Patents by Inventor Johan A. Overweg
Johan A. Overweg 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).
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Patent number: 10143376Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.Type: GrantFiled: March 26, 2014Date of Patent: December 4, 2018Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Volkmar Schulz, Torsten Solf, Johan Overweg, Andreas Thon
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Patent number: 9669238Abstract: We provide a radiotherapeutic apparatus comprising a patient support, magnetic coils disposed around the patient support for creating a magnetic field therewithin, a radiation source producing a beam of radiation directed toward the patient support and mounted on a rotatable support thereby to rotate the radiation source around the patient support, a slip ring for conveying electrical power to the radiation source and located around the patient support, including at least one electrical interruption therein. This creates a slip ring in which there is no continuous circumferential path, and one in which the current is therefore forced to take a route via one side or the other.Type: GrantFiled: October 9, 2012Date of Patent: June 6, 2017Assignees: Elekta AB (publ), Koninklijke Philips Electronics N.V.Inventors: Christopher Knox, Duncan Bourne, Johan Overweg, Jan Rietema
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Patent number: 9423479Abstract: A generally cylindrical set of coil windings includes primary coil windings and shield coil windings at a larger radial position than the primary coil windings, and an arcuate or annular central gap that is free of coil windings, has an axial extent of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors is disposed in the central gap of the generally cylindrical set of coil windings.Type: GrantFiled: November 8, 2013Date of Patent: August 23, 2016Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Johan A. Overweg, Volkmar Schulz, Torsten J. Solf, Gordon D. DeMeester, Michael A. Morich
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Publication number: 20140206983Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.Type: ApplicationFiled: March 26, 2014Publication date: July 24, 2014Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Volkmar SCHULZ, Torsten SOLF, Johan OVERWEG, Andreas THON
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Patent number: 8723521Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.Type: GrantFiled: July 25, 2013Date of Patent: May 13, 2014Assignee: Koninklijke Philips N.V.Inventors: Volkmar Schulz, Torsten Solf, Johan Overweg, Andreas Thon
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Publication number: 20140062486Abstract: A generally cylindrical set of coil windings includes primary coil windings and shield coil windings at a larger radial position than the primary coil windings, and an arcuate or annular central gap that is free of coil windings, has an axial extent of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors is disposed in the central gap of the generally cylindrical set of coil windings.Type: ApplicationFiled: November 8, 2013Publication date: March 6, 2014Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Johan A. OVERWEG, Volkmar SCHULZ, Torsten J. SOLF, Gordon D. DeMEESTER, Michael A. MORICH
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Patent number: 8604795Abstract: A generally cylindrical set of coil windings includes primary coil windings and shield coil windings at a larger radial position than the primary coil windings, and an arcuate or annular central gap that is free of coil windings, has an axial extent of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors is disposed in the central gap of the generally cylindrical set of coil windings.Type: GrantFiled: June 6, 2012Date of Patent: December 10, 2013Assignee: Koninklijke Philips N.V.Inventors: Johan A. Overweg, Volkmar Schulz, Torsten Solf, Gordon D. Demeester, Michael A. Morich
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Publication number: 20130310681Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.Type: ApplicationFiled: July 25, 2013Publication date: November 21, 2013Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.Inventors: Volkmar SCHULZ, Torsten SOLF, Johan OVERWEG, Andreas THON
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Patent number: 8519710Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.Type: GrantFiled: April 26, 2012Date of Patent: August 27, 2013Assignee: Koninklijke Philips N.V.Inventors: Volkmar Schulz, Torsten Solf, Johan Overweg, Andreas Thon
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Patent number: 8334697Abstract: A generally cylindrical set of coil windings (10, 30, 80) includes primary coil windings (12, 32, 82) and shield coil windings (14, 34, 84) at a larger radial position than the primary coil windings, and an arcuate or annular central gap (16, 36, 86) that is free of coil windings, has an axial extent (W) of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors (24, 44, 94) disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet (62, 64) is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors (66) is disposed in the central gap of the generally cylindrical set of coil windings.Type: GrantFiled: January 16, 2008Date of Patent: December 18, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Johan A. Overweg, Volkmar Schulz, Torsten Solf, Gordon D. Demeester, Michael A. Morich
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Publication number: 20120241631Abstract: A generally cylindrical set of coil windings includes primary coil windings and shield coil windings at a larger radial position than the primary coil windings, and an arcuate or annular central gap that is free of coil windings, has an axial extent of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors is disposed in the central gap of the generally cylindrical set of coil windings.Type: ApplicationFiled: June 6, 2012Publication date: September 27, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Johan A. OVERWEG, Volkmar SCHULZ, Torsten J. SOLF, Gordon D. DEMEESTER, Michael A. MORICH
