Position Sensitive Detection System Patents (Class 250/370.1)
  • Patent number: 10955570
    Abstract: An apparatus suitable for detecting X-ray is disclosed. In one example, the apparatus comprises an X-ray absorption layer comprising a first pixel and a second pixel, and a controller. The controller is configured for determining that carriers generated by a single X-ray photon are collected by the first pixel and the second pixel. The controller is also configured for determining energy of the single X-ray photon based on a first voltage detected from the first pixel and a second voltage detected from the second pixel. The first voltage and the second voltage are caused by the single X-ray photon.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: March 23, 2021
    Assignee: SHENZHEN XPECTVISION TECHNOLOGY CO., LTD.
    Inventors: Peiyan Cao, Yurun Liu
  • Patent number: 10677942
    Abstract: An apparatus suitable for detecting X-ray is disclosed. In one example, the apparatus comprises an X-ray absorption layer comprising a first pixel and a second pixel, and a controller. The controller is configured for determining that carriers generated by a single X-ray photon are collected by the first pixel and the second pixel. The controller is also configured for determining energy of the single X-ray photon based on a first voltage detected from the first pixel and a second voltage detected from the second pixel. The first voltage and the second voltage are caused by the single X-ray photon.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: June 9, 2020
    Assignee: SHENZHEN XPECTVISION TECHNOLOGY CO., LTD.
    Inventors: Peiyan Cao, Yurun Liu
  • Patent number: 10591616
    Abstract: A one-dimensional multi-element photo detector includes a photodiode array with a first upper row of photodiode pixels and a second lower row of photodiode pixels. The photodiode array is part of the photo detector. A scintillator array includes a first upper row and a second lower row of scintillator pixels. The first upper and second lower rows of scintillator pixels are respectively optically coupled to the first upper and second lower rows of photodiode pixels. The photo detector also includes readout electronics, which are also part of the photo detector. Electrical traces interconnect the photodiode pixels and the readout electronics.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: March 17, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Rodney A. Mattson, Randall P. Luhta, Marc A. Chappo
  • Patent number: 10502679
    Abstract: A compact spectrometer system comprising an improved detector is provided herein. The spectrometer system herein disclosed can comprises a filter, a Fourier transform optical element, and a detector. The detector can comprise a custom detector having a shape that corresponds to the pattern of light incident on the detector. The custom detector may comprise a plurality of separate detection areas, each area configured to detect a portion of the light pattern incident on the detector. The custom detector may comprise a material capable of detecting wavelengths in the short-wavelength infrared (SWIR) range. The custom detector may be configured to require a relatively low number of electrical connections such that it may be implemented using standard, low-cost electronic packaging techniques. An improved, custom detector as described herein can provide the functionality of a two-dimensional pixel array detector while being relatively simple and inexpensive to manufacture.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: December 10, 2019
    Assignee: VERIFOOD, LTD.
    Inventor: Ori Aphek
  • Patent number: 10429525
    Abstract: A method for correcting PET data includes acquiring first PET data at a time interval. The method also includes acquiring a first normalization coefficient corresponding to the first PET data. The method also includes determining a scale factor based at least partially on the first normalization coefficient. The method also includes determining second PET data based on the first PET data, the scale factor, and the second normalization coefficient. The method also includes determining a first dead time correction coefficient corresponding to the second PET data. The method also includes determining third PET data based on the second PET data and the first dead time correction coefficient. The method further includes reconstructing a first image based on the third PET data.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: October 1, 2019
    Assignee: SHENZHEN UNITED IMAGING HEALTHCARE CO., LTD.
