With Heating Of Luminophors Patents (Class 250/337)
  • Patent number: 10520387
    Abstract: A gas leakage treatment method includes detecting a target gas concentration of a target gas in an environment at a corresponding position of a gas delivery pipeline in a process of moving along the gas delivery pipeline. The method further includes, if the target gas concentration is greater than a preset concentration threshold, determining that gas leakage occurs and performing a gas leakage treatment operation.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: December 31, 2019
    Assignee: SZ DJI TECHNOLOGY CO., LTD.
    Inventors: Qiguang Wang, Yao Li, Yongjian Zhao, Hui Sun, Yuanzhen Guo
  • Patent number: 10488530
    Abstract: A dosimeter for recording a level of radiation exposure, and a reader for measuring the level of radiation recorded by the dosimeter, are disclosed. In some embodiments the dosimeter comprises at least one luminescent bead coupled to a fibre. The reader comprises a means for holding the dosimeter, stimulating means for stimulating a region of the dosimeter to cause luminescence, and a light detector for measuring intensity of light produced by the at least one bead during heating. In some embodiments the reader can be configured to record readings from a dosimeter comprising a fibre without beads. A system comprising the dosimeter and reader is disclosed. Methods of using the dosimeter, reader and system are also disclosed.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: November 26, 2019
    Assignee: TrueInvivo Limited
    Inventor: Shakardokht Jafari
  • Patent number: 10488275
    Abstract: A non-invasive temperature verification system used in a TLD system, which comprises at least one thermal sensor, which is placed near each of TLD element, measuring its temperature during heating cycle. The signal data from each thermal sensor is converted to time temperature profile which is used to verify and calibrate the TLD system.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: November 26, 2019
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Luis Benevides, Jeffrey Delzer
  • Patent number: 10436918
    Abstract: A scintillator type radiation detector package is provided including a scintillation crystal directly coupled to the window of a photomultiplier. A scintillator package is also provided having a longer life at wellbore temperature with minimal deterioration of a hygroscopic scintillation crystal(s). Direct optical coupling of the scintillator to the photomultiplier reduces the amount of light lost at coupling interfaces and improved detection resolution over the conventional structures having separate packages for crystal and photomultiplier.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: October 8, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ken Stephenson, Peter Wraight, Wolfgang Ziegler, John J. Simonetti, Christian Stoller, Irina Molodetsky
  • Patent number: 10422886
    Abstract: A method for detecting radiation exposure by a smart radiation dosimeter (SRD) is described. The method comprises a step of activating a radiation sensor of the SRD by establishing a communicative coupling between the radiation and a dongle of the SRD. The method also comprises receiving, by the radiation sensor, personal identification information (PII) from the dongle, the PII identifying an individual holding the SRD. The method also comprises detecting, by the radiation sensor, a radiation level and recording, by the radiation sensor, the radiation level. The method also comprises generating, by the radiation sensor, one or more data packets that include the radiation level, the PII, a time stamp of when the radiation level was detected and location information pertaining to where the radiation level was detected; and transmitting the one or more data packets to a network device or cloud storage.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: September 24, 2019
    Assignee: CLINITRAQ
    Inventors: Divakar Krishnareddy, Raghuram Bala, Hoang Tung
  • Patent number: 10376228
    Abstract: The invention concerns an X-ray detection device comprising an X-ray sensing member and an X-ray energy filter comprising an attenuation member configured to attenuate low-energy X-rays to a greater extent than high-energy X-rays in a beam or field of X-radiation directed towards the X-ray sensing member.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: August 13, 2019
    Assignee: RTI Group AB
    Inventor: Lars Herrnsdorf
  • Patent number: 10379227
    Abstract: Provided are a method for measuring dose distribution in a mixed radiation field of neutrons and gamma rays, and a method for measuring beam uniformity of a mixed radiation field of neutrons and gamma rays. The planar dose measuring method includes: a step of obtaining a total dose of neutrons and gamma rays by measuring with a dosimeter; and a step of analyzing a neutron dose. The method may effectively measure the doses of neutrons and gamma rays, may be applied to beam measurement and treatment plan validation, and thus improve the quality of treatment.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: August 13, 2019
    Assignee: NEUBORON MEDTECH LTD.
