Reconstruction of Scattered Data in Fetal Diffusion MRIReport as inadecuate




Reconstruction of Scattered Data in Fetal Diffusion MRI - Download this document for free, or read online. Document in PDF available to download.

1 LSIIT LSIIT - Laboratoire des Sciences de l-Image, de l-Informatique et de la Télédétection 2 Service de radiologie Strasbourg 3 BICG, Dept. of Pediatrics 4 LSIIT - Laboratoire des Sciences de l-Image, de l-Informatique et de la Télédétection

Abstract : In this paper we present a method for reconstructing diffusion-weighted MRI data on regular grids from scattered data. The proposed method has the advantage that no specific diffusion model needs to be assumed. Previous work assume the tensor model, but this is not suitable under certain conditions like intravoxel orientational heterogeneity IVOH. Data reconstruction is particularly important when studying the fetal brain in utero, since registration methods applied for movement and distortion correction produce scattered data in spatial and diffusion domains. We propose the use of a groupwise registration method, and a dual spatio-angular interpolation by using radial basis functions RBF. Leave-one-out experiments performed on adult data showed a high accuracy of the method. The application to fetal data showed an improvement in the quality of the sequences according to objective criteria based on fractional anisotropy FA maps, and differences in the tractography results.





Author: Estanislao Oubel - Mériam Koob - Colin Studholme - Jean-Louis Dietemann - François Rousseau -

Source: https://hal.archives-ouvertes.fr/



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