    Inventor: Xiaoxia Dong
  • Patent number: 10359519
    Abstract: A nuclear medicine diagnostic apparatus according to an embodiment includes a scintillator configured to be formed of a single crystal and convert a gamma ray into light; a plurality of photodetectors configured to be arranged on different faces or tangents of the scintillator and each of which is configured to output an electric signal in response to incidence of the light resulting from the converting by the scintillator; storage circuitry configured to store, in advance, correspondence information in which each position in the scintillator is associated with a first intensity distribution indicating intensities of the electric signals that are output by the respective photodetectors; and specifying circuitry configured to specify a conversion position in which the gamma ray that is emitted from the subject is converted into the light in the scintillator by using the correspondence information and a second intensity distribution indicating the intensities of the electric signals.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: July 23, 2019
    Assignee: Canon Medical Systems Corporation
    Inventor: Manabu Teshigawara
  • Patent number: 10218863
    Abstract: An information processing apparatus includes a sonic wave output unit that outputs a sonic wave. A horn restricts an output direction of the sonic wave output from the sonic wave output unit. A cover member is provided on the sonic wave output unit, wherein a region on the cover member corresponding to an opening of the horn is provided with a horizontally arranged slit having a width equal to or larger than a horizontal width of the opening.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: February 26, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junnosuke Yokoyama, Manabu Hada, Yusuke Horishita, Michio Fukushima
  • Patent number: 10128399
    Abstract: A lateral-effect position-sensing detector includes a second lateral-current collector layer, an electron barrier layer on the second lateral-current collector layer, an absorber layer on the electron barrier layer, a first lateral-current collector layer on the absorber layer, and a first elongate electrical contact and a second elongate electrical contact on each of the lateral-current collector layers. Incident light radiates a transparent first lateral-current collector layer to be absorbed by the undepleted absorber layer where electron and holes are generated. The depleted electron barrier layer prevents a flow of electrons from the absorber layer to the second lateral-current collector layer but allows electrons to flow to the second lateral-current collector layer. The lateral-effect position-sensing detector is sensitive to a lateral position between the first elongate electrical contact and the second elongate electrical contact of incident light on each of the lateral-current collector layer.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: November 13, 2018
    Assignee: HRL Laboratories, LLc
    Inventor: Daniel Yap
  • Patent number: 10101475
    Abstract: A system (10) and a method (100) compensate for one or more dead pixels in positron emission tomography (PET) imaging. A pixel compensation processor receives PET data describing a target volume of a subject. The PET data is missing data for one or more dead pixels. The pixel compensation estimates PET data for the dead pixels from the received PET data.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: October 16, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Thomas Leroy Laurence, Sharon Xiaorong Wang
  • Patent number: 10070072
    Abstract: A system for detecting high-energy photons includes a pixelated image detector exposed to visible light and high-energy photons, and the pixelated image detector generates one or more images from the exposure to the visible light and high-energy photons. The system further includes one or more processors operably connected to the pixelated image detector and configured to perform operations on the one or more images to discriminate between visible light and high-energy photons. A method for detecting high-energy photons includes exposing a pixelated image detector to visible light and high-energy photons and discriminating between the visible light that interacts with the pixelated image detector and the high-energy photons that interact with the pixelated image detector.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: September 4, 2018
    Assignee: Savannah River Nuclear Solutions, LLC
    Inventors: Kenneth M. Gibbs, Monica H. Phillips
  • Patent number: 9364187
    Abstract: A CT system includes a gantry having an opening for receiving an object to be scanned, an x-ray tube attached to the gantry, and a detector assembly. The detector assembly is positioned to receive x-rays that pass through the object and includes a light-sealed enclosure formed by at least first and second rails, a back support, and a light seal structure, and a plurality of liquid-cooled modules positioned in the enclosure. Each module includes a digital cable that passes from inside the enclosure, and each module is configured to convert the x-rays to a digital signal and output the signal via a digital cable.
    Type: Grant
    Filed: May 3, 2014
    Date of Patent: June 14, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Joseph Lacey
  • Patent number: 9360568
    Abstract: Measurements of electric charges obtained by the impact of ionizing radiation on a semiconductor detector are grouped in a histogram. Calibrations and data otherwise obtained are used to obtain acceptance probabilities of measurements, which are used to construct a histogram of events by weighting the measurements so as to exclude the influence of some factors (such as diffused radiation) or on the contrary to enhance this influence.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: June 7, 2016
    Assignee: Commissariat a l'Energie Atomique et Aux Energies Alternatives
    Inventors: Guillaume Montemont, Thomas Bordy, Eric Gros D'Aillon
  • Patent number: 9297912
    Abstract: The present invention relates to a pixel detector (10), comprising a semiconductor sensor layer (12), in which charges can be generated upon interaction with particles to be detected. The semiconductor layer defines an X-Y-plane and has a thickness extending in Z-direction. The detector further comprises a read-out electronics layer (14) connected to said semiconductor layer (12), said read-out electronics layer (14) comprising an array of read-out circuits (20) for detecting signals indicative of charges generated in a corresponding volume of said semiconductor sensor layer (12). The neighboring read-out circuits (20) are connected by a relative timing circuit configured to determine time difference information between signals detected at said neighboring read-out circuits (20).
