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Updated: Jan 28, 2026
09:56
In Vivo Multimodal Imaging and Analysis of Mouse Laser-Induced Choroidal Neovascularization Model
Published on: January 21, 2018
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Choroidal neovascularization imaging using multiple en face optical coherence tomography angiography image averaging.
Sakura Murakawa1, Ichiro Maruko2, Taizo Kawano1
1Department of Ophthalmology, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku-ku, Tokyo, 162-8666, Japan.
Summary
Averaging five optical coherence tomography angiographic (OCTA) images significantly improves image quality for choroidal neovascularization (CNV) by reducing noise. This technique enhances diagnostic clarity without altering crucial vascular density measurements in CNV patients.
Area of Science:
- Ophthalmology
- Medical Imaging
- Biomedical Engineering
Background:
- Choroidal neovascularization (CNV) is a leading cause of vision loss.
- Optical coherence tomography angiography (OCTA) is a key imaging modality for visualizing CNV.
- Image quality in OCTA can be affected by noise and motion artifacts.
Purpose of the Study:
- To evaluate the impact of averaging five en face OCTA images on image quality in eyes with CNV.
- To assess whether image averaging affects quantitative metrics such as vascular density.
Main Methods:
- Twenty-seven eyes with CNV underwent OCTA imaging.
- Single images (S-images) and averages of five images (A-images) of the same region were analyzed.
- Image quality was assessed using peak signal-to-noise ratio (PSNR), vascular density (VD), and fractal dimension (FD).
Main Results:
- A-images showed significantly higher PSNR compared to S-images (14.0 vs 12.2, P < 0.01).
- Vascular density (VD) did not differ significantly between A-images and S-images (34.8% vs 33.6%, P > 0.1).
- Fractal dimension (FD) was significantly lower in A-images (1.54 vs 1.67, P < 0.01).
Conclusions:
- Averaging OCTA images enhances overall image quality by reducing noise.
- The improvement in quality is attributed to the removal of noise components without affecting blood vessel signals.
- This technique offers a valuable method for improving the diagnostic accuracy of OCTA in CNV.
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