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Clinical diagnosis and quantification of liver disease have been improved through the development of techniques using contrast-enhanced liver MRI sequences. To qualitatively or quantitatively analyze such image sequences, one first needs to correct for rigid and non-rigid motion of the liver. For motion correction of the liver, we have employed bi-directional local correlation coefficient Demons,...
Biological soft and fluid tissues, due to the high percentage of water, are nearly incompressible and consequently their velocity fields are nearly divergence-free. The two most commonly used types of vector field representation are piece-wise continuous representations, which are used in the finite element method (FEM), and discrete representations, which are used in the finite difference method...
This paper presents a novel method for the construction of endocardial and epicardial surface models from 3D short-axis cardiac magnetic resonance images with strongly anisotropic voxels in the long-axis direction. The same algorithm is independently used to generate the surface meshes of the epicardium and endocardium of the four cardiac chambers. The proposed method provides smooth meshes of the...
This paper presents a method for the deformation recovery of the left ventricular (LV) wall from cine MRI. The method is based on a 4D deformable model that is incompressible, a desired property since the myocardium has been shown to be nearly incompressible. The 4D model is continuous in time and the three spatial dimensions, which allows the computation of cardiac motion parameters anywhere in space...
This paper presents a method for 3D deformation recovery of the left ventricular (LV) wall from anatomical cine magnetic resonance imaging (MRI). The method is based on a de- formable model that is incompressible, a desired property since the myocardium has been shown to be nearly incompressible. The LV wall needs to be segmented in an initial frame after which the method automatically determines...
Deep brain stimulation (DBS) surgery can significantly improve the quality of life for patients suffering from movement disorders, but the outcome of the surgery greatly depends on the implantation accuracy of the deep brain stimulator. A few millimeter shift in the mid-brain region can influence the results because the pre-operative planning is based on the assumption that anatomical structures do...
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