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: March 29, 2016
    Assignees: CERN—European Organization for Nuclear Resesarch, Friedrich-Alexander-Universitat Erlange-Nurnberg, Czech Technical University in Prague
    Inventors: Michael Campbell, Thilo Michel, Jan Jakubek
  • Patent number: 9268042
    Abstract: A method for determining parameters of a beam. As a part of the disclosed method, a beam is received at an image detection array where charges are generated and collected, at a plurality of pixels. Values associated with at least one of a plurality of parameters of the beam are determined by integrating information supplied from each of the pixels. Feedback is generated that presents the values.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: February 23, 2016
    Assignees: Varian Medical Systems International Ag, Varian Medical Systems Particle Therapy GMBH
    Inventors: Daniel Morf, Juergen Heese
  • Patent number: 9217795
    Abstract: Apparatuses and methods are provided that minimize the effects of dark-current pulses. For example, in one embodiment of the invention, a method is provided where a first pixel is struck (i.e., a primary pixel). Pixels struck within a fixed time frame after the primary pixel is struck are referred to as secondary pixels. After a short fixed time frame has expired, the number of primary and secondary pixels is added. If the count exceeds a threshold, the primary pixel was activated by the first (or early) photon from a true gamma event. If the threshold is not met then it is likely the primary pixel generated a dark pulse that should be ignored.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: December 22, 2015
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Peter Hansen, Michael E. Casey, Stefan B. Siegel
  • Patent number: 9105777
    Abstract: A High Purity Germanium (HPGe) radiation detector has been specially machined to be this invented series multi-chamber coaxial configuration. So extra-large volume HPGe detectors can be easily produced with current available HPGe crystal, and the entire detector body structure can be uniquely optimized in accordance with the exact semiconductor crystal ingot situation so the overall detector can be easier depleted and the photo-induced carriers can be better collected as the signal output. This invention makes extra-large efficiency HPGe gamma ray detectors of 100% to 200%, and maybe even higher efficiency, possible and easier to be produced based on current HPGe crystal supply capability. The invention improves the detector performance for very high energy gamma ray detection especially. The invention could also be applied to any other kind of semiconductor materials if any of them could be purified enough for this application in future.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: August 11, 2015
    Inventors: Yongdong Zhou, Xiao Zhou, Jianhua Wan
  • 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
  • Patent number: 9006674
    Abstract: A radioactive ray detecting apparatus provides for reduction of the dead area or region where radioactive rays cannot be detected, even if disposing the radioactive ray detectors to be dense or crowded. The radioactive ray detecting apparatus satisfies the following relationships, when assuming that distance between semiconductor elements is “XG1”, while the distance from the semiconductor element of one of the radioactive ray detectors up to the semiconductor element of other radioactive ray detectors is “XG2”, and distance between the semiconductor elements alighted in a Y-direction is “YG1”, and a horizontal pitch of a predetermined pixel pitch to be used as the radioactive ray detector is “a” and a vertical pitch thereof is “b”, width of a surface of each of plural numbers of semiconductor elements is “c” and length thereof is “d”, respectively: c=a?(XG1+XG2)/2 d=b?YG1=2e+(n?2)f.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: April 14, 2015
    Assignee: Hitachi Aloka Medical, Ltd.
