En-face OCT and OCT angiography analysis of macular choroidal macrovessel

Neto, Carlos A. Moreira; Lima, Luiz H.; Zett, Cláudio; Pereira, Raphael Dias de Mello; Moreira, Carlos Augusto

doi:10.1016/j.ajoc.2021.101012

Cited by 7 publications

(2 citation statements)

References 20 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contrary to fluorescein angiography, OCT-A does not require the injection of invasive contrast and visualizes capillary structures more precisely. En face images visualize individual vascular layers at different depths segmented from the OCT-A volume scans 8 – 10 . These images allow for a much better visualization of microcapillary plexi than fundus images.…”

Section: Introductionmentioning

confidence: 99%

Synthetic OCT-A blood vessel maps using fundus images and generative adversarial networks

Coronado,

Pachade,

Trucco

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Vessel segmentation in fundus images permits understanding retinal diseases and computing image-based biomarkers. However, manual vessel segmentation is a time-consuming process. Optical coherence tomography angiography (OCT-A) allows direct, non-invasive estimation of retinal vessels. Unfortunately, compared to fundus images, OCT-A cameras are more expensive, less portable, and have a reduced field of view. We present an automated strategy relying on generative adversarial networks to create vascular maps from fundus images without training using manual vessel segmentation maps. Further post-processing used for standard en face OCT-A allows obtaining a vessel segmentation map. We compare our approach to state-of-the-art vessel segmentation algorithms trained on manual vessel segmentation maps and vessel segmentations derived from OCT-A. We evaluate them from an automatic vascular segmentation perspective and as vessel density estimators, i.e., the most common imaging biomarker for OCT-A used in studies. Using OCT-A as a training target over manual vessel delineations yields improved vascular maps for the optic disc area and compares to the best-performing vessel segmentation algorithm in the macular region. This technique could reduce the cost and effort incurred when training vessel segmentation algorithms. To incentivize research in this field, we will make the dataset publicly available to the scientific community.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthetic OCT-A blood vessel maps using fundus images and generative adversarial networks

Coronado,

Pachade,

Trucco

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Previous reports have mainly used ICGA; however, in 2021, the first report of the observation of a posterior vortex vein by OCTA was published, and OCTA was considered to be useful for the detection of posterior vortical veins [ 9 ]. Enface-OCT can clearly visualize the choroidal vessels of the posterior pole [ 10 ] and show a greater distinctness than en-face OCTA imaging [ 11 ]. Thus, in this study, we applied enface-OCT to confirm a well-defined macular vortex vein.…”

Section: Discussionmentioning

confidence: 99%

Different Vortex Vein Anomalies Observed in a Single Case: Macular Vortex Vein in One Eye and Varix of Vortex Vein Ampulla in the Other Eye

Nitta,

Akiyama

2024

Cureus

View full text Add to dashboard Cite

We present a 56-year-old female with a macular vortex vein in her right eye and a varix of vortex vein ampulla in the inferior nasal fundus of her left eye. The choroidal lesions were evaluated by multimodal imaging including fundoscopy with contact lens, ultra-widefield fundus photography, swept-souse optical coherence tomography (SS-OCT), enface image of widefield optical coherence tomography (widefield enface-OCT), and ultra-widefield fundus angiography. Widefield enface-OCT revealed submacular large choroidal vessels in the right eye. Ultra-widefield indocyanine green fluorescence angiography (UWICGA) of the right eye showed the dye of those submacular choroidal vessels drained from the ampullae beneath the macula. Fundoscopy revealed an elevated lesion with crescent shadows in the inferior nasal fundus of the left eye. Dynamic fundoscopy with compression of the left eye resulted in a diminishing of the elevation and release of the compression resulted in an enlargement of the elevation. Ultra-widefield fundus photography of the left eye in the right inferior gaze revealed an elevated lesion with a crescent shadow in the inferior nasal fundus, while it is not prominent in the primary gaze. The B-scan of SS-OCT revealed a hyporeflective lesion in the choroid beneath the elevated lesion of the left eye. The elevated lesion was consistent with the vortex vein ampulla on UWICGA. This is the first case where two different choroidal vascular anomalies, macular vortex vein and varix of vortex ampulla, coexist in a single patient. Multimodal imaging is useful to visualize and diagnose choroidal vascular anomalies.

show abstract

Choroidal macrovessel

Agrawal,

Raval

2024

Retinal and Choroidal Vascular Diseases of the Eye

View full text Add to dashboard Cite

En-face OCT and OCT angiography analysis of macular choroidal macrovessel

Cited by 7 publications

References 20 publications

Synthetic OCT-A blood vessel maps using fundus images and generative adversarial networks

Synthetic OCT-A blood vessel maps using fundus images and generative adversarial networks

Different Vortex Vein Anomalies Observed in a Single Case: Macular Vortex Vein in One Eye and Varix of Vortex Vein Ampulla in the Other Eye

Choroidal macrovessel

Contact Info

Product

Resources

About