1. A method for operating a medical diagnostic apparatus comprising the steps of: in an examination, placing a region of an examination subject in an imaging volume of a magnetic resonance diagnostic apparatus and obtaining a first dataset of said region of interest by operating said magnetic resonance diagnostic apparatus with a first set of operating parameters, and storing said first set of operating parameters and said first dataset; in a follow-up examination, after said examination, again placing said region of interest in said imaging volume of said magnetic resonance diagnostic apparatus, and obtaining a follow-up dataset of said region of interest by operating said magnetic resonance diagnostic apparatus with the stored, first set of operating parameters, and storing said follow-up dataset; comparing said first dataset and said follow-up dataset with each other to identify a positional change of said region of interest with respect to said imaging volume between said examination and said follow-up examination; and adapting said stored, first set of operating parameters, dependent on said positional change, to obtain an adapted set of operating parameters, and obtaining a further follow-up dataset in said follow-up examination by operating said magnetic resonance diagnostic apparatus with said adapted set of operating parameters.