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LB-QUESP, EH-QUESP, and HW-QUESP analyses of 178 mM iopromide with a saturation time of 6 seconds. a) LB-QUESP, b) EH-QUESP, and c) HW-QUESP analyses of CEST at 4.2 ppm estimated the kex for the slowly exchanging amide proton. d) LB-QUESP, e) EH-QUESP, and f) HW-QUESP analyses of CEST at 5.6 ppm estimated kex for the rapidly exchanging amide proton. The boundary estimates are shown as gray lines.
