The invention relates to a method for generating MR images (10 20) of an object in its environment within a region of interest said object executing motion comprising a plurality of moving phases within a period of time. According to several aspects of the invention the method comprises the steps of: providing a first dataset pertaining to one of the moving phases of the object (Si) generating a first image (10) of a region of interest from the first dataset (S2) identifying a dynamic region (12) and a static region (14) inside the first image (10) wherein the regions (12 14) are predominantly dynamic or static respectively within the periodeperiod of time (S3) editing the first image (10) by masking out the dynamic region (14) (S4) performing an inverse Fourier transformation of the edited first image (16) showing the remaining static region (14) (S5) providing a second dataset pertaining to one of the moving phases of the object (S6) subtraction of the inverse Fourier transformation of the edited first image (16) with the remaining static region (14) from the second dataset (S7) performing a Fourier transformation on the subtracted second dataset (18) (S8) and generating a second image (20) of a reduced region of interest with respect to the region of interest of the first image (10) which reduced region of interest includes the dynamic region (12) (S9). The invention further relates to a corresponding MRI system for generating MR images of an object in its environment within a region of interest.
