Methods Patents (Class 250/371)
  • Patent number: 10383585
    Abstract: In an X-ray scanning apparatus including a photon counting type X-ray detection element, in order to perform counted number correction specialized for pile-up with high accuracy, the X-ray scanning apparatus includes an X-ray detector in which a plurality of photon counting type X-ray detection elements are disposed, each of the X-ray detection elements detecting an incident X-ray photon, classifying energy of the X-ray photon into two or more energy ranges, and counting the X-ray photon, and a correction unit that corrects the counted number in the X-ray detection element, in which the correction unit includes a counting error amount determination part that determines a counting error amount in a counted number due to pile-up according to a pile-up occurrence probability in two or more X-ray photons.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: August 20, 2019
    Assignee: HITACHI, LTD.
    Inventor: Yasutaka Konno
  • Patent number: 10222258
    Abstract: An imaging and pulse detection pixel and an array of imaging and pulse detection pixels are provided. Each imaging and pulse detection pixel includes an optical detection device connected directly to a first and second transistor only, a pulse detection circuit that operates on the signal read out from the optical detection device and outputs a pulse detection output signal suitable for detection of pulses, and an imaging circuit that operates on a signal read out from the optical detection device and outputs an image output signal suitable for generation of an image. A terminal of the optical detection device is directly connected to only a gate terminal of the first transistor and a non-gate terminal of the second transistor.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: March 5, 2019
    Assignee: Sensors Unlimited, Inc.
    Inventor: Joshua Lund
  • Patent number: 10101473
    Abstract: The present disclosure provides a semiconductor detector. The semiconductor detector comprises: a detector crystal including a crystal body, an anode and a cathode; a field enhance electrode for applying a voltage to the detector crystal; an insulating material disposed between the field enhanced electrode and a surface of the detector crystal. The semiconductor detector further comprises a field enhanced electrode circuit board having a bottom connection layer in contact with the surface of the detector crystal and a top layer opposite to the bottom connection layer, wherein the top layer is connected to a high voltage input terminal of the semiconductor detector, and an insulating material is provided between the bottom connection layer and the detector surface of the detector crystal.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: October 16, 2018
    Assignee: Nuctech Company Limited
    Inventors: Lan Zhang, Yingshuai Du, Bo Li, Zonggui Wu, Jun Li, Xuepeng Cao, Haifan Hu, Jianping Gu, Guangming Xu, Bicheng Liu
  • Patent number: 9966409
    Abstract: An imaging device for electromagnetic radiation, especially for x-ray and/or gamma radiation, is disclosed. In an embodiment, the imaging device includes a layering including a number of detection elements, a number of read-out boards and a base board. Each of the detection elements is electrically contacted with a respective read-out board via a plurality of first solder contacts. Each read-out board includes a plurality of through-contacts and is electrically contacted with the base board via a plurality of second solder contacts.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: May 8, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ludwig Danzer, Miguel Labayen De Inza, Jan Wrege
  • Patent number: 9930280
    Abstract: An imaging and pulse detection (IPD) pixel array includes a plurality of imaging pixels arranged in a plurality of rows and columns. Each imaging pixel includes a respective photodetector that outputs signals in response to incident light and input laser pulses. The signals include imaging signals that correspond to the incident light and pulse signals that correspond to the input laser pulses. The IPD array further includes an isolation circuit associated with each of the respective imaging pixels, each isolation circuit outputting filtered output pulse signals in response to receiving the signals from the associated imaging pixel, the filtered output pulse signals corresponding to the pulse signals. The IPD array further includes a single pulse detection circuit that toggles between a charged and uncharged state corresponding to a pulse being received from at least one of the isolation circuits.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: March 27, 2018
    Assignee: Sensors Unlimited, Inc.
    Inventors: Minlong Lin, Joshua Lund
  • Patent number: 9769400
    Abstract: An imaging pixel is provided. The imaging pixel includes a photodetector that outputs charge signals in response to incident light and laser pulses and a high-frequency path. A detector biasing circuit is further provided that biases high-frequency signals of the charge signals that are associated with the laser pulses to follow the high frequency path. The detector biasing circuit effectively filters low-frequency signal components of the charge signals from following the high-frequency path.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: September 19, 2017
    Assignee: Sensors Unlimited, Inc.
