公开(公告)号：US2113696A

公开(公告)日：1938-04-12

申请号：US58969632

申请日：1932-01-29

申请人： PHILIPS NV

发明人： ALFRED KUNTKE

IPC分类号： H05G1/24 ,  H05G1/58

CPC分类号： H05G1/24 ,  H05G1/58

摘要： 376,199. R÷ntgen-ray apparatus ; spark-gap apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Feb. 9, 1932, No. 3846. Convention date, Feb. 14, 1931. [Classes 39 (i) and 40 (v).] In installations comprising a condenser discharged through an X-ray tube to produce a short exposure, one of the two operations of switching off the charging current of the condenser and causing the discharge through the tube is accompanied by the other, feeding of the tube from the charging circuit after the discharge being thus avoided. The condenser 1, Fig. 1, may be charged through a resistance 11, a transformer 2 and a rectifier 3 and discharged through an inductance 12 and the X- ray tube 7. A switch 10 in its upper position supplies heating current to the cathode of the rectifier 3 to charge the condenser and in its lower position breaks this supply to stop the charging and supplies the cathode of the tube 7 to produce the discharge. In modifications, an electromagnetic or thermal relay controls the discharge circuit. The exciting coil of the relay may be in parallel to or in series with the cathode of the rectifier 3, or the switch 10 in its lower position may energize the relay. In Fig. 4, closure of a switch 20 heats the cathode of the rectifier 3 and energizes a coil 15. When the switch 20 is opened, a pin 15 in the coil 15 drops and reduces the gap between ball or other electrodes 18, 19 to allow the condenser 1 to discharge through the tube 7. A time-lag relay 21 opens the heating circuit of the tube 7 after the discharge. The switch 20 may control only the transformer 16, the relay 21 being omitted and the cathode of the tube 7 continuously supplied with current. The extinction of the glow in a discharge tube 23 across a resistance 22 in the charging circuit may be used to indicate that the condenser 1 is sufficiently charged. Lighting of the tube 23 due to the alternating current flowing in the circuit on account of the capacity of the rectifier 3 may be prevented by a condenser 24 across the tube 23.

公开(公告)号：US1961705A

公开(公告)日：1934-06-05

申请号：US29441128

申请日：1928-07-21

申请人： WAPPLER ELECTRIC COMPANY INC

发明人： ARTHUR MUTSCHELLER

IPC分类号： H05G1/58

CPC分类号： H05G1/58

公开(公告)号：US12120806B2

公开(公告)日：2024-10-15

申请号：US15797429

申请日：2017-10-30

申请人： Medtronic Navigation, Inc.

发明人： Patrick A. Helm ,  Shuanghe Shi

IPC分类号： H05G1/58 ,  A61B6/00 ,  A61B6/03

CPC分类号： H05G1/58 ,  A61B6/03 ,  A61B6/481 ,  A61B6/482 ,  A61B6/487 ,  A61B6/542

摘要： A method and system is disclosed for acquiring image data of a subject. The image data can be collected with an imaging system with at least two different power characteristics. A volumetric model of multiple phases can be reconstructed using dynamic or enhanced reconstruction techniques.

公开(公告)号：US11770889B2

公开(公告)日：2023-09-26

申请号：US17795038

申请日：2021-09-10

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Bernhard Gleich

IPC分类号： H05G1/58

CPC分类号： H05G1/58

摘要： The present invention relates to a system and a method for high-voltage switching for a computed tomography apparatus. The system comprises an oscillating circuit with a non-linear inductor and a capacitor. The inductor and the capacitor are connected in series, and the capacitor is connected to a high-voltage line of a high-voltage power supply. The inductor comprises an inductance that decreases with increasing current through the inductor, such that the inductance of the inductor significantly chances during a resonant operation of the oscillating circuit, thereby providing essentially a square voltage applied to the capacitor. The square voltage modulates the high-voltage of the high-voltage generator thus switching high-voltage levels applied to an electrode of a computed tomography system.

公开(公告)号：US11673004B2

公开(公告)日：2023-06-13

申请号：US17665596

申请日：2022-02-07

申请人： SIEMENS HEALTHINEERS INTERNATIONAL AG

发明人： Reto Filiberti

IPC分类号： A61N5/10 ,  H01H13/02 ,  H01H9/16 ,  H01H13/70 ,  A61B6/00 ,  H05G1/58 ,  H05G1/56 ,  A61B17/00 ,  H03K17/18 ,  H03K17/96 ,  A61B6/04 ,  H03K17/955

CPC分类号： A61N5/1048 ,  A61B6/461 ,  A61B6/467 ,  H01H9/161 ,  H01H13/023 ,  H01H13/70 ,  H05G1/56 ,  H05G1/58 ,  A61B6/0487 ,  A61B2017/00017 ,  A61B2017/00199 ,  A61N2005/1074 ,  H01H2013/026 ,  H01H2239/006 ,  H01H2239/064 ,  H01H2300/014 ,  H01H2300/038 ,  H01H2300/04 ,  H03K17/18 ,  H03K17/955 ,  H03K17/96 ,  H03K17/962

