Patents by Inventor Ichiro Sakuma
Ichiro Sakuma 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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Publication number: 20230086533Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain a medical image. The processing circuitry is configured to calculate a first blood flow direction on the basis of a structure of a region of interest rendered in the medical image. The processing circuitry is configured to calculate a second blood flow direction on the basis of a structure in the surroundings of the region of interest. The processing circuitry is configured to identify a condition of the region of interest, on the basis of the first blood flow direction and the second blood flow direction.Type: ApplicationFiled: September 19, 2022Publication date: March 23, 2023Applicants: The University of Tokyo, CANON MEDICAL SYSTEMS CORPORATIONInventors: Gakuto AOYAMA, Ichiro SAKUMA, Minoru ONO, Shu TAKAGI, Asuka HATANO, Haruo YAMAUCHI, Eriko MAEDA (Deceased), Naoki TOMII, Hiroyuki TSUKIHARA
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Patent number: 11547340Abstract: An aspect of the present disclosure calculates a phase variance value indicating a degree of variance of a phase in a surrounding of each position in a biological tissue, based on phase values of excitation wave at respective positions in the biological tissue that acts in response to excitation caused by propagation of the excitation wave in the tissue, and generates an analysis map, based on a time series of at least part of the phase variance values at the respective positions. Since the phase variance value indicates the degree of variance of the phase in the surrounding, a position having a large degree of variance of the phase in the surrounding may be specified as a rotation center of rotating excitation wave.Type: GrantFiled: March 20, 2018Date of Patent: January 10, 2023Assignee: THE UNIVERSITY OF TOKYOInventors: Ichiro Sakuma, Naoki Tomii, Hiroshi Seno, Haruo Honjo, Masatoshi Yamazaki
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Publication number: 20220387674Abstract: In a medical instrument that is inserted into an affected area or tissue to perform treatment, a technique of delivering various drugs to a target site is desired. Provided is a medical instrument that is inserted into an affected area or tissue to perform treatment, wherein a drug-loaded nanostructure is covalently bound to the medical instrument via a photosensitive linker immobilized on the surface of at least a portion of the medical instrument.Type: ApplicationFiled: July 9, 2020Publication date: December 8, 2022Applicant: THE UNIVERSITY OF TOKYOInventors: Yuki AKAGI, Yasutaka ANRAKU, Ichiro SAKUMA, Hayato Laurence MIZUNO
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Publication number: 20220175315Abstract: A method for estimating an arrangement of electrodes obtains detection signals when an initial electrode array having a sufficient number of electrodes for detection of excitation wave arranged and arrayed in a plane is attached to biological tissue. The method uses a plurality of input data based on detection signals obtained in a plurality of second electrode arrays generated by eliminating a predetermined number of electrodes at random from the initial electrode array, and uses an image of excitation wave in a process of obtaining the detection signals by using the initial electrode array, as teacher data, obtaining a learned model by deep learning. The method selects a second electrode array corresponding to an analysis image that is best matched with the image of the teacher data, among a plurality of analysis images obtained by applying the plurality of input data to the learned model, as a selective electrode array.Type: ApplicationFiled: January 24, 2020Publication date: June 9, 2022Applicant: THE UNIVERSITY OF TOKYOInventors: Naoki TOMII, Ichiro SAKUMA, Masatoshi YAMAZAKI, Jiaming JIAO
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Patent number: 11348244Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain feature values related to the shape and a property of the heart. The processing circuitry is configured to estimate, by using the feature values, a state of the heart after a chest is opened. The processing circuitry is configured to estimate, based on a result of the estimation of the state of the heart, a state of the heart after the chest is closed after a treatment is completed. The processing circuitry is configured to output a parameter related to the estimated state of the heart after the chest is closed to a display.Type: GrantFiled: March 31, 2020Date of Patent: May 31, 2022Assignees: The University of Tokyo, CANON MEDICAL SYSTEMS CORPORATIONInventors: Ichiro Sakuma, Minoru Ono, Eriko Maeda, Kan Nawata, Haruo Yamauchi, Hiroyuki Tsukihara, Kenji Ino, Fumimasa Shige, Katsuhiko Fujimoto, Takuya Sakaguchi
