Dose Or Dose Rate Measurement Patents (Class 250/370.07)
  • Publication number: 20110121980
    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: Application
    Filed: November 4, 2010
    Publication date: May 26, 2011
    Applicant: Radiation Watch Limited, LLC
    Inventors: Peter Trevor Doughty, Michael John Anderson, David Jeremy Prendergast, Ian Benson
  • Publication number: 20110121188
    Abstract: Methods, systems, devices, and computer program products include positioning single-use radiation internal dosimeters with MOSFETs into a patient to evaluate the radiation dose delivered during a medical procedure or treatment session. The MOSFETs can be unpowered during irradiation.
    Type: Application
    Filed: January 31, 2011
    Publication date: May 26, 2011
    Inventors: Robert D. Black, Steven R. Widener, John Carroll, Gregory Glenwood Mann, Phillip M. Lehman
  • Publication number: 20110102184
    Abstract: The present invention relates to a radiation image capturing system. A radiation detector of a radiation detecting cassette detects a radiation that has passed through a patient, and an accumulated exposed radiation dose calculator calculates an accumulated exposed radiation dose by accumulating radiation image information detected by the radiation detector, at every image capturing. The calculated accumulated exposed radiation dose is transmitted, together with cassette ID information, to a console. In the console, a status determining unit compares the accumulated exposed radiation dose with an allowable accumulated exposed radiation dose for the radiation detecting cassette to determine the status of the radiation detecting cassette, and issues a warning based on the determined status.
    Type: Application
    Filed: January 10, 2011
    Publication date: May 5, 2011
    Applicant: FUJIFILM CORPORATION
    Inventors: Eiichi KITO, Naoyuki Nishino, Yasunori Ohta, Tsuyoshi Tanabe, Takuya Yoshimi, Takeshi Kuwabara, Kazuharu Ueta, Makoto Iriuchijima
  • Patent number: 7935936
    Abstract: This document discusses, among other things, an implantable apparatus comprising a plurality of solid state electronic circuits disposed at a plurality of different locations in the apparatus, a plurality of ionizing radiation exposure sensors disposed at the different locations and configured to generate an indication of a non-single-event-upset (non-SEU) effect to the solid state electronic circuit from an exposure to ionizing radiation, wherein the ionizing radiation exposure sensors respectively monitor at least two different types of operating parameters of respectively correspondingly located solid state circuits, and a controller circuit communicatively coupled to the ionizing radiation exposure sensors, wherein the controller circuit is configured to quantify the effect to the solid state electronic circuits using the different monitored operating parameters.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: May 3, 2011
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: Jeffrey E. Stahmann, William J. Linder, Scott R. Stubbs, Keith R. Maile
  • Publication number: 20110095887
    Abstract: A dosimeter is disclosed for use in container including outer walls defining an interior volume, the dosimeter including: a radon detection element adapted to detect a radon level for the interior volume; a neutron detection element adapted detect a neutron level for the interior volume. The dosimeter is adapted to measure the radon level and neutron level for a period of time, compare the measured radon level to a first threshold, compare the measured neutron level to a second threshold, and determine information indicative of the presence or absence of fissile material within the interior volume based on the comparisons.
    Type: Application
    Filed: February 1, 2008
    Publication date: April 28, 2011
    Inventors: Charles T. Hess, Fred Hewitt Smith
  • Patent number: 7932500
    Abstract: A radiation image detection method including the steps of: detecting from a radiation image detector including multitudes of pixels disposed two-dimensionally, each having a TFT switch, an analog image signal of each pixel flowing out through each data line by sequentially switching ON the TFT switches connected to each scanning line on a scanning line-by-scanning line basis; detecting an analog leak level flowing out through each data line with the TFT switches connected to each of the scanning lines being switched OFF each time before switching ON the TFT switches on a scanning line-by-scanning line basis when converting the detected analog image signal to a digital image signal and outputting; and correcting the analog image signal before being converted to the digital image signal based on the leak level.
    Type: Grant
    Filed: March 30, 2008
    Date of Patent: April 26, 2011
    Assignee: FUJIFILM Corporation
    Inventor: Naoto Iwakiri
  • Patent number: 7923694
    Abstract: Methods, systems, devices, and computer program products include positioning single-use radiation sensor patches that have adhesive means onto the skin of a patient to evaluate the radiation dose delivered during a treatment session. The sensor patches are configured to be minimally obtrusive and operate without the use of externally extending power cords or lead wires.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: April 12, 2011
    Assignee: Sicel Technologies, Inc.
