R/amp_scaling.R
scale_amp_molal_pvc.Rd
Details of this method can be found in "Use of tissue water as a concentration reference for proton spectroscopic imaging" by Gasparovic et al MRM 2006 55(6):1219-26. 1.5 Tesla relaxation assumptions are taken from this paper. For 3 Tesla data, relaxation assumptions are taken from "NMR relaxation times in the human brain at 3.0 Tesla" by Wansapura et al J Magn Reson Imaging 1999 9(4):531-8.
scale_amp_molal_pvc(fit_result, ref_data, p_vols, te, tr, ...)
result object generated from fitting.
water reference MRS data object.
a numeric vector of partial volumes expressed as percentages. For example, a voxel containing 100% white matter tissue would use : p_vols = c(WM = 100, GM = 0, CSF = 0).
the MRS TE in seconds.
the MRS TR in seconds.
additional arguments to get_td_amp function.
A fit_result
object with a rescaled results table.