Hyperspherical von Mises-Fisher mixture (HvMF) modelling of high angular resolution diffusion MRI

作者: Abhir Bhalerao , Carl-Fredrik Westin

DOI: 10.1007/978-3-540-75757-3_29

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摘要: A mapping of unit vectors onto a 5D hypersphere is used to model and partition ODFs from HARDI data. This has number useful interesting properties we make link interpretation the second order spherical harmonic decompositions The paper presents working theory experiments using von Mises-Fisher mixture for directional samples. MLE moment HvMF pdf can also be related fractional anisotropy. We perform error analysis estimation scheme in single multi-fibre regions then show how penalised-likelihood selection method employed differentiate multiple fibre regions.

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