It is an object of the invention to improve the information about the position of a structure of interest (e.g. one or more organs and possibly their surroundings, a therapeutic target and/or organs at risk). This object is achieved by a magnetic resonance imaging system configured for determining whether a structure of interest is within a predefined region of interest, wherein the magnetic resonance imaging system comprises—；a memory for storing computer program code means for causing the magnetic resoance system to carry out the following steps: —；applying a multiband magnetic resonance imaging sequence in order to simultaneously acquire a first slice of magnetic resonance data a first slice location and a second slice of magnetic resonance data from a second and different slice location, wherein the first and second slice location define the region of interest and； —；a determination step for determining based on the first and slice of magnetic resonance data and prior knowledge about the structure of interest and/or its surroundings whether the structure of interest is within the region of interest； wherein the magnetic resonance imaging system further comprises a processor for executing the computer program code means.
