1. A magnetic resonance imaging method, the method comprising the steps of performing a first MR scan of a structure of interest for detecting the arrival of a contrast bolus in the structure of interest, the first MR scan using a first resonance frequency corresponding to first MR sensitive nuclei, repeating the first performing step at least until the bolus arrival in the structure of interest has been detected, performing a second MR scan of the structure of interest for acquiring a MR image, the second MR scan using a second resonance frequency corresponding to second MR sensitive nuclei, the second nuclei being different from the first nuclei.