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).

  • Publication number: 20150275080
    Abstract: The present invention relates to a scintillator material comprising a scintillator host material doped with cerium. The scintillator host material is at least one of the group comprising i) garnets ii) CaGa2S4 iii) SrGa2S4 iv) BaGa2S4 v) CaS vi) SrS; and the amount of ceriumis controlled in the range 0.1 mol % to 1.0 mol %. The material may be used in gamma photon detection, in a gamma photon detector and as such in a PET imaging system.
    Type: Application
    Filed: October 31, 2013
    Publication date: October 1, 2015
    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: 9110174
    Abstract: A pixellated detector with an enhanced structure enables easy pixel identification even with high light output at crystal edges. A half-pixel shift between scintillator crystals (50) and detector pixels (12) enables the identification of a crystal (50) from four detector pixels (12) instead of nine pixels in case of optical crosstalk. Glass plates without any mechanical structuring may be used as a common substrate (60) for detectors and scintillators.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: August 18, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Herfried Karl Wieczorek, Andreas Thon
  • Patent number: 9012854
    Abstract: When employing specular reflective material in a scintillator crystal array, light trapping in the crystal due to repetitive internal reflection is mitigated by roughening at least one side (16) of each of a plurality of pre-formed polished scintillator crystals. A specular reflector material (30) is applied (deposited, wrapped around, etc.) to the roughened crystals, which are arranged in an array. Each crystal array is coupled to a silicon photodetector (32) to form a detector array, which can be mounted in a detector for a functional scanner or the like.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: April 21, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Herfried Karl Wieczorek, Andreas Thon, Steven Cooke
  • Patent number: 9012856
    Abstract: A gantry free nuclear imaging system (10) images a region of interest (ROI) (16). The system (10) includes one or more radiation detectors (20) generating radiation data indicating the location of gamma photon strikes. The system includes a reconfigurable frame (22) positioning the radiation detectors (20) at fixed viewing angles of the ROI (16) and at least one processor (44, 48). The processor (44, 48) receives the radiation data from the radiation detectors (20) and reconstructs an image of the ROI (16) from the received radiation data.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: April 21, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Herfried Karl Wieczorek, Jinghan Ye, Lingxiong Shao, Rizwan Hassan
  • Patent number: 8975588
    Abstract: An optical device (102) configured for concentrating light towards a target element (104) is provided. The optical device (102) comprises a waveguide element (106) configured for guiding light towards the target element (104), and a wavelength conversion element (108) configured for converting incoming light of a first wavelength into outgoing light of a second wavelength. The wavelength conversion element (108) extends adjacent to the waveguide element (106). An interface (114) between the waveguide element (106) and the wavelength conversion element (108) comprises a surface roughness. The latter may provide for an in creased efficiency and low manufacturing costs of the optical device (102).
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: March 10, 2015
    Assignee: Koninklijke Philips N.V.
    Inventor: Herfried Karl Wieczorek
  • Publication number: 20140343412
    Abstract: A whole body SPECT system (10) includes a patient support (14) and a static gantry (12) which includes a plurality of rings (40a,40b,40c) of radiation detectors (42). The patient support (14) supports a patient and moves the patient in an axial direction (18) through the static gantry (12). One or more processors (20,24,32) connected to the plurality of detectors records strikes of gamma photons in the radiation detectors (42) and reconstruct the recorded strikes of the gamma photons into a whole body image.
    Type: Application
    Filed: November 15, 2012
    Publication date: November 20, 2014
    Inventors: Herfried Karl Wieczorek, Jinghan Ye, Lingxiong Shao
  • Publication number: 20140319360
    Abstract: A gantry free nuclear imaging system (10) images a region of interest (ROI) (16). The system (10) includes one or more radiation detectors (20) generating radiation data indicating the location of gamma photon strikes. The system includes a reconfigurable frame (22) positioning the radiation detectors (20) at fixed viewing angles of the ROI (16) and at least one processor (44, 48). The processor (44, 48) receives the radiation data from the radiation detectors (20) and reconstructs an image of the ROI (16) from the received radiation data.
