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TitreOCT angiography for the everyday glaucoma practice: a new methodology
Abstract Nr.3010
ButTo develop a new methodology to identify glaucoma patients based on micro-vascular density (mVD) as measured by Optical Coherence Tomography Angiography (angio-OCT).
MéthodesA random eye of 36 healthy subjects (aged 63 ± 12 years) and 33 glaucoma patients (aged 61 ± 8 years with an average visual field loss of -9.5 ± 6.8 dB) were used to build a new angio-OCT evaluation technique (Zeiss Cirrus 5000 HD-OCT). Optic disc centered 3x3mm images were collected. An annular area with an inner radius of 1.16mm and outer radius of 1.44mm was selected as the region of interest (ROI). The lower envelope of each circular line in the ROI was obtained after applying a third-order median filter. Hence, the mVD was calculated averaging each radial line of the ROI. In addition, the average intensity at various spatial locations according to the Garway-Heath sectors was calculated.
RésultatsA significant decrease of the mVD was observed in the glaucoma group for all Garway-Heath sectors (p<0.001). Moreover, mVD in the supero-temporal and infero-temporal sectors was the most discriminative when comparing to the normal group. Lastly, it was also observed that glaucoma contributes to an mVD attenuation of variability between sectors when compared to the healthy group.
ConclusionThe presented technique shows the potential of the mVD measured by angio-OCT to be used in everyday glaucoma practice.
Conflit d'intérêtNon
Auteur 1
NomJESUS
InitialesD
InstitutDeparment of Neurosciences
VilleLeuven
Auteur 2
NomBarbosa Breda
InitialesJ
InstitutDeparment of Neurosciences
VilleLeuven
Auteur 3
NomVan Keer
InitialesK
InstitutDeparment of Neurosciences
VilleLeuven
Auteur 4
NomLemmens
InitialesS
InstitutDepartment of Neurosciences
VilleLeuven
Auteur 5
NomStalmans
InitialesI
InstitutDepartment of Neurosciences
VilleLeuven
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