    Inventors: Yuanhao Liu, Ming-Chen Hsiao
  • Patent number: 10244946
    Abstract: In order to provide a temperature sensor or a temperature measuring apparatus having a temperature sensor, which enables direct temperature measurement, in particular even during treatment, in particular even with HF surgical devices, it is proposed that the temperature sensor includes a sensor element with a medium which can be excited to luminescence, in particular fluorescence, and an optical waveguide which is optically connected to the sensor element and is intended to supply light to the medium at an excitation wavelength and/or to pick up and conduct light at a luminescence wavelength of the medium which can be excited to luminescence.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: April 2, 2019
    Assignee: Aesculap AG
    Inventors: Anton Keller, Stefan Eick, Thomas Maser, Christoph Rothweiler, Sebastian Langen, Raimund Hibst, Oliver Fugger, Detlef Russ
  • Patent number: 10107551
    Abstract: A method of of preparing samples for XRF using a flux and a platinum crucible includes forming the flux into a free-standing crucible liner. This may be achieved by mixing lithium borate particles with a liquid to form a paste; placing the lithium borate paste onto the inner surface of a mould; and after drying removing from the mould and firing the lithium borate paste to dry the lithium borate to form a free-standing crucible liner. The liner may be placed within a platinum crucible and then a sample placed in the liner. The temperature of the crucible is raised to a sufficient temperature that any oxidation reaction takes place before taking the temperature above the melting temperature of the flux to melt the crucible liner and dissolve the sample into the flux. The crucible can then be cooled and XRF measurements made on the sample.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: October 23, 2018
    Assignee: MALVERN PANALYTICAL B.V.
    Inventor: Mark Ingham
  • Patent number: 10012739
    Abstract: A radiation dosimeter records absorbed radiation using a passive radiation sensor having one or more radiation-sensitive elements (RSEs) and a radiation-insensitive element (RIE). Floating gate MOSFET technology is used for both the RSEs and the RIE. A reader is connected to the sensor by means of a switching channel in order to pre-charge the sensor before exposure and to read the sensor voltage signals after exposure to radiation. The voltage signals of the RIE are used to correct for the spurious effect of voltage retention loss in the RSEs.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 3, 2018
    Assignee: ROTEM IND. LTD.
    Inventor: Dimitry Ginzburg
  • Patent number: 9964455
    Abstract: A method of monitoring a surface temperature of a hot gas path component includes directing an excitation beam having an excitation wavelength at a layer of a sensor material composition deposited on a hot gas path component to induce a fluorescent radiation. The method includes measuring fluorescent radiation emitted by the sensor material composition. The fluorescent radiation includes at least a first intensity at a first wavelength and a second intensity at a second wavelength. The surface temperature of the hot gas path component is determined based on a ratio of the first intensity at the first wavelength and the second intensity at the second wavelength of the fluorescent radiation emitted by the sensor material composition.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: May 8, 2018
    Assignee: General Electric Company
    Inventors: Mark Allen Cheverton, Anant Achyut Setlur, Victor Petrovich Ostroverkhov, Guanghua Wang, James Anthony Brewer, Venkat Subramaniam Venkataramani
  • Patent number: 9927294
    Abstract: A UV exposure dosimetry system includes at least one UV sensor that accurately measures the UV irradiance intensity. The system can generate extrapolated UV intensity data based on measured UV intensity data to correct unreliable UV measurement due to inconsistent irradiation of UV light. The UV dosimetry system integrates the extrapolated UV intensity data 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 UV dosimetry system supports multi-user control through an advanced and user friendly input and output interface.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: March 27, 2018
    Assignee: Ultra, Inc.
