1. A method for controlling at least one of acquisition and evaluation of image data in medical examinations, comprising: providing a statistical model to a computer of a target volume of a subject based on data representing real anatomy; providing a previously-acquired planning image data set to the computer at least partially showing said target volume; in said computer, automatically determining special information of said target volume using said statistical model; and controlling at least one of acquisition and evaluation of image data in a medical examination using said special information.