Patents by Inventor Masahiro Akiba

Masahiro Akiba 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: 10980416
    Abstract: A blood flow measurement apparatus of an embodiment includes an image acquisition unit, an image region specification unit, a measurement location setting unit, a scanner, and a blood flow information generation unit. The image acquisition unit acquires an image of a living body. The image region specification unit analyzes the image to specify a plurality of blood vessel regions. The measurement location setting unit sets a plurality of measurement locations that intersects with the plurality of blood vessel regions. The scanner scans a plurality of cross sections of the living body corresponding to the plurality of measurement locations using optical coherence tomography. The blood flow information generation unit generates blood flow information on the living body based on data acquired through the scan.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: April 20, 2021
    Assignees: National University Corporation ASAHIKAWA MEDICAL UNIVERSITY, KABUSHIKI KAISHA TOPCON
    Inventors: Akitoshi Yoshida, Masahiro Akiba
  • Publication number: 20210038075
    Abstract: A blood flow measuring unit of a blood flow measurement apparatus of an embodiment includes an optical system for applying an OCT scan to an eye fundus and obtains blood flow information based on data acquired by the OCT scan. A movement mechanism moves the optical system. A controller applies a first movement control to the movement mechanism to move the optical system in a first direction orthogonal to an optical axis of the optical system by a predetermined distance from the optical axis. A judging unit judges occurrence of vignetting based on a detection result of return light of light incident on the eye through the optical system after the first movement control. The controller applies a second movement control to the movement mechanism to further move the optical system based on a judgement result obtained by the judging unit.
    Type: Application
    Filed: December 26, 2018
    Publication date: February 11, 2021
    Applicant: TOPCON CORPORATION
    Inventors: Jun SAKAI, Shunsuke NAKAMURA, Kana NISHIKAWA, Masahiro AKIBA
  • Patent number: 10905323
    Abstract: A scanner of a blood flow measurement apparatus of an embodiment alternately performs first scan and second scan for first and second cross sections both intersecting an interested blood vessel. An image forming unit forms one or more images of the first cross section including a phase image of the first cross section and an image of the second cross section. A blood vessel region specification unit specifies a first blood vessel region in any of the one or more images of the first cross section and a second blood vessel region in the image of the second cross section. A gradient calculation unit calculates a gradient of the interested blood vessel at the first cross section based on the first and second blood vessel regions. A blood flow information generation unit generates blood flow information based on the phase image and the gradient.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: February 2, 2021
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventor: Masahiro Akiba
  • Patent number: 10765316
    Abstract: An ophthalmic information processing system according to an embodiment includes a receiver and a processor. The receiver receives morphological data of an eye fundus of a subject. In addition, the receiver receives background data of the subject. The processor executes optic nerve head shape classification based on the morphological data and the background data received by the receiver.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: September 8, 2020
    Assignees: TOPCON CORPORATION, TOHOKU UNIVERSITY, RIKEN
    Inventors: Guangzhou An, Masahiro Akiba, Toru Nakazawa, Kazuko Omodaka, Hideo Yokota
  • Publication number: 20200029809
    Abstract: A controller included in a blood flow measurement apparatus controls a scanner to iteratively scan one or more cross sections of an interested blood vessel. An image forming unit forms a phase image that represents chronological change in phase difference in the one or more cross sections based on data acquired through iterative scan. An image processor outputs a predetermined signal based on the chronological change in phase difference represented by the phase image. Upon receiving the predetermined signal, the controller controls the scanner to start scan for acquiring blood flow information on the interested blood vessel.