    Inventors: Robert D. Black, Gregory Glenwood Mann, Steven R. Widener, Phillip M. Lehman
  • Publication number: 20110073766
    Abstract: A personal radiation monitor worn by a person who may be exposed to potentially harmful radiation includes a main unit and a radiation sensor cartridge which is matable with and removable from the main unit of the monitor. The removable sensor cartridge includes one or more radiation sensor elements for detecting radiation, and further includes an electronic memory having stored therein calibration and identification information relating to the type of radiation and/or frequency bands of radiation which the sensor or sensors are designed to detect. The sensor cartridge is easily removable from the main unit of the monitor so that one sensor cartridge is interchangeable by the end user with another sensor cartridge.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 31, 2011
    Applicant: L-3 Communications Corporation, Narda Microwave-East
    Inventors: Robert Eugene Johnson, Charles Bryant, James Boncore, John Foglio
  • Publication number: 20110057110
    Abstract: A method for real-time measurement of a local dose received by a region of a target upon bombardment of the target by an incident beam of hadrons generates at least prompt gamma rays and neutrons. The particles emitted by the target are measured by collimating the region of the target and by placing a detector at a distance L from the region of the target to be measured. The detector is linked to a device for particle energy and time-of-flight measurement, in which the number of prompt gamma rays received by the detector is determined by selecting the recorded events, and a two-directional charged-particle detection system, placed in the beam of incident hadrons before the target, is used so as to obtain the transverse position of the incident hadrons in order to provide spatial information about the prompt gamma rays.
    Type: Application
    Filed: May 7, 2009
    Publication date: March 10, 2011
    Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE-CNRS
    Inventors: Etienne Testa, Cedric Ray, Nicolas Freud
  • Publication number: 20110049377
    Abstract: A method for determining parameters of a beam is disclosed. As a part of a 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 represents the values.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 3, 2011
    Inventors: Daniel MORF, Juergen HEESE
  • Publication number: 20110036988
    Abstract: Radiation detector (1) for measuring one or more characteristics of a radiation, comprising one or more detector pixels (3), a clock pulse generator, each detector pixel (3) comprising a sensor (20) producing an electrical signal in response to an event of a photon or charged particle of said radiation impinging on said sensor (20); a pixel electronics (24) adapted for receiving and processing said electrical signal, comprising an analog processing unit (62) for amplifying and shaping said electrical signal and producing a shaped pulse said pixel electronics (24) comprises time determination unit (51) for counting the TOT-count, the TOT-count being the number of clock pulses occurring during the time interval when said shaped pulse is above a threshold. Said pixel electronics comprises a plurality of event counters (82), each event counter (82) counting the number of events having a TOT-count in a predefined ranges.
    Type: Application
    Filed: August 11, 2008
    Publication date: February 17, 2011
    Inventors: Michael Campbell, Xavier Llopart Cudie, Lukas Tlustos, Winnie Sze-Wing Wong, Rafael Ballabriga Sune, Gisela Anton, Thilo Michel, Michael Bohnel, Karl L. Schwartz, Uwe Mollenhauer, Ernst Fritsch
  • Publication number: 20110036987
    Abstract: A dosimeter and an associated method for detecting radiation are provided. A dosimeter includes a complementary pair of transistors, such as a first transistor that is doped in accordance with a first conductivity type, such as an n-doped metal oxide semiconductor field effect transistor (MOSFET) and a second transistor that is doped in accordance with a second conductivity type, different than the first conductivity type, such as a p-doped MOSFET. The first and second transistors may be configured to generate respective outputs that shift in opposite directions in response to radiation. The dosimeter may also include a circuit element configured to determine a measure of the radiation based upon a difference between the respective outputs of the first and second transistors. The circuit element may include an amplifier configured to amplify the difference between the respective outputs of the first and second transistors.
    Type: Application
    Filed: August 14, 2009
    Publication date: February 17, 2011
    Applicant: The Boeing Company
    Inventors: William G. Bartholet, Dorina L. Hester
  • Publication number: 20110024640
    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: Application
    Filed: April 6, 2009
    Publication date: February 3, 2011
    Applicant: MIRION TECHNOLOGIES INC.
