Dose Or Dose Rate Measurement Patents (Class 250/370.07)
  • Patent number: 10365154
    Abstract: A process for improving sensitivity of a film base, coated with a dispersion of a normally crystalline polyacetylenic compound in a non-solvating liquid which is dried on the film surface, to particular photon energy band, specifically, long wavelength UV; the polyacetylenic compound preferably having at least two conjugated acetylenic linkages and containing from 12 to 60 carbon atoms. The sensitization of the film to long wavelength UV is achieved via the addition of photoinitiator(s) capable of absorbing UV energy and converting it to free radicals. The process comprises dispersing the normally crystalline polyacetylenic compound in the non-solvating liquid to a concentration of from about 2 to about 50% polyacetylene crystalline solids and a photoinitiator or combination of photoinitiators to a concentration of from 0.01 to 10%. The resultant dispersion is then coated and dried on a substrate. Additionally, applications using this film as a UVA illumination indicator and dosimeter are disclosed as well.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: July 30, 2019
    Assignee: ISP Investments LLC
    Inventors: Robert Crohn, Rosemarie Fairman, Hsiao-Yi Shih
  • Patent number: 10338237
    Abstract: A radiation detector includes a block of a material capable of interacting with ionizing radiation to produce charge carriers, an inductor positioned adjacent to the block and having an inductance that depends on a number of the charge carriers in the block, and a sensing circuit coupled to sense a change in the inductance and detect the ionizing radiation base on the change. The sensing circuit may particularly contain an RF synthesizer that drives the inductance, e.g., an LC circuit containing the inductance, and an analyzer that detects changes in the response of the inductance.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: July 2, 2019
    Inventor: Emil Kamieniecki
  • Patent number: 10121803
    Abstract: A semiconductor device includes a substrate, a first conductive layer on the substrate and including a main pattern, and substantially symmetrical auxiliary patterns extending from two sides of the main pattern, an insulating layer on the substrate and the first conductive layer, and a second conductive layer on the insulating layer and overlapping at least a portion of the main pattern and the auxiliary patterns.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: November 6, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang-Soo Pyon, Min-Ho Ko, Hyun-Chol Bang, Kwang-Min Kim, Won-Kyu Kwak
  • Patent number: 10078145
    Abstract: Techniques for calibration of particle detectors are disclosed. In one aspect, a system for calibrating a particle detector includes a source configured to emit particles including a first and a second type of particles; a first and a second shielding unit configured to be removably positioned in a travel path of the particles and configured to block at least a portion of the first type of particles and to allow the second type of particles to traverse substantially unimpeded therethrough; one or more particle detectors positioned in the travel path of the particles to receive particles after traversing through the first or the second shielding unit and produce electronic pulses in response to the detection of the particles; and a processor coupled to the one or more particle detectors to generate training date and a classifier that allows classification of the first and the second types of particles.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: September 18, 2018
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Ronald E. Wurtz, Kristin Lennox
  • Patent number: 10068454
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a sensor data gathering, threshold exceedance determination, and alert generation mobile device communication system. One of the methods includes obtaining information associated with sensing instruments monitoring physical characteristics of an environment. Values associated with physical characteristics are determined to have exceeded respective thresholds using the obtained information. Alert information describing the values is generated in response to the determination.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: September 4, 2018
    Assignee: VACC, Inc.
    Inventors: Jon Byron Davis, Ahmad Bayat
  • Patent number: 9952335
    Abstract: The present invention provides a radiation detector, a radiographic imaging device and a radiographic imaging system that may detect radiation with high precision. Namely, in the radiation detector, radiation detection pixels include detection TFTs, and light that has been converted from radiation is illuminated directly from a scintillator onto the detection TFTs. Accordingly, leak current occurs in semiconductor active layers of the detection TFTs corresponding to the amount (intensity) of the illuminated light, and the leak current flows in to signal lines. Accordingly, radiation may be detected by monitoring the leak current, and enables timings, such as the start of irradiation of radiation, to be detected.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: April 24, 2018
    Assignee: FUJIFILM CORPORATION
    Inventor: Yoshihiro Okada
  • Patent number: 9817137
    Abstract: A thin, lightweight, and highly reliable energy ray detector that enables high-speed reading is provided. An energy ray detector (1) includes TFTs (20) that are arranged in a grid pattern and that each have an active layer formed of a semiconductor having an electrical property changing in accordance with the amount of applied energy ray radiation, and a property detection circuit unit (5) and a controller (60) that detect information regarding the energy ray radiation from changes in the electrical property of the TFTs (20).
