Positioning of a mobile x-ray detector

An x-ray device, comprising:

• an x-ray emitter;
• a mobile x-ray detector;
• and
• a positioning device being connectable to said mobile x-ray detector, said positioning device containing:
• at least one device selected from the group consisting of at least one marker and at least one sensor for determining a position of said positioning device;
• and
• a number of connection elements for establishing a mechanical connection between said positioning device and said mobile x-ray detector.

A method for mutually aligning a mobile x-ray detector and an x-ray emitter in relation to one another, which comprises the following steps of:

• connecting the mobile x-ray detector to a positioning device with an aid of a number of connection elements of the positioning device;
• determining a position of the mobile x-ray detector;
• providing position data with an aid of the positioning device;
• and
• aligning the mobile x-ray detector in relation to the x-ray emitter, and/or vice versa, using the position data.