    Inventors: Jukka Kahilainen, Thomas Logan
  • Patent number: 7786433
    Abstract: A phantom for quality monitoring of a medical system, in particular a medical therapy system, or particle therapy system, is described. The phantom has a fixation device for coupling the phantom to a positioning device. In an aspect, a method for quality monitoring in a medical system, in particular a medical therapy system or particle therapy system is described, in which such a phantom is coupled via a fixation device to a positioning device and, with the aid of the positioning device, is brought to a predefined position. In another aspect, a particle therapy system has a treatment chamber, with a positioning device to which a phantom can be coupled so that the phantom can be brought to a predefined spatial position using the positioning device.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: August 31, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Konstanze Gunzert-Marx, Sophia Knop, Tim Use
  • Publication number: 20100193695
    Abstract: Radiation dosimeters that are based on carbon materials such as carbon powder, carbon fibers, carbon nanoparticles and carbon nanotubes are developed. The dosimeter may contain a singular element or multiple sensing elements that are arrayed in 1-D, 2-D and 3-D formations. Each sensing element is made up of two electrodes with carbon materials deposited between the electrodes. The sensing elements may be deposited on flexible substrates to create flexible dosimeters. In addition, the carbon sensing materials may be deposited onto transparent substrates to achieve a transparent dosimeter. Transparent and/or flexible dosimeters can be fabricated with the carbon materials. The sensing elements are connected to external power sources. As the elements are exposed to radiation beams, the change in resistivity or conductance of the carbon materials is measured by current detection circuitry.
    Type: Application
    Filed: November 14, 2008
    Publication date: August 5, 2010
    Inventors: John T.W. Yeow, Jiazhi Ma
  • Patent number: 7769137
    Abstract: A portable X-ray detector unit includes a portable, hand-held cassette having exposure detection fields for measuring the level of radiation to which a subject to be imaged is exposed. An Automatic exposure control terminates radiation supplied to a subject when it is determined that the level of exposure exceeds a predetermined threshold as interpreted in the portable detector unit. A user-interface is provided to control the exposure detection fields and/or the automatic exposure control.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: August 3, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Hanns-Ingo Maack, Waldermar Lumma
  • Publication number: 20100187426
    Abstract: The monitoring of UV radiation has received increased attention recently due to the hazards of accelerated skin ageing and even cancer following excessive exposure. Personalized monitoring gives a more accurate reading than crude weather forecasts of the ‘UV index’. This invention answers both these needs in a personal UV monitor that is incorporated into an existing display. Minimal processing changes are made to an existing display in order to achieve this added functionality, which is therefore achieved at little additional cost.
    Type: Application
    Filed: December 22, 2009
    Publication date: July 29, 2010
    Applicant: TPO Displays Corp.
    Inventors: Nigel David Young, Peter Fairley
  • Publication number: 20100176302
    Abstract: Bidimensional dosimetric detector, comprising: a monolithic base-matrix (1) made of homoepitaxial silicon with a surface for exposition to the radiation, a plurality of radiation-sensible junction diodes (2) for producing a plurality of electrical signals in response to the radiation, electrical terminals (3) connected to said diodes for feeding said produced electrical signals to an acquisition and processing unit (5), wherein the perimeter of one or more said diodes is defined by a boundary region of the electrical field of same diode.
    Type: Application
    Filed: June 22, 2007
    Publication date: July 15, 2010
    Inventors: Mara Bruzzi, Marta Bucciolini, Cinzia Talamonti, David Menichelli
  • Publication number: 20100148079
    Abstract: A radiation detector of the ?E-E type is proposed.
    Type: Application
    Filed: February 11, 2010
    Publication date: June 17, 2010
    Applicant: STMicroelectronics. S.r.l.
    Inventors: Giuseppe VALVO, Piero Giorgio Fallica, Stefano Agosteo, Alberto Fazzi
  • Publication number: 20100152521
    Abstract: An in-vivo dose detector (41) for an HDR brachytherapy system (1; 31), wherein the detector is insertable into and movable through a catheter (15), and comprises a sensor (53) operable to detect radiation from a source (52) used to irradiate a tissue to be treated (9) in the course of an HDR brachytherapy treatment. A brachytherapy system and a method of dose monitoring are also disclosed.
