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Renal CEST-MRI following iobitridol i.v. injection (1.5 g I/kg b.w.). (a) T2w renal MRI. CEST ST difference map between pre-/post-injection at 1.5 μT (b) and 6 μT (c). (d) The pH map determined from RF power-based ratiometric pH imaging. Only kidney signal displayed in color on grayscale image to highlight effects.
