Method for preparing an x-ray image, method for taking an x-ray image, device for data processing, computer program product, medium and x-ray machine

A method for preparing an X-ray image, which can be carried out by means of an X-ray machine comprising positioning unit, of at least one surface and/or volume area of a part of a head of at least one patient, comprising the steps:

• receiving and/or processing first data with respect to at least one area of a first anatomical structure of the head;
• calculating a first 3D structure of the area of the first anatomical structure on the basis of the first data;
• providing a 3D auxiliary structure which corresponds to a model of said positioning unit and of known alignment, orientation and/or position within a coordinate system assigned and/or assignable to the machine;
• aligning, positioning and/or arranging by means of said 3D auxiliary structure, the first 3D structure within said coordinate system assigned and/or assignable to the X-ray machine;
• receiving and/or processing third data;
• determining, by means of the third data, the surface and or volume area within the coordinate system, from which surface and/or volume area an X-ray image is to be taken:
• and
• determining, on the basis of at least the third data, at least one parameter for operating the X-ray machine.