    Inventors: Juhyun Yu, Naoyuki Yamada, Shinichi Inoue, Akihiro Hiruta, Chihiro Ohkubo
  • Patent number: 8969822
    Abstract: Two and three dimensional position sensing systems and sensors for use in such systems are disclosed. The sensors incorporate linear array sensors and an aperture plate to block light or other radiation from reaching most elements of the sensors. A direction of a radiation source relative is determined based on illuminated sensor elements in each sensor. The sensors are combined in systems to allow the position of a radiation source to be estimated.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: March 3, 2015
    Assignee: Baanto International Ltd.
    Inventors: Avanindra Utukuri, Jonathan Clarke, Stephen McFadyen
  • Publication number: 20150041662
    Abstract: A method for detecting radiation during the examination of a sample (1) comprises the steps of generating the radiation, more particularly X-ray radiation or proton radiation, by means of a source device (10), passing the radiation through the sample (1), and detecting the radiation by means of at least one photoelectric solid-state detector (20) containing a photoconduction section having a predetermined response threshold and a potential well section for taking up free charge carriers. The solid-state detector (20) is a GaN- or GaAs-based semiconductor detector and the potential well section contains a two-dimensional electron gas (2DEG). A setting of the radiation is provided in such a way that the solid-state detector (20) is operated separately from the response threshold of the photoconduction section and in a sensitivity range of the potential well section.
    Type: Application
    Filed: February 15, 2013
    Publication date: February 12, 2015
    Inventors: Stefan Thalhammer, Markus Hofstetter, John Howgate, Martin Stutzmann
  • Patent number: 8930165
    Abstract: A system and method for determining a probability of the location of an illicit radiation source within an environment based on directional detectors. An embodiment includes a plurality of directional radiation detectors distributed about the environment and integrated with a processing unit adapted to determine the probability of the source location based on the radiation count data received from the plurality of detectors. The processing unit is further adapted to output information indicative of the location of the radiation source within the environment.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: January 6, 2015
    Assignee: UChicago Argonne, LLC
    Inventors: Richard B. Vilim, Raymond T. Klann
  • Patent number: 8796623
    Abstract: Disclosed is a radiation imaging device configuring a radiation imaging system. Specifically disclosed is a radiation imaging device wherein external force action mechanisms are capable of applying external force to the peripheral sections of a radiation conversion panel, or applying the external force while being laminated on the radiation conversion panel, or pressing the radiation conversion panel against the inner wall of a panel containing unit, which contains the radiation conversion panel, at least in imaging when radiation is applied.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: August 5, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Haruyasu Nakatsugawa, Naoyuki Nishino, Yasunori Ohta, Naoto Iwakiri
  • 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: 8754378
    Abstract: A photon-counting Geiger-mode avalanche photodiode intensity imaging array includes an array of pixels (200), each having an avalanche photodiode (250). A pixel senses an avalanche event and stores, in response to the sensed avalanche event, a single bit digital value therein. An array of accumulators (320) are provided such that each accumulator is associated with a pixel. A row decoder circuit (310) addresses a pixel row within the array of pixels. A bit sensing circuit (300) converts a precharged capacitance into a digital value during read operations.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: June 17, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Gordian Prescher, Thomas Frach
  • Patent number: 8729486
    Abstract: Detection of ionizing radiation with modulation doped field effect transistors (MODFETs) is provided. There are two effects which can occur, separately or together. The first effect is a direct effect of ionizing radiation on the mobility of electrons in the 2-D electron gas (2DEG) of the MODFET. An ionizing radiation absorption event in or near the MODFET channel can perturb the 2DEG mobility to cause a measurable effect on the device conductance. The second effect is accumulation of charge generated by ionizing radiation on a buried gate of a MODFET. The conductance of the MODFET can be made sensitive to this accumulated charge, thereby providing detection of ionizing radiation. 1-D or 2-D arrays of MODFET detectors can be employed to provide greater detection area and/or spatial resolution of absorption events. Such detectors or detector pixels can be integrated with electronics, such as front-end amplification circuitry.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: May 20, 2014
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Henry M. Daghighian, Peter D. Olcott, Craig S. Levin, Farhad Taghibakhsh
  • Patent number: 8698091
    Abstract: A semiconductor detector device, such as a PIN diode or silicon drift detector, including a substrate with an entrance window. The entrance window comprises a conductive layer, and an insulating layer disposed between the conductive layer and the substrate. The insulating layer and conductive layer cover a center portion of the surface of the substrate.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: April 15, 2014
    Assignee: Moxtek, Inc.