    Inventors: Minlong Lin, Joshua Lund
  • Patent number: 9040930
    Abstract: A particle beam sensor comprising: scattering means providing a surface for intercepting obliquely a path of a particle beam thereby to permit a scattering of particles from the particle beam by the scattering means; sensor means responsive to receipt of one or more said scattered particles to generate a sensor signal; aperture mask means arranged between the scattering means and the sensor means to present to the scattering means a screen opaque to said scattered particles and having at least one aperture through which an unobstructed view of the scattering means is provided to the sensor means, the aperture (s) thereby permitting selection of all of those particles scattered by the scattering means which may be used to form at the sensor means an image representative of at least a part of a foot print cast by the particle beam upon the scattering means. By scattering particles from a sectional area of a particle beam, scattered beam particles can be used more efficiently compared to existing techniques.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: May 26, 2015
    Assignee: THE UNIVERSITY OF MANCHESTER
    Inventors: Nicholas Roberts Kyele, Roelof Gozewijn Van Silfhout
  • Publication number: 20150108359
    Abstract: The invention concerns a method of real-time mapping of a presence distribution of a source of photons in a site, the method comprising the steps consisting of measuring (100), at a plurality of measurement points, a photon flux in an energy band-width determined with a spectrometric detector, and noting the geographical co-ordinates of said point, and, at each measurement point, —from a response function of the detector, and information on the site, establishing a distribution of origins (200) of the photons around the measurement point, —from the distributions, representing (300), on a map of the site, a distribution of origin of photons, the method further comprising, for each measurement point starting from the second, a step (250) prior to the representing step (300), during which the distributions of origins of the photons around the current measurement point are correlated with those of previous measurement points.
    Type: Application
    Filed: June 11, 2013
    Publication date: April 23, 2015
    Inventors: Fabien Panza, Rodolfo Gurrarian
  • Patent number: 9012860
    Abstract: A single-photon receiver is presented. The receiver comprises two SPADs that are monolithically integrated on the same semiconductor chip. Each SPAD is biased with a substantially identical gating signal. The output signals of the SPADs are combined such that capacitive transients present on each output signal cancel to substantially remove them from the output signal from the receiver.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: April 21, 2015
    Assignee: Princeton Lightwave, Inc.
    Inventors: Bruce Mitchell Nyman, Mark Allen Itzler
  • Patent number: 9006673
    Abstract: An X-ray analysis apparatus converts an X-ray intensity distribution of discrete data determined for each pixel, from a first plane where the distribution is known into a second plane where the distribution is not known. The X-ray analysis apparatus projects onto the second plane, a grid point which specifies a pixel on the first plane and an intermediate point between the grid points, as nodes, calculates an area of a region where a polygon expressing a projected pixel specified by the projected nodes overlaps with each pixel on the second plane, to thereby calculate an occupancy ratio of the polygon expressing the projected pixel to each pixel on the second plane and distributes X-ray intensity in the pixel on the first plane to the pixel on the second plane based on the occupancy ratio, to thereby convert the X-ray intensity distribution.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: April 14, 2015
    Assignee: Rigaku Corporation
    Inventors: Kazuki Ito, Yoshinori Ueji, Koichi Kajiyoshi, Kunio Nishi
  • Patent number: 8981313
    Abstract: A method is provided for detecting x-ray quanta incident on a multi-pixel x-ray detector having a two-dimensional matrix composed of measurement-signal-generating pixels, wherein the multi-pixel x-ray detector is embodied as a direct solid-state detector, wherein the pixels, which generate a measurement signal within a predefined time interval and which in addition lie in a contiguous cluster composed of a plurality of pixels, are assigned to an event cluster by an evaluation unit and wherein their measurement signals are drawn upon for the purpose of approximating the position at which the x-ray quantum interacted with the multi-pixel x-ray detector.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: March 17, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Franz Atzinger, Gerhard Hahm, Raphael Henrich, Carsten Illenseer, Christoph Jablonski, Bernhard Sandkamp, Markus Schild, Michael Stark, Fabian Wloka
  • Patent number: 8969820
    Abstract: A radiographic apparatus includes an X-ray detection sensor having a two-dimensional detector plane for detecting an intensity distribution of X-rays, a body internally containing the X-ray detection sensor, a supporting member having a supporting surface for supporting the X-ray detection sensor across the detector plane and which fixes the X-ray detection sensor to an inner bottom surface of the body, and a circuit board on which is mounted a circuit for reading out a detection signal from the X-ray detection sensor. Furthermore, in the radiographic apparatus, the supporting member forms a space between the supporting member and the inner bottom surface of the body in a peripheral portion of the supporting member. At least a part of the circuit board is arranged in the space.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: March 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidetomo Suwa, Akio Saigusa, Tetsuo Watanabe
  • Patent number: 8927937
    Abstract: A detector array (110) includes a detector (112) configured to detect ionizing radiation and output a signal indicative of the detected radiation, wherein the detector at least includes a semiconductor element (118) and an illumination subsystem (120) configured to generate and transfer sub-band-gap illuminating radiation to selectively illuminate only a sub-portion of the semiconductor element in order to produce a spatially patterned illumination distribution inside the element.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: January 6, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Alexander Schwarzman, Naor Wainer, Amir Livne
  • Publication number: 20140332692
    Abstract: The invention relates to a semiconductor drift detector for detecting radiation, comprising a semiconductor substrate (HS), in which signal charge carriers are generated during operation, to be precise by incident photons (h·f) having a specific photon energy, more particularly in the form of X-ray fluorescent radiation, and/or by incident electrons (?), having a specific signal charge carrier current, more particularly in the form of back-scattered electrons (?), and comprising a read-out anode (A) for generating an electrical output signal in a manner dependent on the signal charge carriers, and comprising an erase contact (RC) for erasing the signal charge carriers that have accumulated in the semiconductor substrate (HS).
