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Updated: Jul 12, 2026
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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
Published on: August 4, 2018
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[Optical coherence tomography angiography (OCT‑A) in rats].
J H Meyer1, P P Fang1, T U Krohne1
1Universitäts-Augenklinik Bonn, Ernst-Abbe-Str. 2, 53127, Bonn, Deutschland.
Summary
Optical coherence tomography angiography (OCT-A) enables non-invasive, 3D visualization of retinal and chorioidal vasculature in rats. This advanced imaging may replace traditional fluorescein angiography for studying angiogenic processes in animal models.
Area of Science:
- Ophthalmology
- Medical Imaging
- Animal Models
Background:
- Optical coherence tomography angiography (OCT-A) offers non-invasive, 3D visualization of retinal and chorioidal vasculature.
- Evaluating novel imaging modalities in animal models is crucial for advancing research.
Purpose of the Study:
- To evaluate the utility of OCT-A for imaging retinal and chorioidal vascular structures in rats.
- To compare OCT-A with conventional fluorescein angiography (FA) in a rodent model.
Main Methods:
- In vivo imaging was performed in Dark Agouti rats using OCT-A and confocal scanning laser ophthalmoscopy (cSLO).
- OCT-A en-face images were compared to cSLO FA images.
- Histological examination was used for correlation.
Main Results:
- OCT-A, with minor modifications, is applicable to rodents, providing high-resolution, depth-selective images of retinal and choroidal vascular networks.
- OCT-A demonstrated superior resolution and 3D localization compared to FA, especially in deeper layers.
- A limitation is the relatively small field of view with OCT-A.
Conclusions:
- OCT-A allows for 3D in vivo detection of vascular changes in rodents without dye injection.
- OCT-A shows potential to replace FA for specific research questions in animal models.
- This technique will be valuable for studying retinal and chorioidal angiogenesis in physiological and pharmacological contexts.
