Patents by Inventor Herfried Karl Wieczorek

Herfried Karl Wieczorek has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10101471
    Abstract: The invention relates to a characterization apparatus (1) for characterizing scintillator material (3) especially for a PET detector. A first radiation source (2) irradiates the scintillator material with first radiation (4) having a wavelength being smaller than 450 nm. Then, a second radiation source (5) irradiates the scintillator material with pulsed second radiation (6) having a wavelength being larger than 600 nm and having a pulse duration being equal to or smaller than 50 s, wherein a detection device (9) detects third radiation (12) from the scintillator material (3) during and/or after the irradiation by the second radiation. The third radiation depends on the amount of charge carriers trapped at electronic defects of the scintillator material such that it can be used as an indicator for the amount of electronic defects and hence for characterizing the scintillator material. This characterization can be performed relatively fast and in a relatively simple way.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: October 16, 2018
    Assignees: KONINKLIJKE PHILIPS N.V., IOFFE PHYSICAL TECHNICAL INSTITUTE
    Inventors: Herfried Karl Wieczorek, Cornelis Reinder Ronda, Hans-Aloys Wischmann, Pavel Georgiyevich Baranov, Gaik Asatrian, Danil Olegovich Tolmachev
  • Publication number: 20180277608
    Abstract: The invention relates to a method for producing a radiation detector used to detect ionizing radiation including a first inorganic-organic halide Perovskite material (24) as a direct converter material and/or as a scintillator material in a detector layer and to a radiation detector comprising a detector layer (24) produced by means of the steps of the method. In order to provide an approach for producing a thick layer (e.g. above 10 ???) of Perovskite material suitable for a radiation detector, it is proposed to grow the material selectively on a seeding layer (23), yielding in a thick polycrystalline layer. One suitable seeding layer (23) to grow lead Perovskite material is made of a bromide Perovskite material.
    Type: Application
    Filed: September 16, 2016
    Publication date: September 27, 2018
    Inventors: HERBERT LIFKA, JOANNA MARIA ELISABETH BAKEN, REINDER COEHOORN, PAULUS ALBERTUS VAN HAL, HERFRIED KARL WIECZOREK, HELGA HUMMEL, CORNELIS REINDER RONDA, MATTHIAS SIMON
  • Publication number: 20180275289
    Abstract: A radiation detector for combined detection of low-energy radiation quanta and high-energy radiation quanta, the radiation detector (8) having a multi-layered structure, comprising: a rear scintillator layer (5) configured to emit a burst of scintillation photons responsive to a high-energy radiation quantum being absorbed by the rear scintillator layer (5); a rear photosensor layer (6) attached to a back side of the rear scintillator layer (5), said rear photosensor layer (6) configured to detect scintillation photons generated in the rear scintillator layer (5); a front scintillator layer (3) arranged in front of the rear scintillator layer (5) opposite the rear photosensor layer (6), said front scintillator layer (3) configured to emit a burst of scintillation photons responsive to a low-energy radiation quantumbeing absorbed by the front scintillator layer (3); and a front photosensor layer (2) attached to a front side of the front scintillator layer (3) opposite the rear scintillator layer (5), said fron
    Type: Application
    Filed: October 14, 2016
    Publication date: September 27, 2018
    Inventors: Johannes Wilhelmus Maria JACOBS, Jorrit JORRITSMA, Heidrun STEINHAUSER, Onno Jan WIMMERS, Peter Lex ALVING, Herman STEGEHUIS, Herfried Karl WIECZOREK
  • Patent number: 9958556
    Abstract: The present invention relates to a direct conversion radiation detector for wherein the direct conversion material comprises a garnet with a composition of Z3(AlxGay)O12:Ce, wherein Z is Lu, Gd, Y, Tb or combinations thereof and wherein y is equal to or greater than x; and preferably Z comprises Gd. Suitable garnets directly convert radiation, such as x-rays or gamma-rays, into electronic signals. Preferably photoluminescence of the garnet is low or absent. The detector is particularly suitable for use in x-ray imaging devices, such as computed tomography. In some embodiments photoluminescence of garnets might be used to construct a hybrid direct-indirect conversion detector, which may be particularly suitable for use with Time-of-Flight PET.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: May 1, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Frank Verbakel, Cornelis Reinder Ronda, Herfried Karl Wieczorek
  • Publication number: 20180106910
    Abstract: The present invention relates to a direct conversion radiation detector for wherein the direct conversion material comprises a garnet with a composition of Z3(AlxGay)O12:Ce, wherein Z is Lu, Gd, Y, Tb or combinations thereof and wherein y is equal to or greater than x; and preferably Z comprises Gd. Suitable garnets directly convert radiation, such as x-rays or gamma-rays, into electronic signals. Preferably photoluminescence of the garnet is low or absent. The detector is particularly suitable for use in x-ray imaging devices, such as computed tomography. In some embodiments photoluminescence of garnets might be used to construct a hybrid direct-indirect conversion detector, which may be particularly suitable for use with Time-of-Flight PET.