    Type: Application
    Filed: October 3, 2019
    Publication date: January 30, 2020
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventor: Masahiro AKIBA
  • Patent number: 10478058
    Abstract: An optical coherence tomography (OCT) image composed of a plurality of A-scans of a structure is analyzed by defining, for each A-scan, a set of neighboring A-scans surrounding the A-slices scan. Following an optional de-noising step, the neighboring A-scans are aligned in the imaging direction, then a matrix X is formed from the aligned A-scans, and matrix completion is performed to obtain a reduced speckle noise image.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: November 19, 2019
    Assignees: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, KABUSHIKI KAISHA TOPCON
    Inventors: Jun Cheng, Jiang Liu, Wing Kee Damon Wong, Masahiro Akiba
  • Patent number: 10426335
    Abstract: An ophthalmic image display device having, a display controller that displays a B mode image, a blood vessel enhanced image representing a same cross section as the B mode image, and one or more front images individually formed based on a three dimensional data set acquired by performing optical coherence tomography on a subject's eye in a predetermined layout. Further, the display controller displays a cross section position indicator that indicates a position of a cross section of the B mode image over at least one of the one or more front images. In addition, the display controller synchronously performs changing of a display position of the cross section position indicator and updating of a display of each of the B mode image and the blood vessel enhanced image in accordance with an operation for moving the cross section position indicator performed using an operation unit.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: October 1, 2019
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Masahiro Akiba, Atsushi Kubota
  • Patent number: 10362939
    Abstract: A fundus analysis apparatus includes a storage, an area setting unit, and a morphological information generating unit. The storage is configured to store OCT information acquired by applying optical coherence tomography to the fundus of an eye. The area setting unit is configured to set a front area corresponding to a front surface of the lamina cribrosa and a rear area corresponding to a rear surface of the lamina cribrosa in the OCT information. The morphological information generating unit is configured to generate morphological information indicating the morphology of the lamina cribrosa based on at least the front area and the rear area.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: July 30, 2019
    Assignees: TOHOKU UNIVERSITY, KABUSHIKI KAISHA TOPCON
    Inventors: Toru Nakazawa, Kazuko Omodaka, Akiko Matsumoto, Tsutomu Kikawa, Masahiro Akiba
  • Patent number: 10285585
    Abstract: An ophthalmic surgical apparatus includes an observation optical system, an illumination optical system, an interference optical system, and an image forming unit. The observation optical system is configured to observe an eye through an objective lens. The illumination optical system is configured to illuminate the eye through the objective lens. The interference optical system includes a reference optical path and a signal optical path which leads to the eye through the deflecting member located between the objective lens and the eye, and is configured to detect interference light based on light having passed through the signal optical path and returning from the eye and the reference light having passed through the reference optical path. The image forming unit forms an image of the eye based on a detection result obtained by the interference optical system.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: May 14, 2019
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Michiko Nakanishi, Takefumi Hayashi, Hiroshi Akiyama, Masahiro Akiba, Makoto Fujino
  • Publication number: 20180368679
    Abstract: An ophthalmic information processing system according to an embodiment includes a receiver and a processor. The receiver receives morphological data of an eye fundus of a subject. In addition, the receiver receives background data of the subject. The processor executes optic nerve head shape classification based on the morphological data and the background data received by the receiver.
    Type: Application
    Filed: March 20, 2018
    Publication date: December 27, 2018
    Applicants: TOPCON CORPORATION, TOHOKU UNIVERSITY, RIKEN
    Inventors: Guangzhou AN, Masahiro AKIBA, Toru NAKAZAWA, Kazuko OMODAKA, Hideo YOKOTA
  • Publication number: 20180360308
    Abstract: A storage device of an ophthalmologic image display device of an embodiment stores a three dimensional data set acquired by scanning a subject's eye using OCT. An image processor forms, based on the three dimensional data set, a B-mode image, front images, and composite front image obtained from the front images. A display controller displays the B-mode image, front images and composite front image in a predetermined layout. The display controller displays distinguishment color information for distinguishment between the front images by colors and slice area information that indicates a partial region of the B-mode image corresponding to a slice area of the three dimensional data set represented by each front image in a color according to the distinguishment color information, and displays a composite front image based on the front images, each of which is expressed by a color according to the distinguishment color information.