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: November 14, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Ryohichi Masuda, Mikio Katayama, Hidenori Kawanishi
  • Patent number: 9802061
    Abstract: The disclosure is related to an apparatus and method for charged hadron therapy verification. The apparatus comprises a collimator comprising a plurality of collimator slabs of a given thickness, spaced apart so as to form an array of mutually slit-shaped openings, configured to be placed at a right angle to the beam line, so as to allow the passage of prompt gammas from the target, the collimator being defined at least by three geometrical parameters being the width and depth of the slit-shaped openings and a fill factor. The disclosure is also related to a method for charged hadron therapy verification with a multi-slit camera.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: October 31, 2017
    Assignees: Ion Beam Applications S.A., Université Claude Bernard Lyon 1, Institut National des Science Appliquées de Lyon, Centre National de Recherche Scientifique (CNRS)
    Inventors: Nicolas Freud, Frauke Roellinghoff, Etienne Testa, Marco Pinto, Julien Smeets
  • Patent number: 9664802
    Abstract: A simplified device is provided for analyzing radiation spectrum. A detector absorbs radioactive particles for generating signal pulses. A signal converter is connected with the detector to discriminate and amplify the signal pulses to be converted into digital pulses. The microcomputer single-chip is connected with the signal converter to measure dual-channel pulse widths for statistical analysis and to measure pulse free count. Under a very low power mode, a pair of information comprising random physical memory spectrum and pulse count are generated. The microcomputer single-chip has a low cost and can be abundantly supplied. Thus, by using the microcomputer single-chip as a touch-driven application, a reading module replaces the high-frequency precision clock. The reading module is built-in for charging voltages with constant-current pulses. Consequently, spectrum analysis is performed for the signal pulses of gamma ray detected by the detector.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: May 30, 2017
    Assignee: INSTITUTE OF NUCLEAR ENERGY RESEARCH, ATOMIC ENERGY COUNCIL, Executive Yuan, R.O.C.
    Inventors: Hsun-Hua Tseng, Tin-Yu Liaw
  • Patent number: 9659970
    Abstract: A semiconductor device includes a substrate, a first conductive layer on the substrate and including a main pattern, and substantially symmetrical auxiliary patterns extending from two sides of the main pattern, an insulating layer on the substrate and the first conductive layer, and a second conductive layer on the insulating layer and overlapping at least a portion of the main pattern and the auxiliary patterns.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: May 23, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang-Soo Pyon, Min-Ho Ko, Hyun-Chol Bang, Kwang-Min Kim, Won-Kyu Kwak
  • Patent number: 9570578
    Abstract: A gate forming process includes the following steps. A gate dielectric layer is formed on a substrate. A barrier layer is formed on the gate dielectric layer. A silicon seed layer and a silicon layer are sequentially and directly formed on the barrier layer, wherein the silicon seed layer and the silicon layer are formed by different precursors.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: February 14, 2017
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Keng-Jen Lin, Chien-Liang Lin, Yu-Ren Wang, Neng-Hui Yang
  • Patent number: 9564461
    Abstract: A radiation image-pickup device includes: a drive substrate including a transistor used to read, from each of a plurality of pixels, signal charge based on radiation; a charge collection electrode provided on the drive substrate, for each of the pixels; a conversion layer formed on the charge collection electrode, and configured to generate the signal charge by absorbing radiation; a counter electrode provided on the conversion layer; and a first conductive film disposed, between the drive substrate and the charge collection electrode, to face at least a part of the charge collection electrode, and included in a first capacitive element configured to retain the signal charge.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: February 7, 2017
    Assignee: Sony Semiconductor Solutions Corporation
    Inventor: Takashi Fujimura
  • Patent number: 9506970
    Abstract: A method for characterizing the sensitivity of an electronic component with respect to a natural radiating environment. The safe operating area (SOA) voltage range beyond which destructive events occur is determined for the electronic component for given characteristics of a particle or incident beam. The electronic component is turned on and energized with the particle or incident beam having the given characteristics under the operating conditions that are close to the highest voltage value of the determined SOA voltage range. An efficient section of amplified transient events, which corresponds to an estimation of the destructive occurrences for the electronic component is determined. The characteristics of the particle or beam is modified and the method is repeated with the modified characteristics.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: November 29, 2016
    Assignee: AIRBUS GROUP SAS
    Inventors: Florent Miller, Sebastien Morand
  • Patent number: 9470577
    Abstract: A UV exposure dosimetry system includes at least one UV sensor that accurately measures the UV irradiance intensity. The UV dosimetry system integrates the measured UV irradiance intensity over time to calculate the real-time UV dosage and the vitamin D production by taking into account factors comprising UV sensor location, body surface area, clothing coverage, and sunscreen usage. Based on the measurement, the system can predict the time remaining to skin burn and the time remaining to reach daily goal of vitamin D production. The system can also provide feedback to the user of the device based on a composite metric assessing the degree of balance between the risk of UV exposure and the benefit of UV exposure. The UV dosimetry system supports multi-user control through an advanced and user friendly input and output interface.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: October 18, 2016
