X-ray diagnostic device for mammography examinations

Abstract

An X-ray diagnostics device for mammography examinations has an arm for an X-ray tube and a subject table as well as a compression plate arranged between the X-ray tube and the subject table, the compression plate being connected to the arm and being displaceable along it. The arm can be rotated around a horizontal shaft and is height-adjustable along a longitudinal axis of a stand. The arm is rotatable with a first displacement arrangement around the horizontal shaft, and the shaft is secured to a mount that is laterally displaceable with a second displacement arrangement. As a result the arm is laterally displaceable. The mount is displaceably attached to a lifting arrangement connected to the stand, the lifting arrangement is height-adjustable with a third displacement arrangement. A control device operates using a control program that accepts output signals of position sensors that indicate the height and lateral positions of the arm as well as from a synchro system that indicates the rotational angle of the arm, to control the second and third displacement arrangements for the displacement of the arm laterally and in height as well as the first displacement arrangement for the rotation of the arm such that a rotation of the arm around an axis that can be arbitrarily selected along the longitudinal axis of the stand is enabled. Thus the arm can be rotated around an isocenter adapted to the patient from one exposure position into another exposure position with the desired rotational angle, with the patient remaining in position regardless of the breast size.

Dependencies are inferred from the claim text.