    Type: Application
    Filed: June 18, 2012
    Publication date: November 13, 2014
    Applicants: PNSENSOR GMBH, PNDETECTOR GMBH
    Inventors: Gerhard Lutz, Heike Soltau, Adrian Niculae
  • Publication number: 20140264050
    Abstract: An electronic device to simply and efficiently measure energy of incident photons in a very short time and with a very high count rate and high precision, starting from current pulses from an ionizing electromagnetic radiation detector, the electronic device including an analog delay line with switched capacitors with controlled loss at an output from a charge preamplifier.
    Type: Application
    Filed: October 4, 2012
    Publication date: September 18, 2014
    Applicant: Commissariat a l'energie atomique et aux ene alt
    Inventors: Jean-Pierre Rostaing, Patrice Ouvrier-Buffet
  • Patent number: 8772727
    Abstract: The application describes an X-ray detector for use in a medical equipment, wherein the detector comprises an unit for transforming X-ray radiation into electrical charge, a first capacitor for being charged by an electrical charge, wherein the first capacitor is electrically connected to the unit for transforming, a second capacitor for being charged by an electrical charge, and a first gain switching gate, wherein the second capacitor is electrically connected with the unit for transforming if the first gain switching gate is in on-state, wherein the detector is adapted to switch on the first gain switching gate for short periods. Further the application describes an X-ray system comprising a detector according to the invention, wherein the system is adapted for gain selection, wherein the detector is adapted to switch on the first gain switching gate for short periods.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: July 8, 2014
    Assignee: Trixell
    Inventors: Walter Ruetten, Rainer Kiewitt, Olaf Wischhusen
  • Publication number: 20140175291
    Abstract: A spatially-aware radiation probe system/method allowing for detection and correction of radiation readings based on the position and/or movement of a radiation detector is disclosed. The system incorporates a radiation detector combined with a spatially-aware sensor to permit detection of spatial context parameters associated with the radiation detector and/or object being probed. This spatial context information is then used by analysis software to modify the detected radiation values and/or instruct the radiation probe operator as to appropriate measurement activity to ensure accurate radiation measurements. The spatially-aware sensor may include but is not limited to: distance sensors to determine the distance between the radiation detector and the object being monitored; accelerometers integrated within the radiation detector to detect movement of the radiation detector; and/or axial orientation sensors to determine the axial orientation of the radiation detector.
    Type: Application
    Filed: January 25, 2013
    Publication date: June 26, 2014
    Applicant: Canberra Industries, Inc.
    Inventors: Olivier Gaëtan Giarmana, Archibald Dupont, Frederic Pierre Henri Meyer, Damien du Bouëtiez de Kerorguen
  • Patent number: 8759784
    Abstract: A high-energy radiation detector apparatus, comprising a high-energy radiation detector substrate and a plurality of charge collection electrodes operatively coupled to first and second opposing sides of the detector substrate is disclosed. Charge collection circuitry is associated with the plurality of charge collection electrodes for collecting charge induced on the charge collection electrodes by a high energy radiation photon interaction event caused by high-energy radiation incident on the detector substrate.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: June 24, 2014
    Assignee: Radiation Watch Limited
    Inventors: David Prendergast, Michael Anderson, Russell Morgan
  • Patent number: 8729485
    Abstract: Embodiments of the present invention provide a computer-implemented method for parallel readout for an X-ray image sensor module having a pixel array. Specifically, among other things, embodiments of the present invention provide a computer-implemented infrastructure comprising: generating a pixel data for each pixel within a respective pixel row of the pixel array based on a photon count; receiving a first serial pixel data, wherein the first serial pixel data comprises pixel data from a plurality of pixels of a first column; receiving a second serial pixel data, wherein the second serial pixel data comprises pixel data from a plurality of pixels of a second column; and shifting the first serial pixel data from the first column register to the second column register.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: May 20, 2014
    Assignee: Luxen Technologies, Inc.
