vGRAPPA decomposition algorithm

This algorithm decomposes simultaneously acquired multi-voxel 
data to their respective origin regions. Based on the split-slice GRAPPA code by Steen Moeller, University of Minnesota, USA.

Author: L.T. Riemann (Physikalisch-Technische Bundesanstalt, PTB)
version 0.1
Date: 2021/05/08

Please cite as: L.T.Riemann, C.S.Aigner, R.Mekle, S.Schmitter, B.Ittermann, A.Fillmer; 
"Fourier-based decomposition approach for simultaneous acquisition of\""
"H spectra from two voxels in vivo at short echo times", Proc. Int. Soc. Magn. Reson. Med. 2021:0071


Recon_Spectro_MB.m is the program that executes the vGRAPPA algorithm

one has to insert the low SNR single-band data of both voxels as .dat file (SIEMENS raw data format)

also the multi-banded .dat data in the above mentioned program

Examplary phantom data can also be found in the repository

the vGRAPPA (based on split-slice GRAPPA) algorithm itself can be found in GRAPPA_MB2aa_asym_kernel_new_blocking.m