1. A method for determining imaging parameters for acquiring data from an examination subject for reconstructing a magnetic resonance image of the examination subject from the data, comprising the steps of: establishing initial imaging parameters for acquiring magnetic resonance data from an examination subject; calculating, using said initial imaging parameters, signal intensities for tissue that exist in at least a portion of the examination subject; and adapting said imaging parameters dependent on the calculated signal intensities, for subsequent acquisition of said magnetic resonance data from the examination subject.