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  2006, Vol. 19 Issue (6): 782-786    DOI:
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Left Ventricle MRI Images Segmentation by Unifying Level Set Method and Snake Model with Shape Constraints
ZHOU ZeMing1,2, YOU JianJie2, FAN ChunHui1, Pheng Ann Heng3, XIA DeShen2
1.Meteorology College, PLA University of Science and Technology, Nanjing 211101
2.Department of Computer,Nanjing University of Science and Technology , Nanjing 210094
3.Department of Computer Science and Engineering, Chinese University of HongKong, HongKong

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Abstract  A segmentation algorithm for the left ventricle MRI images is proposed by unifying the level set method and the snake model with shape constraints. Due to the weak edges and the low contrast regions, the deformation curve leaks from the outer boundary of the left ventricle when the snake model is used to segment the MRI image of the left ventricle. After the training samples have been aligned and the variation modes have been analyzed, the allowable shape space of the left ventricle is constructed. According to the properties of the cardiac MRI images, the shape constraint energy field around the average shape is created by the level set method. After the shape constraint energy term is added, the snake model can effectively prevent the deformation curve from leaking out of the low contrast regions. The evolving curve is subject to the shape constraints by mapping it to the allowable shape space. The segmentation experiments demonstrate the effectiveness of the proposed model.
Key wordsSnake Model      Level Set Method      Shape Constraint Energy      Segmentation of the Left Ventricle      MRI Images     
Received: 14 October 2005     
ZTFLH: TP391  
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ZHOU ZeMing
YOU JianJie
FAN ChunHui
Pheng Ann Heng
XIA DeShen
Cite this article:   
ZHOU ZeMing,YOU JianJie,FAN ChunHui等. Left Ventricle MRI Images Segmentation by Unifying Level Set Method and Snake Model with Shape Constraints[J]. , 2006, 19(6): 782-786.
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