    Type: Application
    Filed: July 17, 2007
    Publication date: June 17, 2010
    Applicant: CITY UNIVERSITY
    Inventor: Robert A. Price
  • Publication number: 20100140489
    Abstract: A radiation detector of the ?E-E type is proposed.
    Type: Application
    Filed: February 11, 2010
    Publication date: June 10, 2010
    Applicant: STMicroelectronics, S.r.l.
    Inventors: Giuseppina Valvo, Piero Giorgio Fallica, Stefano Agosteo, Alberto Fazzi
  • Publication number: 20100140488
    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: Application
    Filed: December 8, 2008
    Publication date: June 10, 2010
    Inventors: Angelo Visconti, Mauro Bonanomi, Giorgio Cellere, Alessandro Paccagnella
  • Publication number: 20100133440
    Abstract: This invention relates to a system for determining a biodistribution of radioactive agents in a subject. According to the invention, a detector system comprising two or more detectors arranged to be attached to the subject at localized areas is used for detecting the radiation emitted from the imaging agents at localized tissues within the subject. The measuring results in separate radiation data sets associated to the tissues. The detectors are further being arranged to adapt the measuring rate to the pharmacokinetic behavior of the tissues in order to capture all relevant data points. A processor then uses the data sets for determining the radioactivity within each respective tissue and based thereon the biodistribution within the subject.
    Type: Application
    Filed: November 12, 2007
    Publication date: June 3, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.
    Inventors: Jens-Christoph Georgi, Bernd Schweizer, Heinrich Von Busch
  • Publication number: 20100127181
    Abstract: A radiation sensor array is carried on a flexible sheet of film, for placement on the skin of a patient adjacent to a brachytherapy location beneath the skin. With the array approximately centered on a position where radiation source to skin distance is estimated to be minimum, the array of sensors is used to monitor radiation dose received at the skin. With a controller connected to the array and preferably also to the radiation source in the applicator, the radiation dose received at all skin points of interest can be monitored, a point of maximum dose and a projected approach to limit dose can be calculated, and in response the system can warn the operator or control a brachytherapy procedure so as to discontinue radiation or control the radiation level or source position in real time. The system can also include percutaneous sensors.
    Type: Application
    Filed: January 21, 2009
    Publication date: May 27, 2010
    Inventors: Paul A. Lovoi, Steve Axelrod
  • Publication number: 20100096556
    Abstract: A miniaturized floating gate (FG) MOSFET radiation sensor system is disclosed, The sensor preferably comprises a matched pair of sensor and reference FGMOSFETs wherein the sensor FGMOSFET has a larger area floating gate with an extension over a field oxide layer, for accumulation of charge and increased sensitivity. Elimination of a conventional control gate and injector gate reduces capacitance, and increases sensitivity, and allows for fabrication using standard low cost CMOS technology. A sensor system may be provided with integrated signal processing electronics, for monitoring a change in differential channel current ID, indicative of radiation dose, and an integrated negative bias generator for automatic pre-charging from a low voltage power source. Optionally, the system may be coupled to a wireless transmitter. A compact wireless sensor System on Package solution is presented, suitable for dosimetry for radiotherapy or other biomedical applications.
    Type: Application
    Filed: October 16, 2009
    Publication date: April 22, 2010
    Inventors: Muhammad ARSALAN, Atif SHAMIM, Nicholas Garry TARR, Langis ROY
  • Publication number: 20100090118
    Abstract: A microdosimeter, comprising an array of three-dimensional p-n junction semiconductor detectors, each providing a sensitive volume-target and a tissue equivalent medium for generating secondary charged particles. The array is manufactured from a semiconductor on insulator wafer and the detectors are located to detect secondary charged particles generated in the tissue equivalent medium.
    Type: Application
    Filed: December 19, 2007
    Publication date: April 15, 2010
    Applicant: University of Wollongong
    Inventor: Anatoly Rozenfeld
  • Publication number: 20100072380
    Abstract: Methods and apparatus are described for space charge dosimeters for extremely low power measurements of radiation in shipping containers. A method includes insitu polling a suite of passive integrating ionizing radiation sensors including reading-out dosimetric data from a first passive integrating ionizing radiation sensor and a second passive integrating ionizing radiation sensor, where the first passive integrating ionizing radiation sensor and the second passive integrating ionizing radiation sensor remain situated where the dosimetric data was integrated while reading-out.
