1. A method for generating a magnetic resonance (MR) image, comprising: using a processor to designate a scan sequence for operating an MR scanner to obtain acquired MR data from an examination region of an examination object while the examination object is situated in the MR scanner, said scan sequence comprising at least on scan parameter; in said processor, automatically determining a first value of said at least one scan parameter for a first subregion of the examination region, and determining a second value of said at least one scan parameter for a second subregion of the examination region; in said processor, determining each of said first value and said second value so as to cause a value of a physical variable, that is influenced by the first value and the second value of the at least one scan parameter, to adhere to a predetermined threshold value; using said processor to operate said MR scanner with said scan sequence with said first value of said at least one scan parameter in said first subregion and with said second value of said at least one scan parameter in said second subregion, to obtain said acquired MR data for the examination region; and in said processor, reconstructing an MR image of the examination region from the acquired MR data, and making the reconstructed MR image available in electronic form as a data file from said processor.