1. A method for acquiring MR image data pertaining to a coronary artery which is in motion between end-diastolic and end-systolic maximum excursion positions, respectively, during a cardiac cycle, said method comprising the steps of: measuring the displacement between said maximum excursion positions; generating a function from said measured displacement which represents the motion of said artery during said cardiac cycle; employing said artery motion function to predict the location of said coronary artery, in a region lying between said maximum excursion positions, at each of a plurality of acquisition times; and acquiring MR data at a scan plane as said scan plane is adjusted during said cardiac cycle to different locations in said region, each of said scan plane locations being associated with one of said acquisition times, the scan plane location associated with a specific acquisition time being selected to coincide with the location of said coronary artery which is predicted by said artery motion function for said specific acquisition time.