    Inventors: Jie Lian, Nabyl Bennouri, Nattapon Chaimanonart
  • Patent number: 9833637
    Abstract: A skin patch sensor having a groove therein to receive a sensor without leaving any air pockets is described. The skin patch sensor also has a water or tissue equivalent material and/or, in some embodiments, a moldable water equivalent material.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: December 5, 2017
    Assignee: RadiaDyne LLC
    Inventor: John Isham
  • Patent number: 9671386
    Abstract: Improved methods of detecting thermal exposure are provided herein. The provided methods utilize initially dormant luminescent probes incorporated into a matrix to form a composite. When exposed to heat over a period of time, the luminescent probes are “activated” through a molecular transformation initiated by thermal energy. The activated probes exhibit a luminescent profile based on the extent of thermal exposure, thereby providing an indicator of the thermal exposure experienced by the matrix. When the composite is used to produce a structural component of a vehicle (e.g., an aircraft), the methods provide a convenient, large-area indicator of thermal damage experienced by the structural component.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: June 6, 2017
    Assignee: University of Washington through its Center for Commercialization
    Inventors: Brian D. Flinn, Alex Kwan-yue Jen, Sei-Hum Jang, Tucker Howie, Zhengwei Shi
  • Patent number: 9480448
    Abstract: A system and method for use in mapping a radiation dose applied in an angiography imaging procedure is provided. The system can include an image acquisition system, a table in support of the patient, and a computer processor that calculates an angulation of a radiation beam to the patient in the angiography imaging procedure relative to the table; calculating an angulation of the table; calculating an intersection of the radiation beam relative to a two-dimensional grid; calculating the radiation dose applied at the intersection of the radiation beam to each of the predefined areas of the two-dimensional grid; calculating an orientation of the patient relative to the two-dimensional grid of predefined areas; and creating a graphic display illustrative of an aggregation of the radiation dose applied to each of the predefined areas of the two-dimensional grid for viewing by a user.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: November 1, 2016
    Assignee: General Electric Company
    Inventors: Pierre Guntzer, Vincent Pangon, Evrard Mukuna, Jean-Baptiste Meyer
  • Patent number: 9405017
    Abstract: A method of forming a transistor comprises forming a conducting substrate layer, forming a dielectric layer over the conducting substrate layer, forming a channel over at least a portion of the dielectric layer and forming first and second source/drain regions contacting respective first and second portions of the channel. The channel comprises a thin-film carbon material. The conducting substrate layer, the dielectric layer, the channel and the first and second source/drain regions are formed such that exposure to radiation causes a change in a threshold voltage of the transistor.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: August 2, 2016
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Yu-Ming Lin, Jeng-Bang Yau
  • Patent number: 9268030
    Abstract: An improved thermoluminescence dosimeter (TLD) system, which includes a TLD reader configured to produce data indicative of a radiation exposure, one or more dosimeters comprising a dosimeter substrate coated with a thin layer of a light-absorbing material, a light stimulation source configured to heat the dosimeter using light incident on the dosimeter coating, a light detection system to detect TL emission and an appropriately programmed computer configured to analyze data from the reader and to output data indicative of an extent of radiation exposure.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: February 23, 2016
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Alan Huston, Brian L. Justus
  • Patent number: 9121948
    Abstract: An optically stimulated luminescence (OSL) dosimeter system. An OSL reader configured to produce data indicative of a radiation exposure, one or more OSL dosimeters fabricated from a thermoluminescent material, a light stimulation source configured to stimulate the OSL dosimeter to produce luminescence emissions, and a light-detection system that measures the intensity of such luminescence emissions and converts the electrical signal to a binary string that can be processed by an appropriately programmed computer configured to analyze data from the reader and produce data indicative of an extent of radiation exposure. Dose information is obtained without requiring heating of the dosimeter. The dosimeter can be interrogated multiple times with minimal loss of dose information.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: September 1, 2015
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Barbara A. Marcheschi, Brian L. Justus, Alan L. Huston
  • Patent number: 9068961
    Abstract: A method of testing an earth sample and an apparatus for executing the method are disclosed herein. The method includes the steps of obtaining at least one earth sample. The method also includes the steps of detecting one or more counts of decay from the at least one earth sample. The detected count is at at least one level of radiation decay energy from among a plurality of possible levels of radiation decay energy associated with decay daughters of Radium 226 and/or 228. The method also includes the steps of deriving a level of radiation emission activity of the at least one earth sample based on the one or more counts of decay detected in said detecting step.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: June 30, 2015
    Assignee: Shale Testing Solutions, LLC
    Inventor: Frank O'Connor
  • Patent number: 9057790
    Abstract: A scintillator device includes an optically clear substrate, a scintillator plastic layer overlying the optically clear substrate, and an optically clear polymer layer between the optically clear substrate and the scintillator plastic layer. The optically clear polymer layer can mechanically and optically couple the scintillator plastic layer to the optically clear substrate. Further, the clear polymer layer can be configured to substantially reduce the formation of cracks in the scintillator plastic layer due to thermal expansion, thermal contraction, or a combination thereof, of the scintillator device.
