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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 8    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 8,August 2012
An Automated 3D Segmented and DWT Enhanced Model for Brain MRI
Full Text(PDF, )  PP.780-786  
Author(s)
B. Naresh Kumar, Dr.M.Sailaja
KEYWORDS
3-D segmentation, deformable models, brai
ABSTRACT
This correspondence deals with the development of an automated 3-D segmentation and DWT enhanced model for Brain MRI. The proposal model of segmentation is a model-based approach for accurate, robust, and automated tissue segmentation of brain MRI data of single as well as multiple magnetic resonance sequences. The main contribution of this study is that we employ an edge-based geodesic active Contour for the segmentation task by integrating both image edge geometry and voxel statistical homogeneity into a novel hybrid geometric-statistical feature to regularize contour convergence and extract complex anatomical structures. We validate the accuracy of the segmentation results on simulated brain MRI scans of single T1-weighted and multiple T1/ T2/PD weighted sequences. When compared to a current state of- the-art region based level-set segmentation formulation, our white matter and gray matter segmentation resulted in significantly higher accuracy levels with a mean improvement in Dice similarity indexes and The proposed resolution enhancement technique uses DWT to decompose the input image into different sub bands. Then, the high-frequency sub band images and the input low-resolution image have been interpolated, followed by combining all these images to generate a new resolution-enhanced image by using inverse DWT. In order to achieve a sharper image, an intermediate stage for estimating the high-frequency sub bands has been proposed. The proposed technique has been tested on brain MRI images. The quantitative (peak signal-to-noise ratio and root mean square error) and visual results show the superiority of the proposed technique over the conventional and state-of-art image resolution enhancement techniques. Thus the development of the project is done using MATLAB simulation for results.
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