公开(公告)号：US20120018642A1

公开(公告)日：2012-01-26

申请号：US13256594

申请日：2010-03-19

申请人： Kentaro Fukuda ,  Sumito Ishizu ,  Noriaki Kawaguchi ,  Toshihisa Suyama ,  Akira Yoshikawa ,  Takayuki Yanagida ,  Yui Yokota ,  Hidetoshi Kubo ,  Toru Tanimori ,  Hiroyuki Sekiya

发明人： Kentaro Fukuda ,  Sumito Ishizu ,  Noriaki Kawaguchi ,  Toshihisa Suyama ,  Akira Yoshikawa ,  Takayuki Yanagida ,  Yui Yokota ,  Hidetoshi Kubo ,  Toru Tanimori ,  Hiroyuki Sekiya

IPC分类号： G01T1/202 ,  G01T1/20

CPC分类号： G01T1/28 ,  H01J31/49 ,  H01J47/02

摘要： [Problems to be Solved] It is an object of the present invention to provide a novel radiographic image detector which can detect radiation, such as hard X-rays or γ-rays, with high sensitivity and which is excellent in position resolution and count rate characteristic.[Means to Solve the Problems] A radiographic image detector comprises a combination of a scintillator, such as a lanthanum fluoride crystal containing neodymium, for converting incident radiation into ultraviolet rays; and a gas multiplication ultraviolet image detector for converting ultraviolet rays into electrons, amplifying such electrons by use of a gas electron avalanche phenomenon, and detecting the electrons. The radiographic image detector is characterized in that the gas multiplication ultraviolet image detector is basically constituted by a photoelectric conversion substance, such as cesium iodide or cesium telluride, for converting ultraviolet rays into electrons; a gas electron multiplier for amplifying electrons by use of the gas electron avalanche phenomenon; and a pixel electrode having an amplification function and a detection function.

摘要翻译： [待解决的问题]本发明的目的是提供一种能够以高灵敏度检测诸如硬X射线或γ射线等辐射的新型放射线图像检测器，其位置分辨率和计数率优异 特性。 解决问题的手段放射线图像检测器包括闪烁体，例如含有钕的氟化镧晶体，用于将入射辐射转换成紫外线的组合; 以及用于将紫外线转换成电子的气体倍增紫外线图像检测器，利用气体电子雪崩现象来放大这些电子，并检测电子。 射线照相图像检测器的特征在于，气相色谱紫外图像检测器基本上由诸如碘化铯或碲化铯的光电转换物质构成，用于将紫外线转换成电子; 用于通过使用气体电子雪崩现象来放大电子的气体电子倍增器; 以及具有放大功能和检测功能的像素电极。

公开(公告)号：US20090304141A1

公开(公告)日：2009-12-10

申请号：US12298115

申请日：2007-03-08

申请人： Tetsuo Nakazawa ,  Toru Tanimori ,  Takashi Shirahata ,  Osamu Miyazaki ,  Koichi Hirokawa

发明人： Tetsuo Nakazawa ,  Toru Tanimori ,  Takashi Shirahata ,  Osamu Miyazaki ,  Koichi Hirokawa

IPC分类号： H05G1/60

CPC分类号： G01T1/2985 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  G01T1/2935

摘要： The photon counting type detector 122 includes a drift electrode 122a, an MSGC 122b provided at a prescribed interval and a drift region 122c formed by sealing gas between the drift electrode 122a and the MSGC 122b. The projection data outputted from the photon counting type detector 122 is discriminated by the discrimination circuit 162 for each of X-ray energies and a CT image is reconstructed based on the projection data after discrimination, thereby providing an energy discrimination type X-ray CT apparatus capable of improving image quality at lower cost.

摘要翻译： 光子计数型检测器122包括以规定间隔设置的漂移电极122a，MSGC 122b以及通过密封漂移电极122a与MSGC 122b之间的气体形成的漂移区域122c。 从光子计数型检测器122输出的投影数据由识别电路162对于每个X射线能量进行鉴别，并且基于鉴别之后的投影数据重建CT图像，从而提供能量鉴别型X射线CT装置 能够以更低的成本提高图像质量。

