Method and MRI device to detect a direction of at least one fiber in a body
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United States of America Patent
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Dec 9, 2014
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Nov 17, 2011
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Nov 24, 2010
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Abstract
Method to extract a diffusion direction from DW-MR signals, in which a magnetic field gradient qi is applied to a body part, a magnetic resonance signal Si is measured and a diffusion direction μj is determined, wherein for a predetermined positive number m of diffusion direction(s) μj, the signals Si are linked to the probability density function of the random vector X of water molecules displacements represented as a mixture of m probability density functions pXj of random vectors Xj characterizing the diffusion along μj, the Xj being decomposed into a first component modelling directional variability of the water molecules displacements with μj as mean direction, and into a second component modelling the length variability of the water molecules displacements along μj.
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