    Inventors: Myung-Jin Soh, Seul-Yi Soh
  • Publication number: 20140131585
    Abstract: An X-ray image pickup system includes an X-ray image pickup apparatus having a sensor unit having photoelectric conversion elements arranged in a two-dimensional matrix form, the sensor unit configured to acquire an electric signal corresponding to the intensity of an X-ray generated from an X-ray source by the photoelectric conversion elements and output electric signals as pixel data, an electric circuit configured to perform processing including driving the sensor unit, wiring configured to mutually connect the sensor unit and the electric circuit, and one or more loop circuits each having a loop-shaped conductor and being connected to at least one of an internal component of the electric circuit and the wiring, and a selection unit configured to perform at least one of selection of a loop circuit to be connected among the loop circuits and selection of a state of the loop circuit to be connected.
    Type: Application
    Filed: November 6, 2013
    Publication date: May 15, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Toshiya Ishioka
  • Patent number: 8680496
    Abstract: A system for sanitizing an enclosed structure has a plurality of sensors, a germicidal ultraviolet light source, and a controller. A first sensor detects the presence of humans or animals within the enclosed structure, and a second sensor detects the position of at least one door of the enclosed structure. The ultraviolet light source provides electromagnetic radiation in the ultraviolet range. The controller receives inputs from the first and second sensors and instructs emission or cessation of emission of the electromagnetic radiation based on the received input.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: March 25, 2014
    Assignee: Elevated Health Systems, LLC
    Inventor: David G. Leben
  • Patent number: 8633447
    Abstract: An FPD has plural pixels arranged in two dimensions. The pixels include a short pixel directly connected to a signal line, and a comparative pixel connected to another signal line through a TFT. In irradiation detecting operation, a control section monitors a voltage signal from the short pixel. When the voltage signal is a predetermined threshold value or more, the control section detects the start of X-ray irradiation, and provisionally starts charge accumulation operation. Then, the control section calculates the difference in the voltage signal between the short pixel and the comparative pixel. When this difference is another threshold value or more, the detection of the start of X-ray irradiation is judged to be valid. When the difference is less than the threshold value, the detection is judged to be misdetection caused by shock noise. The charge accumulation operation is aborted, and the irradiation detecting operation is restarted.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: January 21, 2014
    Assignee: FUJIFILM Corporation
    Inventor: Keita Watanabe
  • Publication number: 20130334434
    Abstract: A single-photon receiver is presented. The receiver comprises two SPADs that are monolithically integrated on the same semiconductor chip. Each SPAD is biased with a substantially identical gating signal. The output signals of the SPADs are combined such that capacitive transients present on each output signal cancel to substantially remove them from the output signal from the receiver.
    Type: Application
    Filed: May 10, 2013
    Publication date: December 19, 2013
    Applicant: Princeton Lightwave, Inc.
    Inventors: Bruce Mitchell Nyman, Mark Allen Itzler
  • Publication number: 20130281302
    Abstract: The present invention introduces a detector that is able to detect single microwave photons propagating in a waveguide. The waveguide of the invention is lowered to a temperature where it becomes superconductive. Disposed between a middle wire and a ground plane of the waveguide is a very small piece of a desired normal metal, whereby so-called SN contacts are formed between these materials. A separate reflection measurement circuit is coupled to the normal metal piece. When the impedance of the waveguide is matched to the impedance of the normal metal piece as well as possible, a photon propagating in the waveguide is most likely absorbed in the normal metal. The absorption slightly raises the temperature of the piece, which further changes the impedance observed in a so-called SIN junction between the reflection measurement circuit and the piece.
