公开(公告)号：USRE30947E

公开(公告)日：1982-05-25

申请号：US118686

申请日：1980-02-05

Applicant: Douglas P. Boyd

Inventor： Douglas P. Boyd

IPC: A61B6/03 ,  G01T1/29 ,  H01J47/06

CPC classification number: G01T1/2935 ,  A61B6/032 ,  A61B6/466 ,  H01J47/06

Abstract: A fan-shaped beam of penetrating radiation, such as X-ray or .gamma.-ray radiation, is directed through a slice of the body to be analyzed to a position sensitive detector for deriving a shadowgraph of transmission or absorption of the penetrating radiation by the body. A number of such shadowgraphs are obtained for different angles of rotation of the fan-shaped beam relative to the center of the slice being analyzed. The detected fan beam shadowgraph data is reordered into shadowgraph data corresponding to sets of parallel paths of radiation through the body. The reordered parallel path shadowgraph data is then convoluted in accordance with a 3-D reconstruction method by convolution in a computer to derive a 3-D reconstructed tomograph of the body under analysis. In a preferred embodiment, the position sensitive detector comprises a multiwire detector wherein the wires are arrayed parallel to the direction of the divergent penetrating rays to be detected. A focussed grid collimator is interposed between the body and the position sensitive detector for collimating the penetrating rays to be detected. The source of penetrating radiation is preferably a monochromatic source.

公开(公告)号：US3743840A

公开(公告)日：1973-07-03

申请号：US3743840D

申请日：1972-07-18

Applicant: ATOMIC ENERGY COMMISSION

Inventor： THIESSEN H ,  SOBOTTKA S ,  LEE D

IPC: G01T1/18 ,  H01J47/06

CPC classification number: H01J47/06

Abstract: A helical multiwire proportional chamber for detection of minimum ionizing particles consisting of an array of anode wires surrounded by a cathode wound in the form of a bifilar flattened helix nearly orthogonal to the anode wires and this chamber having an active area rectangular in shape, a frame comprising two pieces of plexiglass with a central cutout which forms the said active area, the anode wires being fastened to one of the frame pieces and the second frame piece being fastened to the first and the anode wires being connected in parallel to a positive high voltage supply and the cathode wire being connected to ground through a resistor.

Abstract translation: 一种用于检测最小电离粒子的螺旋多线比例室，包括由阴极缠绕的阳极线阵列组成的阴极线，所述阴极以与阳极线近似正交的双极扁平螺旋形式，该腔室具有矩形的有源区域，框架 包括两片具有形成所述有源区域的中心切口的有机玻璃，阳极线被紧固到一个框架件，并且第二框架件紧固到第一阳极引线并且正极连接到正高压 电源和阴极线通过电阻器接地。

公开(公告)号：US3383538A

公开(公告)日：1968-05-14

申请号：US51851765

申请日：1965-12-30

Applicant: NAVY USA

Inventor： BOWYER CHARLES S

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US3226197A

公开(公告)日：1965-12-28

申请号：US20970862

申请日：1962-07-13

Applicant: MARTIN SWEETS COMPANY INC

Inventor： LEWIS JAMES E

IPC: G01N31/12 ,  H01J47/06

CPC classification number: G01N31/12 ,  H01J47/06 ,  Y10T436/22 ,  Y10T436/23

公开(公告)号：US2965759A

公开(公告)日：1960-12-20

申请号：US63449657

申请日：1957-01-16

Applicant: EBERLINE INSTR DIVISION OF REY

Inventor： EBERLINE HOWARD C

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US2683221A

公开(公告)日：1954-07-06

申请号：US23118851

申请日：1951-06-12

Applicant: ATOMIC ENERGY COMMISSION

Inventor： GOSSICK BEN R

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US2499830A

公开(公告)日：1950-03-07

申请号：US71132146

申请日：1946-11-21

Applicant: MOLLOY EVERETT W

Inventor： MOLLOY EVERETT W

IPC: H01J47/06

CPC classification number: H01J47/06

公开(公告)号：US08513616B2

公开(公告)日：2013-08-20

申请号：US13501968

申请日：2010-10-15

Applicant: Pascal Desaute

Inventor： Pascal Desaute

IPC: G01T1/185

CPC classification number: H01J47/06 ,  G01T1/185

Abstract: A radiographic imaging device includes a gas avalanche detector detecting and locating X-ray or gamma ray ionizing radiation. The detector has a gas enclosure with an admission window for admitting incident X-ray photons; an intermediate plane electrode in the enclosure between and parallel to two end plane electrodes thereby forming an amplification space constituting a conversion space where the photons are convertible into electrical charges made up of primary electrons and corresponding ions; the intermediate electrode being operable at an electrical potential relative to the electrical potentials of the end electrodes suitable for generating an electric field causing multiplication of the electrons by the avalanche phenomenon in the amplification space near the intermediate electrode; one of the end electrodes being a collector electrode for picking up the electrical signals induced by the ions; and said window being level with the amplification space and between the intermediate plane and collector electrodes.

