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Biventricular myocardial strains wit...

Tustison, Nicholas James.

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Biventricular myocardial strains with anatomical NURBS models from tagged MRI.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Biventricular myocardial strains with anatomical NURBS models from tagged MRI./
作者:	Tustison, Nicholas James.
面頁冊數:	208 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4703.
Contained By:	Dissertation Abstracts International65-09B.
標題:	Engineering, Biomedical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3147479
ISBN:	0496063049

Biventricular myocardial strains with anatomical NURBS models from tagged MRI.
Tustison, Nicholas James.

Biventricular myocardial strains with anatomical NURBS models from tagged MRI. - 208 p.

Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4703.

Thesis (D.Sc.)--Washington University, 2004.

Current research is presented in which both left and right ventricular deformation is estimated from tagged cardiac magnetic resonance imaging using volumetric deformable models constructed from nonuniform rational B-splines (NURBS). Based on the shape of the left ventricle two 'base surface' parameterizations are investigated---the prolate sphere and the cylinder. The typical formulation of NURBS objects employs a control point Cartesian basis. However, extending the control point basis to include both a prolate-spheroidal and a cylindrical description leads to the consideration of four model types for strain analysis: Cartesian-based NURBS models with both a cylindrical and prolate-spheroidal parameterization, prolate spheroidal-based NURBS models with a prolate-spheroidal parameterization, and cylindrical-based NURBS models with a cylindrical parameterization.

ISBN: 0496063049Subjects--Topical Terms:

1017684
Engineering, Biomedical.

Biventricular myocardial strains with anatomical NURBS models from tagged MRI.
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245 1 0 $a Biventricular myocardial strains with anatomical NURBS models from tagged MRI.
300 $a 208 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4703.
500 $a Director: Amir A. Amini.
502 $a Thesis (D.Sc.)--Washington University, 2004.
520 $a Current research is presented in which both left and right ventricular deformation is estimated from tagged cardiac magnetic resonance imaging using volumetric deformable models constructed from nonuniform rational B-splines (NURBS). Based on the shape of the left ventricle two 'base surface' parameterizations are investigated---the prolate sphere and the cylinder. The typical formulation of NURBS objects employs a control point Cartesian basis. However, extending the control point basis to include both a prolate-spheroidal and a cylindrical description leads to the consideration of four model types for strain analysis: Cartesian-based NURBS models with both a cylindrical and prolate-spheroidal parameterization, prolate spheroidal-based NURBS models with a prolate-spheroidal parameterization, and cylindrical-based NURBS models with a cylindrical parameterization.
520 $a For each frame subsequent to end-diastole, a NURBS model is constructed by fitting two surfaces with the same parameterization to the corresponding set of epicardial and endocardial contours from which a volumetric model is created. Using normal displacements of the three sets of orthogonal tag planes as well as displacements of contour/tag line intersection points and tag plane intersection points, one can solve for the optimal homogeneous coordinates, in a weighted least squares sense, of the control points of the deformed NURBS model at end-diastole using quadratic programming. This allows for subsequent forward displacement fitting from end-diastole to all later time frames. After fitting to all time points of data, lofting the NURBS model for all time points creates a comprehensive 4-D NURBS model. From this model, we can extract 3-D myocardial deformation fields and corresponding strain maps which are local measures of non-rigid deformation.
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