A system configured to facilitate monitoring a position of a target volume that is being irradiated, including: a magnetic resonance scanner; a linear accelerator (LINAC) device; and a processor configured to execute computer-executable instructions stored in a memory, the instructions comprising: identifying a position of a linear accelerator (LINAC) radiation beam source around a target volume; identifying an imaging volume of interest defined at one face by a plane perpendicular to a radiation beam emitted by the LINAC source, the volume of interest comprising the target volume and any organ(s) at risk; assigning a first phase encoding direction parallel to the plane; assigning a second phase encoding direction parallel to the plane, the second phase encoding direction being perpendicular to the first; assigning a read-out direction that is parallel to the radiation beam; collecting fewer central region k-space data points in a central region of k-space than peripheral k-space data points when imaging the volume of interest; imaging the volume of interest and the target volume; determining a position of the target volume relative to the radiation beam; and controlling a collimator between the LINAC source and the volume of interest to maintain the radiation beam on the target volume and away from any OAR(s) based on the determined position of the target volume. a magnetic resonance scanner; a linear accelerator (LINAC) device; and a processor configured to execute computer-executable instructions stored in a memory, the instructions comprising: identifying a position of a linear accelerator (LINAC) radiation beam source around a target volume; identifying an imaging volume of interest defined at one face by a plane perpendicular to a radiation beam emitted by the LINAC source, the volume of interest comprising the target volume and any organ(s) at risk; assigning a first phase encoding direction parallel to the plane; assigning a second phase encoding direction parallel to the plane, the second phase encoding direction being perpendicular to the first; assigning a read-out direction that is parallel to the radiation beam; collecting fewer central region k-space data points in a central region of k-space than peripheral k-space data points when imaging the volume of interest; imaging the volume of interest and the target volume; determining a position of the target volume relative to the radiation beam; and controlling a collimator between the LINAC source and the volume of interest to maintain the radiation beam on the target volume and away from any OAR(s) based on the determined position of the target volume. identifying a position of a linear accelerator (LINAC) radiation beam source around a target volume; identifying an imaging volume of interest defined at one face by a plane perpendicular to a radiation beam emitted by the LINAC source, the volume of interest comprising the target volume and any organ(s) at risk; assigning a first phase encoding direction parallel to the plane; assigning a second phase encoding direction parallel to the plane, the second phase encoding direction being perpendicular to the first; assigning a read-out direction that is parallel to the radiation beam; collecting fewer central region k-space data points in a central region of k-space than peripheral k-space data points when imaging the volume of interest; imaging the volume of interest and the target volume; determining a position of the target volume relative to the radiation beam; and controlling a collimator between the LINAC source and the volume of interest to maintain the radiation beam on the target volume and away from any OAR(s) based on the determined position of the target volume.