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公开(公告)号：US5192861A
公开(公告)日：1993-03-09
申请号：US675652
申请日：1991-03-27
Applicant: Amox Breskin , Rachel Chechik , Stanislaw Majewski
Inventor： Amox Breskin , Rachel Chechik , Stanislaw Majewski
IPC: H01J47/02
CPC classification number: H01J47/02
Abstract: An X-ray detector including a photocathode arranged to receive X-ray radiation and being operative to provide in response thereto an output of electrons, and at least one electron multiplier operative at subatmospheric pressure and in response to the output of electrons from the photocathode to provide an avalanche including an increased number of electrons.
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公开(公告)号：US5003176A
公开(公告)日：1991-03-26
申请号：US509739
申请日：1990-04-17
Applicant: Eiichi Tanaka , Tatsuro Hayashi
Inventor： Eiichi Tanaka , Tatsuro Hayashi
Abstract: An ionization chamber can stably measure a weak ionizing radiation with high sensitivity. The ionization chamber comprises an electrically conductive charge collecting electrode having a magnetic substance or a permanent magnet; an electromagnet for positioning the charge collecting electrode in non-contact with the other part of the ionization chamber; a position sensor for detecting the position of the charge collecting electrode; a circuit for feedback-controlling the magnetic force of the electromagnet to maintain the charge collecting electrode at the substantially same position; and ionization current detecting circuit for detecting an ionization current collected at the charge collecting electrode by ionization due to radiation applied to the ionization chamber.
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公开(公告)号：US4956557A
公开(公告)日：1990-09-11
申请号：US311107
申请日：1989-02-15
Applicant: Hugo Vlasbloem
Inventor： Hugo Vlasbloem
CPC classification number: H01J47/02
Abstract: There is disclosed a dosimeter to be used in connection with slit radiography and comprised of a gas filled chamber with one side wall provided with a plurality of X-ray transparent strip-like electrodes extending substantially transversely to a longitudinal direction of the oblong-shaped casing and another side wall provided with wire electrodes extending parallel to such longitudinal direction of the oblong-shaped casing wherein each of the strip-like electrodes generates a signal representative of intensity of ionizing radiation and wherein the strip-like electrodes are divided into a number of groups, signals from the strip-like electrodes belonging to each group are combined to provide a control signal for a respective attenuation element.
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公开(公告)号：US4777349A
公开(公告)日：1988-10-11
申请号：US801907
申请日：1985-11-26
Applicant: David M. Smith , Andrew James
Inventor： David M. Smith , Andrew James
CPC classification number: H01J9/50 , H01J47/02 , Y02W30/828
Abstract: In an instrument used to measure x-rays of the kind in which a wire anode operates in a gaseous atmosphere in a sealed housing to detect x-rays, the instrument is rejuvenated by passing a heating current through the anode to raise its temperature for a period of between two and six hours to convert any impurities to a compound.
Abstract translation: 在用于测量线阳极在密封壳体中的气体气氛中操作以检测x射线的类型的X射线的仪器中，通过使加热电流通过阳极来升高其温度，使仪器恢复活力 时间为2至6小时，以将任何杂质转化为化合物。
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公开(公告)号：US4763008A
公开(公告)日：1988-08-09
申请号：US892969
申请日：1986-08-04
Applicant: Douglas S. Steele
Inventor： Douglas S. Steele
CPC classification number: G01T1/185 , H01J47/02 , H05K1/0218
Abstract: An ionization detector comprises a substrate having detector traces adjacent conductive grounded traces to minimize crosstalk and charge leakage between the detector traces and to reduce the effects of contamination and humidity.
Abstract translation: 电离检测器包括具有邻近导电接地迹线的检测器迹线的衬底，以最小化检测器迹线之间的串扰和电荷泄漏并减少污染和湿度的影响。
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Patent Agency Ranking
公开(公告)号：US4691108A
公开(公告)日：1987-09-01
申请号：US834262
申请日：1986-02-27
Applicant: Douglas S. Steele
Inventor： Douglas S. Steele
CPC classification number: H01J47/02
Abstract: In an invention detector having an array of detectors, grounding pads are positioned in the spaces between some detectors (data detectors) and other detectors (reference detectors). The grounding pads are kept at zero electric potential, i.e., grounded. The grounding serves to (1) drain away electrons and thereby prevent an unwanted accumulation of charge in the spaces, and (2) cause the electric field lines to be more perpendicular to the detectors in regions near the grounding pads.
Abstract translation: 在具有检测器阵列的发明检测器中，接地垫位于一些检测器（数据检测器）和其它检测器（参考检测器）之间的空间中。 接地焊盘保持在零电位，即接地。 接地用于（1）排出电子，从而防止电荷在空间中的不期望的积累，和（2）使电场线在接地焊盘附近的区域中与检测器更垂直。
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公开(公告)号：US4686369A
公开(公告)日：1987-08-11
申请号：US808610
申请日：1985-12-13
Applicant: David L. McDaniel , Paul R. Granfors , David M. Hoffman
Inventor： David L. McDaniel , Paul R. Granfors , David M. Hoffman
CPC classification number: H01J47/02
Abstract: An apparatus for detecting propogating energy in a defined space includes a medium disposed within the space which interacts with the incident propogating energy to produce secondary energy. An electrostatic field is impressed across the defined space for directing the secondary energy toward a planar detector located at one end of the space. Adjacent the detector is positioned a planar grid for preventing the secondary energy from being detected by the detector prior to passage through the grid. The grid comprises a three layer device having a middle layer formed of an electrically insulative sheet material of a relatively stiff structure. The other two layers comprise conductive layers on opposed surfaces of the first layer which are connected to an electric potential for creating a field across the grid structure and a further field between the grid structure and the detector for accelerating the secondary energy toward the detector in the area of the grid at a space between the grid and detector.