    Type: Application
    Filed: June 28, 2016
    Publication date: April 19, 2018
    Inventors: Frank VERBAKEL, Cornelis Reinder RONDA, Herfried Karl WIECZOREK
  • Patent number: 9784850
    Abstract: A multimodal imaging apparatus (1a, 1b) including scintillator elements (31) for capturing incident gamma quanta (25, 61) and for emitting scintillation photons (26) in response to said captured gamma quanta (25, 61). Photosensitive elements (33) capture the emitted scintillation photons (26) and determine a spatial distribution of the scintillation photons. The imaging apparatus (1a, 1b) is configured to be switched between a first operation mode for detecting low energy gamma quanta and a second operation mode for detecting high energy gamma quanta. The scintillator elements are arranged to capture incident gamma quanta (25, 61) from the same area of interest (65) in both operation modes. The scintillator elements (31) include a first region with high energy scintillator elements (27) for capturing high energy gamma quanta and a second region with low energy scintillator elements (29) for capturing low energy gamma quanta.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: October 10, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Pedro Jorge Da Silva Rodrigues, Andreia Maria Araujo Trindade Rodrigues, Herfried Karl Wieczorek, Gereon Vogtmeier
  • Patent number: 9777214
    Abstract: A ceramic or polycrystalline scintillator composition is represented by the formula (LuyGd3-y)(GaxAl5-x)O12:Ce; wherein y=1±0.5; wherein x=3±0.25; and wherein Ce is in the range 0.01 mol % to 0.7 mol %. The scintillator composition finds application in the sensitive detection of ionizing radiation and may for example be used in the detection of gamma photons in the field of PET imaging.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: October 3, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Herfried Karl Wieczorek, Cornelis Reinder Ronda, Jacobus Gerardus Boerekamp, Anne-Marie Andree Van Dongen, Sandra Johanna Maria Paula Spoor, Daniela Buettner, Wilhelmus Cornelis Keur
  • Patent number: 9753152
    Abstract: A radiation detection device detects gamma or x-ray radiation quanta with improved timing accuracy and improved energy resolution. The radiation detection device finds application in the detection of gamma and x-ray radiation and may be used in the field of PET imaging, and in spectral CT. The radiation detection device includes a semiconductor scintillator element and a photodetector. The photodetector is in optical communication with the scintillator element. The scintillator element has two mutually opposing faces; a cathode is in electrical communication with one of the two faces and an anode is in electrical communication with the other of the two faces.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: September 5, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Herfried Karl Wieczorek, Cornelis Reinder Ronda, Lars Reine Wallenberg, Maria Elise Messing, Staffan Hansen, Bjoern John Andres Oehrstrand, Anna Helmi Caroline Lindberg, Niklas Goesta Ehrlin, Robert Tommy Hallberg
  • Patent number: 9753156
    Abstract: The invention relates to a detector (6) for detecting radiation, especially x-ray radiation used in a computed tomography system. The detector comprises a direct conversion material (9) for converting radiation into electrons and holes, which are used for generating an electrical detection signal. The direct conversion material is illuminated with illumination light being broadband visible and/or broadband infrared light for reducing, in particular, eliminating, a polarization of the direct conversion material, which may occur when being traversed by the radiation to be detected and which may reduce the detection performance. By reducing the polarization of the direct conversion material the detection performance can be improved.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: September 5, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Frank Verbakel, Klaus Juergen Engel, Antonius Johannes Maria Nellissen, Herfried Karl Wieczorek, Eric Cornelius Egbertus Van Grunsven, Ira Micah Blevis, Roger Steadman Booker
  • Publication number: 20170205515
    Abstract: The invention relates to a characterization apparatus (1) for characterizing scintillator material (3) especially for a PET detector. A first radiation source (2) irradiates the scintillator material with first radiation (4) having a wavelength being smaller than 450 nm. Then, a second radiation source (5) irradiates the scintillator material with pulsed second radiation (6) having a wavelength being larger than 600 nm and having a pulse duration being equal to or smaller than 50 s, wherein a detection device (9) detects third radiation (12) from the scintillator material (3) during and/or after the irradiation by the second radiation. The third radiation depends on the amount of charge carriers trapped at electronic defects of the scintillator material such that it can be used as an indicator for the amount of electronic defects and hence for characterizing the scintillator material. This characterization can be performed relatively fast and in a relatively simple way.