    Type: Grant
    Filed: September 30, 2012
    Date of Patent: June 16, 2015
    Assignee: Saint-Gobain Ceramics & Plastics, Inc.
    Inventors: Louis Perna, Michael L. Bush, Lance J. Wilson
  • Publication number: 20140252230
    Abstract: An improved thermoluminescence dosimeter (TLD) system, which includes a TLD reader configured to produce data indicative of a radiation exposure, one or more dosimeters comprising a dosimeter substrate coated with a thin layer of a light-absorbing material, a light stimulation source configured to heat the dosimeter using light incident on the dosimeter coating, a light detection system to detect TL emission and an appropriately programmed computer configured to analyze data from the reader and to output data indicative of an extent of radiation exposure.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 11, 2014
    Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Alan Huston, Brian L. Justus, Marko Moscovitch
  • Patent number: 8124935
    Abstract: The present invention relates to a procedure for detection of ionizing radiation and its sources whereby living biosensors are spread-out over a terrain to be examined and which are able by the ionizing radiation to stimulate the production of fluorescent substances whereby their fluorescent radiation is detected from the distance.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: February 28, 2012
    Inventor: Heinrich Meurer
  • Publication number: 20110220798
    Abstract: The invention relates to a radiation detector suitable for use in connection with particle therapy applications. The detector comprises at least one set of scintillating optical guides which upon exposure to incident radiation generate scintillating light. The optical guides are arranged in an array, such as in a so-called harp configuration, for detecting a transversal radiation beam profile. The scintillating optical guides are provided in a glass-based material doped with a rare earth dopant. Of particular interest are the rare earth materials: Ytterbium, Holmium, Thulium and Erbium.
    Type: Application
    Filed: November 19, 2009
    Publication date: September 15, 2011
    Applicant: Siemens A/S
    Inventors: Arnd Friedrich Baurichter, Christian Skou Søndergaard, Martin Kristensen, Bjarne Funch Skipper, Kenneth Hansen
  • Patent number: 7988297
    Abstract: Non-rigidly coupled, overlapping, non-feedback optical systems for spatial filtering of Fourier transform optical patterns and image shape characterization comprises a first optical subsystem that includes a lens for focusing a polarized, coherent beam to a focal point, an image input device that spatially modulates phase positioned between the lens and the focal point, and a spatial filter at the Fourier transform pattern, and a second optical subsystem overlapping the first optical subsystem includes a projection lens and a detector. The second optical subsystem is optically coupled to the first optical subsystem.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: August 2, 2011
    Assignee: Look Dynamics, Inc.
    Inventor: Rikk Crill
  • Publication number: 20100200741
    Abstract: This invention provides phosphor-doped fluoroperovskite compounds that are capable of storing at least part of the energy of incident ionizing radiation and releasing at least part of the stored energy upon optical stimulation or heating. Also provided are dosimeters and radiation storage devices comprising the compounds, methods of preparing the compounds, and methods of using the compounds to determine a dose of ionizing radiation or to record and reproduce an ionizing radiation image.
    Type: Application
    Filed: July 7, 2008
    Publication date: August 12, 2010
    Inventors: Christian Josef Dotzler, Andrew Edgar, Grant Victor Mclelland Williams
  • Publication number: 20100090111
    Abstract: Systems, methods, and devices for thermally protecting a scintillator crystal of a scintillation detector are provided. In one example, a thermally-protected scintillator may include a scintillator crystal and a thermal protection element, which may partially surround the scintillator crystal. The thermal protection element may be configured to prevent the scintillator crystal from experiencing a rate of change in temperature sufficient to cause cracking or non-uniform light output, or a combination thereof.
