公开(公告)号：US20230375484A1

公开(公告)日：2023-11-23

申请号：US18030948

申请日：2021-10-08

Applicant: The University of North Carolina at Chapel Hill

Inventor： Christina Inscoe ,  Yueh Zenas Lee ,  Boyuan LI

IPC: G01N23/046 ,  H01J35/06 ,  H01J35/14 ,  G06T11/00 ,  H01J35/04

CPC classification number: G01N23/046 ,  H01J35/065 ,  H01J35/147 ,  H01J35/153 ,  G06T11/005 ,  H01J35/045 ,  G01N2223/419 ,  G01N2223/6126 ,  G01N2223/6123 ,  G01N2223/424 ,  G01N2223/3301 ,  G01N2223/401 ,  G01N2223/313 ,  G01N2223/055 ,  G01N2223/421 ,  G01N2223/206 ,  H01J2201/30469 ,  G06T2211/408

Abstract: A multisource volumetric spectral computed tomography imaging device includes an x-ray source array with multiple spatially distributed x-ray focal spots, an x-ray beam collimator with an array of apertures, each confining the radiation from a corresponding x-ray focal spot to illuminate a corresponding segment of an object, a digital area x-ray detector, and a gantry to rotate the x-ray source array and the detector around the object. An electronic control unit activates the radiations from the x-ray focal spots to scan the object multiple times as the gantry rotates around the object. The images are used to reconstruct a volumetric CT image of the object with reduced scattered radiation. For dual energy and multi energy imaging, radiation from each focal spot is filtered by a corresponding spectral filter to optimize its energy spectrum.

公开(公告)号：US20230371914A1

公开(公告)日：2023-11-23

申请号：US18228236

申请日：2023-07-31

Applicant: Varian Medical Systems, Inc.

Inventor： Arundhuti GANGULY ,  Gary F. VIRSHUP ,  Michelle RICHMOND ,  Billy Dan JONES

IPC: A61B6/00 ,  H05G1/58 ,  G21K1/10 ,  H05G1/60

CPC classification number: A61B6/484 ,  H05G1/58 ,  A61B6/482 ,  G21K1/10 ,  H05G1/60 ,  H01J35/045

Abstract: A system can have an x-ray source that generates a series of individual x-ray pulses for multi-energy imaging. A first x-ray pulse can have a first energy level and a subsequent second x-ray pulse in the series can have a second energy level different from the first energy level. An x-ray imager can receive the x-rays from the x-ray source and can detect the received x-rays for image generation. A generator interface box (GIB) controls the x-ray source to provide the series of individual x-ray pulses and synchronizes detection by the x-ray imager with generation of the individual x-ray pulses. The GIB can control x-ray pulse generation and synchronization to optimize image generation while minimizing unnecessary x-ray irradiation.

公开(公告)号：US20180139829A1

公开(公告)日：2018-05-17

申请号：US15807700

申请日：2017-11-09

Applicant: Philipp Bernhardt ,  Thomas Ferger ,  Markus Schild ,  Kai-Uwe Taubenreuther ,  Mathias Kraus

Inventor： Philipp Bernhardt ,  Thomas Ferger ,  Markus Schild ,  Kai-Uwe Taubenreuther ,  Mathias Kraus

IPC: H05G1/32

CPC classification number: A61B6/487 ,  A61B6/40 ,  A61B6/405 ,  A61B6/486 ,  A61B6/504 ,  A61B6/54 ,  A61B6/542 ,  G21K1/067 ,  H01J35/04 ,  H01J35/045 ,  H01J35/06 ,  H01J35/08 ,  H01J35/10 ,  H05G1/085 ,  H05G1/26 ,  H05G1/265 ,  H05G1/28 ,  H05G1/30 ,  H05G1/32 ,  H05G1/34 ,  H05G1/38 ,  H05G1/56

Abstract: Systems and methods are provided for generating X-ray pulses during X-ray imaging. A high voltage of an X-ray tube is automatically switched off. The tube voltage decays and upon reaching a predefined threshold value of the tube voltage or a predefined waiting time after switching off the high voltage, a grating voltage of a grating arranged between an emitter and an anode of the X-ray tube is automatically switched on. No electrons reach the anode from the emitter, and the tube current drops to the value zero.

公开(公告)号：US20180038988A1

公开(公告)日：2018-02-08

申请号：US15437033

申请日：2017-02-20

Applicant: Rapiscan Systems, Inc.

