1. A method for controlling at least one of acquisition and evaluation of image data in medical examinations, comprising: providing, to a computer, a statistical model that is statistical representation based on data representing real anatomy that corresponds to anatomy to be examined that is located in a target volume of a subject; providing, to said computer, a previously-acquired planning image data set to the computer at least partially showing said target volume in said subject; in said computer, automatically determining spatial information of said target volume in the subject using said statistical model; in said computer, automatically generating, from said spatial information, at least one control command signal embodying said spatial information in a form configured to operate am apparatus selected from the group consisting of a medical image data acquisition apparatus and a medical image data evaluation apparatus, and supplying said at least some control command signal to said apparatus and with said apparatus and with said at least one control command signal, controlling said apparatus to acquire or evaluate image data in a medical examination according to said special information embodied in said control command signal.