    Type: Application
    Filed: November 12, 2012
    Publication date: October 30, 2014
    Inventors: Herfried Karl Wieczorek, Jinghan Ye, Lingxiong Shao, Rizwan Hassan
  • Patent number: 8781198
    Abstract: When reconstructing low-collimation nuclear scan data (18) (e.g., SPECT) into a nuclear image volume (19), a spatial frequency-dependent (SFD) filter function is applied in Fourier space to the reconstructed image (19) to improve image resolution given a predefined number of reconstruction iterations and/or to reduce the number of reconstruction iterations required to achieve a predetermined level of image resolution. Size of an object to be imaged is determined, and the SFD filter function is determined or generated based on signal power spectrum (and/or modulated transfer function) data, object size, and desired image quality (or number of reconstruction iterations). The SFD filter function amplifies higher-energy components (e.g., corresponding to a lesion or tumor, or the like) of the spatial frequency spectrum to improve viability in a low collimated nuclear image (19) using fewer reconstruction iterations.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: July 15, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: Herfried Karl Wieczorek
  • Publication number: 20140103218
    Abstract: An optical device (102) configured for concentrating light towards a target element (104) is provided. The optical device (102) comprises a waveguide element (106) configured for guiding light towards the target element (104), and a wavelength conversion element (108) configured for converting incoming light of a first wavelength into outgoing light of a second wavelength. The wavelength conversion element (108) extends adjacent to the waveguide element (106). An interface (114) between the waveguide element (106) and the wavelength conversion element (108) comprises a surface roughness. The latter may provide for an in creased efficiency and low manufacturing costs of the optical device (102).
    Type: Application
    Filed: June 18, 2012
    Publication date: April 17, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventor: Herfried Karl Wieczorek
  • Publication number: 20140084170
    Abstract: When employing specular reflective material in a scintillator crystal array, light trapping in the crystal due to repetitive internal reflection is mitigated by roughening at least one side (16) of each of a plurality of pre-formed polished scintillator crystals. A specular reflector material (30) is applied (deposited, wrapped around, etc.) to the roughened crystals, which are arranged in an array. Each crystal array is coupled to a silicon photodetector (32) to form a detector array, which can be mounted in a detector for a functional scanner or the like.
    Type: Application
    Filed: April 26, 2012
    Publication date: March 27, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Herfried Karl Wieczorek, Andreas Thon, Steven Cooke
  • Publication number: 20130153776
    Abstract: The present invention relates to a pixellated detector with an enhanced structure to enable easy pixel identification even with high light output at crystal edges. A half-pixel shift between scintillator crystals (50) and detector pixels (12) enables the identification of a crystal (50) from four detector pixels (12) instead of nine pixels in case of optical crosstalk. Glass plates without any mechanical structuring may be used as a common substrate (60) for detectors and scintillators.
    Type: Application
    Filed: August 18, 2011
    Publication date: June 20, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Herfried Karl Wieczorek, Andreas Thon
  • Publication number: 20130129178
    Abstract: A method includes reconstructing projection data corresponding to a scanned object of interest using an iterative reconstruction algorithm in which a number of reconstruction iterations for the iterative reconstruction algorithm is set based on a size of the scanned object of interest. A system (114) includes a reconstruction algorithm bank (210) including at least one iterative reconstruction algorithm (210), a number of reconstruction iteration determiners (208) that determines a number of reconstruction iterations for reconstructing an image of a scanned object of interest based on the at least one iterative reconstruction algorithm for a size of the scanned object of interest, and a reconstructor (112) that reconstructs projection data to generate the image using at least one iterative reconstruction algorithm based on the determined number of reconstruction iterations.
    Type: Application
    Filed: July 18, 2011
    Publication date: May 23, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Herfried Karl Wieczorek
  • Publication number: 20110194747
    Abstract: When reconstructing low-collimation nuclear scan data (18) (e.g., SPECT) into a nuclear image volume (19), a spatial frequency-dependent (SFD) filter function is applied in Fourier space to the reconstructed image (19) to improve image resolution given a predefined number of reconstruction iterations and/or to reduce the number of reconstruction iterations required to achieve a predetermined level of image resolution. Size of an object to be imaged is determined, and the SFD filter function is determined or generated based on signal power spectrum (and/or modulated transfer function) data, object size, and desired image quality (or number of reconstruction iterations). The SFD filter function amplifies higher-energy components (e.g., corresponding to a lesion or tumor, or the like) of the spatial frequency spectrum to improve viability in a low collimated nuclear image (19) using fewer reconstruction iterations.