    Type: Application
    Filed: July 10, 2015
    Publication date: July 20, 2017
    Applicants: KONINKLIJKE PHILIPS N.V., IOFFE PHYSICAL TECHNICAL INSTITUTE
    Inventors: Herfried Karl WIECZOREK, Cornelis Reinder RONDA, Hans-Aloys WISCHMANN, Pavel Georgiyevich BARANOV, Gaik ASATRIAN, Danil Olegovich TOLMACHEV
  • Patent number: 9598638
    Abstract: A gamma photon detector for detecting 511 keV PET radiation includes a scintillator host material doped with cerium. The cerium is present in a concentration of 0.1 to 1.0 mol %. Lower concentrations increase light output but also decay times which can lead to pile up issues. The higher light output enables the read out area to be decreased which reduces the pile up issues. Embodiments with a cerium concentration as low as 0.15 to 0.2 mol % and a read out area as low as 0.1 cm2 are contemplated.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: March 21, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Cornelis Reinder Ronda, Jacobus Gerardus Boerekamp, Sandra Johanna Maria Paula Spoor, Anne-Marie Andree Van Dongen, Herfried Karl Wieczorek, Wilhelmus Cornelis Keur
  • Patent number: 9599724
    Abstract: A gamma radiation detection device (1) includes a scintillator element (2) and an optical detector (3) in optical communication with the scintillator element (2). A plurality of particles or voids (5) are dispersed in the scintillator element (2) which scatter the scintillation light (7), reducing the trapping of scintillation light (7) by multiple reflections.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: March 21, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Herfried Karl Wieczorek, Cornelis Reinder Ronda, Jacobus Gerardus Boerekamp
  • Publication number: 20160312117
    Abstract: The present invention relates to a ceramic or polycrystalline scintillator composition represented by the formula (LUy-Gd3-y)(GxAI5-x)O12: Ce; wherein y=1±0.5; wherein x=3±0.25; and wherein Ce is in the range 0.01 mol % to 0.7 mol %. The scintillator composition finds application in the sensitive detection of ionizing radiation and may for example be used in the detection of gamma photons in the field of PET imaging.
    Type: Application
    Filed: December 16, 2014
    Publication date: October 27, 2016
    Inventors: Herfried Karl WIECZOREK, Cornelis Reinder RONDA, Jacobus Gerardus BOEREKAMP, Anne-Marie Andree VAN DONGEN, Sandra Johanna Maria Paula SPOOR, Daniela BUETTNER, Wilhelmus Cornelis KEUR
  • Publication number: 20160209515
    Abstract: The present invention relates to a multimodal imaging apparatus (1a, 1b) for imaging a process (63) in a subject (23), said process (63) causing the emission of gamma quanta (25, 61), said apparatus (1a, 1b) comprising a scintillator (3) including scintillator elements (31) for capturing incident gamma quanta (25, 61) generated by the radiotracer and for emitting scintillation photons (26) in response to said captured gamma quanta (25, 61), a photodetector (5) including photosensitive elements (33) for capturing the emitted scintillation photons (26) and for determining a spatial distribution of the scintillation photons, and a readout electronics (7) for determining the impact position of an incident gamma quantum in the scintillator (3) and/or a parameter indicative of the emission point of the gamma quantum (25, 61) in the subject (23) based on the spatial distribution of the scintillation photons, wherein the imaging apparatus (1a, 1b) is configured to be switched between a first operation mode for detect
    Type: Application
    Filed: September 18, 2014
    Publication date: July 21, 2016
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Pedro Jorge DA SILVA RODRIGUES, Andreia Maria Araujo TRINDADE RODRIGUES, Herfried Karl WIECZOREK, Gereon VOGTMEIER
  • Publication number: 20160131769
    Abstract: The present invention relates to a radiation detection device for detecting gamma or x-ray radiation quanta with improved timing accuracy and improved energy resolution. The radiation detection device finds application in the detection of gamma and x-ray radiation and may be used in the field of PET imaging, and in spectral CT. The radiation detection device includes a semiconductor scintillator element and a photodetector. The photodetector is in optical communication with the scintillator element. The scintillator element has two mutually opposing faces; a cathode is in electrical communication with one of the two faces and an anode is in electrical communication with the other of the two faces.
