Curved Flexible Resolution Test Chart for Fundus Imaging Assessment
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Solution Overview
Problem
Fundus imaging systems face challenges in accurately assessing and improving their imaging resolution, which is crucial for diagnosing and treating retinal conditions, due to manufacturing defects and optical aberrations that affect image quality.
Innovation Solution
An assessment assembly that includes a curved, flexible resolution test chart coupled to an artificial eye with scattering and depolarization properties similar to a human eye, allowing the fundus imaging system to capture images for evaluation of its resolution, and an analysis system to quantify the resolution at various field locations, facilitating computational correction of optical aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a flat resolution test chart is used, then it is easy to manufacture and apply, but it cannot accurately assess resolution across curved retinal regions
Solution Approach 1:
The resolution test chart is designed with a curved surface that matches the curvature of the retinal region being tested. This allows the chart to conform to the spherical geometry of the eye, enabling accurate resolution assessment across different field locations including peripheral regions, while maintaining manufacturability through flexible substrate materials.
2Measurement precision
If multiple test charts are used to cover different retinal regions, then comprehensive resolution assessment is achieved, but device complexity increases
Solution Approach 1:
Multiple resolution test charts with different orientations and features are integrated onto a single curved substrate that conforms to the retinal surface. This unified design allows comprehensive assessment of resolution across multiple field locations and orientations simultaneously, reducing the number of separate components needed while maintaining assessment completeness.
3Adaptability or versatility
If high elasticity material is used for the test chart, then it can conform to curved retinal surfaces, but manufacturing precision and dimensional stability decrease
Solution Approach 1:
The elasticity parameter of the test chart material is optimized to a specific range that provides sufficient flexibility to conform to curved retinal surfaces while maintaining adequate dimensional stability for precise resolution measurement. This balanced parameter selection allows the chart to adapt to the eye's curvature without excessive deformation that would compromise measurement accuracy.
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
This approach enables accurate evaluation and improvement of fundus imaging system resolution, leading to higher quality images and better diagnostic and treatment outcomes in ophthalmology by quantitatively assessing performance degradation and providing feedback for aberration correction.
Implementation Method 1
each of the resolution test charts can have an elasticity of less than 1.2 mega pascal
Implementation Method 2
the curved retina region has scattering and depolarization properties that are similar to the scattering and depolarization properties of the human eye
Implementation Method 3
the curved retina region has scattering and depolarization properties that are similar to the scattering and depolarization properties of the human eye
Data Source
AI summary
An assessment assembly (10) for assessing a fundus imaging system (12) includes at least one, curved, flexible resolution test chart (40). Each of the resolution test charts (40) can include a chart body (342), and a plurality of spaced apart chart features (344). Moreover, each of the resolution test charts (40) can be fixedly coupled to an artificial retina region (36) of an artificial eye (14). The artificial retina region (36) can be shaped and sized similar to a retina region (19E) of a human eye (19), and the artificial retina region (36) can have scattering and depolarization properties that are similar to the scattering and depolarization properties of the retina region (19E) of the human eye (19). The fundus imaging system (12) can capture one or more images (20) of the resolution test charts (40) that are evaluated to determine a resolution of the fundus imaging system (12).