    Type: Application
    Filed: September 20, 2011
    Publication date: October 24, 2013
    Applicant: Aalto-Korkeakoulusäätiö
    Inventors: Mikko Möttönen, Jukka Pekola
  • Patent number: 8558180
    Abstract: Among other things, one or more systems and/or techniques for integrating electrical charge yielded from an indirect conversion detector array of a pulsating radiation system are provided. The integration begins during a resting period between a first and second pulse and ends before the second pulse is emitted. Electrical charge that is measured during a resting period is integrated, while electrical charge measured during a pulse is not integrated. In this way, parasitic contributions caused by the direct interaction of radiation photons with a photodiode are reduced and a quantum efficiency of the indirect conversion detector array is increased, for example. Moreover, the period of integration can be adjusted such that a voltage gain related to the indirect conversion detector array can be varied to a predetermined level.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: October 15, 2013
    Assignee: Analogic Corporation
    Inventors: Ruvin Deych, Charles Shaughnessy
  • Publication number: 20130266114
    Abstract: A radiation detector includes a semiconductor substrate having opposing front and rear surfaces, a cathode electrode located on the front surface of the semiconductor substrate configured so as to receive radiation, and a plurality of anode electrodes formed on the rear surface of said semiconductor substrate. A work function of the cathode electrode material contacting the front surface of the semiconductor substrate is lower than a work function of the anode electrode material contacting the rear surface of the semiconductor substrate.
    Type: Application
    Filed: June 5, 2013
    Publication date: October 10, 2013
    Inventors: Henry CHEN, Salah AWADALLA, Pinghe LU, Pramodha MARTHANDAM
  • Publication number: 20130256547
    Abstract: Embodiments of the present invention provide a computer-implemented method for determining an amplification gain for an X-ray image sensor module. Specifically, among other things, embodiments of the present invention provide a computer-implemented infrastructure comprising: capturing an electrical signal by a pixel sensor; and determining an amplification gain of the electrical signal at a charge sensitive amplifier by turning a switch on or off, wherein the switch connects the pixel sensor to a capacitor.
    Type: Application
    Filed: March 28, 2012
    Publication date: October 3, 2013
    Applicant: LUXEN TECHNOLOGIES, INC.
    Inventors: Myung-Jin Soh, Seul-Yi Soh
  • Publication number: 20130256546
    Abstract: A demodulation sensor (30) is described for detecting and demodulating a modulated radiation field impinging on a substrate (31). The sensor comprises the means (1,7,15) for generating, in the substrate, a static majority current assisted drift (Edrift) field, at least one gate structure (33) for collecting and accumulating minority carriers (21), the minority carriers generated in the substrate by the impinging radiation (28) field. The at least one gate structure comprises at least two regions (4,9,18) for the collection and accumulation of the minority carriers (21) and at least one gate (5,6,8) adapted for inducing a lateral electric drift field under the gate structure, the system thus being adapted for directing the minority carriers (21) towards one of the at least two regions (4,9) under influence of the static majority current assisted drift field and the lateral electric drift field induced by the at least one gate, and a means for reading out the accumulated minority carriers in that region.
    Type: Application
    Filed: December 6, 2011
    Publication date: October 3, 2013
    Applicant: MELEXIS TECHNOLOGIES NV
    Inventors: Volodymyr Seliuchenko, Maarten Kuijk
  • Patent number: 8546765
    Abstract: An x-ray detector and its pixel circuit are described, that allow to cover a large dynamic range with automatic selection of the sensitivity setting in each pixel, thus providing improved signal to noise ratio with all exposure levels. X-ray detectors are required to cover a large dynamic range. The largest exposure determines the required pixel capacitance. However, a large pixel capacitance gives a bad signal to noise ratio with small exposures e.g. in the dark parts of the image. This invention disclosure describes several approaches to provide automatic sensitivity selection in the pixels. This ensures that low signals are stored in a small capacitor or read out with a high sensitivity with corresponding good signal to noise ratio, while larger signals are stored in larger capacitors or are read out with lower sensitivity so that no information is lost.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: October 1, 2013
    Assignee: Trixell
    Inventors: Walter Ruetten, Lex Alving, Thomas Frederik Buss, Tiemen Poorter, Peter Bas Anton Wolfs
  • Publication number: 20130228694
    Abstract: A radiographic imaging device that may detect irradiation states of radiation is provided. Pixels for radiation detection that are provided in a radiation detector of an electronic cassette are configured with characteristics thereof being alterable. The characteristics are set in accordance with the imaging conditions of a radiation image by a cassette control section of the electronic cassette.
    Type: Application
    Filed: April 18, 2013
    Publication date: September 5, 2013
    Applicant: FUJIFILM CORPORATION
    Inventors: Haruyasu NAKATSUGAWA, Yasunori OHTA, Naoyuki NISHINO, Naoto IWAKIRI
  • Publication number: 20130214169
    Abstract: Embodiments of the present invention provide a computer-implemented method for parallel readout for an X-ray image sensor module having a pixel array. Specifically, among other things, embodiments of the present invention provide a computer-implemented infrastructure comprising: generating a pixel data for each pixel within a respective pixel row of the pixel array based on a photon count; receiving a first serial pixel data, wherein the first serial pixel data comprises pixel data from a plurality of pixels of a first column; receiving a second serial pixel data, wherein the second serial pixel data comprises pixel data from a plurality of pixels of a second column; and shifting the first serial pixel data from the first column register to the second column register.