    Type: Application
    Filed: October 25, 2016
    Publication date: December 20, 2018
    Applicant: TOPCON CORPORATION
    Inventors: Taiki AIMI, Masahiro AKIBA, Atsushi KUBOTA
  • Patent number: 10145669
    Abstract: A method and system are proposed to obtain a reduced speckle noise image of a subject from optical coherence tomography (OCT) image data of the subject. The cross sectional images each comprise a plurality of scan lines obtained by measuring the time delay of light reflected, in a depth direction, from optical interfaces within the subject. The method comprises two aligning steps. First the cross sectional images are aligned, then image patches of the aligned cross sectional images are aligned to form a set of aligned patches. An image matrix is then formed from the aligned patches; and matrix completion is applied to the image matrix to obtain a reduced speckle noise image of the subject.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: December 4, 2018
    Assignees: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, KABUSHIKI KAISHA TOPCON
    Inventors: Jun Cheng, Jiang Liu, Lixin Duan, Yanwu Xu, Wing Kee Damon Wong, Masahiro Akiba
  • Publication number: 20180279874
    Abstract: A blood flow measurement apparatus of an embodiment includes an image acquisition unit, an image region specification unit, a measurement location setting unit, a scanner, and a blood flow information generation unit. The image acquisition unit acquires an image of a living body. The image region specification unit analyzes the image to specify a plurality of blood vessel regions. The measurement location setting unit sets a plurality of measurement locations that intersects with the plurality of blood vessel regions. The scanner scans a plurality of cross sections of the living body corresponding to the plurality of measurement locations using optical coherence tomography. The blood flow information generation unit generates blood flow information on the living body based on data acquired through the scan.
    Type: Application
    Filed: November 2, 2015
    Publication date: October 4, 2018
    Applicants: NATIONAL UNIVERSITY CORPORATION ASAHIKAWA MEDICAL UNIVERSITY, KABUSHIKI KAISHA TOPCON
    Inventors: Akitoshi YOSHIDA, Masahiro AKIBA
  • Patent number: 10058242
    Abstract: An embodiment provides a new technique of ophthalmologic diagnostic imaging. An ophthalmologic imaging apparatus of an embodiment includes: an acquiring part configured to acquire three-dimensional image data of an eye by using optical coherence tomography; a designating part configured for designating partial image data that is a part of the three-dimensional image data corresponding to a specific site of the eye; a deforming part configured to deform the three-dimensional image data such that the partial image data is deformed into a predetermined shape to create new three-dimensional image data; a forming part configured to form cross-sectional image data based on the new three-dimensional image data; and a display controller configured to display an image based on the cross-sectional image data on a display means.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: August 28, 2018
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Fumi Gomi, Masahiro Akiba, Tsutomu Kikawa
  • Patent number: 10036100
    Abstract: An apparatus for producing a silicon single crystal by a Czochralski method with a chamber having a heater therein to heat a raw material and to cool the chamber by a coolant, including: measuring an inlet temperature, outlet temperature, and flow rate in a passage of the coolant to cool the chamber with flowing in the chamber; calculating a removed heat quantity from the chamber based on the measured values of the inlet temperature, outlet temperature, and flow rate; controlling heater power based on the value of the removed heat quantity. This provides an apparatus which can pull a single crystal in a crystal diameter and a crystal pulling rate closer to the target values by controlling the heater power based on a removed heat quantity from the chamber calculated by the measured values of temperatures and a flow rate of the coolant.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: July 31, 2018
    Assignee: SHIN-ETSU HANDOTAI CO., LTD.
    Inventors: Takahiro Yanagimachi, Masahiro Akiba, Junya Tokue, Susumu Sonokawa
  • Publication number: 20180116501
    Abstract: An ophthalmic image display device having, a display controller that displays a B mode image, a blood vessel enhanced image representing a same cross section as the B mode image, and one or more front images individually formed based on a three dimensional data set acquired by performing optical coherence tomography on a subject's eye in a predetermined layout. Further, the display controller displays a cross section position indicator that indicates a position of a cross section of the B mode image over at least one of the one or more front images. In addition, the display controller synchronously performs changing of a display position of the cross section position indicator and updating of a display of each of the B mode image and the blood vessel enhanced image in accordance with an operation for moving the cross section position indicator performed using an operation unit.
