中国科学院深圳先进技术研究院机构知识库(SIAT OpenIR): Meshless deformable models for 3D cardiac motion and strain analysis from tagged MRI
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Meshless deformable models for 3D cardiac motion and strain analysis from tagged MRI
Xiaoxu Wang; Ting Chen; Shaoting Zhang; Joël Schaerer; Zhen Qian; Suejung Huh; Dimitris Metaxas; Leon Axel
2015
Source PublicationMagnetic Resonance Imaging
Subtype期刊论文
AbstractTagged magnetic resonance imaging (TMRI) provides a direct and noninvasive way to visualize the in-wall deformation of the myocardium. Due to the through-plane motion, the tracking of 3D trajectories of the material points and the computation of 3D strain field call for the necessity of building 3D cardiac deformable models. The intersections of three stacks of orthogonal tagging planes are material points in the myocardium. With these intersections as control points, 3D motion can be reconstructed with a novel meshless deformable model (MDM). Volumetric MDMs describe an object as point cloud inside the object boundary and the coordinate of each point can be written in parametric functions. A generic heart mesh is registered on the TMRI with polar decomposition. A 3D MDM is generated and deformed with MR image tagging lines. Volumetric MDMs are deformed by calculating the dynamics function and minimizing the local Laplacian coordinates. The similarity transformation of each point is computed by assuming its neighboring points are making the same transformation. The deformation is computed iteratively until the control points match the target positions in the consecutive image frame. The 3D strain field is computed from the 3D displacement field with moving least squares. We demonstrate that MDMs outperformed the finite element method and the spline method with a numerical phantom. Meshless deformable models can track the trajectory of any material point in the myocardium and compute the 3D strain field of any particular area. The experimental results on in vivo healthy and patient heart MRI show that the MDM can fully recover the myocardium motion in three dimensions.
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Indexed BySCI
Language英语
Department医学图像与数字手术研究室
Document Type期刊论文
Identifierhttp://ir.siat.ac.cn/handle/172644/7084
Collection医工所
AffiliationMagnetic Resonance Imaging
Recommended Citation
GB/T 7714
Xiaoxu Wang,Ting Chen,Shaoting Zhang,et al. Meshless deformable models for 3D cardiac motion and strain analysis from tagged MRI[J]. Magnetic Resonance Imaging,2015.
APA Xiaoxu Wang.,Ting Chen.,Shaoting Zhang.,Joël Schaerer.,Zhen Qian.,...&Leon Axel.(2015).Meshless deformable models for 3D cardiac motion and strain analysis from tagged MRI.Magnetic Resonance Imaging.
MLA Xiaoxu Wang,et al."Meshless deformable models for 3D cardiac motion and strain analysis from tagged MRI".Magnetic Resonance Imaging (2015).
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