2012 Winter Project Week:PelvicRegistration - Revision history

Moradi at 07:56, 13 January 2012

2012-01-13T07:56:34Z

Moradi at 07:54, 13 January 2012

2012-01-13T07:54:31Z

Moradi at 07:53, 13 January 2012

2012-01-13T07:53:11Z

Moradi at 07:52, 13 January 2012

2012-01-13T07:52:09Z

Moradi at 07:51, 13 January 2012

2012-01-13T07:51:24Z

Moradi at 07:50, 13 January 2012

2012-01-13T07:50:27Z

Moradi: /* Investigators at Brigham and Women's */

2012-01-13T07:34:09Z

Investigators at Brigham and Women's

Moradi: /* Investigators at Brigham and Women's */

2012-01-13T07:32:29Z

Investigators at Brigham and Women's

Moradi at 04:38, 22 December 2011

2011-12-22T04:38:30Z

Moradi at 04:37, 22 December 2011

2011-12-22T04:37:49Z

@@ Line 41: / Line 41: @@
 Validation is a challenge as landmarks that can be matched from ultrasound and MRI are hard to find in the prostate gland. In one case, calcification is visible in both modalities. Based solely on this landmark, solution (2) appears more accurate. We are planning to consult with clinicians and acquire their feedback on the comparisons of these methods, and validation methods.
 <gallery>
-File:Mr_us_pros.PNG
+File:Mr_us_pros.PNG|[[MR to ultrasound registration, using solutions (1) described in the (progress) section above.]]
 </gallery>
 </div>
 <div style="width: 97%; float: left;">

@@ Line 41: / Line 41: @@
 Validation is a challenge as landmarks that can be matched from ultrasound and MRI are hard to find in the prostate gland. In one case, calcification is visible in both modalities. Based solely on this landmark, solution (2) appears more accurate. We are planning to consult with clinicians and acquire their feedback on the comparisons of these methods, and validation methods.
 <gallery>
-Image:mr_us_pros.png|
+File:Mr_us_pros.PNG
 </gallery>
 </div>
 <div style="width: 97%; float: left;">

@@ Line 41: / Line 41: @@
 Validation is a challenge as landmarks that can be matched from ultrasound and MRI are hard to find in the prostate gland. In one case, calcification is visible in both modalities. Based solely on this landmark, solution (2) appears more accurate. We are planning to consult with clinicians and acquire their feedback on the comparisons of these methods, and validation methods.
 <gallery>
-File:mr_us_pros.png|
+Image:mr_us_pros.png|
 </gallery>
 </div>
 <div style="width: 97%; float: left;">

@@ Line 40: / Line 40: @@
 Validation is a challenge as landmarks that can be matched from ultrasound and MRI are hard to find in the prostate gland. In one case, calcification is visible in both modalities. Based solely on this landmark, solution (2) appears more accurate. We are planning to consult with clinicians and acquire their feedback on the comparisons of these methods, and validation methods.
+<gallery>
 File:mr_us_pros.png|
+</gallery>
 </div>
 <div style="width: 97%; float: left;">

@@ Line 41: / Line 41: @@
 Validation is a challenge as landmarks that can be matched from ultrasound and MRI are hard to find in the prostate gland. In one case, calcification is visible in both modalities. Based solely on this landmark, solution (2) appears more accurate. We are planning to consult with clinicians and acquire their feedback on the comparisons of these methods, and validation methods.
-Image:mr_us_pros.png
+File:mr_us_pros.png|
 </div>
 <div style="width: 97%; float: left;">

← Older revision		Revision as of 07:34, 13 January 2012
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	We will first examine solutions available in Slicer.		We will first examine solutions available in Slicer.

−	We have also implemented a surface based registration algorithm with elastic energy as the penalty for the deformation. Ultrasound images are collected using a stepper, with fixed slice spacing in the axial view. The object is segmented (contoured) in both MRI and ultrasound images and a surface model is created. Gaussian mapping of the surface reduces the registration problem to finding an appropriate rotation of the coordinate systems that minimizes a cost function. This cost is the elastic energy of deforming the surface from MRI to US configuration.	+	We have also implemented a surface based registration algorithm with elastic energy as the penalty for the deformation. Ultrasound images are collected using a stepper, with fixed slice spacing in the axial view. The object is segmented (contoured) in both MRI and ultrasound images and a surface model is created.
		+

@@ Line 22: / Line 22: @@
 <div style="width: 27%; float: left; padding-right: 3%;">
 <h3>Approach, Plan</h3>
-We use a surface based registration algorithm with elastic energy as the
-penalty for the deformation. Ultrasound images are collected using a stepper, with fixed slice spacing in the axial view. The object is segmented (contoured) in both MRI and ultrasound images and a surface model is created.  Gaussian mapping of the surface reduces the registration problem to finding an appropriate rotation of the coordinate systems that minimizes a cost function. This cost is the elastic energy of deforming the surface from MRI to US sconfiguration.
+We will first examine solutions available in Slicer.
@@ Line 32: / Line 36: @@
 <h3>Progress</h3>
+During the project week, two solutions were applied to an available dataset. The dataset included three sets of 3D ultrasound and MRI images from three different cases. For all these cases manual segmentation provided by a clinician was available. 1) We used Slicer 4 to implement image-based 3D deformable registration of image labels (results of segmentation) and then apply the resulting warping to the moving (MRI) image. 2) We used the Slicer 3.6 implementation of ICP registration to align the 3D models created from the segmented labels from MRI and ultrasound. Based on this initial alignment, we equalized the length of the base-apex axis of the prostate gland in the two modalities. Then, we updated the label volumes and applied image-based registration (Rigid, affine and deformable) to the updated label maps.
 </div>
 <div style="width: 97%; float: left;">

@@ Line 1: / Line 1: @@
-_NOTOC__
+Project Title: '''Surface-based 3D deformable registration of ultrasound and MRI prostate volumes'''
 <gallery>
 Image:PW-SLC2012.png|[[2012_Winter_Project_Week#Projects|Projects List]]
@@ Line 5: / Line 5: @@
 </gallery>
-Project Title: '''Surface-based 3D deformable registration of ultrasound and MRI prostate volumes'''
 ==Investigators at Brigham and Women's ==