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Publication number: 20120206139Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet configured to generate a static magnetic field at least in a MR examination region from which MR data are acquired. Radiation detectors are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region. The radiation detectors include electron multiplier elements having a direction of electron acceleration arranged substantially parallel or anti-parallel with the static magnetic field. In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces disposed on opposite sides of a magnetic resonance examination region, and the radiation detectors include first and second arrays of radiation detectors disposed with the first and second spaced apart magnet pole pieces.Type: ApplicationFiled: April 26, 2012Publication date: August 16, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.Inventors: Volkmar SCHULZ, Torsten SOLF, Johan OVERWEG, Andreas THON
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Patent number: 8188736Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet (10, 110) configured to generate a static magnetic field (B0) at least in a MR examination region (12) from which MR data are acquired. Radiation detectors (40, 41, 140) are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region (70). The radiation 5 detectors include electron multiplier elements (60, 160) having a direction of electron acceleration (ae) arranged substantially parallel or anti-parallel with the static magnetic field (B0). In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces (14, 15) disposed on opposite sides of a magnetic 10 resonance examination region, and the radiation detectors include first and second arrays (40, 41) of radiation detectors disposed with the first and second spaced apart magnet pole pieces.Type: GrantFiled: January 8, 2008Date of Patent: May 29, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Volkmar Schulz, Torsten Solf, Johan Overweg, Andreas Thon
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Publication number: 20100102813Abstract: In a combined system, a magnetic resonance (MR) scanner includes a magnet (10, 110) configured to generate a static magnetic field (B0) at least in a MR examination region (12) from which MR data are acquired. Radiation detectors (40, 41, 140) are configured to detect gamma rays generated by positron-electron annihilation events in a positron emission tomography (PET) examination region (70). The radiation 5 detectors include electron multiplier elements (60, 160) having a direction of electron acceleration (ae) arranged substantially parallel or anti-parallel with the static magnetic field (B0). In some embodiments, the magnet is an open magnet having first and second spaced apart magnet pole pieces (14, 15) disposed on opposite sides of a magnetic 10 resonance examination region, and the radiation detectors include first and second arrays (40, 41) of radiation detectors disposed with the first and second spaced apart magnet pole pieces.Type: ApplicationFiled: January 8, 2008Publication date: April 29, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.Inventors: Volkmar Schulz, Torsten Solf, Johan Overweg, Andreas Thon
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Publication number: 20100033186Abstract: A generally cylindrical set of coil windings (10, 30, 80) includes primary coil windings (12, 32, 82) and shield coil windings (14, 34, 84) at a larger radial position than the primary coil windings, and an arcuate or annular central gap (16, 36, 86) that is free of coil windings, has an axial extent (W) of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors (24, 44, 94) disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet (62, 64) is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors (66) is disposed in the central gap of the generally cylindrical set of coil windings.Type: ApplicationFiled: January 16, 2008Publication date: February 11, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Johan A. Overweg, Volkmar Schulz, Torsten Solf, Gordon D. Demeester, Michael A. Morich
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Publication number: 20090206840Abstract: In a magnetic resonance scanner, a radio frequency transmit coil (30, 30?) includes a plurality of parallel rods rungs (32, 32?, 32?) at least partially surrounding an examination region. The radio frequency transmit coil is configured to transmit radio frequency energy into the examination region at or near a magnetic resonance frequency. A plurality of magnetic resonance receive coils (40) are disposed with the radio frequency transmit coil. For decoupling, each magnetic resonance receive coil is positioned substantially centered on a proximate one rod or rung or proximate plurality of neighboring rods or rungs of the radio frequency transmit coil.Type: ApplicationFiled: June 19, 2007Publication date: August 20, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.Inventors: Johan A. Overweg, Daniel Wirtz
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Publication number: 20090004114Abstract: Systems and methods for monitoring in vivo release of therapeutic and/or diagnostic agents, e.g., drugs, are provided. The disclosed systems and methods use a contrast agent and Overhauser-enhanced nuclear magnetic resonance (NMR) to monitor and/or measure the concentration and distribution of the contrast agent. Provided the contrast agent and the therapeutic/diagnostic agent have similar pharmaco-kinetics, the disclosed system/method may also be used to monitor and/or measure the concentration of such therapeutic/diagnostic agent (e.g., a drug), e.g., in the form of a volume-averaged signal and/or dynamic two-dimensional or three-dimensional images. In exemplary embodiments of the present disclosure, the therapeutic/diagnostic agent and the contrast agent are introduced to the body in an encapsulated form, e.g., within hollow nanoparticles.Type: ApplicationFiled: November 15, 2006Publication date: January 1, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.Inventor: Johan Overweg