Patents by Inventor F. Stuart Foster

F. Stuart Foster 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: 20190069879
    Abstract: A dual frequency transducer array includes one or more low frequency transducer arrays and a high frequency transducer array. Unfocused ultrasound such as plane waves are transmitted by the one or more low frequency transducer arrays in a number of different directions into an imaging region of the high frequency transducer array. High frequency echo signals produced by excited contrast agent in the imaging region are received by the high frequency transducer array to produce a contrast agent image. In another embodiment, the high frequency transducer produces unfocused ultrasound to excite the contrast agent in the imaging region and the low frequency transducer(s) receives low frequency echo signals from the excited contrast agent. A tissue image is created from echo signals received by the high or low frequency transducer. Echo data from the tissue image and the contrast agent image are combined to produce a combined tissue/contrast agent image.
    Type: Application
    Filed: August 28, 2018
    Publication date: March 7, 2019
    Inventors: F. Stuart FOSTER, Desmond HIRSON, Nicholas Christopher CHAGGARES, Emmanuel W. CHERIN, Jianhua YIN, Jing YANG, Christine DEMORE
  • Patent number: 10071267
    Abstract: The described embodiments relate to methods, systems and uses for therapeutic ultrasound, and in particular, to methods, systems and uses for therapeutic ultrasound and contact lenses for treating or alleviating eye conditions. The described embodiments relate to methods, systems and uses that involve an ultrasound device configured for treatment of an eye condition and a contact lens protects ocular tissue of the eye and forms a chamber of air.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: September 11, 2018
    Inventors: Matthew Bujak, F. Stuart Foster, Michael Hynes
  • Patent number: 9997696
    Abstract: Methods of manufacturing transducers with triangular cross-sectional shaped pillars are disclosed herein. According to one aspect of the present application, a plurality of first, second and third troughs are formed in a transducer substrate in first, second and third directions, respectively, to form an array of pillars. In one embodiment, the first direction is substantially parallel to a longitudinal axis of the substrate, the second direction is substantially perpendicular to the longitudinal axis of the substrate, and the third direction is oblique to the longitudinal axis of the substrate. The resulting array of pillars can be configured to suppress lateral modes of a high frequency ultrasound transducer.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: June 12, 2018
    Assignee: FUJIFILM SonoSite, Inc.
    Inventors: Jeremy Brown, F. Stuart Foster, Jianhua Yin
  • Publication number: 20180064962
    Abstract: The described embodiments relate to methods, systems and uses for therapeutic ultrasound, and in particular, to methods, systems and uses for therapeutic ultrasound and contact lenses for treating or alleviating eye conditions. The described embodiments relate to methods, systems and uses that involve an ultrasound device configured for treatment of an eye condition and a contact lens protects ocular tissue of the eye and forms a chamber of air.
    Type: Application
    Filed: September 19, 2017
    Publication date: March 8, 2018
    Inventors: Matthew BUJAK, F. Stuart FOSTER, Michael HYNES
  • Patent number: 9789344
    Abstract: The described embodiments relate to methods, systems and uses for therapeutic ultrasound, and in particular, to methods, systems and uses for therapeutic ultrasound and contact lenses for treating or alleviating eye conditions. The described embodiments relate to methods, systems and uses that involve an ultrasound device configured for treatment of an eye condition and a contact lens protects ocular tissue of the eye and forms a chamber of air.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: October 17, 2017
    Assignee: 2442033 ONTARIO INC.
    Inventors: Matthew Bujak, F. Stuart Foster, Michael Hynes
  • Publication number: 20150148711
    Abstract: The described embodiments relate to methods, systems and uses for therapeutic ultrasound, and in particular, to methods, systems and uses for therapeutic ultrasound and contact lenses for treating or alleviating eye conditions. The described embodiments relate to methods, systems and uses that involve an ultrasound device configured for treatment of an eye condition and a contact lens protects ocular tissue of the eye and forms a chamber of air.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 28, 2015
    Inventors: Matthew Bujak, F. Stuart Foster, Michael Hynes
  • Publication number: 20140354113
    Abstract: A transducer with triangular cross-sectional shaped pillars is described for suppressing lateral modes within a composite, and a method for producing the same. According to one aspect of the present application, a plurality of triangular cross-sectional shaped pillars extends outwardly from a substrate and form an array of pillars. The resulting array of pillars is configured to suppress the lateral modes of the transducer at higher operating frequencies, such as, at or above 15 MHz, at or above 20 MHz, or at or above 30 MHz.
    Type: Application
    Filed: March 10, 2014
    Publication date: December 4, 2014
    Applicant: FUJIFILM VISUALSONICS, INC.
