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dti (version 0.8-1)

dwiQball-methods: Methods for Function `dwiQball' in Package `dti'

Description

The method estimates, in each voxel, the coefficients of an expansion of the apparent diffusion cefficient (ADC) with respect to a apherical harmonics orthonormal system from the DWI data contained in an object of class "dtiData".

Usage

## S3 method for class 'dtiData':
dwiQball(object, what="Qball", order=4, lambda=0)

Arguments

object
Object of class "dtiData"
what
Determines quantity to estimate, either coefficients ot the orientation density function (ODF) (what="Qball" or the apparent diffusion coefficient (ADC) (what="ADC") with respect to spherical harmonics of the up to the specifi
order
even integer: maximum order of the sperical harmonics expansion
lambda
nonnegative regularization parameter.

Value

  • An object of class "dwiQball".

References

M. Descoteaux, E. Angelino, S. Fitzgibbons and R. Deriche, Regularized, Fast and Robust Analytical Q-Ball Imaging, Magnetic Resonance Methods, 2007, 58, 497-512.

See Also

dtiData, readDWIdata, dtiIndices-methods, medinria, dtiData, dtiTensor

Examples

Run this code
demo(dti_art)

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