    Type: Application
    Filed: October 5, 2009
    Publication date: April 15, 2010
    Inventors: Christian Stoller, Robert A. Adolph, Bradley Albert Roscoe
  • Publication number: 20100072367
    Abstract: The present invention refers to a procedure for detection of ionizing radiation and its sources whereby living biosensors are spread-out over a terrain to be examined and which are able by the ionizing radiation to stimulate the production of fluorescent substances whereby their fluorescent radiation is detected from the distance. The fluorescence is stimulated from an airborne platform, especially by means of a LIDAR system (light detection and ranging) and additionally, if required, stimulated and detected by a terrestrial platform. The procedure according to the present invention is suitable for example to detect, radiological bombs, atomic explosives and highly enriched uranium or to detect discharged armour-piercing projectiles of depleted uranium (DU) in the environment.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 25, 2010
    Inventor: Heinrich Meurer
  • Patent number: 7592609
    Abstract: Disclosed herein are a thermoluminescent dosimeter for radiation monitoring, comprising LiF doped with Mg, Cu and Si, and a fabrication method thereof. The LiF:Mg,Cu,Si thermoluminescent dosimeter is fabricated by heating a LiF-based thermoluminescent powder material having a composition of LiF mother material, 0.1-0.5 mol % of a Mg compound, 0.001-0.05 mol % of a Cu compound and 0.5-1.3 mol % of a Si compound to a temperature of 900-1200° C. to melt the LiF-based material, cooling the melted material, compression-molding the cooled material, sintering the molded material, cooling the sintered material, and then annealing the cooled material. The thermoluminescent dosimeter has high thermal stability and thus maintains constant thermoluminescence sensitivity even when it is annealed at a high temperature of more than 240° C.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: September 22, 2009
    Assignees: Korea Atomic Energy Research Institute, Korea Hydro & Nuclear Power Co. Ltd.
    Inventors: Jang-Lyul Kim, Jung-Il Lee, Jeong-Sun Yang, Bong-Hwan Kim, Jong-Soo Kim
  • Patent number: 7425705
    Abstract: A TLD reader system has a laser diode that heats a thermoluminescent material causing a hemispherical photon emission that is collected by a ball lens. A filter ensures the ball lens receives and collects a predetermined transmittance value of the photons emitted within a predetermined range of wavelength. The ball lens sends the collected photons via a fiber-optic connection to a detection module. An infrared sensor senses the temperature and monitors the heating profile of the thermoluminescent material. A computer-controlled feedback loop maintains a constant output power from the laser diode.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: September 16, 2008
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: James T. Flournoy, William S. Harris, Jr.
  • Publication number: 20080203303
    Abstract: A single electrode electrochemical/electrospray ionization source using a corona discharge and a method of analyzing a sample using a corona discharge single electrode electrochemical/electrospray ionization source are provided. In the corona discharge single electrode electrochemical/electrospray ionization technique electrons are removed from the metal tip of the device through gases present in the electrospray ion source resulting in electrochemical ionization of the sample of interest. The resulting odd electron sample cation (positive ion mode) or anion (negative ion mode) can then be analyzed by an appropriate technique, such as, for example, a mass spectrometer.
    Type: Application
    Filed: February 27, 2008
    Publication date: August 28, 2008
    Inventors: John R. Lloyd, Sonja Hess
  • Patent number: 7380982
    Abstract: A temperature sensing component enables accurate in situ temperature measurement. The temperature sensing component is disposed within the process chamber. The temperature sensing component has a cavity, in which a transparent cover is disposed over an opening of the cavity. A material is disposed within the cavity of the temperature sensing component, and a sensor is configured to sense a phase change of the material through the transparent cover.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: June 3, 2008
    Assignee: Lam Research Corporation
    Inventor: Shrikant Lohokare
  • Patent number: 7372032
    Abstract: A radiation detection device, system and method is disclosed. A radiation detection badge in accordance with the invention comprises a radiation detection unit placed within a sealed thermoplastic package, wherein the thermoplastic package has a geometric feature that constrains the radiation detection unit to an orientation within the package. A radiation detection badge according to the present invention includes radiation detection units in a plurality of cup structures, sealed them with a plurality of corresponding lid structures. Further, a method of tracking radiation exposure of one or more batches of users is provided.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: May 13, 2008
    Assignee: Radiation Detection Company
    Inventors: Barrie Laing, Robert A. Harvey
  • Patent number: 7348560
    Abstract: A thermoluminescent reader module having a hardened, durable construction has a casing which houses a filter, a ball lens and detection module. After a thermoluminscent material is heated by a laser diode, the ball lens collects the hemispherical photon emissions. The filter is positioned at the front of the casing to ensure the ball lens receives a predetermined transmittance value of the photons emitted from the thermoluminescent material within a predetermined range of wavelength. The ball lens sends the collected photons via a fiber-optic connection to the detection module. The detection module is connected to a CPU for purposes of processing the detected information. The filter, ball lens and detection module are securely attached and mounted within the interior of the casing.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: March 25, 2008
    Assignee: United States of America as represented by the Secretary of the Army
    Inventors: William S. Harris, Jr., James T. Flournoy
  • Patent number: 7067827
    Abstract: The present invention is related to an apparatus and method for irradiating a product package, comprising a radiation source directing a radiation beam along a beam direction towards said product package, conveying means for transporting said product package past said radiation source along a transport path, and reflecting means located on at least one side of the plane formed by said beam direction and said transport path. By adjusting the distance and angle of the reflecting means to the conveyor and beam, and improved dose uniformity ratio is obtained.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: June 27, 2006
    Assignee: Ion Beam Applications S.A.