    Type: Application
    Filed: March 18, 2009
    Publication date: March 25, 2010
    Inventors: Charles L. Britton, JR., Mark A. Buckner, Gregory R. Hanson, William L. Bryan
  • Patent number: 7659516
    Abstract: An array-based C-MOS sensor device is provided with a facility for on the basis of non-destructive cell readout generating a radiation dose-sensing signal. In particular, the facility is arranged for accessing a subset of multiple distributed C-MOS cells across the array and feeding by such accessed cells an algorithmic means for therein generating an overall feedback dose control signalization and/or an over-all trigger signalization.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: February 9, 2010
    Assignee: DALSA Corporation
    Inventors: Alouisius Wilhelmus Marinus Korthout, Willem Johan De Haan, Adrianus Johannes Mierop
  • Publication number: 20100019137
    Abstract: The present invention is related to a water phantom for measuring and determining the dose distribution of radiation produced by a particle beam or photon radiation beam comprising: a water tank, the water tank having a lower base and side walls; supply means for supplying water to the water tank. The water tank comprises an intermediate base that forms, together with side walls and said lower base, a closed lower tank underneath said intermediate base and an upper tank above said intermediate base, the closed lower tank being connected to the supply means and allowing the flow of water toward said upper tank through a plurality of water admission passages defined in the intermediate base to provide an unturbulent water flow within said water tank 2.
    Type: Application
    Filed: July 22, 2009
    Publication date: January 28, 2010
    Inventors: Juan-Carlos Celi de la Torre, Stefan Reinhold, Roman Harmansa, Rob Plompen
  • Publication number: 20100006764
    Abstract: A dynamic radiation monitor having a detector coupled to a computer to determine at any given location, the amount of time a person has before a pre-selected maximum permissible radiation exposure is received. The device dynamically calculates and outputs the user's permissible stay time for a given area based on a personalized maximum permissible dose, and adjusts in real time the output based on elapsed time and changing exposure rate. The device also provides the user audio and visual feedback such as varying background colors for different stay time ranges.
    Type: Application
    Filed: March 2, 2009
    Publication date: January 14, 2010
    Inventor: Jerrold T. Bushberg
  • Publication number: 20090321650
    Abstract: A radiation detection blanket for use in surveying a broad or irregular area of interest for radiation emissions. Small radiation detectors are affixed to the fabric and distributed relative to its surface area. The detector materials may be of the OSL, TLD, or ERD variety, or may be a combination of OSL, TLD and ERD. Detector materials having varying thicknesses of high Z coatings may be clustered together in the blanket fabric to yield a gamma radiation spectrum. Use of a converter material on the detector material allows the blanket to detect neutron radiation. The blanket includes specialized transmission means for allowing the detector materials to be read individually, by passing the reader along a surface or along an edge of the blanket. A composite radiation measurement is obtained upon reading the individual detectors, allowing determination of the radiation distribution within the object being surveyed by the blanket.
    Type: Application
    Filed: April 22, 2008
    Publication date: December 31, 2009
    Inventors: Steven P. Kadner, Markku J. Koskelo, Robert Craig Yoder
  • Patent number: 7615753
    Abstract: A device for measuring exposure to radiations including at least a component for detecting photons including at least a component for detecting photons or particles associated with at least one circuit for acquiring and counting detection events. The response curve of the number of counted events versus the number of photons or particles sensed by each detection component is a monotonous increasing curve.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: November 10, 2009
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Patrick Audebert, Jean-Pierre Rostaing
  • Patent number: 7608831
    Abstract: A radioactivity dose calibrator system measures the quantity of radioactive material contained in a sample-vial or syringe without removing the vial or syringe from its primary radiation shield. The system comprises a first radiation detector, a second radiation detector, a transportable, shielded radioactive material sample-holder, a signal-processing circuit and a video display.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: October 27, 2009
    Inventors: James F Lamb, Lewis Carroll
  • Publication number: 20090250618
    Abstract: A dosimeter comprising an ionizing radiation detector array is used to generally encompass a three dimensional geometric shape such as that employed as a phantom in radiation dosimetry measurements. The ionizing radiation detector array may include passive or active detectors. The active detectors in the array may comprise diodes, ionization chambers, luminescent sensors or amorphous silicon. The three dimensional geometric shape may comprise a shape defined by a closed directrix, wherein each of a plurality of detectors within the ionizing detector array is within an envelope defined by a generatrix of the directrix. The closed directrix may be an open or closed cylinder, or a structure having a cross section described by a polygon. The plurality of detectors may only be positioned on or at least proximate the envelope.