    Inventors: Jie Lian, Nabyl Bennouri, Nattapon Chaimanonart
  • Patent number: 9372151
    Abstract: A device for Surface Enhanced Infrared Absorption (SEIRA) that includes at least one pair of metallic antennas deposited on a substrate, wherein the pair of metallic antennas are collinear. The length, width, and height of the metallic antenna determines an infrared absorption of the pair of metallic antennas. The device also includes a gap located between the pair of metallic antennas. A chemical moiety is disposed on at least a portion of the metallic antennas such that the infrared absorption of the chemical moiety is enhanced by the at least one pair of metallic antennas.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: June 21, 2016
    Assignee: William Marsh Rice University
    Inventors: Lisa V. Brown, Ke Zhao, Nancy J. Halas, Peter J. Nordlander
  • Patent number: 9314646
    Abstract: A skin dose evaluation support apparatus is provided with a skin region contour creation unit that creates skin region information including the boundary coordinates of a skin region, based on image data to be inputted when a treatment plan for a radiation therapy for a patient is created; and a display calculation unit that extracts a skin dose in a skin region, based on dose distribution data calculated by a dose distribution calculation unit of a treatment planning apparatus and the skin region information, and creates display data for displaying the extracted skin dose in a predetermined display format.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: April 19, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hideki Fuji, Yasuyuki Takatani
  • Patent number: 9297907
    Abstract: System and method for monitoring receipt and estimating flux value, in real time, of incident radiation, using two or more nanostructures (NSs) and associated terminals to provide closed electrical paths and to measure one or more electrical property change values ?EPV, associated with irradiated NSs, during a sequence of irradiation time intervals. Effects of irradiation, without healing and with healing, of the NSs, are separately modeled for first order and second order healing. Change values ?EPV are related to flux, to cumulative dose received by NSs, and to radiation and healing effectivity parameters and/or ?, associated with the NS material and to the flux. Flux and/or dose are estimated in real time, based on EPV change values, using measured ?EPV values. Threshold dose for specified changes of biological origin (usually undesired) can be estimated. Effects of time-dependent radiation flux are analyzed in pre-healing and healing regimes.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: March 29, 2016
    Assignee: The United States of America as Represented by the Administrator of the National Aeronautics & Space Administration (NASA)
    Inventors: Jing Li, Richard T. Wilkins, James J. Hanratty, Yijiang Lu
  • Patent number: 9270904
    Abstract: An X-ray imaging system is provided. The X-ray imaging system includes an X-ray radiation source. The X-ray imaging system also includes a source controller coupled to the source and configured to command emission of X-rays for image exposures. The X-ray imaging system further includes a digital X-ray detector configured to acquire X-ray image data without communication from the source controller, wherein the digital X-ray detector includes a photovoltaic device, and the digital X-ray detector is configured to determine one or more of a beginning, end, or duration of an image exposure via the photovoltaic device.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: February 23, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Christopher Alden Hammond, Ping Xue, Diego Fernando Freire Munoz, Amanda Lynn Pratt, Robert Carl Minnich, Gregory Donald Schumacher-Novak, Michael Lee Spohn
  • Patent number: 9250332
    Abstract: To provide a radiation image detecting device providing high responsivity and high precision of an emission start judgment, an electronic cassette has a panel unit and a control unit. The panel unit has a two-dimensional array of normal pixels for accumulating signal charge upon receiving X-rays and detection pixels for detecting the X-rays. A signal processing circuit periodically samples a dose signal, corresponding to an X-ray dose per unit of time, from the detection pixels. An emission start judgment unit performs based on the dose signals of the detection pixels a first judgment process for judging whether X-ray emission has been started, and a second judgment process for judging whether a result of the first judgment process is correct. The control unit sets a second sampling cycle SP2 used in the second judgment process longer than a first sampling cycle SP1 used in the first sampling process.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: February 2, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Yasufumi Oda
  • Patent number: 9186525
    Abstract: The invention is related to an apparatus and method for charged hadron therapy verification by detecting and/or quantifying prompt gammas produced when irradiating a target (6) with a charged hadron beam. The apparatus comprises a collimator (1) provided with a slit-shaped portion (2) configured to be arranged perpendicularly to the beam line and facing the target, a detection means (3,4) suitable for detecting said prompt gammas and a calculation and representation means. In the apparatus and method of the invention, the slit is configured to allow the passage of prompt gammas emitted from a range of depths in said target (6), said depths being measured in the direction of the charged hadron beam.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: November 17, 2015
    Assignees: Ion Beam Applications S.A., Université Libre de Bruxelles
    Inventors: Damien Prieels, Frédéric Stichelbaut, Julien Smeets, Alain Dubus, Jean-Claude Dehaes
  • Patent number: 9168002
    Abstract: Garments and methods for monitoring radiation exposure and cumulative radiation exposure in individuals undergoing repeated exposure to ionizing radiation are disclosed.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: October 27, 2015
    Assignee: Malecare, Inc.