    Inventors: Keith W. Decker, Derek Hullinger, Mark Alan Davis
  • Patent number: 8604772
    Abstract: A sensor assembly for electric field sensing is provided. The sensor assembly may include an array of Micro-Electro-Mechanical System (MEMS)-based resonant tunneling devices. A resonant tunneling device may be configured to generate a resonant tunneling signal in response to the electric field. The resonant tunneling device may include at least one electron state definer responsive to changes in at least one respective controllable characteristic of the electron state definer. The changes in the controllable characteristic are configured to affect the tunneling signal. An excitation device may be coupled to the resonant tunneling device to effect at least one of the changes in the controllable characteristic affecting the tunneling signal. A controller may be coupled to the resonant tunneling device and the excitation device to control the changes of the controllable characteristic in accordance with an automated control strategy configured to reduce an effect of noise on a measurement of the electric field.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: December 10, 2013
    Assignee: General Electric Company
    Inventors: Ertugrul Berkcan, Naresh Kesa Van Rao, Aaron Knobloch
  • Patent number: 8569709
    Abstract: Embodiments of radiographic imaging systems; radiography detectors and methods for using the same can include radiographic imaging array that can include a plurality of pixels that each include a photoelectric thin-film conversion element coupled to a conversion thin-film switching element. In certain exemplary embodiments, a radiographic imaging array can include a bias control circuit to provide a bias voltage to the photosensors for a portion of the imaging array, an address control circuit to control scan lines, where each of the scan lines is coupled to a plurality of pixels in the portion of the imaging array; and a signal sensing circuit connected to data lines, where each of the data lines is coupled to at least two pixels in the portion of the imaging array, where power of the bias control circuit, the address control circuit, and the signal sensing circuit is not removed simultaneously.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: October 29, 2013
    Assignee: Carestream Health, Inc.
    Inventors: Jeff Hsin Chang, Gordon Geisbuesch
  • Patent number: 8530872
    Abstract: In an optical position detecting device, a position detecting section detects the position of a target object on the basis of a result obtained by receiving detection light, which is emitted from a light source section and reflected by the target object, using a light detection section. As seen from an emitting direction of the detection light, the light detection section is located inside a region surrounded by a closed circuit passing through a plurality of the light source sections or inside a region pinched by the plurality of light source sections. The plurality of light source sections has a first light-emitting element, and a second light-emitting element located closer to the light detection section side than the first light-emitting element. The light source driving section alternately turns on the first light-emitting element and the second light-emitting element.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: September 10, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Daisuke Nakanishi, Kanechika Kiyose
  • Patent number: 8519344
    Abstract: A radiation imaging apparatus has a pixel region arranged on a substrate. Arranged in a matrix pattern in the pixel region are pixels, each pixel including a conversion element which converts radiation to electrical charges, and a switching element which is connected to the conversion element therein. The radiation imaging apparatus has, in a region outside the pixel region of the substrate, an intersection at which a signal line connected to the switching element and a bias line connected to the conversion element intersects. At the intersection, a semiconductor layer is arranged between the signal line and the bias line, and a carrier blocking portion is arranged between the semiconductor layer and the signal line.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: August 27, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takamasa Ishii, Chiori Mochizuki, Minoru Watanabe
  • Publication number: 20130206995
    Abstract: The present invention provides a radiation detector for detecting both the intensity and direction of one or more sources of radiation comprising a radiation sensor, an inverse collimator that shields the sensor from at least a portion of the incident radiation originating from the direction in which the inverse collimator is pointed and a means for pointing the inverse collimator in different directions.