Abstract translation: 用于在限定的空间中检测传播能量的装置包括设置在空间内的介质，其与入射的传播能量相互作用以产生二次能量。 静电场穿过限定的空间，用于将二次能量引向位于空间一端的平面探测器。 邻近探测器的平面格栅被设置成防止二次能量在通过栅格之前被检测器检测到。 栅格包括具有由相对刚性结构的电绝缘片材形成的中间层的三层器件。 另外两个层包括在第一层的相对表面上的导电层，其连接到用于在栅格结构之间产生场的电位，并且在栅格结构和检测器之间的另外的场，用于在第二层中加速次级能量朝向检测器 网格与检测器间的空间区域。
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公开(公告)号：US4617465A
公开(公告)日：1986-10-14
申请号：US610695
申请日：1984-05-16
Applicant: Yuzo Yoshida
Inventor： Yuzo Yoshida
CPC classification number: H01J47/02 , H01J47/004 , A61B6/032
Abstract: A radiation detector has a housing in which is sealed a gas to be ionized when X-rays are projected therein. A plurality of electrodes for detecting the X-rays are arranged in the housing, and the housing is curved with a fixed curvature along the arranged direction of the electrodes. A vessel portion of the housing is closed by a cover portion. A cut extending in the longitudinal direction of the housing is formed in one side wall of the vessel portion. The cut is closed by an X-ray window. A window member of the X-ray window is made of carbon fiber reinforced plastics. The window member is bonded to the inside face of the side wall of the vessel portion, and is pressed against the inside face by the pressure of the gas sealed in the housing. Thus, the window member and the vessel portion are fully hermetically sealed. Since the X-ray transmission factor of the carbon fiber reinforced plastics is high, even low-energy X-rays can be projected with high intensity between the electrodes.
Abstract translation: 辐射检测器具有壳体，当X射线投射在其中时，其中密封待离子化的气体。 用于检测X射线的多个电极被布置在壳体中，并且壳体沿着电极的排列方向以固定的曲率弯曲。 壳体的容器部分由盖部封闭。 在壳体的纵向方向上延伸的切口形成在容器部分的一个侧壁中。 切割由X射线窗口封闭。 X光窗口的窗构件由碳纤维增强塑料制成。 窗构件与容器部分的侧壁的内表面接合，并且被密封在壳体中的气体的压力压靠在内表面上。 因此，窗构件和容器部分被完全气密地密封。 由于碳纤维增强塑料的X射线透过率高，所以即使在电极之间也能够高强度地投射低能X射线。
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公开(公告)号：US4613314A
公开(公告)日：1986-09-23
申请号：US565672
申请日：1983-12-27
Applicant: Douglas S. Steele
Inventor： Douglas S. Steele
CPC classification number: H01J47/02
Abstract: The present invention relates to the manufacture of ionization detectors used in X-ray tomographic imaging. One form of the invention discusses a method of manufacturing an array of ionization detectors which reduces spurious electric currents in the detectors when the detector spacing is in the 1.5 mil range. Also discussed is a method of manufacture of a chamber for containing an ionizable gas such as xenon, and of sealing the detector array at its point of entry into the chamber in order to prevent the escape of xenon.
Abstract translation: 本发明涉及用于X射线层析成像的电离检测器的制造。 本发明的一种形式讨论了制造电离检测器阵列的方法，当检测器间距在1.5密耳范围内时，电离检测器阵列减少了检测器中的杂散电流。 还讨论了制造用于容纳诸如氙气的可电离气体的室的方法，并且在其入口处密封检测器阵列以防止氙气逸出。
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公开(公告)号：US4563586A
公开(公告)日：1986-01-07
申请号：US587760
申请日：1984-03-09
Applicant: John A. Jordan
Inventor： John A. Jordan
Abstract: A combination portable ionization chamber and support for mounting and adjustably aligning the chamber to an X-ray cassette so that the ionization chamber is accurately positioned in line with a source of radiation and a body part or object being X-rayed wherein the support is suspended from the X-ray cassette and retains the ionization chamber in position abutting the rear surface of the X-ray cassette so that when sufficient radiation has been detected by the ionization chamber to insure an acceptable radiograph, power to the radiation source will be automatically terminated.
Abstract translation: 一种组合便携式电离室和用于将腔室安装和可调整地对准X射线盒的支撑件，使得电离室精确地定位成与辐射源成对准并且被X射线照射的身体部分或物体，其中支撑件被悬挂 并且将电离室保持在与X射线盒的后表面邻接的位置，使得当电离室检测到足够的辐射以确保可接受的射线照相时，辐射源的功率将被自动终止 。
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