In a method for determination of coronal and sagittal planes for the subsequent acquisition of new magnetic resonance slice images or the representation of magnetic resonance slice images from an existing image data set of a shoulder joint starting from a data set representing a transversal slice image of a shoulder joint, the slice image is analyzed using at least one analysis algorithm to determine the shoulder blade and for two points lying on the shoulder blade that define the coronal plane. The slice image also is analyzed using at least one analysis algorithm to identify the shoulder blade and the half-moon-shaped arc of the joint connection between the had of the upper extremity of the humerus and the shoulder blade, and two points on the arc in the region of the joint connection with the shoulder blade that define the sagittal plane. A coronal slice image or a sagittal slice is then acquired or represented at the display dependent on the orientation of the identified planes.