    Type: Application
    Filed: October 15, 2010
    Publication date: August 15, 2013
    Applicant: ATOMIC ENERGY OF CANADA LIMITED
    Inventors: Bhaskar Sur, Shuwei Yue, Arjun Das, Guy Jonkmans
  • Patent number: 8497485
    Abstract: An imaging apparatus includes an image sensor in which a plurality of area sensors arranged adjacent to each other to form an image sensor. A control circuit controls timing for reading out image data from each of the plurality of the area sensors based on area sensor arrangement information concerning the arrangement of each of the plurality of the area sensors.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: July 30, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroaki Niwa
  • Patent number: 8476594
    Abstract: A PET scanner (8) includes a ring of detector modules (10) encircling an imaging region (12). Each of the detector modules includes at least one detector pixel (24,34). Each detector pixel includes a scintillator (20, 30) optically coupled to one or more sensor APDs (54) that are biased in a breakdown region in a Geiger mode. The sensor APDs output a pulse in response to the light from the scintillator corresponding to a single incident radiation photon. A reference APD (26, 36) also biased in a break-down down region in a Geiger mode is optically shielded from light and outputs a temperature dependent signal. At least one temperature compensation circuit (40) adjusts a bias voltage applied to the sensor APDs based on the temperature dependent signal.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: July 2, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Thomas Frach, Gordian Prescher, Carsten Degenhardt
  • Patent number: 8450692
    Abstract: An apparatus and method to increase the sensitivity at the edge of radiation detector blocks is disclosed herein. Reduced sensitivity can result from photons entering a first detector block, escaping, and scattering into an adjacent detector, thereby depositing energy into two detectors blocks. Energy lost into adjacent detector blocks can be compensated with energy detected in the adjacent detector block. This can be done, for example, by processing channels from multiple detector blocks with one Field Programmable Gated Array (FPGA) on one Event Process Module (EPM) board. This can enable summing energy of one detector block with energy from an adjacent detector block when the initial interaction occurs at the edge of the first detector block. This can result in a better estimate of the amount of energy associated with the initial photon being detected.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: May 28, 2013
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Stefan B. Siegel, Dongming Hu
  • Patent number: 8354646
    Abstract: The scintillator plate has a reflective layer, a resinous anti-corrosion layer and a scintillator layer provided sequentially in that order on a heat resistant resin substrate. The scintillator plate is employed as a component for a flat panel radiation detector. The scintillator plate has a protective film between the scintillator layer and the flat light receiving element which makes up the flat panel radiation detector. There is point contact between the surface of the scintillator layer and the protective film and there is point contact between the flat light receiving element and the protective film.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: January 15, 2013
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventors: Shinji Kudo, Yasushi Nagata
  • Patent number: 8330114
    Abstract: Systems that increase the position resolution and granularity of double sided segmented semiconductor detectors are provided. These systems increase the imaging resolution capability of such detectors, either used as Compton cameras, or as position sensitive radiation detectors in imagers such as SPECT, PET, coded apertures, multi-pinhole imagers, or other spatial or temporal modulated imagers.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: December 11, 2012
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Lucian Mihailescu, Kai M. Vetter, Daniel H. Chivers
  • Patent number: 8269183
    Abstract: A radiation detector of this invention includes a pulse width modulation circuit for binarizing an analog electrical pulse outputted from a detector cell with a predetermined threshold, and modulating it into a digital electrical pulse, and a data superposer for outputting an incident position pulse train by superposing incident position pulses and concerning the position of the detector cell on which the radiation has fallen, and the digital electrical pulse detected by the radiation. Thus, position information which has conventionally been added after output of digital electrical pulse can be added into the digital electrical pulse. Therefore, compared with the conventional technique of adding position information after digital electrical pulse and transmitting the position information, the position of the radiation incident on the detector cell can be detected in a short time.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: September 18, 2012
    Assignees: Shimadzu Corporation, The University of Tokyo
    Inventors: Tetsuo Furumiya, Junichi Ohi, Hiroyuki Takahashi, Kenji Shimazoe
  • Patent number: 8227759
    Abstract: The apparatus has an energy calculation section 32 that calculates energy deposit values of interactions based on signals obtained from segmented electrodes 11, 12 provided on two opposite surfaces of a semiconductor crystal, a reference waveform storing section 33 that stores beforehand waveforms that will be obtained from the segmented electrodes when a single interaction occurs for multiple positions in the crystal, a waveform synthesis section 34 that synthesizes reference waveforms corresponding to arbitrary two points in the crystal as candidate points of interaction at a ratio equal to a ratio of their energy deposit values, and a comparison section 35 that compares a measured waveform and the synthesized waveforms. The candidate points from which the synthesized waveform most similar to the measured waveform is obtained is determined to be the positions of interactions. Thus, even in cases where multiple interactions occur, the positions of the interactions can be detected.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: July 24, 2012
    Assignee: Riken
    Inventors: Tomonori Fukuchi, Shinji Motomura, Shuichi Enomoto, Yousuke Kanayama
  • Publication number: 20120112080
    Abstract: Systems that increase the position resolution and granularity of double sided segmented semiconductor detectors are provided. These systems increase the imaging resolution capability of such detectors, either used as Compton cameras, or as position sensitive radiation detectors in imagers such as SPECT, PET, coded apertures, multi-pinhole imagers, or other spatial or temporal modulated imagers.