Abstract translation: 放射线照相成像装置包括检测和定位X射线或γ射线电离辐射的气体雪崩检测器。 检测器具有一个气体外壳，带有允许入射的X射线光子的入口窗口; 外壳中的中间平面电极，并且平行于两个端面电极，从而形成构成转换空间的放大空间，其中光子可转换成由一次电子和相应的离子组成的电荷; 所述中间电极相对于所述末端电极的电位相对于所述中间电极附近的所述放大空间中的雪崩现象产生电场而导致电子倍增的电位工作; 一个端电极是用于拾取由离子引起的电信号的集电极; 并且所述窗口与放大空间以及中间平面和集电极之间平齐。

公开(公告)号：US06661013B2

公开(公告)日：2003-12-09

申请号：US09782003

申请日：2001-02-12

Applicant: Ottmar Jagutzki ,  Horst Schmidt-Böcking ,  Volker Mergel ,  Alfred Cerezo ,  Min Huang

Inventor： Ottmar Jagutzki ,  Horst Schmidt-Böcking ,  Volker Mergel ,  Alfred Cerezo ,  Min Huang

IPC: H01J4720

CPC classification number: G01T1/17 ,  H01J47/06 ,  H01J49/025

Abstract: The invention concerns a device and method for two-dimensional imaging and timing of particles or electromagnetic radiation with improved pulse-pair resolution. A detector, e.g. a michrochannel plate detector with a delay-line anode with three or more conductive members is used as exemplary embodiment for achieving these requirements. Redundant position and timing information is used for uniquely determine the timing and position of two or more particles, even if they arrive at the same time at the detector.

公开(公告)号：US5517030A

公开(公告)日：1996-05-14

申请号：US244913

申请日：1994-06-14

Applicant: Carlos A. Nabais Conde ,  Joaquim Marques Ferreira dos Santos ,  Antonio C. Sena Sao Miguel Benito

Inventor： Carlos A. Nabais Conde ,  Joaquim Marques Ferreira dos Santos ,  Antonio C. Sena Sao Miguel Benito

IPC: G01T1/205 ,  H01J47/00 ,  H01J47/06

CPC classification number: G01T1/205 ,  H01J47/06

Abstract: Detectors for ionizing radiation (X-rays, gamma rays, electrons, protons, alpha particles, etc. as well as neutrons) of the gas proportional scintillation counter type using techniques to compensate for a loss of scintillation light reaching the photosensor due to solid angle and reflection effects. Two such techniques are disclosed. One technique involves the use of two non-parallel electrically charged grids which produce a radially increasing electric field, thus radially increasing the intensity of the scintillation light. Another technique involves the use of a mask of small opaque dots having a radially decreasing density covering the photosensor, thus radially increasing the intensity of the scintillation light transmitted to the photosensor. The preferred embodiment for X-ray detection consists in a detector, filled with very pure xenon at atmospheric pressure, with a 2.5 cm diameter radiation window (1), a grid with a spherical (2 cm radius) curvature (2) with its edges placed 0.8 cm away from a plane grid which is placed in contact with or close to a photomultiplier tube (4). This photomultiplier has uniform sensitivity in the 170 nm wavelength region. This detector presents an energy resolution of 8.0% for 5.9 keV X-rays.

Abstract translation: PCT No.PCT / PT93 / 00007 Sec。 371日期：1994年6月14日 102（e）日期1994年6月14日PCT提交1993年10月15日PCT公布。 第WO94 / 09509号公报 日期1994年4月28日。气体成比例闪烁计数器类型的电离辐射（X射线，γ射线，电子，质子，α粒子等以及中子）的检测器使用技术来补偿闪烁光的损失 由于立体角度和反射效应，到达光电传感器。 公开了两种这样的技术。 一种技术涉及使用两个不平行的带电栅极，其产生径向增加的电场，从而径向增加闪烁光的强度。 另一种技术涉及使用覆盖光电传感器的径向减小密度的小不透明点的掩模，从而径向增加传输到光传感器的闪烁光的强度。 用于X射线检测的优选实施例包括在大气压下填充非常纯的氙的检测器，具有2.5cm直径的辐射窗（1），具有球形（2cm半径）曲率（2）的栅格，其边缘 放置在与光电倍增管（4）接触或接近的平面栅格0.8cm处。 该光电倍增管在170nm波长区域具有均匀的灵敏度。 该检测器对于5.9keV X射线的能量分辨率为8.0％。