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).
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Patent number: 11446006Abstract: 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: GrantFiled: October 29, 2019Date of Patent: September 20, 2022Assignee: KONINKLIJKE PHILIPS N.V.Inventors: John Douglas Fraser, Hua Xie
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Patent number: 10960194Abstract: 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: GrantFiled: June 25, 2014Date of Patent: March 30, 2021Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Jeffry Earl Powers, William Tao Shi, John Douglas Fraser, Ralf Seip, Francois Guy Gerard Marie Vignon
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Publication number: 20200060655Abstract: 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: ApplicationFiled: October 29, 2019Publication date: February 27, 2020Inventors: JOHN DOUGLAS FRASER, HUA XIE
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Patent number: 10485514Abstract: 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: GrantFiled: December 8, 2011Date of Patent: November 26, 2019Assignee: KONINKLIJKE PHILIPS N.V.Inventors: John Douglas Fraser, Hua Xie
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Patent number: 10448924Abstract: 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: GrantFiled: December 2, 2011Date of Patent: October 22, 2019Assignee: KONINKLIJKE PHILIPS N.V.Inventors: John Douglas Fraser, Roy Peterson, Jean-Luc Robert, Vijay Shamdasani, Hua Xie
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Patent number: 10128777Abstract: 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: GrantFiled: August 22, 2017Date of Patent: November 13, 2018Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Andrew Lee Robinson, John Douglas Fraser
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Publication number: 20170353129Abstract: 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: ApplicationFiled: August 22, 2017Publication date: December 7, 2017Inventors: Andrew Lee Robinson, John Douglas Fraser
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Patent number: 9762148Abstract: 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: GrantFiled: November 5, 2012Date of Patent: September 12, 2017Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Andrew Lee Robinson, John Douglas Fraser
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Patent number: 9570842Abstract: 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: GrantFiled: August 3, 2010Date of Patent: February 14, 2017Assignee: Koninklijke Philips N.V.Inventors: Timothy F. Nordgren, Tracy C. Brechbiel, John Douglas Fraser
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Patent number: 9534949Abstract: 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: GrantFiled: October 26, 2012Date of Patent: January 3, 2017Assignee: KONINKLIJKE PHILIPS N.V.Inventors: Peter Dirksen, Ronald Dekker, Vincent Adrianus Henneken, Adriaan Leeuwestein, Bout Marcelis, John Douglas Fraser
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Publication number: 20160151618Abstract: 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: ApplicationFiled: June 25, 2014Publication date: June 2, 2016Inventors: JEFFRY EARL POWERS, WILLIAM TAO SHI, JOHN DOUGLAS FRASER, RALF SEIP, FRANCOIS GUY GERARD MA VIGNON
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Patent number: 9117438Abstract: 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: GrantFiled: October 15, 2012Date of Patent: August 25, 2015Assignee: Koninklijke Philips N.V.Inventors: Peter Dirksen, Ronald Dekker, Vincent Adrianus Henneken, Adriaan Leeuwestein, Bout Marcelis, John Douglas Fraser
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Publication number: 20140265721Abstract: 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: ApplicationFiled: November 5, 2012Publication date: September 18, 2014Inventors: Andrew Lee Robinson, John Douglas Fraser
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Publication number: 20140251014Abstract: 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: ApplicationFiled: October 26, 2012Publication date: September 11, 2014Inventors: Peter Dirksen, Ronald Dekker, Vincent Adrianus Henneken, Adriaan Leeuwestein, Bout Marcelis, John Douglas Fraser
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Publication number: 20140247698Abstract: 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: ApplicationFiled: October 15, 2012Publication date: September 4, 2014Inventors: Peter Dirksen, Ronald Dekker, Vincent Adrianus Henneken, Adriaan Leeuwestein, Bout Marcelis, John Douglas Fraser
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Patent number: 8787116Abstract: 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: GrantFiled: December 12, 2008Date of Patent: July 22, 2014Assignee: Koninklijke Philips N.V.Inventors: John Petruzzello, John Douglas Fraser, Shiwei Zhou, Benoit Dufort, Theodore James Letavic
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Patent number: 8769753Abstract: 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: GrantFiled: December 9, 2009Date of Patent: July 8, 2014Assignee: Koninklijke Philips N.V.Inventor: John Douglas Fraser
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Publication number: 20140005548Abstract: 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: ApplicationFiled: December 2, 2011Publication date: January 2, 2014Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: John Douglas Fraser, Roy Peterson, Jean-Luc Robert, Vijay Shamdasani, Hua XIE
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Publication number: 20130331705Abstract: 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: ApplicationFiled: March 13, 2012Publication date: December 12, 2013Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventor: John Douglas Fraser
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Publication number: 20130296698Abstract: 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: ApplicationFiled: December 8, 2011Publication date: November 7, 2013Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: John Douglas Fraser, Hua Xie