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. Author manuscript; available in PMC: 2015 Aug 21.
Published in final edited form as: Phys Med Biol. 2014 Jul 23;59(16):4493–4504. doi: 10.1088/0031-9155/59/16/4493

Fig. 2.

Fig. 2

Iopamidol ratiometric pH MRI. a) Z-spectra for representative pH of 6, 7 and 8 (B1 =2.5 μT, TS =5s) at room temperature. b) CEST ratio (CESTR) calculated from the asymmetry analysis as a function of pH. CESTR at 4.3 ppm peaks at pH 7.5 while CESTR of 5.5 ppm peaks at pH 7. c) Ratiometric CEST analysis is sensitive to pH ranging from 6 to 7.5.