    Inventors: Jean Louis Bol, Olivier Gregoire, Francis Martin, Benoît Mullier, Frédéric Stichelbaut
  • Patent number: 7026616
    Abstract: A device for performing thermoluminescent dosimetry and a method for making the same is disclosed. A thermoluminescent dosimetry device in accordance with the invention comprises a chip holder for holding thermoluminescent chips in free-space, such that the thermoluminescent chips are capable of being directly addressed after exposure to radiation. The chips are preferably suspended in free-space through support structures which minimize the contact with the thermoluminescent chips. A radiation detection device is preferably fabricated by placing the chip holder and a filter in a cup and thermally scaling a lid to edges of the cup.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: April 11, 2006
    Assignee: Radiation Detection Company
    Inventors: Barrie Anderson Laing, Ronald Orvis Smith, Roland Fielder Hanson, Michael Laurance Smith, Iggoni Sunga Fajardo
  • Patent number: 6765208
    Abstract: A dosimetry method exposes more than one thermoluminescence crystals to radiation without using conventional filters, and reads the energy stored in the crystals by converting the energy to light in a conventional manner, and then filters each crystal output in a different portion of the spectrum generated by the crystals.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: July 20, 2004
    Assignee: Sandia Corporation
    Inventor: Scottie W. Walker
  • Patent number: 6707042
    Abstract: In an apparatus for reading codes of a thermoluminescence detector, a housing including an optical unit is disposed on a base together with a disc-like magazine, which is rotatably supported adjacent the housing and provided with an annular array of recesses receiving the thermoluminescence detectors to be examined. The housing has a side opening through which the magazine extends into the housing, in which a light source is disposed for the homogeneous illumination of the thermoluminescence detectors from one side thereof, A CCD camera is disposed in the housing at the other side of the magazine for recording the illuminescence generated by the detectors when exposed to the light from the light source for determining the radiation exposure of thermoluminescence detectors.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: March 16, 2004
    Assignee: Forschungszentrum Karlscruhe GmbH
    Inventors: Hans-Norbert Brand, Markus Figel
  • Publication number: 20030193027
    Abstract: In an apparatus for reading codes of a thermoluminescence detector, a housing including an optical unit is disposed on a base together with a disc-like magazine, which is rotatably supported adjacent the housing and provided with an annular array of recesses receiving the thermoluminescence detectors to be examined. The housing has a side opening through which the magazine extends into the housing, in which a light source is disposed for the homogeneous illumination of the thermoluminescence detectors from one side thereof, A CCD camera is disposed in the housing at the other side of the magazine for recording the illuminescence generated by the detectors when exposed to the light from the light source for determining the radiation exposure of thermoluminescence detectors.