公开(公告)号：US6097032A

公开(公告)日：2000-08-01

申请号：US89882

申请日：1998-06-03

申请人： Toru Tanimori ,  Atsuhiko Ochi

发明人： Toru Tanimori ,  Atsuhiko Ochi

IPC分类号： G01T1/185 ,  G01T1/29 ,  G06F17/40 ,  H01J47/02

CPC分类号： G01T1/2935

摘要： An imaging microstrip gas chamber (MSGC) high-speed data acquisition system capable of processing at high speed a large number of output signals of an imaging microstrip gas chamber. The system includes discrimination circuits for binary conversion of signals from anode strips and back strips of a two-dimensional microstrip gas chamber; signal synchronizing circuits for converting binary asynchronous signals output from the discrimination circuits into clock-synchronized signals; data encoder circuits connected to the signal synchronizing circuits; an incident-particle hit judgment circuit connected to the data encoder circuits and operating such that when a plurality of adjacent signal lines receive signals at the same timing, a value corresponding to a signal line at the center of the adjacent signal lines is output, and when separated signal lines receive signals at the same timing, the signals are ignored; a storage device connected to the incident-particle hit judgment circuit and adapted to store, for each event, the vertical and horizontal coordinates of an incident particle, the timing of incidence of the particle, the degree of spreading of output signals, and the energy of the incident particle obtained from an overall pulse height; and a computer connected to the storage device.

公开(公告)号：US06822239B2

公开(公告)日：2004-11-23

申请号：US10069237

申请日：2002-02-22

申请人： Toru Tanimori ,  Atsuhiko Ochi

发明人： Toru Tanimori ,  Atsuhiko Ochi

IPC分类号： G01T118

CPC分类号： G01T1/185

摘要： A particle beam image detector employing gas amplification attained by pixel-type electrodes has high sensitivity and improved reliability of electrodes. Electrons e− produced through ionization of the gas move under the force of a drift field toward a pixel in the form of a columnar anode electrode. Avalanche amplification occurs in the vicinity of the columnar anode electrode due to a strong electric field between anode and cathode and the pointed shape of the electrode. The positive ions quickly drift toward strip-shaped cathode electrodes. Electric charges are generated on the columnar anode electrodes and also on the strip-shaped cathodes and these electric charges are observable to determine the anode or cathode strip at which this amplification phenomenon occurs and thus to obtain information as to position of the incident particle beam.

摘要翻译： 使用由像素型电极获得的气体放大的粒子束图像检测器具有高灵敏度和改善电极的可靠性。 通过气体离子化产生的电子e e在漂移场的作用下朝向柱状阳极电极形式的像素移动。 由于阳极和阴极之间的强电场和电极的尖的形状，在柱状阳极电极附近发生雪崩放大。 正离子快速漂移到条状阴极电极。 在柱状阳极电极和带状阴极上产生电荷，并且观察到这些电荷以确定发生该放大现象的阳极或阴极条，从而获得有关入射的粒子束的位置的信息。

公开(公告)号：US6118849A

公开(公告)日：2000-09-12

申请号：US441157

申请日：1999-11-12

申请人： Toru Tanimori ,  Atsuhiko Ochi

发明人： Toru Tanimori ,  Atsuhiko Ochi

IPC分类号： G01T1/185 ,  G01T1/29 ,  G06F17/40 ,  H01J47/02 ,  G01N23/20

CPC分类号： G01T1/2935

摘要： An imaging microstrip gas chamber (MSGC) high-speed data acquisition system capable of processing at high speed a large number of output signals of an imaging microstrip gas chamber. The system includes discrimination circuits for binary conversion of signals from anode strips and back strips of a two-dimensional microstrip gas chamber; signal synchronizing circuits for converting binary asynchronous signals output from the discrimination circuits into clock-synchronized signals; data encoder circuits connected to the signal synchronizing circuits; an incident-particle hit judgment circuit connected to the data encoder circuits and operating such that when a plurality of adjacent signal lines receive signals at the same timing, a value corresponding to a signal line at the center of the adjacent signal lines is output, and when separated signal lines receive signals at the same timing, the signals are ignored; a storage device connected to the incident-particle hit judgment circuit and adapted to store, for each event, the vertical and horizontal coordinates of an incident particle, the timing of incidence of the particle, the degree of spreading of output signals, and the energy of the incident particle obtained from an overall pulse height; and a computer connected to the storage device.

摘要翻译： 一种成像微带气室（MSGC）高速数据采集系统，能够高速处理成像微带气室的大量输出信号。 该系统包括用于二维转换来自阳极条和二维微带气体室的背条的信号的鉴别电路; 用于将从鉴别电路输出的二进制异步信号转换为时钟同步信号的信号同步电路; 连接到信号同步电路的数据编码器电路; 连接到数据编码器电路并进行操作的入射粒子命中判断电路，当多个相邻信号线在相同的定时接收信号时，输出与相邻信号线的中心的信号线对应的值， 当分离的信号线在相同的定时接收信号时，信号被忽略; 连接到入射粒子命中判定电路的存储装置，适用于每个事件存储入射粒子的垂直和水平坐标，粒子入射时间，输出信号的扩散程度和能量 从整体脉冲高度获得的入射颗粒; 以及连接到存储设备的计算机。