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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Neuroimage. 2013 Apr 22;78:385–395. doi: 10.1016/j.neuroimage.2013.04.045

Fig. 8. R1ρ dispersions of concentration-dependent amine and hydroxyl metabolite phantoms.

Fig. 8

Three amine-containing glutamate concentrations in agarose with 0.07 mM MnCl2 (A), and four hydroxyl-containing glucose (Glc) concentrations in PBS with 0.1 mM MnCl2 (B) were used. R1ρ is linearly dependent on Glu and Glc concentration, and the slope for ω1 = 500 Hz is only slightly larger than that for ω1 = 2000 Hz for Glu, but is much larger for Glc (C). The ratio of R1ρ at ω1 = 500 Hz to 2000 Hz is similar for glucose phantom (2.8) and for in vivo functional response (2.7).