Publicação

Three-dimensional segmentation and reconstruction of the retinal vasculature from spectral-domain optical coherence tomography

Detalhes bibliográficos
Resumo:	In this work we reconstruct the 3-D shape and location of the retinal vascular network from commercial spectral-domain (SD) optical coherence tomography (OCT) data. The 2-D location of retinal vascular network on the eye fundus is obtained through SVM classification of properly defined fundus images from OCT data,1 taking advantage of the fact that on standard SD-OCT the incident light beam is absorbed by haemoglobin, therefore creating a shadow cast on OCT signal below each perfused vessel. The depth-wise location of the vessel is obtained as the beginning of the shadow. The classification of crossovers and bifurcations within the vascular network is also addressed. We illustrate the feasibility of the method in terms of vessel calibre estimation and the accuracy of bifurcations and crossovers classification.
Autores principais:	Guimarães, Pedro
Outros Autores:	Rodrigues, Pedro; Celorico, Dirce; Serranho, Pedro; Bernardes, Rui
Assunto:	Optical coherence tomography Vascular system Retina
Ano:	2015
País:	Portugal
Tipo de documento:	artigo
Tipo de acesso:	acesso aberto
Instituição associada:	Universidade Aberta
Idioma:	português
Origem:	Repositório Aberto da Universidade Aberta

Descrição
Resumo:	In this work we reconstruct the 3-D shape and location of the retinal vascular network from commercial spectral-domain (SD) optical coherence tomography (OCT) data. The 2-D location of retinal vascular network on the eye fundus is obtained through SVM classification of properly defined fundus images from OCT data,1 taking advantage of the fact that on standard SD-OCT the incident light beam is absorbed by haemoglobin, therefore creating a shadow cast on OCT signal below each perfused vessel. The depth-wise location of the vessel is obtained as the beginning of the shadow. The classification of crossovers and bifurcations within the vascular network is also addressed. We illustrate the feasibility of the method in terms of vessel calibre estimation and the accuracy of bifurcations and crossovers classification.

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