    Type: Application
    Filed: March 11, 2009
    Publication date: October 8, 2009
    Applicant: Sun Nuclear Corp.
    Inventor: William E. Simon
  • Publication number: 20090252292
    Abstract: A method of determining a patient dose during or prior to therapy from an external radiation beam includes determining a dose distribution from a patient plan as delivered in a QA phantom at each appropriate beam angle and comparing the dose distribution determined from measurements or calculations to a corresponding treatment planning system (TPS) dose modeled distribution in the QA phantom and providing a correction distribution when applied to the TPS dose modeled distribution results in the dose distribution determined. The correction distribution may optionally be interpolated to non-measured points for each beam angle and geometrically projected toward the source of radiation through a volume that equals a dose volume of the TPS for a patient beam for each beam angle. The correction distribution is applied to the TPS patient dose volume for each beam angle for providing a corrected dose distribution in the patient.
    Type: Application
    Filed: March 12, 2009
    Publication date: October 8, 2009
    Applicant: SUN NUCEAR, CORP.
    Inventors: William E. Simon, Benjamin E. Nelms
  • Publication number: 20090250602
    Abstract: Methods, systems, devices, and computer program products include positioning single-use radiation sensor patches that have adhesive means onto the skin of a patient to evaluate the radiation dose delivered during a treatment session. The sensor patches are configured to be minimally obtrusive and operate without the use of externally extending power cords or lead wires.
    Type: Application
    Filed: May 29, 2009
    Publication date: October 8, 2009
    Inventors: Robert D. Black, Gregory Glenwood Mann, Steven R. Widener, Phillip M. Lehman
  • Publication number: 20090236510
    Abstract: A radiation dosimetry apparatus and method use a scintillating optical fiber array for detecting dose levels. The scintillating optical fiber detectors generate optical energy in response to a predetermined type of radiation, and are coupled to collection optical fibers that transmit the optical energy to a photo-detector for conversion to an electrical signal. The detectors may be embedded in one or more modular, water-equivalent phantom slabs. A repeatable connector couples the collection fibers to the photo-detector, maintaining the fiber ends in a predetermined spatial relationship. The detector fibers may be distributed as desired in a three-dimensional detection space, and may be oriented with their longitudinal axes at different orientations relative to a transmission axis of an incident radiation beam. A calibration method uses two measurements in two spectral windows, one with irradiation of the scintillator at a known dose and one with only irradiation of the collection fiber.
    Type: Application
    Filed: November 21, 2008
    Publication date: September 24, 2009
    Applicant: UNIVERSITE LAVAL
    Inventors: Frederic Lacroix, Luc Beaulieu, Sam Beddar, Mathieu Guillot, Luc Gingras, Louis Archambault
  • Patent number: 7582875
    Abstract: A monolithic active pixel dosimeter, provided with at least a sensing cell, having at least a junction sensing element. The junction sensing element includes a sensing region, having a first type of conductivity, and a charge collecting region, contiguous to the sensing region and having a second type of conductivity. The sensing cell further includes an ohmic region at least partially overlapping and extending laterally outside the charge collecting region, and an annular insulating region, abutting the ohmic region, so as to form an insulating junction surrounding both the ohmic region and the charge collection region.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: September 1, 2009
    Assignees: Universitaet Karlsruhe., Akademia Gomiczo-Hutnicza, Université Louis Pasteur, Centre National de la Recherche Scientifique, Institute of Electron Technology, Fondazione per Adroterapia Oncologica - Tera, Universite' de Geneve, Instytut Fizyki Jadrowej Im H Niewodniczanskiego
    Inventors: Massimo Caccia, Leopoldo Conte, Mario Alemi, Chiara Cappellini, Antonello Luigi Airoldi, Carla Bianchi, Raffaele Novario, Wim De Boer, Eugene Grigoriev, Halina Niemiec, Wojciech Kucewicz, Francesco Cannillo, Gilles Clauss, Claude Colledani, Grzegorz Deptuch, Wojciech Dulinski, Piotr Grabiec, Jacek Marczewski, Krzysztof Domanski, Bohdan Jaroszewicz, Krzysztof Kucharski, Laura Badano, Omella Ferrando, Georg Popowski, Agnieszka Zalewska, Adam Czermak
  • Publication number: 20090212226
    Abstract: Methods and apparatus are described for space charge dosimeters for extremely low power measurements of radiation in shipping containers. A method includes insitu polling a suite of passive integrating ionizing radiation sensors including reading-out dosimetric data from a first passive integrating ionizing radiation sensor and a second passive integrating ionizing radiation sensor, where the first passive integrating ionizing radiation sensor and the second passive integrating ionizing radiation sensor remain situated where the dosimetric data was integrated while reading-out.
