A new Probabilistic Active Contour region-based method for multiclass medical image segmentation

Published on Mar 1, 2019in Medical & Biological Engineering & Computing2.022
· DOI :10.1007/S11517-018-1896-Y
Edgar R. Arce-Santana11
Estimated H-index: 11
(Universidad Autónoma de San Luis Potosí),
Aldo R. Mejia-Rodriguez4
Estimated H-index: 4
(Universidad Autónoma de San Luis Potosí)
+ 5 AuthorsGiovanna Rizzo34
Estimated H-index: 34
Sources
Abstract
In medical imaging, the availability of robust and accurate automatic segmentation methods is very important for a user-independent and time-saving delineation of regions of interest. In this work, we present a new variational formulation for multiclass image segmentation based on active contours and probability density functions demonstrating that the method is fast, accurate, and effective for MRI brain image segmentation. We define an energy function assuming that the regions to segment are independent. The first term of this function measures how much the pixels belong to each class and forces the regions to be disjoint. In order for this term to be outlier-resistant, probability density functions were used allowing to define the structures to be segmented. The second one is the classical regularization term which constrains the border length of each region removing inhomogeneities and noise. Experiments with synthetic and real images showed that this approach is robust to noise and presents an accuracy comparable to other classical segmentation approaches (in average DICE coefficient over 90% and ASD below one pixel), with further advantages related to segmentation speed.
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