BACKGROUND AND OBJECTIVE: To describe the presence of eyelashes artifact in ultra-widefield swept-source optical coherence tomography angiography (SS-OCTA) images. PATIENTS AND METHODS: In this prospective, cross-sectional study, 52 healthy, young subjects were imaged with the SS-OCTA system. OCTA scans were taken in primary and extremes of gaze, and a montage was automatically created. The en face choriocapillaris images were then exported, and a semi-automated algorithm was used for subsequent quantitative analysis. RESULTS: The authors noted the presence of some linear regions of reduced brightness, which were assumed to represent a shadow effect due to patient eyelashes. In order to quantify this effect, the authors performed a quantitative analysis of the superior and inferior regions in the retinal and choroidal vessels. CONCLUSIONS: The authors' qualitative and quantitative analysis showed the presence of regions of false-positive hypoperfusion secondary to eyelashes artifacts. To the authors' knowledge, this represents the first description of this new type of shadowing artifact affecting OCTA images.
Eyelashes artifact in ultra-widefield optical coherence tomography angiography / Borrelli, E.; Viggiano, P.; Evangelista, F.; Toto, L.; Mastropasqua, R.. - In: OPHTHALMIC SURGERY, LASERS & IMAGING RETINA. - ISSN 2325-8160. - 50:11(2019), pp. 740-743. [10.3928/23258160-20191031-11]
Eyelashes artifact in ultra-widefield optical coherence tomography angiography
Mastropasqua R.
2019
Abstract
BACKGROUND AND OBJECTIVE: To describe the presence of eyelashes artifact in ultra-widefield swept-source optical coherence tomography angiography (SS-OCTA) images. PATIENTS AND METHODS: In this prospective, cross-sectional study, 52 healthy, young subjects were imaged with the SS-OCTA system. OCTA scans were taken in primary and extremes of gaze, and a montage was automatically created. The en face choriocapillaris images were then exported, and a semi-automated algorithm was used for subsequent quantitative analysis. RESULTS: The authors noted the presence of some linear regions of reduced brightness, which were assumed to represent a shadow effect due to patient eyelashes. In order to quantify this effect, the authors performed a quantitative analysis of the superior and inferior regions in the retinal and choroidal vessels. CONCLUSIONS: The authors' qualitative and quantitative analysis showed the presence of regions of false-positive hypoperfusion secondary to eyelashes artifacts. To the authors' knowledge, this represents the first description of this new type of shadowing artifact affecting OCTA images.Pubblicazioni consigliate
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