    Type: Application
    Filed: February 17, 2012
    Publication date: August 22, 2013
    Applicant: LUXEN TECHNOLOGIES, INC.
    Inventors: Myung-Jin Soh, Seul-Yi Soh
  • Publication number: 20130193336
    Abstract: An apparatus and process is provided to illustrate the manipulation of the internal electric field of CZT using multiple wavelength light illumination on the crystal surface at RT. The control of the internal electric field is shown through the polarization in the IR transmission image under illumination as a result of the Pockels effect.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 1, 2013
    Applicants: Fisk University, Savannah River Nuclear Solutions, LLC
    Inventors: Aaron L. Washington, II, Martine C. Duff, Lucile C. Teague, Arnold Burger, Michael Groza
  • Patent number: 8497463
    Abstract: A device for counting photons includes a detector unit that is configured to generate an detected signal. A switching unit is configured to be impinged upon by the detected signal and to trigger a switching state for each detection pulse so as to generate a state signal. A sampling unit is configured to sample the state signal at a predetermined sampling frequency. A serial-parallel converter unit is configured to parallelize the serially generated sampled data by grouping successive sampled data into a sampled data packet. An evaluation unit is configured to evaluate the binary values of sampled data packets so as to identify a partial counter result indicating the number of switching state changes occurring in the switching unit, and to add partial counter results identified in individual clock cycles.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: July 30, 2013
    Assignee: Leica Microsystems CMS GmbH
    Inventor: Bernd Widzgowski
  • Publication number: 20130170615
    Abstract: A radiation detector is provided that provides fast sequential image acquisition. In one embodiment, the radiation detector a diode capacitor that is charged in response to a radiation exposure event. The charge stored in the diode capacitor is transferred to a separate storage capacitor, allowing a new charge to be generated and stored at the diode capacitor.
    Type: Application
    Filed: December 28, 2011
    Publication date: July 4, 2013
    Applicant: General Electric Company
    Inventors: Ching-Yeu Wei, Jeffrey Wayne Eberhard, George Edward Possin
  • Patent number: 8476597
    Abstract: When all TFTs are turned on, an electric signal is compared with a first threshold value. If the electric signal is equal to or more than the first threshold value, a first judgment unit judges that X-ray irradiation has been started. A second judgment unit compares second and third threshold values with a first-order differentiation value of an electric signal that is outputted in a state of turning off all the TFTs. If the first-order differentiation value is within or out of a range defined by the second and third threshold values throughout a verification period, the second judgment unit verifies that the judgment of the first judgment unit is correct. When the judgment of the first judgment unit is verified to be correct, the TFTs are kept turned off, and an FPD continuously carries out charge accumulation operation for capturing an X-ray image.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: July 2, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Takeshi Kuwabara
  • Patent number: 8466425
    Abstract: A chalcogenide glass radiation sensor comprising a chalcogenide glass layer coupled to at least two electrodes and a metal source, and a method using the same are disclosed. The chalcogenide glass layer has a resistivity and the at least two electrodes are configured to facilitate the measurement of the resistivity of the chalcogenide glass layer. The coupling of the metal source and the chalcogenide glass layer is such that the resistivity of the chalcogenide glass layer changes upon exposure to ionizing radiation. The metal source is configured to be external to an electric field that may form between the at least two electrodes as the resistivity of the chalcogenide glass layer is measured.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: June 18, 2013
    Assignee: Boise State University
    Inventors: Maria Mitkova, Darryl P. Butt
  • Publication number: 20130134317
    Abstract: A detector and a method for the detection of ionising radiation are proposed. The detector (1) exhibits a detector body (2) made from a semiconductor material in which incident ionising radiation generates free electron-hole pairs, a cathode side (4) of the detector body (2) to which the free holes generated drift in an electric field, an anode side (3) of the detector body (2) to which the free electrons generated drift in an electric field, at least two electrodes (5, 6) on the anode side (3) and at least two electrodes (7, 8) on the cathode side (4). There is a potential difference between the electrodes (5, 6, 7, 8). The potential difference between the individual electrodes (7, 8) on the cathode side (4) is smaller than the potential difference between each of the electrodes (5, 6) on the anode side (3) on the one hand and each of the electrodes (7, 8) on the cathode side (4) on the other hand.
