Decompose an mrs_data object into white and gray matter spectra.

An implementation of the method published by Goryawala et al MRM 79(6) 2886-2895 (2018). "Spectral decomposition for resolving partial volume effects in MRSI".

spec_decomp(mrs_data, wm, gm, norm_fractions = TRUE)

Arguments

mrs_data

data to be decomposed into white and gray matter spectra.

wm

vector of white matter contributions to each voxel.

gm

vector of gray matter contributions to each voxel.

norm_fractions

option to normalise the wm, gm vectors for each voxel.

Value

a list of two mrs_data objects corresponding to the two tissue types.