A medical system comprising: - a memory storing machine executable instructions ; - a computational system , wherein execution of the machine executable instructions causes the computational system to: - receive initial pulse sequence commands , wherein the initial pulse sequence commands are configured for controlling a magnetic resonance imaging system to acquire k-space data following a non-Cartesian k-space sampling pattern , wherein the initial pulse sequence commands are configured for controlling the magnetic resonance imaging system to sample the non-Cartesian k-space sampling pattern by repeatedly sampling a Cartesian k-space sampling pattern that is rotated for each acquisition, wherein the non-Cartesian k-space sampling pattern has an effective water-fat shift direction being representative for the direction in which the water-fat shift occurs; characterized in that execution of the machine executable instructions further causes the computational system to: - receive a chosen water-fat shift direction ; and - construct modified pulse sequence commands by rotating the non-Cartesian k-space sampling pattern such that the effective water-fat shift direction is aligned with the water-fat shift direction. - a memory storing machine executable instructions ; - a computational system , wherein execution of the machine executable instructions causes the computational system to: - receive initial pulse sequence commands , wherein the initial pulse sequence commands are configured for controlling a magnetic resonance imaging system to acquire k-space data following a non-Cartesian k-space sampling pattern , wherein the initial pulse sequence commands are configured for controlling the magnetic resonance imaging system to sample the non-Cartesian k-space sampling pattern by repeatedly sampling a Cartesian k-space sampling pattern that is rotated for each acquisition, wherein the non-Cartesian k-space sampling pattern has an effective water-fat shift direction being representative for the direction in which the water-fat shift occurs; characterized in that execution of the machine executable instructions further causes the computational system to: - receive a chosen water-fat shift direction ; and - construct modified pulse sequence commands by rotating the non-Cartesian k-space sampling pattern such that the effective water-fat shift direction is aligned with the water-fat shift direction. - receive initial pulse sequence commands , wherein the initial pulse sequence commands are configured for controlling a magnetic resonance imaging system to acquire k-space data following a non-Cartesian k-space sampling pattern , wherein the initial pulse sequence commands are configured for controlling the magnetic resonance imaging system to sample the non-Cartesian k-space sampling pattern by repeatedly sampling a Cartesian k-space sampling pattern that is rotated for each acquisition, wherein the non-Cartesian k-space sampling pattern has an effective water-fat shift direction being representative for the direction in which the water-fat shift occurs; - receive a chosen water-fat shift direction ; and - construct modified pulse sequence commands by rotating the non-Cartesian k-space sampling pattern such that the effective water-fat shift direction is aligned with the water-fat shift direction. <EOS>