    Inventor: Darryl Mitteldorf
  • Patent number: 9104097
    Abstract: A radiographic apparatus including an X-ray generating means which irradiates an object with X-rays, the apparatus comprises a first housing which includes an X-ray reception unit formed by a member having a higher X-ray transmittance than a frame member, a buffer material which is placed on the first housing and reduces a load on the X-ray generating means, an X-ray detection sensor which is placed on the buffer material and detects X-rays transmitted through the object, a support member whose support surface to support the X-ray detection sensor is placed on the X-ray detection sensor, and a second housing which includes a concave portion engaging with the convex portion formed on the support member and constrains movement of the support member.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: August 11, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Hidetomo Suwa
  • Patent number: 9068887
    Abstract: A UV dosimetry system comprises a wearable unit and a mobile computing device. The wearable unit measures the UV irradiance intensity and wirelessly communicates with the mobile computing device. The UV dosimetry system supports multi-user control and can link one mobile computing device with multiple wearable units. The UV dosimetry system processes the measured UV irradiance intensity to calculate the UV index (UVI) and the sensor site specific UV dose. It can also calculate the total absorbed UV dose and vitamin D production by taking into account user specific factors. The UVI data measured by a plurality of UV meters such as the disclosed UV dosimetry system are crowd sourced to a remote server together with the location and time data of the measurement. The remote server excludes invalid UVI measurement and generates UVI maps showing time-varying distribution of UVI data at different locations.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: June 30, 2015
    Inventors: Nabyl Bennouri, Jie Lian, Nattapon Chaimanonart
  • Publication number: 20150108356
    Abstract: Radiotherapy is one of the most effective treatments for cancer and its success depends critically on accurate targeting and delivery of the correct radiation dose. Accurate dosimetry is therefore essential to maintain and improve patient survival rates. However, size and long wait times currently limit water and graphite based calorimeters to standards laboratories leaving field-based dosimetry to ionization chamber measurements which depend upon a reference field-specified calibration factor. It would therefore be beneficial to provide radiotherapy equipment operators a direct approach of clinical reference dosimetry wherein the dosimeter provides increased independence on dose, dose rate, radiation energy, and energy type, etc. It would be further beneficial for such novel clinical dosimeters to be compact, function as secondary standards used routinely for measurements and allow radiotherapy doses to be measured directly and in an absolute manner.
    Type: Application
    Filed: May 29, 2013
    Publication date: April 23, 2015
    Inventors: Jan Seuntjens, Arman Sarfehnia, James Renaud
  • Publication number: 20150076356
    Abstract: Described is a method and system that facilitates triage of thousands to millions of potential patients within a relatively short period of time by scanning of a substrate of a designated card issued to a victim. The method and the system comprise a plurality of noninvasive self-testing test devices located at a plurality of remote peripheral self-testing sites, and each one of the plurality of noninvasive self-testing test devices facilitates self-testing of the substrate of the designated card. Each of the plurality of noninvasive self-testing test devices provides test results of the scan of the substrate of the designated card, and the potential patients are identified, then subsequently screened and triaged based upon the test results of the scan of the substrate of the designated card.
