Multi-functional Adaptive Optics Retinal Imaging System
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Solution Overview
Problem
Current retinal imaging technologies face limitations in achieving high-resolution, multi-functional imaging capabilities that combine adaptive optics with Fourier domain optical coherence tomography and scanning laser ophthalmoscopy, particularly in providing comprehensive visualization of retinal structures and diseases such as diabetic retinopathy and macular degeneration.
Innovation Solution
A multi-functional retinal imaging system that integrates adaptive optics-corrected Fourier domain optical coherence tomography and scanning laser ophthalmoscopy channels, enabling simultaneous high-lateral resolution and micron-level axial resolution imaging, along with retinal tracking and wide-field line scanning ophthalmoscopy, using a combination of spectrometer-based and swept source-based implementations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If adaptive optics are integrated with Fourier domain OCT and scanning laser ophthalmoscopy, then imaging resolution and functionality are improved, but device complexity increases
Solution Approach 1:
The patent combines adaptive optics, Fourier domain optical coherence tomography, and scanning laser ophthalmoscopy into a single integrated imaging system. The adaptive optics correct for ocular aberrations while the FD-OCT provides axial resolution and the SLO provides en-face imaging, merging multiple imaging modalities to achieve comprehensive retinal visualization without requiring separate devices
Solution Approach 2:
The imaging system is designed to perform multiple functions simultaneously: it can image retinal layers in cross-section via FD-OCT, provide en-face imaging via SLO, correct optical aberrations via adaptive optics, and track retinal motion. This multi-functional design eliminates the need for multiple separate devices and provides comprehensive diagnostic capabilities
2Adaptability or versatility
If multiple imaging channels are combined in a single system, then versatility is improved, but device complexity increases
Solution Approach 1:
The system integrates multiple imaging channels including adaptive optics-corrected FD-OCT, scanning laser ophthalmoscopy, and line scanning ophthalmoscopy into a single platform. This allows the system to provide cross-sectional imaging, en-face imaging, and wide-field visualization depending on the clinical requirement, making it universally applicable to various retinal pathologies
Solution Approach 2:
The imaging system is divided into separate functional modules: an adaptive optics module for aberration correction, an FD-OCT module for cross-sectional imaging, and an SLO module for en-face imaging. This segmentation allows each module to be optimized independently while working together to provide comprehensive imaging capabilities
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 enhanced visualization of retinal layers, photoreceptors, and vasculature, enabling early detection and diagnosis of retinal diseases with improved axial resolution and penetration depth, facilitating drug development and vision studies.
Implementation Method 1
AO is a technique to enhance the transverse resolution and depth sectioning capabilities by detection and correction of ocular aberrations
Implementation Method 2
OCT uses low-coherence interferometry to de-link axial resolution from the diffraction-limited depth-of-field for generation of micron-level axial resolution optical depth sections
Implementation Method 3
SLO is a confocal technique whose fast 2-D frame axis is en-face (i.e. lateral-lateral) with sensitivity to multiply-scattered light
Implementation Method 4
FDOCT has now supplanted time domain (TD) OCT because of its advantages of higher speeds (near video rate), higher signal-to-noise ratio via simultaneous multiplexed acquisition of depth voxels
Data Source
AI summary
An optical apparatus includes a system of optical components capable of operating in a scanning laser ophthalmoscope (SLO) mode and an optical coherence tomography (OCT) mode. The system of optical components includes a first optical module for the SLO mode, a second optical module for the OCT mode, and a first scanning device. The first optical module for the SLO mode includes a first source adapted to provide a first imaging beam for the SLO mode and a first detection device configured to receive a first signal associated with a first image of a retina of an eye. The second optical module for the OCT mode includes a second source adapted to provide a second imaging beam for the OCT mode and a second detection device configured to receive a second signal associated with a second image of the retina. The first scanning device is configured to move the first imaging beam along the retina in the slow axis of the SLO mode to acquire the first image and (ii) to move the second imaging beam along the retina in the fast axis of the OCT mode to acquire the second image.