-
公开(公告)号：EP3528274A1
公开(公告)日：2019-08-21
申请号：EP18157305.6
申请日：2018-02-19
发明人： STEADMAN, Roger , VOGTMEIER, Gereon
摘要： An X-ray source (10) for emitting an X-ray beam (101) is proposed. The X-ray source (10) comprises an anode (12) and an emitter arrangement (14) comprising a cathode (16) for emitting an electron beam (15) towards the anode (12) and an electron optics (18) for focusing the electron beam (15) at a focal spot (20) on the anode (12). The X-ray source (10) further comprises a controller (22) configured to determine a switching action of the emitter arrangement (14) and to actuate the emitter arrangement (14) to perform the switching action, the switching action being associated with a change of at least one of a position of the focal spot (20) on the anode (12), a size of the focal spot (20), and a shape of the focal spot (20). The controller (22) is further configured to predict before the switching action is performed, based on the determined switching action, the size and the shape of the focal spot (20) expected after the switching action.
-
公开(公告)号：EP2727441B1
公开(公告)日：2015-01-14
申请号：EP12740221.2
申请日：2012-06-25
发明人： IGNEY, Jens , STEINER, Reinhard
IPC分类号： H05G1/56
CPC分类号： H05G1/56 , A61B6/40 , H03K17/691 , H05G1/10
-
公开(公告)号：EP2727441A1
公开(公告)日：2014-05-07
申请号：EP12740221.2
申请日：2012-06-25
发明人： IGNEY, Jens , STEINER, Reinhard
IPC分类号： H05G1/56
CPC分类号： H05G1/56 , A61B6/40 , H03K17/691 , H05G1/10
摘要： The present invention relates to signal and power supply transmission for an X-ray source. In order to provided an improved signal and power supply transmission with reduced constructional complexity and enhanced operation possibilities, an integrated signal and power supply transmission arrangement is provided, comprising a supply board (12), a main board (14), an insulating plate (16), at least one transformer arrangement (18), and at least one signal transmission arrangement (20). The insulating plate is provided between the supply and the main board. The transformer arrangement is provided to supply electric energy to the driving circuit of a transistor, which in turn feeds an X-ray source. The transformer arrangement comprises a primary electric conductor arranged on the supply board to cause electromagnetic induction in a secondary electric conductor arranged on the main board. The signal transmission arrangement is adapted to transmit a signal between the supply board and the main board; wherein the signal transmission arrangement comprises at least a first optical signal transmission device provided on the supply board, and a second optical signal transmission device (30) provided on the main board. The insulating plate is light-transmissive at least in the part between the first and second optical signal transmission device. The first and the second optical signal transmission devices are arranged in an optical connection path.
-
公开(公告)号：EP1738621A4
公开(公告)日：2008-10-29
申请号：EP05730769
申请日：2005-03-16
申请人： VARIAN MED SYS INC
发明人： GRAY KEITH
CPC分类号： H04N5/32 , A61B6/4233 , H04L7/04
摘要： Systems and methods of switching between data acquisition modes in an x-ray system are disclosed. The x-ray system includes a control device and a detector device, the detector device including one or more x-ray sensors. During changes in acquisition modes, responsibility for flushing the one or more x-ray sensors may be transferred from the control device to the detector device. When the detector device is ready to begin acquiring data in a new data acquisition mode, the responsibility is transferred back from the detector device to the control device.
-
公开(公告)号：EP1774837A1
公开(公告)日：2007-04-18
申请号：EP05761675.7
申请日：2005-07-05
摘要： An active dose radiation device and method decreases the amount of x-rays which may be generated by an x-ray tube following termination of the x-ray exposure. One component of the x-ray system is connected to the device which has a plurality of electronic cells that can be overvoltaged from a first state, where they are less conductive, to a second state, where they are highly conductive. A voltage pulse generator overvoltages a first cell in the plurality of cells at termination of an x-ray exposure. Overvoltaging the first cell causes a cascading effect which eventually overvoltages all of the cells and changes the state of the cells from the first less conductive state to the second highly conductive state. In the second highly conductive state, the cells can conduct current from at least one component of the x-ray system to ground thereby reducing x-rays generated by the x-ray tube and reducing the x-ray dosage from the imaging system after the x-ray exposure has been completed. The plurality of cells automatically reverts to the first state once current passing through the cells decreases below a threshold current level. The plurality of cells are connected to only the anode side 26 or the cathode side 38 of the x-ray imaging device in order to discharge energy from only one side to ground which results in a sufficient decrease in the voltage across the x-ray tube to prevent generation of active dosage of x-rays which may penetrate the patient.