    Type: Application
    Filed: January 12, 2012
    Publication date: May 10, 2012
    Applicant: Lawrence Livermore National Security, LLC.
    Inventors: Lucian MIHAILESCU, Kai M. VETTER, Daniel H. CHIVERS
  • Patent number: 8153986
    Abstract: A system in one embodiment includes an array of radiation detectors; and an array of imagers positioned behind the array of detectors relative to an expected trajectory of incoming radiation. A method in another embodiment includes detecting incoming radiation with an array of radiation detectors; detecting the incoming radiation with an array of imagers positioned behind the array of detectors relative to a trajectory of the incoming radiation; and performing at least one of Compton imaging using at least the imagers and coded aperture imaging using at least the imagers. A method in yet another embodiment includes detecting incoming radiation with an array of imagers positioned behind an array of detectors relative to a trajectory of the incoming radiation; and performing Compton imaging using at least the imagers.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: April 10, 2012
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Lucian Mihailescu, Kai M. Vetter
  • Patent number: 8110810
    Abstract: Methods are presented that increase the position resolution and granularity of double sided segmented semiconductor detectors. These methods increase the imaging resolution capability of such detectors, either used as Compton cameras, or as position sensitive radiation detectors in imagers such as SPECT, PET, coded apertures, multi-pinhole imagers, or other spatial or temporal modulated imagers.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: February 7, 2012
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Lucian Mihailescu, Kai M. Vetter, Daniel H. Chivers
  • Patent number: 8084746
    Abstract: A direct conversion radiation detector includes a detector body made from a direct conversion material, a plurality of segmented electrode members operatively coupled to a radiation-receiving side of the detector body and at least one electrode operatively coupled to a second side of the detector body. The radiation detector is configured such that received radiation is incident on the segmented electrode members. The radiation detector provides reduced polarization effects for a variety of high flux radiation detection applications.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: December 27, 2011
    Assignee: Multi-Dimensional Imaging, Inc.
    Inventor: Hadong Kim
  • Publication number: 20110284754
    Abstract: A semiconductor 2D position detector for two-dimensionally detecting positions of radiation is a Schottky diode comprising: a semiconductor substrate 2; a first to an nth (n is an integer of 2 or higher) stripe electrodes 3 arranged on the surface 2A of the semiconductor substrate 2 at given intervals in the X direction and in parallel to the Y direction; and an electrode 15 formed on the rear surface 2B of the semiconductor substrate 2. The top and the bottom ends of each of the stripe electrodes 3 are sequentially connected via a resistor 4, 5, and signals V1 to V4 output from the radiation 16 applied to the semiconductor substrate 2 are obtained from each of the both ends of the first and the nth stripe electrodes placed far left and right.
