Patents by Inventor John Douglas Fraser

John Douglas Fraser 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: 10960194
    Abstract: An apparatus for ultrasound irradiation of a body part (208) includes a first ultrasound transducer (216), and a second ultrasound transducer (212) mounted oppositely, and is configured: a) such that at least two ultrasound receiving elements, for determining a relative orientation of the first to the second transducer, are attached to the first transducer; b) for a beam, from the first transducer, causing cavitation, and/or bubble destruction of systemically circulating microbubbles, within the body part; or c) both with the attached elements and for the causing. The apparatus registers, with said first transducer, the second transducer, by using as a reference respectively the features a) and/or b).
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: March 30, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Jeffry Earl Powers, William Tao Shi, John Douglas Fraser, Ralf Seip, Francois Guy Gerard Marie Vignon
  • Publication number: 20200060655
    Abstract: An ultrasonic diagnostic imaging system for shear wave measurement transmits push pulses into tissue for the generation of shear waves. Characteristics of the shear waves such as their velocity of passage through the tissue are measured to assess properties such as tissue stiffness. The measurements are compensated for effects of background motion by sampling echo signals from the tissue at different times and comparing the samples to detect the presence of relative motion between the ultrasound probe and the region of interest where shear waves are detected. Sensed background motion is used to adjust measured shear wave characteristics.
    Type: Application
    Filed: October 29, 2019
    Publication date: February 27, 2020
    Inventors: JOHN DOUGLAS FRASER, HUA XIE
  • Patent number: 10485514
    Abstract: An ultrasonic diagnostic imaging system for shear wave measurement transmits push pulses into tissue for the generation of shear waves. Characteristics of the shear waves such as their velocity of passage through the tissue are measured to assess properties such as tissue stiffness. The measurements are compensated for effects of background motion by sampling echo signals from the tissue at different times and comparing the samples to detect the presence of relative motion between the ultrasound probe and the region of interest where shear waves are detected. Sensed background motion is used to adjust measured shear wave characteristics.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: November 26, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: John Douglas Fraser, Hua Xie
  • Patent number: 10448924
    Abstract: An ultrasonic diagnostic imaging system for shear wave measurement transmits push pulses in the form of a sheet of energy. The sheet of energy produces a shear wavefront which is a plane wave, which does not suffer from the 1/R radial dissipation of push pulse force as does a conventional push pulse generated along a single push pulse vector. The sheet of energy can be planar, curved, or in some other two or three dimensional shape. A curved sheet of energy can produce a shear wave source which focuses into a thin line, which increases the resolution and sensitivity of the measuring techniques used to detect the shear wave effect.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: October 22, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: John Douglas Fraser, Roy Peterson, Jean-Luc Robert, Vijay Shamdasani, Hua Xie
  • Patent number: 10128777
    Abstract: The present invention relates to a pre-collapsed capacitive micro-machined transducer cell (10) comprising a substrate (12) comprising a first electrode (16), a membrane (14) comprising a second electrode (18), wherein the cell has an outer region (22) where the membrane (14) is mounted to the substrate (12) and an inner region (20) inside or surrounded by the outer region (22), wherein the membrane (14) is collapsed to the substrate (12) in a first collapsed annular-shaped region (24) located within the inner region (20).
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: November 13, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Andrew Lee Robinson, John Douglas Fraser
  • Publication number: 20170353129
    Abstract: The present invention relates to a pre-collapsed capacitive micro-machined transducer cell (10) comprising a substrate (12) comprising a first electrode (16), a membrane (14) comprising a second electrode (18), wherein the cell has an outer region (22) where the membrane (14) is mounted to the substrate (12) and an inner region (20) inside or surrounded by the outer region (22), wherein the membrane (14) is collapsed to the substrate (12) in a first collapsed annular-shaped region (24) located within the inner region (20).
    Type: Application
    Filed: August 22, 2017
    Publication date: December 7, 2017
    Inventors: Andrew Lee Robinson, John Douglas Fraser
  • Patent number: 9762148
    Abstract: The present invention relates to a pre-collapsed capacitive micro-machined transducer cell (10) comprising a substrate (12) comprising a first electrode (16), a membrane (14) comprising a second electrode (18), wherein the cell has an outer region (22) where the membrane (14) is mounted to the substrate (12) and an inner region (20) inside or surrounded by the outer region (22), wherein the membrane (14) is collapsed to the substrate (12) in a first collapsed annular-shaped region (24) located within the inner region (20).
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: September 12, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Andrew Lee Robinson, John Douglas Fraser
  • Patent number: 9570842
    Abstract: A magnetic connection system suitable for use with a wireless ultrasound probe which utilizes a plurality of magnets to facilitate coupling between said probe and a diagnostic or clinical device in a manner which minimizes the effects of stray magnetic fields on the device.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: February 14, 2017
    Assignee: Koninklijke Philips N.V.