    Type: Application
    Filed: September 16, 2014
    Publication date: March 19, 2015
    Inventors: Robert M. Gougelet, James Robert White
  • Patent number: 8983035
    Abstract: A flat panel detector has pixels for obtaining image signals and detective pixels for detecting the amount of incident x-rays. A signal processing circuit is of a pipeline-type, wherein first and second buffer memories are connected to the output of an A/D converter. In a dose detecting operation, the signal processing circuit repeats primary cycles alternately with secondary cycles of a shorter length than the primary cycles. In the primary cycle, a dose detection signal based on electric charges from the detective pixels is input in the first buffer memory and, simultaneously, a dummy signal is output from the second buffer memory. In secondary cycle, the dose detection signal is output from the first buffer memory and, simultaneously, a second dummy signal is input in the second buffer memory. On the basis of the dose detection signals, a start-of-radiation detector detects the start of x-ray radiation.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: March 17, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Kentaro Noma, Kenji Nakamura, Naoto Iwakiri, Kouichi Kitano, Keita Watanabe
  • Patent number: 8981308
    Abstract: A method for measuring a dose related to the non-ionizing effects of a radiation of particles comprises the irradiation of a capacitive element provided with an electrode made from a semiconductor material, the measurement of the capacitance of the capacitive element in an accumulation regime and the determination of the dose related to the non-ionizing effects from the measurement of capacitance of the capacitive element in the accumulation regime.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: March 17, 2015
    Assignee: Universite Montpellier 2 Sciences et Techniques
    Inventors: Richard Arinero, Julien Mekki, Antoine Touboul, Frederic Saigne, Jean-Roch Vaille
  • Patent number: 8927939
    Abstract: The purpose of the present invention is to improve energy resolving power and prevent energy resolving power from deteriorating when a thick semiconductor detection element with a wide energy range is used, in a radiation measuring device using a semiconductor detector and a nuclear medicine diagnostic device. With the present invention, the purpose is achieved by pulsed wave value correction employing the difference of (Hs?Hf) between the pulsed wave height value Hs obtained from the slow speed shaping circuit, and the pulsed wave height value Hf obtained from the fast speed shaping circuit and normalized with respect to Hs. An even more desirable result may be obtained by employing either (Hs?Hf)/Hf or exp(k(Hs?Hf)/Hf), wherein k is a coefficient to be optimized, said optimization being dependent on the measurement assembly.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: January 6, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Tomoyuki Seino, Yuichiro Ueno, Takafumi Ishitsu
  • Publication number: 20140353514
    Abstract: The present invention relates to an X-ray parameter measuring arrangement comprising a detector for measuring said parameter configured to be positioned in a position adjacent to an x-ray source arranged to generate a ray formation having a primary ray portion for radiating an object. The position is chosen in such a way that the interference with a reproduced image is reduced or eliminated.
    Type: Application
    Filed: June 3, 2013
    Publication date: December 4, 2014
    Inventor: Tomas Unfors
  • Publication number: 20140312239
    Abstract: A device is described that includes sensors that are sensitive to displacement damage, and can be configured to display a characteristic damage curve. The sensors, or diodes, can be made of one or more semiconductor materials that are sensitive to displacement damage, and can be operated in dark illumination conditions. The sensors can have multiple shields of a specific or varied thickness. The shields can be formed in different configurations, though the shielding thickness can be designed to change the level of displacement damage absorbed by the sensors. The characteristic damage curve can provide a sensor response variable that displays a functional dependence on displacement damage. For example, the characteristic damage curve can provide a sensor response variable that is one or more currents measured at one or more fixed voltages, or one or more voltages measured at one or more fixed currents.
    Type: Application
    Filed: March 11, 2014
    Publication date: October 23, 2014
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Scott R. Messenger, Cory D. Cress, Michael K. Yakes, Jeffrey H. Warner, Robert J. Walters
  • Patent number: 8858888
    Abstract: One feature pertains to a radiation dosimeter comprising a microdosimeter cell array that includes a first microdosimeter cell having a first semiconductor volume configured to generate a first current in response to incident radiation. The first semiconductor volume may have at least one of a first size, a first shape, a first semiconductor type, and/or a first semiconductor doping type and concentration that is associated with a first biological cell type or a first biological cell component type. The dosimeter may further comprise a processing circuit communicatively coupled to the microdosimeter cell array and configured to generate a signal based on the first current. The signal generated may be indicative of an amount of radiation absorbed by the microdosimeter cell array. A display may be utilized by the dosimeter to show a radiation level reading based on the signal generated.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: October 14, 2014
    Inventors: James Francis Ziegler, Chao-tuan Liu, Razmig Hagop Messerian, Wayne Newhauser
  • Patent number: 8859944
    Abstract: A method and apparatus of coordinated in-pixel light detection is provided. In one aspect, the method includes implementing an N-number of avalanche photodiodes inside a pixel circuit of a light detection circuit. The method also includes coordinating an output of the N-number of avalanche photodiodes through a counter circuit. The method further includes reducing a deadtime of the light detection circuit by a factor of ‘N’ through the N-number of avalanche photodiodes and the counter circuit operating in concert. The method furthermore includes measuring an intensity of a light through the light detection circuit. N-number of avalanche photodiodes is in a common well of a semiconductor technology. N-number of avalanche photodiodes is fabricated on a deep submicron semiconductor technology. A fill factor of the pixel circuit improves and a deadtime reduces through fabrication of the avalanche photodiodes in a common well. Also, a photon count rate increases through reducing the deadtime.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: October 14, 2014
