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Title of Journal: J Med Syst

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Abbravation: Journal of Medical Systems

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Springer US

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DOI

10.1002/recl.19590781205

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ISSN

1573-689X

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Liver Isolation in Abdominal MRI

Authors: Rajasvaran Logeswaran Tan Wooi Haw Shakowat Zaman Sarker
Publish Date: 2008/02/09
Volume: 32, Issue: 4, Pages: 259-268
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Abstract

This work presents a method for liver isolation in magnetic resonance imaging MRI abdomen images It is based on a priori statistical information about the shape of the liver obtained from a training set using the segmentation approach Morphological watershed algorithm is used as a key technique as it is a simple and intuitive method producing a complete division of the image in separated regions even if the contrast is poor and it is fast with possibility for parallel implementation To overcome the oversegmentation problem of the watershed process image preprocessing and postprocessing are applied Morphological smoothing Gaussian smoothing intensity thresholding gradient computation and gradient thresholding are proposed for preprocessing with morphological and graph based region adjacent list constructed for region merging A new integrated region similarity function is also defined for region merging control The proposed method produces good isolation of liver in axial MRI images of the abdomen as is shown in this paper

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