    Type: Application
    Filed: December 3, 2009
    Publication date: November 24, 2011
    Applicant: TOHOKU UNIVERSITY
    Inventors: Keizo Ishii, Youhei Kikuchi
  • Patent number: 8053716
    Abstract: An imaging system comprises a first charge-coupled device (CCD), a second CCD, and a processor. The first CCD is configured to receive one or more light flashes, record a first set of data based on the light flashes, shift the first set of data in a first direction, read out the first set of data, and read out continuously. The second CCD is configured to receive the one or more light flashes, record a second set of data based on the light flashes, shift the second set of data in a second direction opposite to the first direction, read out the second set of data, and read out continuously. The processor, coupled to the first CCD and second CCD, is configured to determine a time and a location of the one or more light flashes based on the first set of data and the second set of data.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: November 8, 2011
    Assignee: Lockheed Martin Corporation
    Inventors: Munther M. Hindi, Lee M. Klynn
  • Patent number: 8049171
    Abstract: A sensor device of the type for sensing incident radiation by charge generation, has a substrate within which charge may be generated by incident radiation. A plurality of electrodes are arranged to cover an image area of the substrate and are selectively connectable to supplied DC voltages such that an electric field is created across the image area to sweep charge across multiple electrodes from the image area to an output. The voltage applied to one of the electrodes may be a voltage of a level so as to present a barrier to charge within the image area. The sensor thus has a variable sample area defined by the barrier voltage level.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: November 1, 2011
    Assignee: E2V Technologies (UK) Limited
    Inventors: Mark Robbins, Kevin Anthony Derek Hadfield
  • Publication number: 20110246137
    Abstract: A system and method for determining a probability of the location of an illicit radiation source within an environment based on directional detectors. An embodiment includes a plurality of directional radiation detectors distributed about the environment and integrated with a processing unit adapted to determine the probability of the source location based on the radiation count data received from the plurality of detectors. The processing unit is further adapted to output information indicative of the location of the radiation source within the environment.
    Type: Application
    Filed: September 14, 2010
    Publication date: October 6, 2011
    Inventors: Richard B. Vilim, Raymond T. Klann
  • Patent number: 7994482
    Abstract: A system and method determine a direction associated with gamma and/or neutron radiation emissions. A first radiation photon count associated with a first detector in a detector set is received from the first detector. The first radiation photon count is associated with at least one radiation source. A second radiation photon count associated with a second detector in the detector set is received from the second detector. The first radiation photon count is compared to the second radiation photon count. One of the first detector and the second detector is identified to have detected a larger number of radiation photons than the other. The at least one radiation source is determined to be substantially in a direction in which the one of the first detector and the second detector that has detected the larger number of radiation photons is facing.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: August 9, 2011
    Assignee: Innovative American Technology, Inc.
    Inventor: David L. Frank
  • Patent number: 7989774
    Abstract: A radiation detector includes a semiconductor element capable of detecting a radiation, a substrate on which the semiconductor element is mounted, and a flexible substrate including a connection pattern connected to an element electrode on an opposite side to the substrate of the semiconductor element. The semiconductor element is disposed on one surface of the substrate, and the flexible substrate is disposed on the opposite side to the substrate of the semiconductor element.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: August 2, 2011
    Assignee: Hitachi Cable, Ltd.
    Inventors: Juhyun Yu, Yoshinori Sunaga, Hidetaka Kawauchi, Shinichi Inoue, Isao Takahashi
  • Publication number: 20110168903
    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: Application
    Filed: June 18, 2009
    Publication date: July 14, 2011
    Inventors: Nicholas Roberts Kyele, Roelof Gozewijn Van Silfhout
  • Patent number: 7959517
    Abstract: A method and apparatus for changing the temperature pattern of the surface of a golf ball or golf club is disclosed. The apparatus includes a thermal device capable of imparting a temperature pattern onto the surface of a golf ball. The thermal device preferably imparts the temperature pattern from a distance, preferably while the golf ball is positioned on a golf tee. After a predetermined amount of time, the golf ball may be stuck by a golf club. A thermal imaging device, which may detect a cooling pattern imparted to the golf ball by prongs of a cooling device, is preferably used to acquire images of the temperature pattern. The acquired images may then be analyzed by a processor to determine the kinematic characteristics of the golf ball.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: June 14, 2011
    Assignee: Acushnet Company
    Inventor: Eric J. Lastowka