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Semiautomatic endocardial contour estimation in contrast Echocardiography sequences using guided local search

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Title Semiautomatic endocardial contour estimation in contrast Echocardiography sequences using guided local search
 
Creator BANSOD, P
DESAI, UB
BURKULE, N
 
Subject boundary detection
image segmentation
agent
guided local search
endocardial contour
contrast echocardiography
temporal
multi-frame
 
Description We present a Guided Local Search (GLS) in multi-frame environment for detection of endocardial contours in short axis (SAX) contrast echo cardiographic image sequences. The proposed method requires minimal user intervention at the first frame of the image sequence for specifying the candidate points of the contour. The initial contour is approximated by fitting an ellipse in the region defined by the points specified. First level of regularization on the contour is made by radial gradient search with magnitude and direction. The second level of regularization makes use of GLS algorithm. The GLS with features and constraints for solution space and penalty terms overcome the optimization being trapped in local minima. The proposed method also incorporates the temporal information from the adjacent frames during the regularization process. The subsequent frames in sequence are initialized by the final contour of the previous frame. The algorithm developed was applied to 10 data sets over full cardiac cycle and the results were validated by comparing computer generated boundaries to those manually outlined by one expert. The maximum error in the contours detected was +/- 2.9mm. The application of guided local search algorithm proposed in this paper offers a fast and efficient method for semiautomatic segmentation of heart chambers in 2D contrast echocardiography sequences.
 
Publisher INT INST INFORMATICS & SYSTEMICS
 
Date 2011-10-26T05:14:18Z
2011-12-15T09:11:54Z
2011-10-26T05:14:18Z
2011-12-15T09:11:54Z
2007
 
Type Proceedings Paper
 
Identifier INT CONF ON CYBERNETICS AND INFORMATION TECHNOLOGIES, SYSTEMS AND APPLICATIONS/INT CONF ON COMPUTING, COMMUNICATIONS AND CONTROL TECHNOLOGIES, VOL 1,70-75
978-1-934272-07-7
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15919
http://hdl.handle.net/100/2366
 
Source 4th International Conference on Cybernetics and Information Technologies, Systems and Applications/5th Int Conf on Computing, Communications and Control Technologies,Orlando, FL,JUL 12-15, 2007
 
Language English