    Type: Application
    Filed: November 23, 2012
    Publication date: May 30, 2013
    Applicant: ALBERT-LUDWIGS-UNIVERSITAET FREIBURG
    Inventor: Albert-Ludwigs-Universitaet Freiburg
  • Publication number: 20130099127
    Abstract: A method is provided for detecting x-ray quanta incident on a multi-pixel x-ray detector having a two-dimensional matrix composed of measurement-signal-generating pixels, wherein the multi-pixel x-ray detector is embodied as a direct solid-state detector, wherein the pixels, which generate a measurement signal within a predefined time interval and which in addition lie in a contiguous cluster composed of a plurality of pixels, are assigned to an event cluster by an evaluation unit and wherein their measurement signals are drawn upon for the purpose of approximating the position at which the x-ray quantum interacted with the multi-pixel x-ray detector.
    Type: Application
    Filed: October 24, 2012
    Publication date: April 25, 2013
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Siemens Aktiengesellschaft
  • Patent number: 8424764
    Abstract: Disclosed herein is a photoelectric conversion device having unit pixels arranged in a matrix, each of the unit pixels including: a photoelectric conversion element; a source follower readout transistor configured to receive a signal charge arising from photoelectric conversion by the photoelectric conversion element by a gate, and read out an electrical signal dependent on the signal charge; and a correction circuit configured to reset gate potential of the readout transistor to Vref+Vth prior to signal readout by the readout transistor, if a reference potential given to the gate of the readout transistor is defined as Vref and threshold voltage of the readout transistor is defined as Vth.
    Type: Grant
    Filed: May 31, 2010
    Date of Patent: April 23, 2013
    Assignee: Sony Corporation
    Inventors: Tsutomu Tanaka, Michiru Senda
  • Patent number: 8426828
    Abstract: A pixel for the detection of electromagnetic radiation or high energy particles or charge packets, in particular for detecting X-ray photons, comprises a radiation receptor for converting the radiation into a sensing signal, the pixel being adapted for performing both pulse detection and integration of the same sensing signal.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: April 23, 2013
    Assignees: Caeleste CVBA
    Inventor: Bart Dierickx
  • Patent number: 8421022
    Abstract: A microdosimeter, comprising an array of three-dimensional p-n junction semiconductor detectors, each providing a sensitive volume-target and a tissue equivalent medium for generating secondary charged particles. The array is manufactured from a semiconductor on insulator wafer and the detectors are located to detect secondary charged particles generated in the tissue equivalent medium.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: April 16, 2013
    Assignee: University of Wollongong
    Inventor: Anatoly Rozenfeld
  • Publication number: 20130082185
    Abstract: A chalcogenide glass radiation sensor comprising a chalcogenide glass layer coupled to at least two electrodes and a metal source, and a method using the same are disclosed. The chalcogenide glass layer has a resistivity and the at least two electrodes are configured to facilitate the measurement of the resistivity of the chalcogenide glass layer. The coupling of the metal source and the chalcogenide glass layer is such that the resistivity of the chalcogenide glass layer changes upon exposure to ionizing radiation. The metal source is configured to be external to an electric field that may form between the at least two electrodes as the resistivity of the chalcogenide glass layer is measured.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Inventors: Maria Mitkova, Darryl P. Butt
  • Patent number: 8410450
    Abstract: An apparatus for detecting X-rays and a driving method of the X-ray detecting apparatus. The driving method includes sampling a first data voltage corresponding to a rheobase voltage and a bias voltage, the rheobase voltage being generated by a current from a photodiode, sampling a second data voltage corresponding to the bias voltage after resetting the rheobase voltage, and resetting the rheobase voltage from the time that the sampling of the second data voltage is finished to the time that a corresponding frame is finished. An image delay generated when an X-ray motion picture is displayed may be minimized.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: April 2, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Kwan-Wook Jung
  • Patent number: 8405037
    Abstract: A radiation detector of this invention includes a Cl-doped CdTe or Cl-doped CdZnTe polycrystalline semiconductor film in which defect levels in crystal grains are protected. This is obtained by grinding CdTe or CdZnTe crystal doped with Cl, and preparing the polycrystalline semiconductor film again by using its powder as the source. The defect levels of crystal grain boundaries in the polycrystalline semiconductor film are also protected by further doping the polycrystalline semiconductor film prepared again with Cl. These features enable manufacture of the radiation detector which has excellent sensitivity and response to radiation.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: March 26, 2013
    Assignees: Shimadzu Corporation, Institute of National Colleges of Technology, Japan
    Inventors: Satoshi Tokuda, Hiroyuki Kishihara, Masatomo Kaino, Tamotsu Okamoto
  • Publication number: 20130068955
    Abstract: A control device that controls a sensor capable of changing a magnitude of an accumulation capacitance of an electric charge for each pixel includes an acquisition unit configured to acquire an output value according to an accumulated electric charge of each pixel of the sensor, a determination unit configured to determine whether the accumulation capacitance of each pixel is saturated based on the output value, and a setting unit configured to set magnitude of the accumulation capacitance for each pixel according to the determined accumulation capacitance.
