1. A method for correcting MRI image distortion, in which a distortion correction procedure is carried out on an acquired MRI image data set of a body region by graphical data processing, comprising: determining the distortion the acquired MRI image data set, comprising both bony structure and soft tissue as a single image dataset, by carrying out an image registration process for registering the acquired MRI image data set to a previously available, less distorted or undistorted image data set of substantially the same body region, the registration process comprising a multitude of single registrations of structures within the body region that are performed based on a hierarchy, wherein bony structures shown in the MRI image data set are registered to the previously available less distorted or undistorted image data set first, whereupon soft tissue shown in the MRI image data set are registered to the previously available less distorted or undistorted image data set after the registration of the bony structures; determining a transformation from the image registration process; and correcting the distortion by applying the transformation to the acquired MRI image data set.