Inventor： Edward James Morton

IPC: G01V5/00 ,  G21K1/02 ,  G01N23/04 ,  G01N24/08 ,  H01J35/04 ,  G01N23/203 ,  A61B6/02 ,  A61B6/03 ,  A61B6/00

CPC classification number: G01V5/0033 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4488 ,  A61B6/482 ,  A61B6/505 ,  G01N23/04 ,  G01N23/046 ,  G01N23/203 ,  G01N24/084 ,  G01N2223/419 ,  G01V5/005 ,  G21K1/025 ,  H01J35/045

Abstract: The present invention provides for an improved scanning process with a stationary X-ray source arranged to generate X-rays from a plurality of X-ray source positions around a scanning region, a first set of detectors arranged to detect X-rays transmitted through the scanning region, and at least one processor arranged to process outputs from the first set of detectors to generate tomographic image data. The X-ray screening system is used in combination with other screening technologies, such as NQR-based screening, X-ray diffraction based screening, X-ray back-scatter based screening, or Trace Detection based screening.

公开(公告)号：US09869644B2

公开(公告)日：2018-01-16

申请号：US14937706

申请日：2015-11-10

Applicant: Los Alamos National Security, LLC

Inventor： Laura Smilowitz ,  Bryan Henson

IPC: G01N23/222 ,  G01N23/04 ,  G01N33/22 ,  H01J35/04 ,  H05G1/62 ,  H05G1/08

CPC classification number: G01N23/043 ,  G01N23/04 ,  G01N33/227 ,  H01J35/045 ,  H05G1/085 ,  H05G1/62

Abstract: Disclosed herein are representative embodiments of methods, apparatus, and systems for performing radiography. For example, certain embodiments concern X-ray radiography of spontaneous events. Particular embodiments of the disclosed technology provide continuous high-speed x-ray imaging of spontaneous dynamic events, such as explosions, reaction-front propagation, and even material failure. Further, in certain embodiments, x-ray activation and data collection activation are triggered by the object itself that is under observation (e.g., triggered by a change of state detected by one or more sensors monitoring the object itself).

公开(公告)号：US20170287671A1

公开(公告)日：2017-10-05

申请号：US15086257

申请日：2016-03-31

Applicant: General Electric Company

Inventor： Sergio Lemaitre

IPC: H01J35/06 ,  H01J35/14 ,  A61B6/03

CPC classification number: H01J35/065 ,  A61B6/032 ,  A61B6/40 ,  A61B6/56 ,  H01J35/045 ,  H01J35/06 ,  H01J35/14

Abstract: In the present invention, a computed tomography system, an X-ray tube used therein and a cathode assembly disposed in the X-ray tube, as well as an associated method of use, is provided that includes a gantry and the X-ray tube coupled to the gantry. The X-ray tube includes the cathode assembly having a pair of emitters for generating an electron beam, where the pair of emitters are disposed in the casing at angles with respect to one another. The X-ray tube further includes a focusing electrode for focusing the electron beam, an extraction electrode which electrostatically controls the intensity of the electron beam, a target for generating X-rays when impinged upon by the electron beam and a magnetic focusing assembly located between the cathode assembly and the target for focusing the electron beam towards the target.

公开(公告)号：US09775225B2

公开(公告)日：2017-09-26

申请号：US14741518

申请日：2015-06-17

Applicant: Toshiba Medical Systems Corporation

Inventor： Emi Tamura ,  Yasuo Saito ,  Takuzo Takayama ,  Hiroaki Miyazaki ,  Hiroaki Nakai

IPC: A61B6/00 ,  H05G1/32 ,  A61B6/03 ,  A61B6/06 ,  H01J35/06 ,  H01J35/04

CPC classification number: H05G1/32 ,  A61B6/032 ,  A61B6/035 ,  A61B6/06 ,  A61B6/4007 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/44 ,  A61B6/4488 ,  A61B6/482 ,  A61B6/503 ,  A61B6/5205 ,  A61B6/54 ,  A61B6/56 ,  H01J35/045 ,  H01J35/065 ,  H01J2235/062 ,  H01J2235/068

Abstract: A gantry includes two X-ray source rings and a detector ring. Each X-ray source ring includes a plurality of X-ray sources arrayed circumferentially. The detector ring is provided next to the X-ray source ring and includes a plurality of X-ray detectors arrayed circumferentially. Each of the plurality of X-ray detectors detects X-rays from the X-ray source ring. A data collection circuit collects raw data corresponding to the intensity of the detected X-rays. A reconstruction unit reconstructs the collected raw data into a CT image based on digital data.