    Inventors: Jeremy Brown, F. Stuart Foster, Jianhua Yin
  • Publication number: 20140336512
    Abstract: A system for producing an ultrasound image comprises a scan head having a transducer capable of generating ultrasound energy at a frequency of at least 20 megahertz (MHz), and a processor for receiving ultrasound energy and for generating an ultrasound image at a frame rate of at least 15 frames per second (fps).
    Type: Application
    Filed: July 24, 2014
    Publication date: November 13, 2014
    Inventors: James Mehi, Nicholas Christopher Chaggares, F. Stuart Foster, Robert McConaghy
  • Patent number: 8827907
    Abstract: A system for producing an ultrasound image comprises a scan head having a transducer capable of generating ultrasound energy at a frequency of at least 20 megahertz (MHz), and a processor for receiving ultrasound energy and for generating an ultrasound image at a frame rate of at least 15 frames per second (fps).
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: September 9, 2014
    Assignee: FUJIFILM Sonosite, Inc.
    Inventors: James Mehi, Nicholas Christopher Chaggares, F. Stuart Foster, Robert McConaghy
  • Patent number: 8823246
    Abstract: A transducer with triangular cross-sectional shaped pillars is described for suppressing lateral modes within a composite, and a method for producing the same. According to one aspect of the present application, a plurality of triangular cross-sectional shaped pillars extends outwardly from a substrate and form an array of pillars. The resulting array of pillars is configured to suppress the lateral modes of the transducer at higher operating frequencies, such as, at or above 15 MHz, at or above 20 MHz, or at or above 30 MHz.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: September 2, 2014
    Assignee: FUJIFILM VisualSonics, Inc.
    Inventors: Jeremy Brown, F. Stuart Foster, Jianhua Yin
  • Publication number: 20140221842
    Abstract: A photoacoustic device capable of performing both intravascular photoacoustic (“IVPA”) imaging and intravascular ultrasound imaging is provided. The device includes one or more optical fibers coupled to a transducer assembly that includes an photoacoustic transducer and optionally an ultrasound transducer. The one or more optical fibers and photoacoustic transducer are arranged such that the illumination field generated by the one or more optical fibers is co-aligned with the sensitive region of the photoacoustic transducer. When both are present, the photoacoustic transducer and ultrasound transducer are arranged such that ultrasound generated by the ultrasound transducer avoids interfering with the sensitive region of the photoacoustic transducer. Frequency domain imaging may be achieved using an intensity-modulated continuous wave (“CW”) laser coupled to the one or more optical fibers.
    Type: Application
    Filed: January 31, 2014
    Publication date: August 7, 2014
    Inventors: Robin F. Castelino, F. Stuart Foster
  • Patent number: 8708909
    Abstract: Provided herein are compositions comprising a microbubble contrast agent, wherein at least 20% by volume of the microbubbles in the contrast agent has a size of less than 1 micron, wherein the contrast agent produces non-linear scattering when contacted by ultrasound at a frequency above 20 MHz. Provided herein are compositions comprising a microbubble contrast agent, wherein at least 10% by volume of the microbubbles in the contrast agent has a size of less than 500 nanometers, wherein the contrast agent produces non-linear scattering when contacted by ultrasound at a frequency above 20 MHz. Provided herein are compositions comprising a microbubble contrast agent, wherein at least 5% by volume of the microbubbles in the contrast agent has a size of less than 200 nanometers, wherein the contrast agent produces non-linear scattering when contacted by ultrasound at a frequency above 20 MHz. The disclosed contrast agents can be targeted contrast agents.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: April 29, 2014
    Assignee: FUJIFILM VisualSonics, Inc.
    Inventors: David E. Goertz, F. Stuart Foster
  • Publication number: 20140073929
    Abstract: A system for producing an ultrasound image comprises a scan head having a transducer capable of generating ultrasound energy at a frequency of at least 20 megahertz (MHz), and a processor for receiving ultrasound energy and for generating an ultrasound image at a frame rate of at least 15 frames per second (fps).
    Type: Application
    Filed: November 15, 2013
    Publication date: March 13, 2014
    Applicant: FUJIFILM VISUALSONICS, INC.
    Inventors: James Mehi, Nicholas Christopher Chaggares, F. Stuart Foster, Robert McConaghy
  • Publication number: 20130193805
    Abstract: A transducer with triangular cross-sectional shaped pillars is described for suppressing lateral modes within a composite, and a method for producing the same. According to one aspect of the present application, a plurality of triangular cross-sectional shaped pillars extends outwardly from a substrate and form an array of pillars. The resulting array of pillars is configured to suppress the lateral modes of the transducer at higher operating frequencies, such as, at or above 15 MHz, at or above 20 MHz, or at or above 30 MHz.
