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	<title>2008 Summer Project Week:MRSegmentationWithoutAtlas - Revision history</title>
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		<title>Tammy: New page: {| |Project Week Main Page ]] |}   __NOTOC__   ===Key Investigators=== * MIT: Tammy Riklin-Raviv, Polina Gol...</title>
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		<updated>2008-06-11T20:59:32Z</updated>

		<summary type="html">&lt;p&gt;New page: {| |&lt;a href=&quot;/wiki/File:ProjectWeek-2008.png&quot; title=&quot;File:ProjectWeek-2008.png&quot;&gt;thumb|320px|Return to [[2008_Summer_Project_Week|Project Week Main Page&lt;/a&gt; ]] |}   __NOTOC__   ===Key Investigators=== * MIT: Tammy Riklin-Raviv, Polina Gol...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{|&lt;br /&gt;
|[[Image:ProjectWeek-2008.png|thumb|320px|Return to [[2008_Summer_Project_Week|Project Week Main Page]] ]]&lt;br /&gt;
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__NOTOC__&lt;br /&gt;
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===Key Investigators===&lt;br /&gt;
* MIT: Tammy Riklin-Raviv, Polina Golland&lt;br /&gt;
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&amp;lt;h1&amp;gt;Objective&amp;lt;/h1&amp;gt;&lt;br /&gt;
Our objective is the simultaneous segmentation of N aligned MR images where the regions of interest are corresponding anatomical (brain) structures across N subjects.&lt;br /&gt;
We assume that a probability atlas is not available.&lt;br /&gt;
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&amp;lt;h1&amp;gt;Approach, Plan&amp;lt;/h1&amp;gt;&lt;br /&gt;
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We developed an EM approach for the simultaneous segmentation of N images while alternately estimating the probability map of the region of interest based on the segmentations obtained in the previous iteration.&lt;br /&gt;
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In the project week we plan to test the algorithm developed on the UNC Autism MRI data. &lt;br /&gt;
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&amp;lt;h1&amp;gt;Progress&amp;lt;/h1&amp;gt;&lt;br /&gt;
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We have implemented the algorithm and tested it on MRI images of 50 subjects. &lt;br /&gt;
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===References===&lt;br /&gt;
&lt;br /&gt;
T.F. Chan and L.A. Vese, &amp;quot;Active Contours Without Edges&amp;quot;,&lt;br /&gt;
Image Processing, vol. 10, pp. 266-277, 2001.&lt;br /&gt;
&lt;br /&gt;
K. Van Leemput and F. Maes and D. Vandermeulen and P. Suetens,&lt;br /&gt;
&amp;quot;Automated model-based tissue classification of {MR} images of the brain&amp;quot;,&lt;br /&gt;
IEEE transactions on medical imaging,&lt;br /&gt;
vol. 18, no. 10, pp. 897-908, 1999.&lt;/div&gt;</summary>
		<author><name>Tammy</name></author>
		
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