    Type: Application
    Filed: April 12, 2002
    Publication date: October 16, 2003
    Inventors: Hans-Norbert Brand, Markus Figel
  • Patent number: 6627891
    Abstract: The invention includes a temporal dosimeter. One dosimeter embodiment includes a housing that is opaque to visible light but transparent to ionizing radiation. The dosimeter also includes a sensor for recording dosages of ionizing radiation, a drive mechanism, a power source, and rotatable shields that work together to produce a compound aperture to unveil different portions of the sensor at different times to ionizing radiation. Another dosimeter embodiment includes a housing, a sensor, a shield with an aperture portion, and a linear actuator drive mechanism coupled to the sensor for moving the sensor past the aperture portion. The sensor turns as it moves past the aperture, tracing a timeline record of exposure to ionizing radiation along a helical path on the sensor.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: September 30, 2003
    Assignee: The Regents of the University of California
    Inventors: Benjamin P. Warner, Thomas A. Lopez
  • Patent number: 6452203
    Abstract: A method for monitoring a dose of penetrating radiation absorbed by an object, including the steps of providing the object with a device for absorbing penetrating radiation, including a storage phosphor for storing energy from the penetrating radiation; at predetermined intervals, coupling the storage phosphor to a source of stimulation light in such a way that the stimulation light impinges on the phosphor; activating the source of stimulation light so as to cause the storage phosphor to emit an amount of fluorescent light in proportion to an amount of stored energy; reading the amount of fluorescent light and converting it into an electric signal value; storing electric signal value(s) obtained at the predetermined intervals and processing them so as to evaluate a total amount of radiation absorbed by the object; comparing the total amount with a predefined threshold value for obtaining a difference value; and displaying the difference value on a decentralized display.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: September 17, 2002
    Assignee: Agfa-Gevaert
    Inventors: Luc Struye, Paul Leblans, Peter Willems
  • Patent number: 6300635
    Abstract: An X-gamma dosimeter responsive to low energy values includes X and gamma radiation detectors responding differently in relation to the dose absorbed at low energy. One detector overestimates the dose absorbed with regard to human tissues, while the other detector underestimates the absorbed dose. An electronic processor combines signals supplied by both detectors, the combination being optimized so as to report accurately the dosimetric quantity within a large energy range.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: October 9, 2001
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Andrea Brambilla, Thierry Pochet
  • Patent number: 6172368
    Abstract: An insulated gate field effect transistor dosimeter has a source and drain defining a channel region, a floating gate having a first portion extending over the channel region, and a second, larger portion extending away from said region, a control gate having at least a portion thereof overlapping a first part of the floating gate, and a charging gate overlapping a second part of the floating gate. The area of the second part of the floating gate is much smaller than the area of the first part, and the charging gate is separated from the channel region by the control gate. The dosimeter is charged, before irradiation, by connecting the source, drain and control gate to a common ground and applying a potential difference between the charging gate and the common ground. The charge is supplied to the floating gate by a path which does not require a significant electric stress to be created in the region of the gate oxide and the channel.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: January 9, 2001
    Assignees: Carleton University, Thomson & Nielsen Electronics Ltd.
    Inventors: Nicholas Garry Tarr, Ian Thomson
  • Patent number: 6127685
    Abstract: Disclosed is a dosimeter badge that includes body locator indicia consisting of an icon representing a portion of a human body and indicia, such as a dot, associated therewith to indicate where, on the body, the badge should be worn. This information as to the desired location wherein the badge has been or will be worn is included in the identifying indicia printed on the dosimeter badge. A preferred form of dosimeter badge includes a flat member separated into panels along fold lines.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: October 3, 2000
    Assignee: Landauer, Inc.