    Inventors: Timothy F. Nordgren, Tracy C. Brechbiel, John Douglas Fraser
  • Patent number: 9534949
    Abstract: The present invention relates to a pre-collapsed capacitive micro-machined transducer cell (10) comprising a substrate (12), and a membrane (14) disposed above a total membrane area (Atotal), wherein a cavity (20) is formed between the membrane (14) and the substrate (12), the membrane comprising a hole (15) and an edge portion (14a) surrounding the hole (15). The cell (10) further comprises a stress layer (17) on the membrane (14), the stress layer (17) having a predetermined stress value with respect to the membrane (14), the stress layer (17) being adapted to provide a bending moment on the membrane (14) in a direction towards the substrate (12) such that the edge portion (14a) of the membrane (14) is collapsed to the substrate (12). The present invention further relates to a method of manufacturing such pre-collapsed capacitive micro-machined transducer cell (10).
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: January 3, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Peter Dirksen, Ronald Dekker, Vincent Adrianus Henneken, Adriaan Leeuwestein, Bout Marcelis, John Douglas Fraser
  • Publication number: 20160151618
    Abstract: An apparatus for ultrasound irradiation of a body part (208) includes a first ultrasound transducer (216), and a second ultrasound transducer (212) mounted oppositely, and is configured: a) such that at least two ultrasound receiving elements, for determining a relative orientation of the first to the second transducer, are attached to the first transducer; b) for a beam, from the first transducer, causing cavitation, and/or bubble destruction of systemically circulating microbubbles, within the body part; or c) both with the attached elements and for the causing. The apparatus registers, with said first transducer, the second transducer, by using as a reference respectively the features a) and/or b).
    Type: Application
    Filed: June 25, 2014
    Publication date: June 2, 2016
    Inventors: JEFFRY EARL POWERS, WILLIAM TAO SHI, JOHN DOUGLAS FRASER, RALF SEIP, FRANCOIS GUY GERARD MA VIGNON
  • Patent number: 9117438
    Abstract: The present invention relates to a pre-collapsed capacitive micro-machined transducer cell (10) comprising a substrate (12), and a membrane (14) disposed above a total membrane area ((Atotal), wherein a cavity (20) is formed between the membrane (14) and the substrate (12), the membrane (14) comprising a hole (15) and an edge portion (14a) surrounding the hole (15), the edge portion (14a) of the membrane (14) being collapsed to the substrate (12). The cell further comprises a plug (30) arranged in the hole (15) of the membrane (14), the plug (30) being located only in a subarea (Asub) of the total membrane area (Atotal). The present invention further relates to a method of manufacturing such pre-collapsed capacitive micro-machined transducer cell (10).
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: August 25, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Peter Dirksen, Ronald Dekker, Vincent Adrianus Henneken, Adriaan Leeuwestein, Bout Marcelis, John Douglas Fraser
  • Publication number: 20140265721
    Abstract: The present invention relates to a pre-collapsed capacitive micro -machined transducer cell (10) comprising a substrate (12) comprising a first electrode (16), a membrane (14) comprising a second electrode (18), wherein the cell has an outer region (22) where the membrane (14) is mounted to the substrate (12) and an inner region (20) inside or surrounded by the outer region (22), wherein the membrane (14) is collapsed to the substrate (12) in a first collapsed annular-shaped region (24) located within the inner region (20).
    Type: Application
    Filed: November 5, 2012
    Publication date: September 18, 2014
    Inventors: Andrew Lee Robinson, John Douglas Fraser
  • Publication number: 20140251014
    Abstract: The present invention relates to a pre-collapsed capacitive micro-machined transducer cell (10) comprising a substrate (12), and a membrane (14) disposed above a total membrane area (Atotal), wherein a cavity (20) is formed between the membrane (14) and the substrate (12), the membrane comprising a hole (15) and an edge portion (14a) surrounding the hole (15). The cell (10) further comprises a stress layer (17) on the membrane (14), the stress layer (17) having a predetermined stress value with respect to the membrane (14), the stress layer (17) being adapted to provide a bending moment on the membrane (14) in a direction towards the substrate (12) such that the edge portion (14a) of the membrane (14) is collapsed to the substrate (12). The present invention further relates to a method of manufacturing such pre-collapsed capacitive micro-machined transducer cell (10).
    Type: Application
    Filed: October 26, 2012
    Publication date: September 11, 2014
    Inventors: Peter Dirksen, Ronald Dekker, Vincent Adrianus Henneken, Adriaan Leeuwestein, Bout Marcelis, John Douglas Fraser
  • Publication number: 20140247698
    Abstract: The present invention relates to a pre-collapsed capacitive micro-machined transducer cell (10) comprising a substrate (12), and a membrane (14) disposed above a total membrane area ((Atotal), wherein a cavity (20) is formed between the membrane (14) and the substrate (12), the membrane (14) comprising a hole (15) and an edge portion (14a) surrounding the hole (15), the edge portion (14a) of the membrane (14) being collapsed to the substrate (12). The cell further comprises a plug (30) arranged in the hole (15) of the membrane (14), the plug (30) being located only in a subarea (Asub) of the total membrane area (Atotal). The present invention further relates to a method of manufacturing such pre-collapsed capacitive micro-machined transducer cell (10).
