Tracking Large Anterior Mitral Leaflet Displacements by Incorporating Optical Flow in an Active Contours Framework

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2017

Autores

Sultan, MS (Autor) Outra; Martins, N (Autor) Outra; Costa, E (Autor) Outra; Veiga, D (Autor) Outra; Ferreira, MJ (Autor) Outra; Mattos, S (Autor) Outra; Coimbra, M (Autor) FCUP

Ata de Conferência Internacional

Título: Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS

Páginas: 3244-3247

39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2017

11 July 2017 through 15 July 2017

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-00N-61N

DOI: 10.1109/embc.2017.8037548

Abstract (EN): Echocardiography is an important tool to detect early evidence of mitral valve degradation associated with rheumatic heart disease. The segmentation and tracking of the Anterior Mitral Leaflet helps to quantify the morphologic valve anomalies, such as the leaflet thickening, shape and the mobility changes. The tracking of this leaflet throughout the cardiac cycle is still an open challenge in the research community. The widely used active contours segmentation framework fails when faced with large leaflet displacement. In this work, we propose the integration of optical flow in an open-ended active contour framework to address this difficulty. This additional information promotes solutions with contours next to high leaflet displacements, resulting in superior performance. The algorithm was tested on 9 fully annotated real clinical videos, acquired from the parasternal long axis view. The algorithm is compared with our previous work. Results show a clear improvement in situations where the leaflet exhibits large displacement or irregular shapes, with an average error of 4.5 pixels and a standard deviation of 2 pixels.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4