depth dimension through focal plane multiplication. The dual-focus lenslet array creates distinct focal sheets at different depths, enabling three-dimensional neural activity recording that captures both spatial and temporal dynamics simultaneously.
2Area of stationary object
If widefield imaging is used to reveal cortex-wide task involvement and activity patterns, then field of view is improved, but spatial resolution deteriorates (low spatial resolution)
Solution Approach 1:
The widefield view is segmented into multiple focal planes, with each plane providing high-resolution imaging of a specific cortical depth. The lenslet array divides the incoming light into multiple focal regions, allowing the system to maintain large field of view while achieving cellular resolution at each depth plane simultaneously.
Solution Approach 2:
The system merges multiple high-resolution images from different focal planes into a comprehensive volumetric representation of cortical activity. By combining the spatial information from each plane, the system achieves both wide field of view coverage and high spatial resolution throughout the cortical volume.
3Device complexity
If conventional single-focus imaging is used, then device complexity is low, but the ability to capture three-dimensional neural activity simultaneously deteriorates
Solution Approach 1:
The dual-focus lenslet array is a passive optical element that automatically creates multiple focal planes without requiring active control mechanisms. The system self-organizes the light paths through the lenslet array to produce simultaneous multi-plane imaging, eliminating the need for complex mechanical scanning or electronic control systems.
Solution Approach 2:
The system replaces complex mechanical scanning systems with a static lenslet array that optically divides the field into multiple focal planes. This substitution eliminates moving parts and complex control electronics while achieving multi-plane imaging capability through pure optical means.
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
Enables simultaneous recording of neural activity across the entire dorsal cortex at high speeds, revealing localized and distributed population encoding of motor actions and history-guided motor plans, with improved signal-to-noise ratio and spatial resolution compared to conventional methods.
Implementation Method 1
a multifocal widefield optics comprising a plurality of optical components configured to focus on a plurality of planes
Data Source
AI summary
Provided herein is a macroscope comprising an objective apparatus comprising a multifocal widefield optics comprising a plurality of optical components configured to focus on a plurality of planes. Also provided herein are methods for analyzing a three-dimensional specimen, the method comprising obtaining, via a macroscope, synchronous multifocal optical images of a plurality of planes of the three-dimensional specimen, wherein the macroscope comprises an objective apparatus comprising a multifocal widefield optics comprising a plurality of optical components configured to focus on a plurality of planes. The three-dimensional specimen can be a biological specimen, such as brain.