Patents by Inventor Atsushi Osawa

Atsushi Osawa 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: 11103136
    Abstract: In a photoacoustic measurement probe including an acoustic wave detector and an amplifier for amplifying a detection signal of a photoacoustic wave and a probe unit and a photoacoustic measurement apparatus having such a probe, heat is efficiently dissipated from the probe. In a probe having an acoustic wave detector and an amplifier, there are provided a first heat conductive member that is in contact with a part of a side plate of a housing and the amplifier to transfer heat generated by the amplifier to the side plate and a second heat conductive member that is in contact with a part different from the part of the side plate and the acoustic wave detector to transfer heat generated by the acoustic wave detector to the side plate.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: August 31, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Atsushi Hashimoto, Kaku Irisawa, Atsushi Osawa
  • Patent number: 11083376
    Abstract: A photoacoustic measurement device reducing artifacts caused by photoacoustic waves generated at a surface portion of a subject on which measurement light is incident, and a signal processing method thereof are obtained. A photoacoustic measurement device includes region discrimination unit that discriminates an artifact generation region and an artifact non-generation region in a photoacoustic image on the basis of a positional relationship between a light emitting portion and an acoustic wave detection portion, and filter unit that performs a first filtering process on a first photoacoustic wave detection signal corresponding to a photoacoustic image of the artifact non-generation region and performs a second filtering process on a second photoacoustic wave detection signal corresponding to a photoacoustic image of the artifact generation region.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: August 10, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Atsushi Hashimoto, Kaku Irisawa, Atsushi Osawa, Tomoki Inoue
  • Patent number: 11072707
    Abstract: Provided are a resin material for an acoustic wave probe which contains a polymer formed of at least one of a structural unit (a) having a specific polysiloxane bond or a structural unit (b) having a specific partial structure, in which the structural unit (b) having the specific partial structure is an acryloyloxy structural unit (b1), an acrylamide structural unit (b2), or a styrene structural unit (b3); an acoustic lens; an acoustic wave probe; an acoustic wave measurement apparatus; an ultrasound diagnostic apparatus; a photoacoustic wave measurement apparatus; and an ultrasound endoscope.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: July 27, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Yuzo Nagata, Yoshihiro Nakai, Toshihide Yoshitani, Shigeki Uehira, Atsushi Osawa
  • Patent number: 11071461
    Abstract: An acoustic wave detector detects photoacoustic waves generated by absorbing measurement light emitted toward a subject, and reflected acoustic waves with respect to acoustic waves transmitted toward the subject. A preamplifier amplifies a detection signal output by the acoustic wave detector. A bypass unit is intended to output the detection signal without passing through the preamplifier. Controller causes the preamplifier to enter an operating state and selects a first path along which the detection signal is amplified by the preamplifier and then is input to the reception circuit as a signal path in a case where the photoacoustic waves are detected. The controller stops an amplification operation in the preamplifier and selects a second path along which the detection signal is input to the reception circuit via a bypass unit as the signal path in a case where reflected acoustic waves are detected.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: July 27, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Atsushi Hashimoto, Atsushi Osawa, Kaku Irisawa, Keiji Tsubota
  • Patent number: 10729405
    Abstract: Provided is a composition for an acoustic wave probe including a polysiloxane mixture containing polysiloxane and silica particles of which an average primary particle diameter exceeds 16 nm and less than 100 nm and which are subjected to surface treatment, and organic peroxide, and a silicone resin for an acoustic wave probe, the acoustic wave probe, an ultrasound probe, an acoustic wave measurement apparatus, an ultrasound diagnostic apparatus, a photoacoustic wave measurement apparatus, and an ultrasound endoscope using the composition for an acoustic wave probe.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: August 4, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Yoshihiro Nakai, Atsushi Osawa
  • Patent number: 10716540
    Abstract: Provided are a resin composition for an acoustic wave probe including, a polymer which has a structural unit having a siloxane bond and a structural unit having a urea bond, an acoustic lens using the same, the acoustic wave probe, acoustic wave measurement apparatus, ultrasound diagnostic apparatus, photoacoustic wave measurement apparatus, and ultrasound endoscope.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: July 21, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Yuzo Nagata, Yoshihiro Nakai, Shigeki Uehira, Atsushi Osawa
  • Patent number: 10660611
    Abstract: Provided is a composition for an acoustic wave probe including a polysiloxane mixture containing polysiloxane having a vinyl group, polysiloxane having two or more Si—H groups in a molecular chain, and silica particles of which an average primary particle diameter exceeds 16 nm and less than 100 nm and which are subjected to surface treatment, a silicone resin for an acoustic wave probe, the acoustic wave probe, an acoustic wave measurement apparatus, an ultrasound diagnostic apparatus, an ultrasound probe, a photoacoustic wave measurement apparatus, and an ultrasound endoscope.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: May 26, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Yoshihiro Nakai, Atsushi Osawa
