公开(公告)号：US10806420B2

公开(公告)日：2020-10-20

申请号：US16482702

申请日：2018-02-01

申请人： ESSPEN GmbH

发明人： Zahra Mohammadi

IPC分类号： A61B6/02 ,  A61B6/06 ,  A61B6/00 ,  H01J35/06 ,  H01J35/12 ,  H01J35/14

摘要： A computer tomograph (1) for mammographic x-ray imaging includes a MBFEX tube (20) and a flat-bed x-ray detector (30). Cathodes (40) are arranged in a fixed manner in rows in the MBFEX tube (20), the cathodes (40) being provided for the field emission of electrons. Geometry, radiation density and wavelength range of an x-ray beam (b) can be set. The MBFEX tube (20) is movable parallel (z) to the flat-bed x-ray detector (30). The flat bed x-ray detector (30) includes a moveable x-ray screen (31), the opening of which can be set. Using the x-ray screen (31), an imaging area (A) on the detector surface (D) of the flat-bed x-ray detector (30) can be selected and moved. Compared to conventional computer tomographs having rotating x-ray components, the computer tomograph (1) has a lighter and more compact design, with which a particularly small focal spot size is achieved.

公开(公告)号：US11771382B2

公开(公告)日：2023-10-03

申请号：US17761574

申请日：2020-09-19

申请人： ESSPEN GMBH

发明人： Zahra Mohammadi

IPC分类号： A61B6/03 ,  A61B6/00 ,  H01J35/30 ,  H01J35/14 ,  H01J35/06

CPC分类号： A61B6/035 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4021 ,  A61B6/4275 ,  H01J35/30 ,  A61B6/4488 ,  A61B6/542 ,  H01J35/064 ,  H01J35/153

摘要： A computer tomograph operates by rigidly arranged x-ray tubes, which are components of emitter-detector elements, which form an emitter-detector ring opened by relocating one emitter-detector element. Each x-ray tube includes a cathode emitting electrons, and an anode arrangement having an anode. Each cathode has an orientation angle relative to the geometrical center axis of the computer tomograph. A tangential plane on the focal spot of the anode has a surface normal, which includes an anode angle with the center axis. X-ray radiation emitted from the focal spot is directed in a center radiation angle to an x-ray detector axially offset relative to the x-ray tubes. The quotient from the sum of the orientation angle, radiation angle and anode angle is between two ninths and two. Each cathode, interacting with an electrode arrangement of the x-ray tubes, produces a focal spot on one of selectable positions on the anode arrangement.

公开(公告)号：US11490865B2

公开(公告)日：2022-11-08

申请号：US16649603

申请日：2018-09-21

申请人： ESSPEN GmbH

发明人： Zahra Mohammadi

IPC分类号： A61B6/02 ,  A61B6/00 ,  H01J35/06 ,  H01J35/24 ,  H01J35/26 ,  H05G1/70 ,  A61B6/03 ,  H05G1/58

摘要： A C-arm X-ray apparatus includes an x-ray emitter (5) and an X-ray detector (4) which are maintained on a C-arm (2) mounted on a reference plane. The x-ray emitter (5) has nanorods as electron emitters and has an elongated structure which is at least partially aligned along a surface normal of the reference plane.

公开(公告)号：US10849575B2

公开(公告)日：2020-12-01

申请号：US16349244

申请日：2017-11-13

申请人： ESSPEN GmbH

发明人： Zahra Mohammadi

IPC分类号： A61B6/00 ,  H01J35/12 ,  A61B6/03 ,  H01J35/06

摘要： A computer tomograph (1) for X-ray imaging includes a rotationally fixed gantry (2) that is displaceable at most in the axial direction (z). A plurality of X-ray emitters (3) and X-ray detectors (4) is arranged in the gantry (2) in a fixed manner about a central geometrical axis (z), in each case opposite to one another and offset with respect to each other in the direction of the central axis (z). The X-ray emitters (3) have cathodes (5) as electron emitters, which are separately connected to emitter controls (25) and cooperate with a common extraction grid (26) connected upstream of at least one focusing electrode (27). In comparison to conventional computer tomographs having rotating or rigidly arranged technical X-ray components, the computer tomograph (1) has a light and compact design.