Apparatus for mammography and/or tomosynthesis with device for removing diffuse radiation

摘要

An apparatus for tomosynthesis and/or mammography includes: an X-ray detector, for receiving and detecting X-rays in a first, detection plane; an X-ray source, which can be activated individually and is positioned to emit a corresponding X-ray beam towards the first, detection plane; a processing and control unit, for activating the X-ray source and receiving a signal relating to X-rays which passed through the breast and were detected by the detector to derive a radiographic image representative of the internal structure of the breast; a grille for removing diffuse radiation, interposed between the source and the detector to receive X-rays which passed through the breast. The grille including plates positioned opposite the chest of the patient when the breast is positioned in a positioning region, and which are angled to converge towards the same region proximal to the X-ray source.

主权项

1. An apparatus for performing at least one chosen from tomosynthesis and mammography of a breast of a patient, comprising:
an X-ray detector device, designed to receive and detect X-rays in a first, detection plane, the X-ray detector device comprising a plurality of pixels; an X-ray source, which can be activated individually and which is positioned to emit a corresponding beam of X-ray towards the first, detection plane; a region for positioning the breast in such a way that the breast intercepts the beam from the X-ray source; a processing and control unit, connected to the X-ray source for activating the X-ray source and connected to the X-ray detector device for receiving a signal relating to the X-rays which pass through the breast and are detected by the X-ray detector device, the unit being constructed and arranged to derive from the signal, a radiographic image representative of an internal structure of the breast of the patient; a grille for removing diffuse radiation, the grille being interposed between the positioning region and the X-ray detector device so that the X-rays which pass through the breast pass through the grille, the grille comprising a plurality of plates which are positioned opposite a chest of the patient when the breast is positioned in the positioning region, the plates being angled to converge towards a region proximal to the X-ray source, the grill also comprising, in a direction which is substantially at a right angle to a direction of extension of the plates, a number of plates per centimeter which is greater than half of a number of the pixels of the X-ray detector device per centimeter in the direction which is substantially at a right angle to the direction of extension of the plates; wherein the X-ray source can move with respect to the X-ray detector device in a second plane and wherein the plates extend in a direction of extension substantially parallel with the second plane; wherein an angle of orientation of the plates increases with a distance of the plates from the second plane.