    Type: Application
    Filed: November 13, 2012
    Publication date: August 1, 2013
    Inventors: Jeremy Brown, F. Stuart Foster, Jianhua Yin
  • Patent number: 8310133
    Abstract: A transducer with triangular cross-sectional shaped pillars is described for suppressing lateral modes within a composite, and a method for producing the same. According to one aspect of the present application, a plurality of triangular cross-sectional shaped pillars extends outwardly from a substrate and form an array of pillars. The resulting array of pillars is configured to suppress the lateral modes of the transducer at higher operating frequencies, such as, at or above 15 MHz, at or above 20 MHz, or at or above 30 MHz.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: November 13, 2012
    Assignee: VisualSonics Inc.
    Inventors: Jeremy Brown, F. Stuart Foster, Jianhua Yin
  • Publication number: 20110273059
    Abstract: A transducer with triangular cross-sectional shaped pillars is described for suppressing lateral modes within a composite, and a method for producing the same. According to one aspect of the present application, a plurality of triangular cross-sectional shaped pillars extends outwardly from a substrate and form an array of pillars. The resulting array of pillars is configured to suppress the lateral modes of the transducer at higher operating frequencies, such as, at or above 15 MHz, at or above 20 MHz, or at or above 30 MHz.
    Type: Application
    Filed: December 8, 2010
    Publication date: November 10, 2011
    Inventors: Jeremy Brown, F. Stuart Foster, Jianhua Yin
  • Patent number: 7901358
    Abstract: A system for acquiring an ultrasound signal comprises a signal processing unit adapted for acquiring a received ultrasound signal from an ultrasound transducer having a plurality of elements. The system is adapted to receive ultrasound signals having a frequency of at least 20 megahertz (MHz) with a transducer having a field of view of at least 5.0 millimeters (mm) at a frame rate of at least 20 frames per second (fps). The signal processing can further produce an ultrasound image from the acquired ultrasound signal. The transducer can be a linear array transducer, a phased array transducer, a two-dimensional (2-D) array transducer, or a curved array transducer.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: March 8, 2011
    Assignees: VisualSonics Inc., Sunnybrook Health Science Centre
    Inventors: James Mehi, Ronald E. Daigle, Laurence C. Brasfield, Brian Starkoski, Jerrold Wen, Kai Wen Liu, Lauren S. Pflugrath, F. Stuart Foster, Desmond Hirson
  • Patent number: 7830069
    Abstract: An ultrasonic transducer comprises a stack having a first face, an opposed second face and a longitudinal axis extending therebetween. The stack comprises a plurality of layers, each layer having a top surface and an opposed bottom surface, wherein the plurality of layers of the stack comprises a piezoelectric layer and a dielectric layer. The dielectric layer is connected to the piezoelectric layer and defines an opening extending a second predetermined length in a direction substantially parallel to the axis of the stack. A plurality of first kerf slots are defined therein the stack, each first kerf slot extending a predetermined depth therein the stack and a first predetermined length in a direction substantially parallel to the axis.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: November 9, 2010
    Assignee: Sunnybrook Health Sciences Centre
    Inventors: Marc Lukacs, F. Stuart Foster
  • Patent number: 7674228
    Abstract: A method for producing an ECG-triggered retrospective color-flow ultrasound image comprises generating ultrasound, transmitting the ultrasound into a subject at a first location, wherein a first reference point of an ECG signal taken from the subject triggers the ultrasound transmission, receiving ultrasound reflected from the subject at the first location, transmitting the ultrasound into the subject at a second location, wherein a second reference point of an ECG signal taken from the subject triggers the ultrasound transmission receiving ultrasound reflected from the subject at the second location, processing the received ultrasound to form ultrasound color traces, and reconstructing the ultrasound color traces to form the ultrasound image.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: March 9, 2010
    Assignee: Sunnybrook and Women's College Health Sciences Centre
    Inventors: Ross Williams, Andrew Needles, Emmanuel Cherin, F. Stuart Foster
  • Patent number: RE46185
    Abstract: A system for acquiring an ultrasound signal comprises a signal processing unit adapted for acquiring a received ultrasound signal from an ultrasound transducer having a plurality of elements. The system is adapted to receive ultrasound signals having a frequency of at least 20 megahertz (MHz) with a transducer having a field of view of at least 5.0 millimeters (mm) at a frame rate of at least 20 frames per second (fps). The signal processing can further produce an ultrasound image from the acquired ultrasound signal. The transducer can be a linear array transducer, a phased array transducer, a two-dimensional (2-D) array transducer, or a curved array transducer.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: October 25, 2016
    Assignee: FUJIFILM SonoSite, Inc.
    Inventors: James Mehi, Ronald E. Daigle, Laurence C. Brasfield, Brian Starkoski, Jerrold Wen, Kai Wen Liu, Lauren S. Pflugrath, F. Stuart Foster, Desmond Hirson