Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

A semi-automated method for measuring the evolution of both lumen area and blood flow in carotid from Phase Contrast MRI

Abstract : Phase-Contrast (PC) velocimetry Magnetic Resonance Imaging (MRI) is a useful modality to explore cardiovascular pathologies, but requires the automatic segmentation of vessels and the measurement of both lumen area and blood flow evolutions. In this paper, we propose a semi-automated method for extracting lumen boundaries of the carotid artery and compute both lumen area and blood flow evolutions over the cardiac cycle. This method uses narrow band region-based active contours in order to correctly capture the lumen boundary without being corrupted by surrounding structures. This approach is compared to traditional edge-based active contours, considered in related works, which significantly underestimate lumen area and blood flow. Experiments are performed using both a sequence of a homemade phantom and sequences of 20 real carotids, including a comparison with manual segmentation performed by a radiologist expert. Results obtained on the phantom sequence show that the edge-based approach leads to an underestimate of carotid lumen area and related flows of respectively 18.68% and 4.95%. This appears significantly larger than weak errors obtained using the region-based approach (respectively 2.73% and 1.23%). Benefits appear even better on the real sequences. The edge-based approach leads to underestimates of 40.88% for areas and 13.39% for blood flows, compared to limited errors of 7.41% and 4.6% with our method. Experiments also illustrate the high variability and therefore the lack of reliability of manual segmentation.
Type de document :
Article dans une revue
Liste complète des métadonnées
Contributeur : Okina Univ Angers Connectez-vous pour contacter le contributeur
Soumis le : mercredi 1 avril 2020 - 23:41:14
Dernière modification le : vendredi 19 novembre 2021 - 14:46:13




Jean-Baptiste Fasquel, Aldéric Lécluse, Christine Cavaro-Ménard, Serge Willoteaux. A semi-automated method for measuring the evolution of both lumen area and blood flow in carotid from Phase Contrast MRI. Computers in Biology and Medicine, Elsevier, 2015, 66, pp.269-277. ⟨10.1016/j.compbiomed.2015.09.017⟩. ⟨hal-02528742⟩



Consultations de la notice