Visualization of micro-capillaries using optical coherence tomography angiography with and without adaptive optics
Matthias Salas1, Marco Augustin1, Laurin Ginner2
1Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Waehringer Guertel 18-20 A-1090 Vienna, Austria.
Biomedical Optics Express
|January 20, 2017
Summary
Adaptive optics (AO) enhances optical coherence tomography angiography (OCTA) for clearer retinal imaging. This technology improves visualization of small vessels and reduces artifacts, aiding diagnosis of retinal vascular diseases.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Medical Imaging
Background:
- Optical coherence tomography angiography (OCTA) visualizes retinal vasculature, including capillaries below system resolution.
- Limitations include shadowing and projection artifacts, potentially misleading vascular structure analysis.
Purpose of the Study:
- To investigate the benefits of adaptive optics (AO) technology for optical coherence tomography angiography (OCTA).
- To compare the performance of AO-OCT, AO-OCTA, and OCTA in imaging retinal vasculature.
Main Methods:
- Utilized adaptive optics-optical coherence tomography angiography (AO-OCTA) and optical coherence tomography angiography (OCTA).
- Compared imaging of retinal vasculature in healthy volunteers and diabetic patients.
Main Results:
- AO-OCT and AO-OCTA significantly reduce shadowing artifacts due to improved transverse resolution and reduced depth of focus.
- Enhanced differentiation and segmentation of inner retinal vasculature layers were observed.
Conclusions:
- Adaptive optics significantly improves OCTA imaging of retinal vasculature.
- AO-OCTA offers superior visualization, reducing artifacts and aiding in the diagnosis of retinal vascular diseases.
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