Projects:AblationScarSegmentation - Revision history

Mdepa at 21:08, 30 March 2011

2011-03-30T21:08:48Z

2010-02-16T21:56:49Z

Results

2010-02-16T21:54:16Z

Results

2010-02-16T21:51:05Z

2010-02-16T21:50:31Z

Description

2010-02-16T21:49:10Z

Cardiac ablation scar segmentation

2010-02-16T21:48:01Z

Key Investigators

2010-02-16T21:47:51Z

Key Investigators

2010-02-16T21:47:38Z

2010-02-16T21:43:45Z

← Older revision		Revision as of 21:08, 30 March 2011
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	*BWH: Ehud Schmidt and Ron Kikinis		*BWH: Ehud Schmidt and Ron Kikinis
		+
		+	= Publications =
		+
		+	[http://www.na-mic.org/publications/pages/display?search=Projects%3AAblationScarSegmentation&submit=Search&words=all&title=checked&keywords=checked&authors=checked&abstract=checked&sponsors=checked&searchbytag=checked\| NA-MIC Publications Database on Left Atrium Segmentation]

← Older revision		Revision as of 21:56, 16 February 2010
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−	Finally, we show some preliminary results of our cardiac ablation scar segmentation obtained using this prior ~~spatial~~ knowledge and intensity thresholding. The figure on the right also shows an expert manual segmentation of the scar alongside our result.	+	Finally, we show some preliminary results of our cardiac ablation scar segmentation obtained using this spatial prior knowledge and intensity thresholding. The figure on the right also shows an expert manual segmentation of the scar alongside our result.

	{\|		{\|

@@ Line 15: / Line 15: @@
 == Results ==
-Here we present results we have obtained for one subject using our methods. In the following images, we show the left atrium segmentation in the MRA image as an outline in one slice as well as a 3D visualization.
+Here we present results we have obtained for one subject using our methods. In the following images, we show the left atrium segmentation in the MRA image as an outline in one slice as well as a 3D model.
 {|

@@ Line 26: / Line 26: @@
 {|
-| [[Image:Mdepa_MRA_MDE_registration.png|300px]]
+| [[Image:Mdepa_MRA_MDE_registration.png|320px]]
 | [[Image:Mdepa_MDE_la_segmentation.png|250px]]
 |}

@@ Line 11: / Line 11: @@
 We work with two types of images for each patient: MR angiography (MRA) images where the blood pool has a higher intensity than surrounding tissue and post-procedure delayed enhancement MR images (DE-MRI) where a contrast agent has been injected into the patient to enhance the ablation scar. Our approach is to first segment the left atrium in the MRA images using the label fusion algorithm described in [1]. We then transfer this segmentation to the DE-MRI image of the same patient by registering the two images.
-Since the ablation scar we are trying to segment is known to be located on the left atrium myocardium, we use this spatial prior information to reduce the search space for the ablation scar to only a small vicinity of the left atrium surface. This avoids many false positives caused by the noise in the DE-MRI images. We are continuing to explore different segmentation methods in this ongoing work.
+Since the ablation scar we are trying to segment is known to be located on the left atrium myocardium, we use this spatial prior information to reduce the search space for the ablation scar to only a small vicinity of the left atrium surface. This avoids many false positives caused by the noise in the DE-MRI images. We will be exploring different segmentation methods in this ongoing work.
 == Results ==
@@ Line 37: / Line 37: @@
 | [[Image:Mdepa_MDE_scar_seg_3D.png|350px]]
 |}
 = Literature =

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 Atrial fibrillation is one of the most common heart conditions and can have very serious consequences such as stroke and heart failure. A technique called catheter radio-frequency (RF) ablation has recently emerged as a treatment. It involves burning the cardiac tissue that is responsible for the fibrillation. Even though this technique has been shown to work fairly well on atrial fibrillation patients, repeat procedures are often needed to fully correct the condition because surgeons lack the necessary tools to quickly evaluate the success of the procedure.
-We propose a method to automatically segment the scar created by RF ablation in delayed enhancement MR images acquired after the procedure. This provides surgeons with a visualization showing the size, shape and location of the scar, which is information central to evaluating the outcome of the procedure.
+We propose a method to automatically segment the scar created by RF ablation in delayed enhancement MR images acquired after the procedure. This will provide surgeons with a visualization showing the size, shape and location of the scar, which is information central to evaluating the outcome of the procedure.
 = Description =

@@ Line 44: / Line 44: @@
 = Key Investigators =
-*MIT: [[http://people.csail.mit.edu/mdepa/ Michal Depa]] and Polina Golland
+*MIT: [http://people.csail.mit.edu/mdepa/ Michal Depa] and Polina Golland
 *BWH: Ehud Schmidt and Ron Kikinis

@@ Line 18: / Line 18: @@
 {|
-| [[Image:Mdepa_MRA_seg.png|style="height:200px"]]
+| [[Image:Mdepa_MRA_seg.png|200px]]
-| [[Image:Mdepa_MRA_seg_3D.png|style="height:200px"]]
+| [[Image:Mdepa_MRA_seg_3D.png|250px]]
 |}