[Tuebingen positioning device for defilé-X-rays of the patella (author's transl)]

A positioning device for Defilé-X-rays of the patella ist presented which, in contrast to other constructions (separately suspended above the X-ray table), is mounted at the end of the X-ray table and permits fast, exact work. The X-ray technique corresponds with the procedure of Merchant. Details of this practical X-ray technique are discussed in comparison to the other developments presented recently.