Patent ID: 7885379

Claim:
A positioning device for relative positioning of a radiation source and an object holder of a mammography device, the positioning device comprising: a device support section that accommodates the radiation source, an object support section that accommodates the object holder, the object support section being connectable and/or connected to the mammography device by a connecting element, wherein the device support section is mounted such as to be able to rotate relative to the connecting element and to the object support section, wherein the device support section includes a device arm, the device arm comprising: a free end that holds the radiation source, and a hinged end comprising a first annular body and a through opening wherein, the connecting element protrudes through the opening, the opening surrounds the connecting element, or the connecting element protrudes through the opening and the opening surrounds the connecting element, and wherein the object support section includes a second annular body forming a cover section covering the first annular body, the first annular body and the second annular body being arranged congruent so that the circumferential surfaces of the first annular body and the second annular body are flush with each other, independent of the rotational position of the device support section with respect to the object support section.