    Type: Application
    Filed: August 21, 2012
    Publication date: March 21, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Tomohiko Matsuura
  • Patent number: 8395126
    Abstract: An X-ray imaging apparatus includes an image capture unit including a plurality of pixels for imaging X-ray radiation, a first correction unit configured to correct an output value of an unsaturated pixel among the plurality of pixels, and a second correction unit configured to correct an output value of a saturated pixel among the plurality of pixels. The second correction unit corrects the saturated pixel based on an output value of the unsaturated pixel corrected by the first correction unit and located within a predetermined distance from the saturated pixel.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: March 12, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Naoto Takahashi
  • Patent number: 8389945
    Abstract: An apparatus for capturing images of a target object having a barcode. The apparatus includes a reflector, an LED emitting mostly invisible light, and a photodetector. The LED is configured to emit a first portion of the invisible light toward the target object directly and to emit a second portion of the invisible light toward the reflector. The reflector is configured to redirect at least some of the second portion of the invisible light toward the target object. The photodetector is configured to detect returned invisible light from the target object to generate an electrical signal.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: March 5, 2013
    Assignee: Symbol Technologies, Inc.
    Inventors: Igor R. Vinogradov, Robert W. DiGiovanna, Yuly Mitelman
  • Patent number: 8378308
    Abstract: A radiation detector is disclosed. The radiation detector comprises an active detector surface configured to generate charge carriers in response to charged particles associated with incident radiation. The active detector surface is further configured with a sufficient thickness for a partial energy deposition of the charged particles to occur and permit the charged particles to pass through the active detector surface. The radiation detector further comprises a plurality of voltage leads coupled to the active detector surface. The plurality of voltage leads is configured to couple to a voltage source to generate a voltage drop across the active detector surface and to separate the charge carriers into a plurality of electrons and holes for detection. The active detector surface may comprise one or more graphene layers. Timing data between active detector surfaces may be used to determine energy of the incident radiation. Other apparatuses and methods are disclosed herein.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: February 19, 2013
    Assignee: Battelle Energy Alliance, LLC
    Inventors: David W. Gerts, Robert S. Bean, Richard R. Metcalf
  • Publication number: 20130009068
    Abstract: The present invention discloses a radiation detector, an imaging device and an electrode structure thereof, and a method for acquiring an image. The radiation detector comprises: a radiation sensitive film, a top electrode on the radiation sensitive film, and an array of pixel units electrically coupled to the radiation sensitive film. Each pixel unit comprises: a pixel electrode (which is configured to collect a charge signal in a pixel area of the radiation sensitive film), a storage capacitor, a reset transistor, a buffer transistor, a column strobe transistor, and a row strobe transistor. The column strobe transistor and the row strobe transistor are connected in series between the buffer transistor and the signal line, and transfer the voltage signal of the corresponding pixel unit in response to a column strobe signal and a row strobe signal. The radiation detector may be used for, for example, X-ray digital imaging.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 10, 2013
    Applicant: NUCTECH COMPANY LIMITED
    Inventors: Lan Zhang, Zhiqiang Chen, Ziran Zhao, Wanlong Wu, Yuanjing Li, Zhi Deng, Xiaocui Zheng
  • Patent number: RE45493
    Abstract: An image sensor system using offset analog to digital converters. The analog to digital converters require a plurality of clock cycles to carry out the actual conversion. These conversions are offset in time from one another, so that at each clock cycle, new data is available. A CMOS image sensor converts successive analog signals, representing at least a portion of an image, into successive digital signals using an analog to digital circuit block. Multiple clock cycles may be used by the circuit block to fully convert an analog signal into a corresponding digital signal. The conversion of one analog signal into a corresponding digital signal by the circuit block may be offset in time and partially overlapping with the conversion of a successive analog signal into its corresponding successive digital signal by the circuit block.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: April 28, 2015
    Assignee: Round Rock Research, LLC
    Inventors: Eric R. Fossum, Sandor L. Barna