    Type: Application
    Filed: October 6, 2009
    Publication date: August 11, 2011
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Herfried Karl Wieczorek
  • Patent number: 7608836
    Abstract: An x-ray detector comprises a conversion layer for converting x-radiation into optical radiation. Photosensitive elements notably photodiodes to derive electronic signals from the optical radiation received by the photosensitive elements. The conversion layer contains Caesium-iodide doped with Thallium (CsI:Tl); the Caesium-iodide doped with Thallium is ultrapure and the Tl-doping level is in the range of 0.25-1.00 at %.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: October 27, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Herfried Karl Wieczorek
  • Patent number: 7535009
    Abstract: The invention relates to a device for generating images and/or projections, which device includes a device for the detection of input radiation. The device for the detection of input radiation comprises a sensor with a Pr3+-activated scintillator for converting the input radiation into UV radiation. The Pr3+-activated scintillators have short excitation and decay times.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: May 19, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Thomas Juestel, Walter Mayr, Herfried Karl Wieczorek
  • Publication number: 20080258067
    Abstract: The invention relates to a microelectronic system, particularly for an X-ray detector, comprising a semiconductor layer (1) with an array of pixels (P) which are composed of photosensitive components (3) and associated electronic circuits (4). An insulating passivation layer (5) with recesses (5a) in its surface is disposed between the semiconductor layer (1) and a scintillator (8). A shielding metal (6) for the protection of the electronic circuits (4) from X-radiation may be disposed in the recesses (5a) of the passivation layer (5). Furthermore, the recesses may contain glue for the fixation of the scintillator (8), wherein the passivation layer (5) additionally serves as a spacer between scintillator (8) and semiconductor layer (1).
    Type: Application
    Filed: August 11, 2005
    Publication date: October 23, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Gereon Vogtmeier, Roger Steadman Booker, Guenter Zeitler, Klaus Jurgen Engel, Herfried Karl Wieczorek
  • Patent number: 7381956
    Abstract: The invention relates to a detector element (1) for gamma radiation, which is particularly suitable for use in a PEF apparatus. The detector element (1) consists of two or more different conversion units (11, 12), which react to the absorption of a gamma quantum (y) with light emissions (?1, ?2) of different spectral composition. A photodetector arrangement (30) may therefore discriminate between the sites of origin of the light emissions by means of their spectral characteristics.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: June 3, 2008
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Michael Overdick, Augusto Nascetti, Herfried Karl Wieczorek
  • Patent number: 7260180
    Abstract: An x-ray examination apparatus comprises an x-ray source and an x-ray detector. The x-ray detector includes a photoconductor to derive electric charges from incident x-radiation and read-out elements which derive electrical pixel-signals from the electric charges from the photoconductor. A central group of the read-out elements is located in a central region of the x-ray detector and a peripheral group of the read-out elements is located in a peripheral region which surrounds the central region. The x-ray examination apparatus being provided with a selection system to select the central group of read-out elements so as to supply pixel-signals from the central group of read-elements to the output circuit. The selection system may include an encompassing electrode to drain electric charges from the peripheral group. Or the selection system shields the peripheral group from x-rays.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: August 21, 2007
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventor: Herfried Karl Wieczorek
  • Patent number: 7211801
    Abstract: A radiation detector comprises a plurality of detector units and x-ray absorption members placed between the respective detector units. An individual detector unit includes a sensor element and read-out circuitry. The x-ray absorption members have a wider portion and a narrower portion and the read-out circuitry is accommodated at the narrower portion of the x-ray absorption member. Hence, the read-out circuitry is shielded from incident x-rays by the wider portion.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: May 1, 2007
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventor: Herfried Karl Wieczorek
  • Patent number: 6989539
    Abstract: The invention relates to a radiation detector for converting electromagnetic radiation (15) into electric charge carriers. The invention also relates to an X-ray examination apparatus provided with such a radiation detector, and to a method of manufacturing a radiation detector. In order to achieve a small building height of the radiation detector while nevertheless satisfying the same requirements as regards the resetting of the converter arrangement (16, 18) by means of an illumination device (6), it is proposed to provide a supporting layer (8) underneath a glass plate (2a) with a photosensor arrangement (2b), which supporting layer on the one hand provides uniform distribution of the light incident from below and on the other hand imparts the necessary stability to the radiation detector.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: January 24, 2006
    Assignee: Koninklije Philips Electronics N.V.
    Inventors: Hans-Aloys Wischmann, Herfried Karl Wieczorek, Falko Busse, Ralf Schmidt