-
公开(公告)号：EP0972430A4
公开(公告)日：2000-01-19
申请号：EP96943679
申请日：1996-12-13
申请人： MILES DALE A
发明人： MILES DALE A
IPC分类号： H05G1/00 , A61B6/00 , A61B6/14 , H05G1/06 , H05G1/08 , H05G1/10 , H05G1/26 , H05G1/42 , H05G1/52 , H05G1/02 , H05G1/56
CPC分类号： A61B6/145 , A61B6/4405 , A61B6/4488 , A61B6/508 , A61B6/548 , H05G1/06 , H05G1/08 , H05G1/10 , H05G1/26 , H05G1/42 , H05G1/52
摘要： A portable and preferably hand-held X-ray generator (10) for use in intraoral and other X-ray applications, and a new process of dental image acquisition which utilizes a novel receptor holder (24) physically linked to the lightweight, portable generator (10), and a unique, articulating arm (104) and cradle (108) which allows one generator (10) to be used in multiple operatories. The system's generator has a reduced X-ray output and much smaller focal spot area than conventional dental X-ray generators, which reduces the X-ray output and the overall patient X-ray burden. The smaller focal spot also allows for improved resolution in the final image.
摘要翻译： 一种用于口内和其它X射线应用的便携式和优选手持式X射线发生器（10），以及一种利用与轻型便携式发生器物理连接的新型接收器保持器（24）的牙科图像获取新方法 （10）以及允许一个发生器（10）在多个操作室中使用的独特的铰接臂（104）和支架（108）。 与传统的牙科X射线发生器相比，该系统的发生器具有减少的X射线输出和小得多的焦斑面积，这减少了X射线输出和整个病人的X射线负担。 较小的焦点还可以提高最终图像的分辨率。
-
-
公开(公告)号：EP0253417A3
公开(公告)日：1989-07-26
申请号：EP87201167.1
申请日：1987-06-17
摘要： Bei Röntgengeneratoren, die zur Erzeugung der Hochspannung für eine Röntgenröhre einen Wechselrichter enthalten, können sich bei Serienbetrieb mit fester Aufnahmezeit infolge von Versorgungsspannungs- oder Objektabsorptionsänderungen starke Änderungen der Dosis von Aufnahme zu Aufnahme bei einer Aufnahmeserie ergeben. Diese Dosisschwankungen sind um so ausgeprägter, je kürzer die Aufnahmezeit ist und je geringer die Wechselrichterfrequenz ist. Nach der Erfindung können diese Änderungen dadurch reduziert werden, daß die Aufnahmen einer Serie jeweils nach der gleichen Zahl von Wechselrichterschwingungen beendet werden, wenn die Abweichung zwischen dem Istwert und dem Sollwert der Dosis bzw. der Dosisleistung einen vorgegebenen Wert unterschreitet. Zur Verringerung von Regelabweichungen wird dabei vorzugsweise nur die Röhrenspannung geändert.
-
公开(公告)号：EP0052269A1
公开(公告)日：1982-05-26
申请号：EP81109054.7
申请日：1981-10-28
摘要： X-ray pulses at two different photon energy levels are produced with an x-ray tube (62) that has an adjustable resistor element (74,75), in a circuit that connects the anode (64) and filament (65) of the tube to a high voltage supply (60,61). Two bias voltage supplies (81,82) are connected in additive fashion between a control grid element (66) of the tube and its filament (65) to enable control of voltage drop and current through the tube (62). Switch means (87,97) are provided to selectively shunt either or both bias voltage , supplies (81,82) in a repeatable order to thereby alter the bias voltage on the control grid (66) and enable producing x-ray pulses having energies corresponding with the voltage drop and current through the tube at a selected bias voltage in accordance with the load line on the anode characteristic curve plot of the tube as determined by the value of the adjustable resistor element (74,75).
-
公开(公告)号：EP4422355A2
公开(公告)日：2024-08-28
申请号：EP24181890.5
申请日：2018-03-29
发明人： UCHIYAMA, Akehiko
IPC分类号： H05G1/56
摘要： A radiation imaging apparatus comprising a detection unit arranged to detect radiation from an irradiation unit arranged to irradiate with the radiation; a reception unit configured to receive, from an external apparatus, irradiation information about an irradiation time at which irradiation of the radiation is to be started; a control unit configured to control the detection unit so that the detection unit is ready to detect the radiation at the irradiation time, based on the irradiation information; and a transmission unit configured to transmit photographing permission information, which indicates that the detection unit is ready to detect the radiation at the irradiation time, to the external apparatus if the detection unit is expected to be ready to detect the radiation at the irradiation time.
-
-
-
-
-
-
-
-
-
搜索结果
58 条记录 (耗时 0.013 秒)
