Patents by Inventor Takashi Ashihara

Takashi Ashihara 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: 11464441
    Abstract: A myocardial excitation complementation/visualization apparatus includes an acquiring section that acquires intracardiac electrocardiograms of a subject, the intracardiac electrocardiograms being recorded by a recording unit having a plurality of electrodes, a processing section that performs a computation for completing and visualizing a state of excitation in a myocardium of the subject based on the intracardiac electrocardiograms, and a displaying section that displays the state of excitation in the myocardium of the subject based on an output of the processing section. The processing section includes a first generating section, a correcting section, a second generating section, and a third generating section. The displaying section displays a change of the state of excitation in the myocardium of the subject based on the visualized data.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: October 11, 2022
    Assignees: SHIGA UNIVERSITY OF MEDICAL SCIENCE, NIHON KOHDEN CORPORATION, NATIONAL CEREBRAL AND CARDIOVASCULAR CENTER
    Inventors: Takashi Ashihara, Koji Takizawa, Tatsuo Nishihara, Nobuhiro Suzuki, Yuuho Iwanaga, Akio Ota, Takeshi Tsuchiya, Kazuo Nakazawa, Shin Inada
  • Publication number: 20220296153
    Abstract: A display control device includes processing circuitry configured to: obtain an intracardiac electrocardiogram of a subject; generate visualization data representing an excitation state of a myocardium based on the intracardiac electrocardiogram; determine a type of excitation dynamics of the myocardium based on the visualization data; and display, on a stereoscopic image of a heart of the subject, a site from which the intracardiac electrocardiogram is obtained with a color in accordance with a ratio of the determined type of the excitation dynamics.
    Type: Application
    Filed: March 10, 2022
    Publication date: September 22, 2022
    Applicants: NIHON KOHDEN CORPORATION, NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY, NATIONAL UNIVERSITY CORPORATION SHIGA UNIVERSITY OF MEDICAL SCIENCE
    Inventors: Kunihiko KIUCHI, Takashi ASHIHARA, Kaori UCHIYAMA, Akio OTA, Naoki KOURA, Koji TAKIZAWA
  • Publication number: 20220087590
    Abstract: A recording device includes: an acquisition unit (102) configured to acquire vital signs through a multi-electrode catheter (X) having a plurality of electrodes; a recording unit (104) configured to record a bipolar potential of a main channel which is defined by combining the plurality of electrodes, using the vital signs; an addition unit (32) configured to add a mark to each waveform plotted based on a potential of the bipolar potential, at a predetermined position on a time axis; and an adjusting unit (33) configured to adjust a position of the mark added to each waveform. The adjusting unit (33) is configured to adjust the position of the mark added to the bipolar potential of the main channel, based on bipolar potentials of reference channels including electrodes included in the main channel.
    Type: Application
    Filed: January 14, 2020
    Publication date: March 24, 2022
    Applicants: NATIONAL UNIVERSITY CORPORATION SHIGA UNIVERSITY OF MEDICAL SCIENCE, NIHON KOHDEN CORPORATION
    Inventors: Takashi ASHIHARA, Koji TAKIZAWA, Takeshi TSUCHIYA
  • Patent number: 10898098
    Abstract: A myocardial excitation determining apparatus which can support the determination of excitation dynamics of the myocardium during atrial fibrillation is provided. A myocardial excitation determining apparatus has: an acquiring section 2 which acquires an intracardiac electrocardiogram of a subject; a processing section 3 which computes to produce visualized data indicating a state of excitation in the myocardium, based on the intracardiac electrocardiogram; and a determining section 4 which determines the type of excitation dynamics of the myocardium based on the visualized data.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: January 26, 2021
    Assignees: SHIGA UNIVERSITY OF MEDICAL SCIENCE, NIHON KOHDEN CORPORATION, Takeshi TSUCHIYA, NATIONAL CEREBRAL AND CARDIOVASCULAR CENTER
    Inventors: Takashi Ashihara, Koji Takizawa, Tatsuo Nishihara, Nobuhiro Suzuki, Yuuho Iwanaga, Akio Ota, Takeshi Tsuchiya, Kazuo Nakazawa, Shin Inada
  • Publication number: 20200221964
    Abstract: A myocardial excitation complementation/visualization apparatus includes an acquiring section that acquires intracardiac electrocardiograms of a subject, the intracardiac electrocardiograms being recorded by a recording unit having a plurality of electrodes, a processing section that performs a computation for completing and visualizing a state of excitation in a myocardium of the subject based on the intracardiac electrocardiograms, and a displaying section that displays the state of excitation in the myocardium of the subject based on an output of the processing section. The processing section includes a first generating section, a correcting section, a second generating section, and a third generating section. The displaying section displays a change of the state of excitation in the myocardium of the subject based on the visualized data.