摘要： A radiation therapy system includes an X-ray imaging system that is configured with a combined and simplified filter and collimator positioning mechanism. In addition, an X-ray imager of the RT system is only positioned at a few discrete locations within a plane that is a fixed distance from the imaging X-ray source when generating X-ray images. As a result, for each of these discrete imaging positions, the simplified filter and collimator positioning mechanism positions a specific collimator-filter combination in a specific location between the X-ray source and the imager.

公开(公告)号：US20220362581A1

公开(公告)日：2022-11-17

申请号：US17830347

申请日：2022-06-02

申请人： Varian Medical Systems, Inc.

发明人： Susan KOEHL ,  Ross HANNIBAL

IPC分类号： A61N5/10 ,  H01H13/02 ,  H01H9/16 ,  H01H13/70 ,  A61B6/00 ,  H05G1/58 ,  H05G1/56

摘要： Example methods and apparatuses of controlling a user interface with a plurality of input mechanisms are disclosed. One example method includes causing a first set of input mechanisms in the plurality of input mechanisms to be visually emphasized via a first visual technique while a second set of input mechanisms in the plurality of input mechanisms is not visually emphasized via the first visual technique, receiving a user input via an input mechanism that is included in the first set, based on the user input, determining a third set of input mechanisms in the plurality of input mechanisms and a fourth set of input mechanisms in the plurality of input mechanisms, and causing the third set of input mechanisms to be visually emphasized via the first visual technique while the fourth set of available input mechanisms is not visually emphasized via the first visual technique.

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：US11278739B2

公开(公告)日：2022-03-22

申请号：US15957727

申请日：2018-04-19

申请人： Varian Medical Systems, Inc.

发明人： Ross Hannibal ,  Wade Curtiss

IPC分类号： A61N5/10 ,  H01H13/02 ,  H01H9/16 ,  H01H13/70 ,  A61B6/00 ,  H05G1/58 ,  H05G1/56 ,  A61B17/00 ,  H03K17/18 ,  H03K17/96 ,  H03K17/955 ,  A61B6/04

摘要： A motion-enable device includes a mechanical switch and a capacitive sensor with a sensing region that is located adjacent to the mechanical switch. The mechanical switch enables a first signal when closed or actuated that indicates that the mechanical switch is in an active state. The capacitive sensor enables a second signal when a conductive object is disposed in the sensing region, where the second signal indicates that the capacitive sensor is in an active state. Enablement of operation of an apparatus depends on receipt of both the first signal and the second signal. The mechanical switch and the capacitive sensor act as the two separate switches required by functional safety requirements for a motion enable device. Because the sensing region of the capacitive sensor is adjacent to the mechanical switch, the first and second signals are generated when an operator actuates the mechanical switch with a single digit.

公开(公告)号：US11246208B2

公开(公告)日：2022-02-08

申请号：US16666436

申请日：2019-10-29

申请人： SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

发明人： Guoping Zhu ,  Jinglin Wu ,  Tieshan Zhang ,  Siming Chen ,  Xu Chu

IPC分类号： H05G1/52 ,  H01J35/14 ,  H05G1/58

摘要： A method may include obtaining a feedback or a reference value of a tube voltage applied to a radiation source of a radiation device for generating radiation rays. The method may also include determining, based on the feedback or the reference value of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the radiation device. The method may further include causing the focusing device to shape a focus of the radiation rays according to the determined value of the focusing parameter. The focus of the radiation rays may satisfy an operational constraint under the specific value of the focusing parameter.

公开(公告)号：US11089667B2

公开(公告)日：2021-08-10

申请号：US16842925

申请日：2020-04-08

申请人： CANON MEDICAL SYSTEMS CORPORATION

发明人： Hiroshi Hirayama ,  Sanae Harada ,  Takenori Mizuno ,  Masahiro Karahashi

IPC分类号： H05G1/32 ,  H05G1/10 ,  H01J35/06 ,  H01J35/08 ,  H01J35/04 ,  H05G1/58 ,  H05G1/38

摘要： According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a high voltage power supply, and focus size control circuitry. The X-ray tube includes a cathode, an anode, and a deflector configured to deflect the electrons from the cathode. The high voltage power supply generates a tube voltage to be applied between the cathode and the anode. The focus size control circuitry controls a focus size formed in the anode by applying to the deflector a deflecting voltage of a deflecting voltage value based on a tube voltage value of the tube voltage and a predetermined size, in order to form a focus of the predetermined size in the anode during the period where the tube voltage is applied by the high voltage power supply.