    Assignee: King Abdulaziz City Science and Technology
    Inventors: Munir Eldesouki, Mohamed Jamal Deen, Qiyin Fang
  • Patent number: 8853638
    Abstract: According to an embodiment, a radioactivity evaluation method has: a first input step; a selection step in which the calculating section selects a representative neutron energy spectrum and a representative neutron fluence rate; a second input step; an radioactivity calculating step in which the calculating section calculates quantities of the radioactivity that correspond to the representative neutron energy spectra and the representative neutron fluence rates; a data storing step; a nuclide-by-nuclide radioactivation reaction rate calculating step in which the calculating section calculates a radioactivation reaction rate of each nuclide based on the neutron energy spectra at the position of each of the object sections; an object-by-object adding-up step; a nuclide determining step; and an object position determining step.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: October 7, 2014
    Assignees: The Japan Atomic Power Company, Kabushiki Kaisha Toshiba
    Inventors: Kenichi Tanaka, Hidenori Tanabe, Hideaki Ichige, Masahiko Kurosawa, Satoshi Yagishita, Kaoru Matsushita, Takayuki Hirouchi, Hidehiko Iida, Tatsuya Ikeda, Koh Akatsu
  • Patent number: 8853615
    Abstract: A method for measuring radiation of energy photons, such as ultraviolet radiation, on a surface, may include programming at least one transistor by at least transmitting an electric charge to it. The method may further include measuring an electrical quantity of the at least one transistor receiving radiation of energy photons and estimating, based on this electrical quantity, an amount of radiation received.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: October 7, 2014
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: Julia Castellan, Philippe Boivin
  • Publication number: 20140291533
    Abstract: To provide a radiation image detecting device providing high responsivity and high precision of an emission start judgment, an electronic cassette has a panel unit and a control unit. The panel unit has a two-dimensional array of normal pixels for accumulating signal charge upon receiving X-rays and detection pixels for detecting the X-rays. A signal processing circuit periodically samples a dose signal, corresponding to an X-ray dose per unit of time, from the detection pixels. An emission start judgment unit performs based on the dose signals of the detection pixels a first judgment process for judging whether X-ray emission has been started, and a second judgment process for judging whether a result of the first judgment process is correct. The control unit sets a second sampling cycle SP2 used in the second judgment process longer than a first sampling cycle SP1 used in the first sampling process.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 2, 2014
    Applicant: FUJIFILM Corporation
    Inventor: Yasufumi ODA
  • Patent number: 8841622
    Abstract: A direct ion storage (DIS) radiation detector or dosimeter has a design that is easy and low cost to manufacture using semiconductor processing techniques. The detectors include internal communications interfaces so they are easy to read. Different interfaces, including wired, e.g. USB ports, and wireless interfaces, may be used, so that the dosimeters may be read over the internet. The detectors can thus be deployed or used in a variety of detection systems and screening methods, including periodic or single time screening of people, objects, or containers at a location by means of affixed dosimeters; screening of objects, containers or people at a series of locations by means of affixed dosimeters, and surveillance of an area by monitoring moving dosimeters affixed to people or vehicles.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: September 23, 2014
    Assignee: Mirion Technologies, Inc.
    Inventors: Jukka Kahilainen, Thomas Logan
  • Publication number: 20140264039
    Abstract: An integrated circuit includes a sensing module, a measuring module, a comparing module, and memory. The sensing module senses radiation incident on the integrated circuit. The measuring module communicates with the sensing module and measures an amount of the radiation incident on the integrated circuit. The comparing module communicates with the measuring module and compares the amount of the radiation to a predetermined threshold and generates an indication that the amount of the radiation is less than the predetermined threshold or that the amount of the radiation is greater than or equal to the predetermined threshold. The memory stores the indication.
    Type: Application
    Filed: June 26, 2013
    Publication date: September 18, 2014
    Inventors: Hal Kurkowski, Subbayya Chowdary Yanamadala, Prem Ramachandran Nayar, James Price Cusey, Shiauchwun G. Pwu, John Wettroth
  • Patent number: 8829452
    Abstract: An avalanche photodiode (APD) electro-magnetic radiation (EMR) detector for visible to near infrared wavelengths is described. The detector includes an EMR absorption region, a voltage biasing element, and a charge multiplication region. The EMR absorption region includes a substantially regular array of silver or aluminum nanoparticles embedded in a matrix material. The voltage biasing element is configured to apply a bias voltage to the matrix material such that electrical current is directly generated in the EMR absorption region based on a cooperative plasmon effect in the detector material when electro-magnetic radiation in the visible to near infrared wavelength range is incident upon the detector material, where the dominant mechanism for decay in the cooperative plasmon effect is non-radiative. The charge multiplication region is arranged relative to the EMR absorption region to avalanche multiply the electrical current generated in the EMR absorption region.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: September 9, 2014
    Assignee: Rockwell Collins, Inc.