公开(公告)号：US20170118830A1

公开(公告)日：2017-04-27

申请号：US15292487

申请日：2016-10-13

Applicant: Toshiba Medical Systems Corporation

Inventor： Yuki TOTSUKA ,  Akio Tetsuka ,  Masaharu Soya

IPC: H05G1/46 ,  H01J35/06 ,  H01J35/08 ,  H05G1/26

CPC classification number: H05G1/46 ,  H01J35/045 ,  H01J35/06 ,  H01J35/08 ,  H05G1/085 ,  H05G1/265

Abstract: An X-ray diagnostic apparatus according to embodiments includes an X-ray tube assembly and a grid potential control circuitry. The X-ray tube assembly includes a filament that emits electrons, a target that generates X-rays by receiving the electrons, and a grid having a potential for adjusting a potential gradient around the filament. The grid potential control circuitry switches the potential of the grid to a potential where the potential gradient around the filament becomes greater than a potential gradient generated by a potential of the filament and a potential of the target.

公开(公告)号：US20160313262A1

公开(公告)日：2016-10-27

申请号：US14937706

申请日：2015-11-10

Applicant: Los Alamos National Security, LLC

Inventor： Laura Smilowitz ,  Bryan Henson

IPC: G01N23/04 ,  H05G1/56

CPC classification number: G01N23/043 ,  G01N23/04 ,  G01N33/227 ,  H01J35/045 ,  H05G1/085 ,  H05G1/62

Abstract: Disclosed herein are representative embodiments of methods, apparatus, and systems for performing radiography. For example, certain embodiments concern X-ray radiography of spontaneous events. Particular embodiments of the disclosed technology provide continuous high-speed x-ray imaging of spontaneous dynamic events, such as explosions, reaction-front propagation, and even material failure. Further, in certain embodiments, x-ray activation and data collection activation are triggered by the object itself that is under observation (e.g., triggered by a change of state detected by one or more sensors monitoring the object itself).

Abstract translation: 这里公开了用于执行射线照相术的方法，装置和系统的代表性实施例。 例如，某些实施例涉及自发事件的X射线摄影。 所公开技术的特定实施例提供了自发动态事件的连续高速x射线成像，例如爆炸，反向前传播，甚至物料故障。 此外，在某些实施例中，x射线激活和数据收集激活由正在观察的对象本身触发（例如，由监视对象本身的一个或多个传感器检测到的状态改变触发）。

公开(公告)号：US09406478B2

公开(公告)日：2016-08-02

申请号：US13175707

申请日：2011-07-01

Applicant: Curtis A. Birnbach ,  William H. Joyce ,  Mark L. Manewitz

Inventor： Curtis A. Birnbach ,  William H. Joyce ,  Mark L. Manewitz

IPC: B01J19/12 ,  H01J35/06 ,  B01J4/00 ,  B01J19/08 ,  C01B17/74 ,  C01D3/04 ,  H01J35/04 ,  H01J35/08 ,  H01J35/16 ,  H01J35/18 ,  H01J35/14

CPC classification number: H01J35/06 ,  B01J4/004 ,  B01J19/085 ,  B01J19/125 ,  B01J2219/00164 ,  B01J2219/00198 ,  B01J2219/00211 ,  B01J2219/00231 ,  C01B17/745 ,  C01D3/04 ,  H01J35/045 ,  H01J35/08 ,  H01J35/14 ,  H01J35/16 ,  H01J35/18 ,  H01J2235/087 ,  H01J2235/163 ,  H01J2235/166 ,  H01J2235/186

Abstract: A method for inducing chemical reactions using X-ray radiation comprises generating an irradiation volume within the interior of a reaction vessel by introducing X-ray radiation into the volume, in which two or more reactants are introduced. With respect to the two or more reactants and any subsequently created intermediate reactant or reactants, the aggregate extent to which the foregoing reactants are to be ionized to any degree is selectively controlled, and the average degree of ionization in the irradiation volume, from partial to total, of that portion of the foregoing reactants which is to be ionized is selectively controlled, through control of the fluence and energy of the X-ray radiation, to thereby induce selective reactions of reactants to occur in the irradiation volume. One or more reactants may be delivered through a double-walled pipe containing X-ray shielding to prevent their premature irradiation before being injected into the irradiation volume.

Abstract translation: 使用X射线辐射诱导化学反应的方法包括通过将X射线辐射引入其中引入两种或更多种反应物的体积来在反应容器的内部产生照射体积。 对于两种或更多种反应物和任何随后产生的中间体反应物或反应物，上述反应物在任何程度上被离子化的聚集程度被选择性地控制，并且照射体积中的平均离子化程度从部分到 通过控制X射线辐射的能量密度和能量来选择性地控制上述被离子化的反应物的那一部分的总和，从而诱导反应物在照射体积中发生选择性反应。 一个或多个反应物可以通过含有X射线屏蔽的双壁管道输送，以防止其在注入照射体积之前过早照射。