Figure 5a:

Comparative metabolite and ratio maps from (a) brain tumor (NAA, creatine [Cr], choline [Cho]) and (b) prostate cancer (citrate [Cit], creatine, choline) MR spectroscopic imaging data sets for the acceleration factors of one (1X), two (2X), five (5X), and 10 (10X). Ratio maps depict choline-to-NAA index (CNI) for the brain tumor data and (choline + creatine)/citrate for the prostate cancer data. Top: Yellow box on anatomic MR images indicate the MR spectroscopic imaging region of interest depicted on the maps. a.u. = arbitrary unit.