Ferdoesi Univesrity of Mashhad, Department of Electrical Engineering
Abstract: (7868 Views)
The stochastic active contour scheme (STACS) is a well-known and frequently-used approach
for
segmentation of the endocardium boundary in cardiac magnetic resonance (CMR) images. However, it
suffers significant difficulties with image inhomogeneity due to using a region-based term based
on the
global Gaussian probability density functions of the innerouter regions of the active contour. On
the other
hand, the local binary fitting (LBF) provides suitable results for segmentation of inhomogeneous
regions
because of employing a local Gaussian kernel function.In this paper, we propose a new active
contour for
inhomogeneous CMR images segmentation by substituting the region-based term of STACS with the
corresponding energy functional of LBF.Furthermore, we automatically adjust weighting coefficients
of the proposed energy functional according to the simulated annealing algorithm. The
performance of the proposed method has been demonstrated on fourteen CMR images. All benchmark
images are selected at the end of diastolicsystolic phase of the cardiac cycle. Furthermore, for
each benchmark CMR image, the desired boundary was delineated by an expert. Experimental results
demonstrated that compared to the geometric active contour, active contour without edge and STACS
the proposed method provides significantly superior performance for segmentation of the endocardium
boundary of left ventricle of the human heart.
Type of Study:
Research |
Subject:
Paper Received: 2013/09/7 | Accepted: 2014/05/26 | Published: 2014/09/8 | ePublished: 2014/09/8