  • Publication number: 20190231310
    Abstract: Provided are an ultrasound probe including high-sensitive piezoelectric elements and a method of manufacturing an ultrasound probe. The ultrasound probe includes a plurality of piezoelectric elements on a backing material arranged in an array along an arrangement direction. Each of the plurality of piezoelectric elements includes a laminate in which a first conductive part, a piezoelectric body part, and a second conductive part are laminated on a surface of the backing material in order. A plurality of acoustic matching part respectively arranged on the second conductive parts of the plurality of piezoelectric elements is provided. A plurality of third conductive parts acquired by respectively joining a part of the plurality of acoustic matching parts in an elevation direction to the second conductive parts of the plurality of piezoelectric elements is provided. A fourth conductive part that electrically connects the plurality of third conductive parts to each other is provided.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Applicant: FUJIFILM Corporation
    Inventor: Atsushi OSAWA
  • Publication number: 20190218394
    Abstract: Provided are a resin material for an acoustic wave probe which contains a polymer formed of at least one of a structural unit (a) having a specific polysiloxane bond or a structural unit (b) having a specific partial structure, in which the structural unit (b) having the specific partial structure is an acryloyloxy structural unit (b1), an acrylamide structural unit (b2), or a styrene structural unit (b3); an acoustic lens; an acoustic wave probe; an acoustic wave measurement apparatus; an ultrasound diagnostic apparatus; a photoacoustic wave measurement apparatus; and an ultrasound endoscope.
    Type: Application
    Filed: March 26, 2019
    Publication date: July 18, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Yuzo NAGATA, Yoshihiro Nakai, Toshihide Yoshitani, Shigeki Uehira, Atsushi Osawa
  • Patent number: 10245006
    Abstract: A composition for an acoustic-wave probe, containing a polysiloxane mixture, in which the polysiloxane mixture contains: a polysiloxane having a vinyl group; a polysiloxane having at least two Si—H groups in the molecular chain thereof; and silica particles having an average primary particle size of less than 12 nm.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: April 2, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Yoshihiro Nakai, Atsushi Osawa
  • Patent number: 10231700
    Abstract: An ultrasound probe includes a plurality of piezoelectric elements arranged in an array, a plurality of drawn-out signal lines drawn out from the plurality of piezoelectric elements, and a print board on which a plurality of connection conductors are formed for connecting between a plurality of communication cables connected to an ultrasound diagnostic apparatus body and the plurality of drawn-out signal lines, respectively, connection-conductor insulation layers being formed on the printed board so as to cover respective outer peripheries of the plurality of connection conductors, and a connection-conductor ground conductive layer being formed on the printed board so as to cover individual outer peripheries of the connection-conductor insulation layers, whereby the plurality of connection conductors are shielded from one another.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: March 19, 2019
    Assignee: FUJIFULM Corporation
    Inventor: Atsushi Osawa
  • Publication number: 20190023831
    Abstract: Provided are a resin composition for an acoustic wave probe including, a polymer which has a structural unit having a siloxane bond and a structural unit having a urea bond, an acoustic lens using the same, the acoustic wave probe, acoustic wave measurement apparatus, ultrasound diagnostic apparatus, photoacoustic wave measurement apparatus, and ultrasound endoscope.
    Type: Application
    Filed: September 27, 2018
    Publication date: January 24, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Yuzo NAGATA, Yoshihiro NAKAI, Shigeki UEHIRA, Atsushi OSAWA
  • Publication number: 20180360416
    Abstract: Provided is a composition for an acoustic wave probe including a polysiloxane mixture containing polysiloxane and silica particles of which an average primary particle diameter exceeds 16 nm and less than 100 nm and which are subjected to surface treatment, and organic peroxide, and a silicone resin for an acoustic wave probe, the acoustic wave probe, an ultrasound probe, an acoustic wave measurement apparatus, an ultrasound diagnostic apparatus, a photoacoustic wave measurement apparatus, and an ultrasound endoscope using the composition for an acoustic wave probe.
    Type: Application
    Filed: August 14, 2018
    Publication date: December 20, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Yoshihiro NAKAI, Atsushi OSAWA
  • Publication number: 20180344287
    Abstract: Provided is a composition for an acoustic wave probe including a polysiloxane mixture containing polysiloxane having a vinyl group, polysiloxane having two or more Si—H groups in a molecular chain, and silica particles of which an average primary particle diameter exceeds 16 nm and less than 100 nm and which are subjected to surface treatment, a silicone resin for an acoustic wave probe, the acoustic wave probe, an acoustic wave measurement apparatus, an ultrasound diagnostic apparatus, an ultrasound probe, a photoacoustic wave measurement apparatus, and an ultrasound endoscope.
