Fig. 4.

Real part of the aligned and summed ¹H spectra from all VOI voxels (thin black lines) representing Eq. [3], for each of the animals pre- (left) and 4 (animals 4 and 5) or 6 (animals 1-3) weeks post-SIV-infection (right), superimposed with their fitted model functions (thick gray lines), on common intensity and chemical shift scales. Animals 1 and 2 are female; 3 – 5 male. Note the excellent SNRs (reflected by CRLBs of less than 2% for the four metabolites) and spectral resolution compared with individual voxels .