    Inventors: R. Craig Yoder, Robert M. Greaney
  • Patent number: 6097033
    Abstract: In a dosimeter probe comprising a housing having two straps and including a cylindrical recess with a central extension a disc-like enclosure with an annular projection forming a circular cavity is disposed and a thermoluminescence detector is received in the cavity. At the open end of the cylindrical recess, the housing has an inwardly projecting annular flange structure which retains the enclosure in the recess and the enclosure is chamfered at the circumference of its disc portion for centering the enclosure with respect to the housing and facilitating insertion into the housing with a fit which provides for light-tight engagement between the enclosure and the housing walls.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: August 1, 2000
    Assignee: GSF-Forschungszentrum fur Umwelt und Gesundheit GmbH
    Inventors: Hans-Norbert Brand, Gunter Krehbiel
  • Patent number: 6005231
    Abstract: A method and apparatus for measuring radiation doses based upon thermoluminescence which occurs when a thermoluminescence element is heated by a heat source after having been exposed to radiation. A heat energy sensor is provided for the heat source for detecting the heat energy output from the heat source toward the element. Based on the detected heat energy, the temperature of the element is calculated. The calculated temperature is used to determined if remedial action is necessary. For instance, the calculated temperature may be compared with a predetermined optimum heating temperature. If the calculated temperature deviates from the predetermined optimum heating temperature, responsive action is taken. An increase rate of the calculated temperature may also be calculated. The calculated increase rate would be compared with a predetermined heating rate.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: December 21, 1999
    Assignee: Matsushita Industrial Equipment Corp. of America
    Inventors: Steven J. Lanovich, Lucian Predescu
  • Patent number: 5990485
    Abstract: A label is provided, comprising a means wherein penetrating radiation leaves a human- or machine-readable semi-permanent or permanent mark. Preferably said means is a storage phosphor. A method for using such a label for checking if an articles has been inspected by penetrating radiation and a method for using such a label as personal monitoring are also provided.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: November 23, 1999
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Peter Willems, Luc Struye, Paul Leblans
  • Patent number: 5818056
    Abstract: A method and apparatus for determining radiation absorbed dose using optically stimulated luminescence (OSL) in dental enamel. The invention is based on the determination that OSL can be induced in dental enamel and can be used for determining absorbed radiation dose, for example during unmonitored x-rays, or accidental exposures to ionizing radiation. In particular, it has been discovered that there is a dose dependent OSL in dental enamel. The present invention makes possible a non-invasive, sensitive, reliable and portable method and apparatus for in vivo human radiation dosimetry.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: October 6, 1998
    Assignee: Dalhousie University
    Inventor: Barry Pass
  • Patent number: 5665972
    Abstract: A method for measuring the fixed contamination level in a confined area such as small diameter pipe. The method measures the accumulated detection response over a given area and prescribed time period. To obtain the measurement a plurality of sensors are connected in tandem to form a flexible detector string and remotely positioned within the area to be monitored. The measurement is correlated to a standard obtained by using a known source in a simulated mockup environment. In one embodiment a passive monitor such as a Thermo-Luminescence Dosimeter is employed as the sensor.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: September 9, 1997
    Assignee: Westinghouse Electric Corporation
    Inventors: Jeffrey W. Dickinson, Charles G. Hudson, Daniel S. Johnson, Richard McGinley, Richard J. Sexton
  • Patent number: 5661310
    Abstract: A dose distribution analyzer (20) and methods for providing a radiation dose map indicating energy of a spacially variable radiation pattern beamed onto a dose map radiation dosimeter (10). The radiation dosimeter (10) is exposed to a proposed spacially variable radiation pattern such as used in a phantom patient for patient radiation dose treatment verification. The dosimeter (10) is subsequently analyzed by the dose distribution analyzer (20). Such analyzer includes a phosphor stimulator (53), an image forming subsystem (38), and an image sensor (37). A dosimeter holder (32) holds the dosimeter near the phosphor stimulator (53). A system controller (22) is connected to receive image data from the image sensor (37) while the dosimeter (10) is stimulated. The controller (22) utilizes the image data to derive a radiation dose map which indicates the distribution of radiation in the spacially variable radiation pattern which strikes the dosimeter (10).
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: August 26, 1997
    Assignee: Keithley Instruments, Inc.
    Inventor: Scott C. Jones
  • Patent number: 5656815
    Abstract: Radiation is detected using a light transparent thermoluminescent dosimeter that comprises a nanocrystalline phosphor dispersed in a light transparent glassy matrix, such as Vycor glass. The dosimeter is placed in an environment in which radiation is present for a period of time, removed from the environment and then heated to emit light, the intensity of which is indicative of the radiation dose. The method of the invention is useful for detecting and recording the dosage of both UV and ionizing radiation. In one embodiment in which the dosimeter is in the form of a flat plate. Ambient .alpha. or .beta. radiation populates traps and, upon heating of the flat dosimeter, the emitted light is guided to the edges of the dosimeter by total internal reflection, where it is detected and recorded.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: August 12, 1997
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Brian L. Justus, Alan L. Huston