    Type: Application
    Filed: July 26, 2018
    Publication date: December 6, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Yoshihiro NAKAI, Atsushi OSAWA
  • Publication number: 20180199820
    Abstract: In a photoacoustic measurement probe including an acoustic wave detector and an amplifier for amplifying a detection signal of a photoacoustic wave and a probe unit and a photoacoustic measurement apparatus having such a probe, heat is efficiently dissipated from the probe. In a probe having an acoustic wave detector and an amplifier, there are provided a first heat conductive member that is in contact with a part of a side plate of a housing and the amplifier to transfer heat generated by the amplifier to the side plate and a second heat conductive member that is in contact with a part different from the part of the side plate and the acoustic wave detector to transfer heat generated by the acoustic wave detector to the side plate.
    Type: Application
    Filed: March 13, 2018
    Publication date: July 19, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Atsushi HASHIMOTO, Kaku IRISAWA, Atsushi OSAWA
  • Publication number: 20180199821
    Abstract: An acoustic wave detector detects photoacoustic waves generated by absorbing measurement light emitted toward a subject, and reflected acoustic waves with respect to acoustic waves transmitted toward the subject. A preamplifier amplifies a detection signal output by the acoustic wave detector. A bypass unit is intended to output the detection signal without passing through the preamplifier. Controller causes the preamplifier to enter an operating state and selects a first path along which the detection signal is amplified by the preamplifier and then is input to the reception circuit as a signal path in a case where the photoacoustic waves are detected. The controller stops an amplification operation in the preamplifier and selects a second path along which the detection signal is input to the reception circuit via a bypass uni as the signal path in a case where reflected acoustic waves are detected.
    Type: Application
    Filed: March 14, 2018
    Publication date: July 19, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Atsushi HASHIMOTO, Atsushi OSAWA, Kaku IRISAWA, Keiji TSUBOTA
  • Publication number: 20180177407
    Abstract: A photoacoustic measurement device reducing artifacts caused by photoacoustic waves generated at a surface portion of a subject on which measurement light is incident, and a signal processing method thereof are obtained. A photoacoustic measurement device includes region discrimination unit that discriminates an artifact generation region and an artifact non-generation region in a photoacoustic image on the basis of a positional relationship between a light emitting portion and an acoustic wave detection portion, and filter unit that performs a first filtering process on a first photoacoustic wave detection signal corresponding to a photoacoustic image of the artifact non-generation region and performs a second filtering process on a second photoacoustic wave detection signal corresponding to a photoacoustic image of the artifact generation region.
    Type: Application
    Filed: February 21, 2018
    Publication date: June 28, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Atsushi HASHIMOTO, Kaku IRISAWA, Atsushi OSAWA, Tomoki INOUE
  • Publication number: 20180104384
    Abstract: Provided is a composition for an acoustic wave probe including a polysiloxane mixture containing at least polysiloxane having a vinyl group and a phenyl group, polysiloxane having two or more Si—H groups in a molecular chain, and zinc oxide, a silicone resin for an acoustic wave probe, the acoustic wave probe, an acoustic wave measurement apparatus, an ultrasound diagnostic apparatus, an ultrasound probe, a photoacoustic wave measurement apparatus, and an ultrasound endoscope.
    Type: Application
    Filed: December 5, 2017
    Publication date: April 19, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Yoshihiro NAKAI, Takayasu NAGAI, Atsushi OSAWA
  • Patent number: 9799818
    Abstract: There is provided an ultrasound probe capable of efficiently discharging heat generated in a plurality of piezoelectric elements to the outside. A heat collecting portion that includes at least one heat conducting path and is formed of a material having a higher thermal conductivity than a backing member collects heat from a plurality of piezoelectric elements, and a heat exhausting portion connected to the heat collecting portion discharges the heat collected in the heat collecting portion to the outside. The heat conducting path extends in a thickness direction within the backing member and has a distal end exposed from the top surface of the backing member facing the bottom surface of each of the plurality of piezoelectric elements.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: October 24, 2017
    Assignee: FUJIFILM Corporation
    Inventor: Atsushi Osawa
  • Publication number: 20170296063
    Abstract: A photoacoustic measurement probe and a probe unit capable of preventing generation of artifacts in a photoacoustic measurement apparatus are obtained. In a photoacoustic measurement probe having a light emitting unit that emits measurement light toward a subject, an acoustic wave detection element that detects an acoustic wave emitted from a portion of the subject that has received the measurement light, and a housing which has a surface facing the subject at the time of use and in which the light emitting unit and the acoustic wave detection element are housed, at least one slit that is opened to the housing surface and that extends from the housing surface toward the inside of the housing is provided between the light emitting unit and the acoustic wave detection element.
    Type: Application
    Filed: July 6, 2017
    Publication date: October 19, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Atsushi OSAWA, Atsushi HASHIMOTO, Kaku IRISAWA