    Type: Application
    Filed: March 25, 2020
    Publication date: July 16, 2020
    Applicants: SHIGA UNIVERSITY OF MEDICAL SCIENCE, NIHON KOHDEN CORPORATION, Takeshi TSUCHIYA, NATIONAL CERERAL AND CARDIOVASCULAR CENTER
    Inventors: Takashi ASHIHARA, Koji Takizawa, Tatsuo Nishihara, Nobuhiro Suzuki, Yuuho Iwanaga, Akio Ota, Takeshi Tsuchiya, Kazuo Nakazawa, Shin Inada
  • Patent number: 10624555
    Abstract: A myocardial excitation complementation/visualization apparatus includes an acquiring section that acquires intracardiac electrocardiograms of a subject, the intracardiac electrocardiograms being recorded by a recording unit having a plurality of electrodes, a processing section that performs a computation for completing and visualizing a state of excitation in a myocardium of the subject based on the intracardiac electrocardiograms, and a displaying section that displays the state of excitation in the myocardium of the subject based on an output of the processing section. The processing section includes a first generating section, a correcting section, a second generating section, and a third generating section. The displaying section displays a change of the state of excitation in the myocardium of the subject based on the visualized data.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: April 21, 2020
    Assignees: SHIGA UNIVERSITY OF MEDICAL SCIENCE, NIHON KOHDEN CORPORATION, NATIONAL CEREBRAL AND CARDIOVASCULAR CENTER
    Inventors: Takashi Ashihara, Koji Takizawa, Tatsuo Nishihara, Nobuhiro Suzuki, Yuuho Iwanaga, Akio Ota, Takeshi Tsuchiya, Kazuo Nakazawa, Shin Inada
  • Publication number: 20190076041
    Abstract: A myocardial excitation determining apparatus which can support the determination of excitation dynamics of the myocardium during atrial fibrillation is provided. A myocardial excitation determining apparatus has: an acquiring section 2 which acquires an intracardiac electrocardiogram of a subject; a processing section 3 which computes to produce visualized data indicating a state of excitation in the myocardium, based on the intracardiac electrocardiogram; and a determining section 4 which determines the type of excitation dynamics of the myocardium based on the visualized data.
    Type: Application
    Filed: March 14, 2017
    Publication date: March 14, 2019
    Applicants: SHIGA UNIVERSITY OF MEDICAL SCIENCE, NIHON KOHDEN CORPORATION, NATIONAL CEREBRAL AND CARDIOVASCULAR CENTER
    Inventors: Takashi ASHIHARA, Koji TAKIZAWA, Tatsuo NISHIHARA, Nobuhiro SUZUKI, Yuuho IWANAGA, Akio OTA, Takeshi TSUCHIYA, Kazuo NAKAZAWA, Shin INADA
  • Publication number: 20180070844
    Abstract: A myocardial excitation complementation/visualization apparatus includes an acquiring section that acquires intracardiac electrocardiograms of a subject, the intracardiac electrocardiograms being recorded by a recording unit having a plurality of electrodes, a processing section that performs a computation for completing and visualizing a state of excitation in a myocardium of the subject based on the intracardiac electrocardiograms, and a displaying section that displays the state of excitation in the myocardium of the subject based on an output of the processing section. The processing section includes a first generating section, a correcting section, a second generating section, and a third generating section. The displaying section displays a change of the state of excitation in the myocardium of the subject based on the visualized data.