    Type: Application
    Filed: March 18, 2009
    Publication date: August 27, 2009
    Inventors: Charles L. Britton, JR., Mark A. Buckner, Gregory R. Hanson, William L. Bryan
  • Publication number: 20090200476
    Abstract: The present invention relates to a dosimetry device for verification of quality of a radiation beam in standard and conformal radiation therapy, and for IMRT (Intensity Modulated Radiation Therapy) applications. The device includes an active area comprising individual radiation detectors. The active area comprises a limited number of lines of radiation detectors, and a number of extra radiation detectors dedicated to the energy measurement of electrons or photons. It also comprises a build-up plate with energy degraders. The energy degraders are located upstream from the extra radiation detectors in the path of the radiation beam.
    Type: Application
    Filed: July 27, 2006
    Publication date: August 13, 2009
    Inventors: Caterina Brusasco, Flavio Marchetto
  • Publication number: 20090189082
    Abstract: This document discusses, among other things, an implantable apparatus comprising a solid state electronic circuit and a sensor. The sensor is configured to detect an exposure of the solid state electronic circuit to ionizing radiation, and generate an indication of a non-single-event-upset (non-SEU) effect to the solid state electronic circuit from the exposure to ionizing radiation.
    Type: Application
    Filed: January 29, 2009
    Publication date: July 30, 2009
    Inventors: Jeffrey E. Stahmann, William J. Linder, Scott R. Stubbs, Keith R. Maile
  • Patent number: 7557353
    Abstract: Methods, systems, devices, and computer program products include positioning disposable single-use radiation sensor patches that have adhesive means onto the skin of a patient to evaluate the radiation dose delivered during a treatment session. The sensor patches are configured to be minimally obtrusive and operate without the use of externally extending power chords or lead wires.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: July 7, 2009
    Assignee: Sicel Technologies, Inc.
    Inventors: Robert D. Black, Gregory Glenwood Mann, Steven R. Widener, Phillip M. Lehman
  • Patent number: 7554090
    Abstract: A method and an apparatus for dose-guided radiotherapy for a patient (P) having an identified radiotherapy target utilizes a radiation detecting array (R) of radiation-sensitive dosimeters for the real-time remote measurement of radiotherapy at the radiation detecting array (R). The radiation detecting array is positioned within the patient's (P) body along the treatment path before or after the identified radiotherapy target or the device may be positioned beyond the patient (P) to measure transit dose. A radiation source (A) for emitting radiation for radiotherapy along a treatment path through the patient (P) to the identified radiotherapy target is utilized. The method includes generating a predicted dose pattern of radiation at the placed radiation detecting array (R). The predicted dose pattern assumes an on-target radiation source (A) emitting the radiotherapy beam along the treatment path through the patient (P) to the identified radiotherapy target.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: June 30, 2009
    Assignees: The United States of America as represented by the Department of Health and Human Services, The United States of America as represent by the Secretary of the Navy
    Inventors: C. Norman Coleman, Robert Miller, Rosemary Altemus, Holly Ning, Alan Lee Huston, Brian L. Justus, Paul Falkenstein
  • Publication number: 20090146068
    Abstract: A personal X-ray dosimeter system, comprising a portable detector (100) and a reader device (114). The portable detector (100) comprises an array (104) of programmed non-volatile memory elements (102) and a scintillator element (106) for converting a portion of X-radiation incident thereon to UV radiation. As a result of exposure to X-radiation (112) not converted to UV radiation, some of the memory elements (102) will have the charge on their floating gates, thereby causing a corresponding shift in threshold voltage (VT). After some exposure time, the reader device (114) reads from the detector (100) data representative of the number of VT shifted memory elements (102), and determines therefrom using predetermined calibration curves, the radiation dose (122) to which the user has been exposed.
