A method of operating a magnetic resonance imaging system, the magnetic resonance imaging system being configured for acquiring magnetic resonance images of a set of slices from at least a portion of a subject of interest over at least one breathing cycle of the subject of interest, and the magnetic resonance imaging system being connectable to a respiration monitoring means which is configured to provide an output signal whose level represents a respiration state of the subject of interest, the method comprising: - a step of providing a prospective acquisition scheme for acquiring within the at least one breathing cycle at least one magnetic resonance image of each slice of the set of slices at each respiration state of a set of selected respiration states of the subject of interest, the triggering on the selected respiration states being based on predetermined threshold output signal levels of the respiration monitoring means, - a step of commencing magnetic resonance image acquisition pursuant to the provided prospective acquisition scheme, - during executing magnetic resonance image acquisition pursuant to the prospective acquisition scheme, a step of comparing actual respiration states at which magnetic resonance images were actually acquired, with the selected respiration states according to the prospective acquisition scheme and predetermined ranges of tolerance of the selected respiration states, - a step of modifying the prospective acquisition scheme, if one of the actual respiration states lies outside the predetermined range of tolerance of the selected respiration state, and - a step of proceeding execution of magnetic resonance imaging acquisition pursuant to the modified prospective acquisition scheme - a step of comparing a time course of an output signal representing a breathing cycle for which all the magnetic resonance images scheduled in the prospective acquisition scheme have been acquired, with a predetermined standard output signal time course representing a standard breathing cycle and having predetermined standard output signal ranges of tolerance, and - a step of modifying the prospective acquisition scheme if the time course of the output signal representing the breathing cycle for which all the magnetic resonance images scheduled in the prospective acquisition scheme have been acquired at least partially lies outside the predetermined ranges of tolerance of the predetermined standard output signal time course. - a step of providing a prospective acquisition scheme for acquiring within the at least one breathing cycle at least one magnetic resonance image of each slice of the set of slices at each respiration state of a set of selected respiration states of the subject of interest, the triggering on the selected respiration states being based on predetermined threshold output signal levels of the respiration monitoring means, - a step of commencing magnetic resonance image acquisition pursuant to the provided prospective acquisition scheme, - during executing magnetic resonance image acquisition pursuant to the prospective acquisition scheme, a step of comparing actual respiration states at which magnetic resonance images were actually acquired, with the selected respiration states according to the prospective acquisition scheme and predetermined ranges of tolerance of the selected respiration states, - a step of modifying the prospective acquisition scheme, if one of the actual respiration states lies outside the predetermined range of tolerance of the selected respiration state, and - a step of proceeding execution of magnetic resonance imaging acquisition pursuant to the modified prospective acquisition scheme - a step of comparing a time course of an output signal representing a breathing cycle for which all the magnetic resonance images scheduled in the prospective acquisition scheme have been acquired, with a predetermined standard output signal time course representing a standard breathing cycle and having predetermined standard output signal ranges of tolerance, and - a step of modifying the prospective acquisition scheme if the time course of the output signal representing the breathing cycle for which all the magnetic resonance images scheduled in the prospective acquisition scheme have been acquired at least partially lies outside the predetermined ranges of tolerance of the predetermined standard output signal time course.