Quantified elasticity mapping of retinal layers using synchronized acoustic radiation force optical coherence
Yueqiao Qu1,2, Youmin He1,2, Yi Zhang3
1Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Road East, Irvine, CA 92612, USA.
Biomedical Optics Express
|January 8, 2019
Summary
Acoustic radiation force optical coherence elastography (ARF-OCE) non-invasively measures retinal elasticity. This technique shows potential for understanding retinal diseases like age-related macular degeneration (AMD) by mapping tissue stiffness.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Medical Imaging
Background:
- Age-related macular degeneration (AMD) is a primary cause of vision loss in older adults.
- Early AMD detection is challenging due to subtle structural changes.
- Altered retinal mechanical properties are hypothesized in AMD onset.
Purpose of the Study:
- To introduce a novel, non-invasive method for assessing retinal elasticity.
- To measure and estimate the elasticity of porcine retina using ARF-OCE.
- To correlate elasticity measurements with histological findings.
Main Methods:
- Utilized synchronized acoustic radiation force optical coherence elastography (ARF-OCE).
- Applied acoustic force to cadaver porcine retina to induce vibrations.
- Employed high-resolution optical methods to detect nanometer-scale tissue displacements.
- Segmented retinal layers and estimated Young's modulus.
- Validated results with Hematoxylin and Eosin (H&E) staining.
Main Results:
- Successfully mapped retinal elasticity using ARF-OCE.
- Elasticity ranged from 1.3 kPa (ganglion side) to 25.9 kPa (photoreceptor side).
- Results showed good correlation with histological data.
Conclusions:
- ARF-OCE enables elasticity mapping of individual retinal layers.
- This technique offers potential for improved understanding of retinal diseases like AMD.
- Further evaluation is needed for clinical application.
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