    Type: Application
    Filed: November 17, 2005
    Publication date: June 11, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventor: Prabhat Agarwal
  • Publication number: 20090140154
    Abstract: The invention relates to a vibration dosimeter (2) and a method for determining the daily vibrational loading of persons who are exposed to mechanical oscillations at their place of work due to the operation of a work means and in particular of a manually operated electronic tool (4, 6). What is provided is that the dosimeter (2) comprises a determination device (12, 18) for determining the effective daily operating duration of the work means (4, 6), a computer device (22) for calculating a daily work time until a specified trigger value or exposition limit value of the vibrational loading is reached from a work-means-typical vibration value and the trigger value or exposition limit value, and a comparison device (24) for comparing the determined effective daily operating duration of the work means with the calculated daily work time until the specified trigger value is reached.
    Type: Application
    Filed: January 15, 2007
    Publication date: June 4, 2009
    Inventors: Markus Roth, Andreas Strasser
  • Patent number: 7538329
    Abstract: The presently claimed and disclosed inventions relate, in general, to methods of radiation dosimetry and imaging using scintillation luminescence. More particularly, materials having a scintillation luminescence response to radiation that varies with total radiation dose received can be used for dosimetry monitoring, including, but not limited to nanoparticles for in vivo, real-time dosimetry. Energy-transfer nanocomposite materials as well as methods of making and using such materials in various applications including, but not limited to, in vivo radiation dosimetry and imaging, are disclosed. More particularly, the presently claimed and disclosed inventions relate to nanoparticle scintillation luminescence particles encapsulated in hosts of the general formula BaFX and BaFX:Eu2+ where X=Cl, Br and I.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: May 26, 2009
    Assignee: Nomadics, Inc.
    Inventors: Wei Chen, Shaopeng Wang, Sarah Westcott, Jun Zhang
  • Publication number: 20090127469
    Abstract: Methods, systems, devices, and computer program products include positioning disposable single-use radiation sensor patches that have adhesive means onto the skin of a patient to evaluate the radiation dose delivered during a treatment session. The sensor patches are configured to be minimally obtrusive and operate without the use of externally extending power chords or lead wires.
    Type: Application
    Filed: January 26, 2009
    Publication date: May 21, 2009
    Inventors: Steven R. Widener, John Carroll
  • Publication number: 20090127468
    Abstract: A method of spectrometric photon dosimetry for integrally and nuclide-specifically determining a gamma dose rate for X-ray and gamma radiation. The method includes measuring a spectrum in at least one energy group or at least one interval group. The pulse height distribution is with a spectrometer and a pulse height analyzer. The number of channels of the spectrometer is such that a map of the pulse height distribution at a requisite resolution over an energy can be made. The measured pulse height distribution is converted into a photon spectrum using a deconvolution procedure that uses response functions having the same energy resolution as the pulse height distribution. The dose spectrum is calculated using dose conversion factors that are energy-dependent and related to the mean energy of a respective corresponding energy interval. The integral dose or dose rate is determined by summing the dose spectrum.
    Type: Application
    Filed: April 26, 2006
    Publication date: May 21, 2009
    Inventor: Georg Fehrenbacher
  • Publication number: 20090121144
    Abstract: Methods, systems, devices, and computer program products include positioning single-use radiation internal dosimeters with MOSFETs into a patient to evaluate the radiation dose delivered during a medical procedure or treatment session. The MOSFETs can be unpowered during irradiation.
    Type: Application
    Filed: January 15, 2009
    Publication date: May 14, 2009
    Applicant: Sicel Technologies, Inc.
    Inventors: Robert D. Black, Steven R. Widener, John Carroll, Gregory Glenwood Mann, Phillip M. Lehman
  • Patent number: 7504636
    Abstract: A radiation detection apparatus for use in noisy environments in which radiation detection and external noise generate interaction event pulses. A first interaction pulse initiates a following time interval during which the effect of received interaction event pulses is minimized. For example, the interaction event pulses produced by noise are not counted if they occur during the time interval.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: March 17, 2009
    Assignee: XRF Corporation
    Inventor: Larry K. Baxter