phase_correction_fids.m

function out = phase_correction_fids(data, water_data)

% Written and updated by MGSaleh, University of Cape Town & The Johns Hopkins University School of Medicine, 2016.
% The function subtracts the phase of the unsuppressed (water_data) data
% from the phase of the suppressed data.

Kphase=unwrap(angle(water_data(1,:)));
sz_mat=size(data);
fids=zeros(sz_mat);

% figure,plot(real(fftshift(fft(data.'))))
% xlim([1100 1400])
% title('Before eddy current correction')

for kk=1:sz_mat(1)
    K_data=abs(data(kk,:));
    Kphase_data=unwrap(angle(data(kk,:)));
    Kphase_corr=(Kphase_data)-Kphase;
    fids(kk,:)=K_data.* exp(1i*Kphase_corr);
end

% figure,plot(real(fftshift(fft(fids.'))))
% xlim([1100 1400])
% title('After eddy current correction')

out = fids;