    Inventor: Robert G. Brown
  • Patent number: 8816289
    Abstract: The present invention discloses a gamma dose rate measurement system comprising a shielding device and an electronic device. The shielding device is arranged for masking a visible light, so that only a light source substantially being a gamma ray passes through the shielding device. The electronic device comprises a sensing module, an image analysis module and a display module. The sensing module generates a current signal after sensing the gamma ray; the image analysis module receives the current signal and generates an analysis result including a total gamma dose rate and a gamma energy spectrum; and the display module is arranged for displaying the analysis result.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: August 26, 2014
    Assignee: National Applied Research Laboratories
    Inventors: Din Ping Tsai, Chih-Chieh Wu, Chih-Chung Chou, Tai-Shan Liao, Chi-Hung Huang
  • Patent number: 8810416
    Abstract: An assembly (13) for monitoring ionising radiation comprises a detector substrate (2) for generating electronic charge responsive to incident ionising radiation, the detector substrate (2) having an array of ionising radiation sense volumes (12) formed in it. A circuit substrate (14) supporting an array of read-out circuits (16) corresponding to the array of sense volumes is mechanically and electrically coupled to the detector substrate (14). Each of the read-out circuits (16) is switchable between first and second charge integration modes for receiving charge from a corresponding sense volume. A charge integration circuit (30) is configured in the first charge integration mode to integrate charge corresponding to sensing of a single ionising radiation detection event in a corresponding sense volume and in the second charge integrating mode to integrate charge corresponding to sensing a plurality of ionising radiation detection events in the corresponding sense volume.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: August 19, 2014
    Assignee: Radiation Watch Limited, LLC
    Inventors: Peter Trevor Doughty, Michael John Anderson, David Jeremy Prendergast, Ian Benson
  • Patent number: 8791418
    Abstract: A two-dimensional array of memory cells may be used to implement a spatial dosimeter. The two-dimensional array of cells may be implemented by an integrated circuit memory. Because of the relatively small size of the integrated circuit memory, the resolution of the resulting array may be less than 100 nanometers. The change in threshold voltage of each of the cells, as a result of radiation exposure, may be used to calculate the dose seen at each cell, allowing dose profiles in two dimensions with sub-micrometer resolution.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: July 29, 2014
    Assignee: Micron Technology, Inc.
    Inventors: Angelo Visconti, Mauro Bonanomi, Giorgio Cellere, Alessandro Paccagnella
  • Publication number: 20140203181
    Abstract: Digital images or the charge from pixels in light sensitive semiconductor based imagers may be used to detect gamma rays and energetic particles emitted by radioactive materials. Methods may be used to identify pixel-scale artifacts introduced into digital images and video images by high energy gamma rays. Statistical tests and other comparisons on the artifacts in the images or pixels may be used to prevent false-positive detection of gamma rays. The sensitivity of the system may be used to detect radiological material at distances in excess of 50 meters. Advanced processing techniques allow for gradient searches to more accurately determine the source's location, while other acts may be used to identify the specific isotope. Coordination of different imagers and network alerts permit the system to separate non-radioactive objects from radioactive objects.
    Type: Application
    Filed: September 13, 2013
    Publication date: July 24, 2014
    Applicant: Image Insight Inc.
    Inventor: Eric P. Rubenstein
  • Patent number: 8772729
    Abstract: An avalanche photodiode (APD) electro-magnetic radiation (EMR) detector is described. The detector includes an EMR absorption region, a voltage biasing element, and a charge multiplication region. The EMR absorption region includes a substantially regular array of nano-particles embedded in a matrix material. The voltage biasing element is configured to apply a bias voltage to the matrix material such that electrical current is directly generated in the EMR absorption region based on a cooperative plasmon effect in the detector material when electro-magnetic radiation in a predetermined wavelength range is incident upon the detector material, where the dominant mechanism for decay in the cooperative plasmon effect is non-radiative. The charge multiplication region is arranged relative to the EMR absorption region to avalanche multiply the electrical current generated in the EMR absorption region.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: July 8, 2014
    Assignee: Rockwell Collins, Inc.