    Type: Application
    Filed: June 26, 2014
    Publication date: May 12, 2016
    Inventors: Herfried Karl WIECZOREK, Cornelis Reinder RONDA, Lars Reine WALLENBERG, Maria Elise MESSING, Staffan HANSEN, Bjoern John Andres OEHRSTRAND, Anna Helmi Caroline LINDBERG, Niklas Goesta EHRLIN, Robert Tommy HALLBERG
  • Publication number: 20160109587
    Abstract: The present invention relates to a gamma radiation detection device (1). The gamma radiation detection device (1) comprises a scintillator element (2) and an optical detector (3) in optical communication with the scintillator element (2). A plurality of particles or voids (5) are dispersed in the scintillator element (2) which scatter the scintillation light (7), reducing the trapping of scintillation light (7) by multiple reflections.
    Type: Application
    Filed: April 23, 2014
    Publication date: April 21, 2016
    Inventors: Herfried Karl WIECZOREK, Cornelis Reinder RONDA, Jacobus Gerardus BOEREKAMP
  • Patent number: 9315726
    Abstract: The present invention relates to mixed oxide materials, methods for their preparation, detectors for ionizing radiation and CT scanners. In particular, a mixed oxide material is proposed having the formula (YwTbx)3Al5-yGayO12:Cez, wherein 0.01?w?0.99, 0.01?x?0.99, 0?y?3.5 and 0.001?z?0.10 and wherein w+x+3*z=1, whereby the mixed oxide material is doped with at least 10 ppm V.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: April 19, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Cornelis Reinder Ronda, Jacobus Gerardus Boerekamp, Daniela Buettner, Anne-Marie Andree Van Dongen, Herfried Karl Wieczorek, Sandra Johanna Maria Paula Spoor, Silvan Djohan, Wilhelmus Cornelis Keur
  • Publication number: 20160024380
    Abstract: The present invention relates to mixed oxide materials, methods for their preparation, detectors for ionizing radiation and CT scanners. In particular, a mixed oxide material is proposed having the formula (Yw Tbx)3Al5-y GayO12:Cez, wherein 0.01?w?0.99, 0.01?x?0.99, 0?y?3.5 and 0.001?z?0.10 and wherein w+x+3*z=1, whereby the mixed oxide material is doped with at least 10 ppm V.
    Type: Application
    Filed: March 21, 2014
    Publication date: January 28, 2016
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Cornelis Reinder RONDA, Jacobus Gerardus BOEREKAMP, Daniela BUETTNER, Anne-Marie Andree VAN DONGEN, Herfried Karl WIECZOREK, Sandra Johanna Maria Paula SPOOR, Silvan DJOHAN, Wilhelmus Cornelis KEUR
  • Publication number: 20150362604
    Abstract: The invention relates to a detector (6) for detecting radiation, especially x-ray radiation used in a computed tomography system. The detector comprises a direct conversion material (9) for converting radiation into electrons and holes, which are used for generating an electrical detection signal. The direct conversion material is illuminated with illumination light being broadband visible and/or broadband infrared light for reducing, in particular, eliminating, a polarization of the direct conversion material, which may occur when being traversed by the radiation to be detected and which may reduce the detection performance. By reducing the polarization of the direct conversion material the detection performance can be improved.
    Type: Application
    Filed: February 28, 2014
    Publication date: December 17, 2015
    Inventors: Frank VERBAKEL, Klaus Juergen ENGEL, Antonius Johannes Maria NELLISSEN, Herfried Karl WIECZOREK, Eric Cornelis Egbertus VAN GRUNSVEN, Ira Micah BLEVIS, Roger STEADMAN BOOKER
  • Publication number: 20150301199
    Abstract: The present invention relates to a photon counting X-ray detector and detection method that effectively suppress polarization even under high flux conditions.
    Type: Application
    Filed: November 20, 2013
    Publication date: October 22, 2015
    Inventors: Antonius Johannes Maria NELLISSEN, Frank VERBAKEL, Johan Hendrik KLOOTWIJK, Herfried Karl WIECZOREK