    Type: Application
    Filed: January 21, 2016
    Publication date: May 3, 2018
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Masahiro AKIBA, Atsushi KUBOTA
  • Patent number: 9949635
    Abstract: An ophthalmic surgical apparatus includes an observation optical system, an illumination optical system, an interference optical system, and an image forming unit. The observation optical system is configured to observe an eye through an objective lens. The illumination optical system is configured to illuminate the eye through the objective lens. The interference optical system includes a reference optical path and a signal optical path which leads to the eye through the deflecting member located between the objective lens and the eye, and is configured to detect interference light based on light having passed through the signal optical path and returning from the eye and the reference light having passed through the reference optical path. The image forming unit forms an image of the eye based on a detection result obtained by the interference optical system.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: April 24, 2018
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Michiko Nakanishi, Takefumi Hayashi, Hiroshi Akiyama, Masahiro Akiba, Makoto Fujino
  • Patent number: 9936870
    Abstract: In an embodiment, cross sectional image storage stores a cross sectional image group including multiple cross sectional images each of which is associated with time. Phase image storage stores a phase image group including multiple phase images each of which is associated with time. Blood flow information storage stores a blood flow information group including multiple blood flow information each of which is related to blood flow in a blood vessel of the living body and is associated with time. Display synchronously displays a cross sectional image included in the cross sectional image group and a phase image included in the phase image group using time associated with the cross sectional image and the phase image, and displays a blood flow image. The display performs the same change as the change to the change operation to the cross sectional image, the phase image and the blood flow image.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: April 10, 2018
    Assignees: KABUSHIKI KAISHA TOPCON, National University Corporation ASAHIKAWA MEDICAL UNIVERITY
    Inventors: Akitoshi Yoshida, Masahiro Akiba, Yasufumi Fukuma, Hideaki Tokoro, Taiki Aimi, Shunsuke Nakamura
  • Publication number: 20180055352
    Abstract: An ophthalmic surgical apparatus includes an observation optical system, an illumination optical system, an interference optical system, and an image forming unit. The observation optical system is configured to observe an eye through an objective lens. The illumination optical system is configured to illuminate the eye through the objective lens. The interference optical system includes a reference optical path and a signal optical path which leads to the eye through the deflecting member located between the objective lens and the eye, and is configured to detect interference light based on light having passed through the signal optical path and returning from the eye and the reference light having passed through the reference optical path. The image forming unit forms an image of the eye based on a detection result obtained by the interference optical system.
    Type: Application
    Filed: October 24, 2017
    Publication date: March 1, 2018
    Applicant: KABUSHIKI KAISHA TOPCON
    Inventors: Michiko NAKANISHI, Takefumi Hayashi, Hiroshi Akiyama, Masahiro Akiba, Makoto Fujino
  • Publication number: 20180037983
    Abstract: A sputtering device capable of satisfying various requirements is provided. The sputtering device includes a rotation and revolution table, multiple sputtering targets, an RF plasma source, and a load-lock chamber 102. The rotation and revolution table is arranged inside a pressure-reducible container 101 and is rotatable by independent control. The multiple sputtering targets are arranged on a revolution orbit of the rotation and revolution table so as to correspond to multiple workpieces 107 to be set on the rotation and revolution table. The RF plasma source performs plasma treatment. The load-lock chamber 102 is used for setting the multiple workpieces on the rotation and revolution table. The rotation and revolution table is configured by arranging multiple rotation mounts 105 on a revolution table 104, and the rotations of the revolution table 104 and the multiple rotation mounts 105 are independently controllable.
    Type: Application
    Filed: March 7, 2016
    Publication date: February 8, 2018
    Applicant: TOPCON CORPORATION
    Inventors: Masahiro AKIBA, Yoshihiro YAMAGUCHI, Makoto SETA