    Inventors: Robert G. Brown, James H. Stanley
  • Patent number: 8766199
    Abstract: A detector tile (116) of an imaging system (100) includes a photosensor array (204) and electronics (208) electrically coupled to the photosensor array (204), wherein the electronics includes a dose determiner (402) that determines a deposited dose for the detector tile (116) and generates a signal indicative thereof. In one non-limiting instance, this signal is utilized to correct parameters such as gain and thermal coefficients, which may vary with radiation dose.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: July 1, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Marc A. Chappo, Randall P. Luhta, Rodney A. Mattson
  • Patent number: 8742357
    Abstract: A semiconductor radiation sensor (100), comprising a substrate (102), a carrier material (104) mounted to the substrate (102), and a semiconductor detector (106) mounted to the carrier material (104). A radiation sensitive portion of the semiconductor detector (106) is oriented towards the carrier material (104) and generally away from the substrate (102), and the carrier material is adapted to transmit radiation to the radiation sensitive portion of the semiconductor detector (106). A dosimeter comprising the radiation sensor (100) and a method of manufacturing the radiation sensor (100) are also provided.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: June 3, 2014
    Assignee: University of Wollongong
    Inventor: Anatoly Rozenfeld
  • Patent number: 8735842
    Abstract: A non-visible particle detection device includes an optical module capable of converting an ionizing radiation into visible light. The optical module includes has an attachment unit that is configured to removably attach the optical module to the image capturing module of a mobile device. The image capturing module generates a photon digital image based on the photons converted from the ionizing radiation. The mobile device can be implemented with a radiation dose determining module to execute a radiation dose equivalent calculation method. Based on the pixel brightness analysis of the photon digital image, the radiation equivalent dose can be determined. This method sums up the total brightness of all pixels in the images, determines whether the total brightness is smaller than the minimum effective brightness, and determines the radiation equivalent dose when the total brightness is equal to or larger than the minimum effective brightness.
    Type: Grant
    Filed: January 21, 2012
    Date of Patent: May 27, 2014
    Assignee: National Applied Research Laboratories
    Inventors: Din Ping Tsai, Chih-Chieh Wu, Tai-Shan Liao, Chi-Hung Huang
  • Patent number: 8729483
    Abstract: Certain embodiments described herein are directed to devices and systems that can be used for direct and indirect detection of radiation such as X-rays. In certain examples, the device can include a modulator optically coupled to a sensor. In some examples, the modulator can be configured to switch between different states to provide an imaging signal in one state and a dosimetry signal in another state.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: May 20, 2014
    Assignee: Perkinelmer Holdings, Inc.
    Inventor: Farhad Ghelmansarai
  • Publication number: 20140131583
    Abstract: A radiation detector dosimeter system/method implementing a corrected energy response detector is disclosed. The system incorporates charged (typically tungsten impregnated) injection molded plastic that may be formed into arbitrary detector configurations to affect radiation detection and dose rate functionality at a drastically reduced cost compared to the prior art, while simultaneously permitting the radiation detectors to compensate for radiation intensity and provide accurate radiation dose rate measurements. Various preferred system embodiments include configurations in which the energy response of the detector is nominally isotropic, allowing the detector to be utilized within a wide range of application orientations. The method incorporates utilization of a radiation detector so configured to compensate for radiation counts and generate accurate radiation dosing rate measurements.
    Type: Application
    Filed: May 13, 2013
    Publication date: May 15, 2014
    Inventor: Olivier Gaëtan Giarmana
  • Patent number: 8692206
    Abstract: Systems, devices, and methods are described including implantable radiation sensing devices having exposure determination devices that determines cumulative exposure information based on the at least one in vivo measurand.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: April 8, 2014
    Inventors: Roderick A. Hyde, Muriel Y. Ishikawa, Eric C. Leuthardt, Michael A. Smith, Elizabeth A. Sweeney, Lowell L. Wood, Jr.
  • Publication number: 20140088401
    Abstract: A radiation dosimeter includes a semiconductor substrate and a buried insulator layer disposed on the semiconductor substrate. The buried insulator layer has a plurality of charge traps. A semiconductor layer is disposed on the buried insulator layer. The semiconductor layer has an emitter, an intrinsic base, and a collector laterally arranged with respect to one another. In response to radiation exposure by the radiation dosimeter, positive charges are trapped in the plurality of charge traps in the buried insulator layer, the amount of positive charge trapped being used to determine the amount of radiation exposure.
    Type: Application
    Filed: October 9, 2012
    Publication date: March 27, 2014
    Applicant: International Business Machines Corporation
    Inventors: Jin Cai, Effendi Leobandung, Tak H. Ning, Jeng-Bang Yau