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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Contrast Media Mol Imaging. 2014 Jul;9(4):268–275. doi: 10.1002/cmmi.1569

Fig. 1.

Fig. 1

CEST MRI depends on the RF irradiation power level. a) Z-spectra and asymmetry curves simulated using Bloch-McConnell equations for three representative RF power levels of 1, 2 and 3 μT. b) The CEST ratio (CESTR) calculated with asymmetry analysis can be empirically described as a multiplication of the simplistic solution, the RF labeling coefficient, and the spillover factor.