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Fiber tracking in diffusion tensor magnetic resonance imaging (DT-MRI, or DTI) offers a unique and nondestructive technique to obtain the three-dimensional organization of myocardial fibers. This technique is however sensitive to various parameters. In this paper, we present a methodology to get insight into how fiber tracking results vary with different parameters such as anisotropy threshold. The...
Diffusion tensor magnetic resonance imaging (DT-MRI, or DTI) is a new technique allowing ex-vivo and/or in-vivo investigation of human fibrous tissues. Processing of DT-MRI data appears as a new field for image processing community. This paper presents an interpolation method for the eigenvector fields in human cardiac DT-MRI. The method accounts for inherent relationships between vector components...
Left ventricular structure has proved to be related with cardiac function; however the relation of myocardial fiber distribution with regional wall motion remains to be elucidated. In this study, both in vivo tagging and ex vivo DTI studies were performed in adult rats. LV circumferential strain, myocardium twist and myocardial fiber architecture were investigated. Results show that myocardial fiber...
This paper investigates the iterative reconstruction of tensor fields in diffusion tensor magnetic resonance imaging (MRI). The gradient constraints on eigenvalue and tensor component images of the diffusion tensor were exploited. A computer-generated phantom was used in order to simulate the diffusion tensor in a cardiac MRI study with a diffusion model that depends on the fiber structure of the...
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