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Variational level-set segmentation and tracking of left ventricle using field prior

Afshin, Mariam et Ben Ayed, Ismail et Islam, Ali et Ross, Ian et Peters, Terry et Li, Shuo. 2011. « Variational level-set segmentation and tracking of left ventricle using field prior ». In Progress in Biomedical Optics and Imaging (Lake Buena Vista, FL, USA, Feb. 14-16, 2011) Coll. « Proceedings of SPIE », vol. 7962. SPIE.

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Résumé

This study investigates a novel method of tracking Left Ventricle (LV) curve in Magnetic Resonance (MR) sequences. The method focuses on energy minimization by level-set curve boundary evolution. The level-set framework allows introducing knowledge of the field prior on the solution. The segmentation in each particular time relies not only on the current image but also the segmented image from previous phase. Field prior is defined based on the experimental fact that the mean logarithm of intensity inside endo and epi-cardium is approximately constant during a cardiac cycle. The solution is obtained by evolving two curves following the Euler-Lagrange minimization of a functional containing a field constraint. The functional measures the consistency of the field prior over a cardiac sequence. Our preliminary results show that the obtained segmentations are very well correlated with those manually obtained by experts. Furthermore, we observed that the proposed field prior speeds up curve evolution significantly and reduces the computation load.

Type de document: Compte rendu de conférence
Professeur:
Professeur
Ben Ayed, Ismail
Affiliation: Autres
Date de dépôt: 11 sept. 2015 15:27
Dernière modification: 01 déc. 2015 14:25
URI: http://espace2.etsmtl.ca/id/eprint/10505

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