    Type: Application
    Filed: October 15, 2012
    Publication date: September 4, 2014
    Inventors: Peter Dirksen, Ronald Dekker, Vincent Adrianus Henneken, Adriaan Leeuwestein, Bout Marcelis, John Douglas Fraser
  • Patent number: 8787116
    Abstract: A capacitive ultrasound transducer capable of operation in collapsed mode either with a reduced bias voltage, or with no bias voltage, is provided. The transducer includes a substrate that is contoured so that a middle region of the flexible membrane is collapsed against the substrate in the absence of a bias voltage. A non-collapsible gap may exists between the substrate and peripheral regions of the flexible membrane. The contour of the substrate may be such as to strain the flexible membrane past the point of collapse, or to mechanically interfere with the flexible membrane. The substrate may include a further membrane disposed beneath the flexible membrane, the further membrane being contoured so that the flexible membrane is collapsed against it. The substrate may a support disposed beneath the further membrane to deflect a corresponding portion of the further membrane upward toward the flexible membrane. The support may be a post.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: July 22, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: John Petruzzello, John Douglas Fraser, Shiwei Zhou, Benoit Dufort, Theodore James Letavic
  • Patent number: 8769753
    Abstract: The appliance includes an appliance body (12) as well as a system for producing microbubbles (20) and a system for producing an ultrasound signal beam (22) in a frequency range which activates at least some of the microbubbles. The appliance includes at least one of the following: (a) an array of ultrasound transducer elements (40) which produce a plurality of ultrasound signal beams; (b) an amplitude modulation assembly (51) for modulating the amplitude of the ultrasound signal; and (c) a frequency modulation system (61) for changing the frequency of the ultrasound signals over a selected range, to impact a range of microbubble sizes.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: July 8, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: John Douglas Fraser
  • Publication number: 20140005548
    Abstract: An ultrasonic diagnostic imaging system for shear wave measurement transmits push pulses in the form of a sheet of energy. The sheet of energy produces a shear wavefront which is a plane wave, which does not suffer from the 1/R radial dissipation of push pulse force as does a conventional push pulse generated along a single push pulse vector. The sheet of energy can be planar, curved, or in some other two or three dimensional shape. A curved sheet of energy can produce a shear wave source which focuses into a thin line, which increases the resolution and sensitivity of the measuring techniques used to detect the shear wave effect.
    Type: Application
    Filed: December 2, 2011
    Publication date: January 2, 2014
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: John Douglas Fraser, Roy Peterson, Jean-Luc Robert, Vijay Shamdasani, Hua XIE
  • Publication number: 20130331705
    Abstract: An array of cMUT cells are formed on individually isolated massive plates on a substrate. The mass of each plate provides an inertial force in opposition to the force and motion of transmission by the cell which reduces the resultant translation of motion in the plate. The reduction in motion results in less coupling of acoustic energy into the substrate and contamination of the signals of adjacent cMUT cells by lateral waves. The unwanted wave coupling into the substrate can be further damped by compliant or sparse periodic mounting of the massive plates on the substrate.
    Type: Application
    Filed: March 13, 2012
    Publication date: December 12, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: John Douglas Fraser
  • Publication number: 20130296698
    Abstract: An ultrasonic diagnostic imaging system for shear wave measurement transmits push pulses into tissue for the generation of shear waves. Characteristics of the shear waves such as their velocity of passage through the tissue are measured to assess properties such as tissue stiffness. The measurements are compensated for effects of background motion by sampling echo signals from the tissue at different times and comparing the samples to detect the presence of relative motion between the ultrasound probe and the region of interest where shear waves are detected. Sensed background motion is used to adjust measured shear wave characteristics.
    Type: Application
    Filed: December 8, 2011
    Publication date: November 7, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: John Douglas Fraser, Hua Xie
  • Patent number: 8203912
    Abstract: A capacitive ultrasound transducer includes a first electrode, a second electrode, and a third electrode, the third electrode including a central region disposed in collapsibly spaced relation with the first electrode, and a peripheral region disposed outward of the central region and disposed in collapsibly spaced relation with the second electrode. The transducer further includes a layer of a high dielectric constant material disposed between the third electrode and the first electrode, and between the third electrode and the second electrode. The transducer may be operable in a collapsed mode wherein the peripheral region of the third electrode oscillates relative to the second electrode, and the central region of the third electrode is fully collapsed with respect to the first electrode such that the dielectric layer is sandwiched therebetween. Piezoelectric actuation, such as d31 and d33 mode piezoelectric actuation, may further be included.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: June 19, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Aarnoud Laurens Roest, Klaus Reimann, Mareike Klee, Jozef Thomas Martinus van Beek, John Douglas Fraser