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Simulated effect of respiration on the measurement of kfCK. a The ratio of γ-ATP transverse magnetisation in the presence of steady-state saturation (with respiration induced B0 variation) versus the same sequence with no steady-state saturation. b The residual γ-ATP peak SNR. c The ratio of measured kfCK to true (simulation) kfCK. True kfCK = 0.30 s-1. d Measured kfCK in the presence of respiration induced B0 variation at different values of true kfCK.