    Type: Application
    Filed: March 15, 2016
    Publication date: March 15, 2018
    Applicants: SHIGA UNIVERSITY OF MEDICAL SCIENCE, NIHON KOHDEN CORPORATION, NATIONAL CEREBRAL AND CARDIOVASCULAR CENTER
    Inventors: Takashi ASHIHARA, Koji TAKIZAWA, Tatsuo NISHIHARA, Nobuhiro SUZUKI, Yuuho IWANAGA, Akio OTA, Takeshi TSUCHIYA, Kazuo NAKAZAWA, Shin INADA
  • Patent number: 7567238
    Abstract: A medical treatment support system has operations A to G on a display screen to easily handle respective data on a sheet. Operation A facilitates the browsing of a large amount of data. Operations B and C allow the user to easily copy and move data. Operation D is a scale function to facilitate measurement. Using operation E, the operator can easily divide an area into segments only by drawing a horizontal line. Operation F is used to change a display angle of image data displayed on the screen. Operation G allows the user to browse respective data classified for each sheet label. The new functions of the single-unit input/output pen-tablet device can be intuitively operated by a user not versed in the functions. This consequently mitigates the load of complex input operation which interrupts thinking of the user and which hinders diagnosis mitigated in medical treatment.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: July 28, 2009
    Assignee: NEC Corporation
    Inventors: Mamiko Sugimoto, Takeo Igarashi, Kazuo Nakazawa, Takashi Ashihara
  • Publication number: 20080195161
    Abstract: [PROBLEMS] To prevent ventricular fibrillation. [MEANS FOR SOLVING PROBLEMS] A rectangular base material (10) is sewn to the epicardium surface of a left ventricle (38). Four cooling Peltier elements (12) are provided at the center of the base material (10), and temperature-detecting thermistors (18) are provided at part of their peripheries. A plurality of circular, flat potential sensors/energizing electrodes (14) for detecting the surface potential of the heart are arranged in a lattice form on the surface of the base material (10) at almost equal intervals. The potential sensors/energizing electrodes (14) are energizing electrodes for delivering a pulse voltage/current to the heart. When a rapid ventricular rate is detected, these Peltier elements (12) are energized to cool the heart.
    Type: Application
    Filed: April 11, 2006
    Publication date: August 14, 2008
    Inventors: Ichiro Sakuma, Itsuo Kodama, Kaichiro Kamiya, Haruo Honjo, Masatoshi Yamazaki, Takashi Ashihara, Kazuo Nakazawa
  • Patent number: 6886061
    Abstract: Disclosed is an electronic record system which dispenses with complicated operations using a menu and a button and handwriting input operation like paper writing can be achieved. A system is established and is provided with: an input/output unit device capable of inputting/outputting data by the direct writing on a display screen with a pen; and a control/arithmetic device connected to the input/output unit device and reflecting the data inputted on the display screen to the screen. In this system, an electronic record in the form of strip-shaped sheet with an infinite length extending in the longitudinal direction is displayed, data is directly inputted from the display screen as a stroke data, the inputted characters are converted into the character data by the use of a character recognition engine and the converted data is used as data format available in a secondary use such as a data search, and various functions are driven by a predetermined pen operation.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: April 26, 2005
    Assignees: NEC Corporation
    Inventors: Hiroshi Yokota, Takeo Igarashi, Kazuo Nakazawa, Takashi Ashihara, Takenori Yao, Hiroyuki Sakachi
  • Publication number: 20040003142
    Abstract: Disclosed is an electronic record system which dispenses with complicated operations using a menu and a button and handwriting input operation like paper writing can be achieved. A system is established and is provided with: an input/output unit device capable of inputting/outputting data by the direct writing on a display screen with a pen; and a control/arithmetic device connected to the input/output unit device and reflecting the data inputted on the display screen to the screen. In this system, an electronic record in the form of strip-shaped sheet with an infinite length extending in the longitudinal direction is displayed, data is directly inputted from the display screen as a stroke data, the inputted characters are converted into the character data by the use of a character recognition engine and the converted data is used as data format available in a secondary use such as a data search, and various functions are driven by a predetermined pen operation.
    Type: Application
    Filed: November 21, 2002
    Publication date: January 1, 2004
    Applicants: NEC CORPORATION, Kazuo NAKAZAWA, Takeo IGARASHI
    Inventors: Hiroshi Yokota, Takeo Igarashi, Kazuo Nakazawa, Takashi Ashihara, Takenori Yao, Hiroyuki Sakachi
  • Publication number: 20020060702
    Abstract: A medical treatment support system has operations A to G on a display screen to easily handle respective data on a sheet. Operation A facilitates the browsing of a large amount of data. Operations B and C allow the user to easily copy and move data. Operation D is a scale function to facilitate measurement. Using operation E, the operator can easily divide an area into segments only by drawing a horizontal line. Operation F is used to change a display angle of image data displayed on the screen. Operation G allows the user to browse respective data classified for each sheet label. The new functions of the single-unit input/output pen-tablet device can be intuitively operated by a user not versed in the functions. This consequently mitigates the load of complex input operation which interrupts thinking of the user and which hinders diagnosis mitigated in medical treatment.
    Type: Application
    Filed: November 21, 2001
    Publication date: May 23, 2002
    Inventors: Mamiko Sugimoto, Takeo Igarashi, Kazuo Nakazawa, Takashi Ashihara