Abstract:OCTA presents characteristic changes in the choriocapillaris layers in cases of choroidal naevi. The association of naevus substance appearing darker with increasing thickness may offer a novel prognostic clue. En face structural OCT may allow accurate, detailed measurement of lateral dimensions which could be of value in the monitoring of suspicious naevi.
“…In a study of 71 eyes, the visibility of nevus in en face OCTA was 79.5%. Moreover, the thickness greater than 120 μm was associated with darker masses in en face OCTA, which could be interpreted as a prognostic factor [ 18 ] (Fig. 1 ).…”
Section: Melanocytic Lesionsmentioning
confidence: 99%
“…It is shown that relatively flat nevi do not alter the outer retinal vessels in OCTA; however, errors in automatic segmentation of retinal layers disturb the visualization of the vasculature in the outer retina in thicker tumours [ 18 ].…”
Optical coherence tomography angiography (OCTA) is a revolutionary method in the visualization of the vascular system in different retinal and choroidal layers. During the last 4 years since the commercial availability of different OCTA devices, attempts have been made to utilize this technology in various aspects of ocular oncology from the differentiation of benign and malignant lesions to assisting in evaluation of post-treatment complications, such as radiation retinopathy. However, current OCTA technology is restricted by various artefacts and inherent limitations, some of which are more pronounced in the presence of elevated tumoural lesions. Imminent advancements in OCTA systems and image acquisition processes promise a great potential for application of OCTA in ocular oncology.
“…In a study of 71 eyes, the visibility of nevus in en face OCTA was 79.5%. Moreover, the thickness greater than 120 μm was associated with darker masses in en face OCTA, which could be interpreted as a prognostic factor [ 18 ] (Fig. 1 ).…”
Section: Melanocytic Lesionsmentioning
confidence: 99%
“…It is shown that relatively flat nevi do not alter the outer retinal vessels in OCTA; however, errors in automatic segmentation of retinal layers disturb the visualization of the vasculature in the outer retina in thicker tumours [ 18 ].…”
Optical coherence tomography angiography (OCTA) is a revolutionary method in the visualization of the vascular system in different retinal and choroidal layers. During the last 4 years since the commercial availability of different OCTA devices, attempts have been made to utilize this technology in various aspects of ocular oncology from the differentiation of benign and malignant lesions to assisting in evaluation of post-treatment complications, such as radiation retinopathy. However, current OCTA technology is restricted by various artefacts and inherent limitations, some of which are more pronounced in the presence of elevated tumoural lesions. Imminent advancements in OCTA systems and image acquisition processes promise a great potential for application of OCTA in ocular oncology.
“…Two recent studies revealed successful vascular evaluation of choroidal nevi and melanomas using SS-OCTA. The first study by Ali et al 10 focused on the use of structural reverse flow to identify choroidal nevi. The second study by Pellegrini et al 11 showed the ability of SS-OCTA to identify tumor microvasculature in choroidal melanomas.…”
The study explores the use of swept-source optical coherence tomography angiography to identify distinguishing vascular features in choroidal nevi and small choroidal melanomas. Choroidal melanomas displayed distinct vascular patterns. The presence of deep choroidal vasculature was more common in choroidal melanomas, even when compared with size-matched elevated choroidal nevi.
“…OCT has improved visibility of the choroid as enhanced depth imaging or swept-source OCT [9][10], autofluorescence scans have confirmed lipofuscin deposition [11] and optical coherence tomography angiography may give information on blood flow. [12] Ultrawide field imaging has been an important addition in this array of imaging modalities because of the ability of capture a wide area of the fundus. In the assessment of intraocular tumours, it has allowed better depiction of the extent of sizable or very peripheral tumours not easily captured with previously available cameras.…”
This study demonstrates the utility of red-green channel patterns in ultrawide field imaging in the assessment of small choroidal melanotic tumours. Results prove this is not a reliable approach for early diagnosis of small melanomas.
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