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Publication number: 20200337681Abstract: An ultrasound diagnostic system includes a plurality of elements arranged around a test object and emitting and receiving ultrasound, a control unit controlling such that at least one of the elements emits ultrasound and at least some of the elements receive scattered waves, a collection unit collecting measurement data obtained from the elements, a calculation unit that calculates, for a plurality of division regions into which an imaging region is divided, a scattered sound pressure intensity of each division region based on a first factor and a second factor of the division region, the first factor being constituted by arrival times which are each a period from emission to reception of ultrasound that is emitted from a predetermined element, scattered by the test object in the division region, and received by a corresponding one of the plurality of elements, and an image generation unit that generates a scattering image.Type: ApplicationFiled: October 23, 2018Publication date: October 29, 2020Inventors: Takashi AZUMA, Tianhan TANG, Ichiro SAKUMA, Hirofumi NAKAMURA
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Publication number: 20200311941Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain feature values related to the shape and a property of the heart. The processing circuitry is configured to estimate, by using the feature values, a state of the heart after a chest is opened. The processing circuitry is configured to estimate, based on a result of the estimation of the state of the heart, a state of the heart after the chest is closed after a treatment is completed. The processing circuitry is configured to output a parameter related to the estimated state of the heart after the chest is closed to a display.Type: ApplicationFiled: March 31, 2020Publication date: October 1, 2020Applicants: The University of Tokyo, CANON MEDICAL SYSTEMS CORPORATIONInventors: Ichiro Sakuma, Minoru Ono, Eriko Maeda, Kan Nawata, Haruo Yamauchi, Hiroyuki Tsukihara, Kenji Ino, Fumimasa Shige, Katsuhiko Fujimoto, Takuya Sakaguchi
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Publication number: 20200138802Abstract: Methods of further reducing cardiovascular risk in subjects with coronary artery disease on moderate intensity statins.Type: ApplicationFiled: November 3, 2019Publication date: May 7, 2020Inventors: Yasushi Saito, Ryozo Nagai, Masunori Matsuzaki, Takeshi Kimura, Hiroaki Shimokawa, Hiroyuki Daida, Satoshi Iimuro, Hiroshi Iwata, Yukio Ozaki, Ichiro Sakuma, Yoshihisa Nakagawa, Kiyoshi Hibi, Takafumi Hiro, Yoshihiro Fukumoto, Seiji Hokimoto, Katsumi Miyauchi, Yasuo Ohashi
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Publication number: 20200037908Abstract: An aspect of the present disclosure calculates a phase variance value indicating a degree of variance of a phase in a surrounding of each position in a biological tissue, based on phase values of excitation wave at respective positions in the biological tissue that acts in response to excitation caused by propagation of the excitation wave in the tissue, and generates an analysis map, based on a time series of at least part of the phase variance values at the respective positions. Since the phase variance value indicates the degree of variance of the phase in the surrounding, a position having a large degree of variance of the phase in the surrounding may be specified as a rotation center of rotating excitation wave.Type: ApplicationFiled: March 20, 2018Publication date: February 6, 2020Applicant: THE UNIVERSITY OF TOKYOInventors: Ichiro SAKUMA, Naoki TOMII, Hiroshi SENO, Haruo HONJO, Masatoshi YAMAZAKI
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Patent number: 10492872Abstract: A system stores clustering information obtained by clustering multiple sets of viewpoints relative to teeth of a three-dimensional model of a patient and projection images of a head including the teeth from the respective viewpoints. At the time of a surgery, the system creates comparative images from a photographed image taken by a monocular camera and searches for any viewpoint having a projection image similar to the comparative image sequentially from a first hierarchy to a final hierarchy in the clustering information. The system sets a representative viewpoint based on the viewpoint of the final hierarchy, restores position and posture of the teeth of the patient relative to the monocular camera as position and posture of the teeth of the three-dimensional model relative to the representative viewpoint, and generates and outputs a navigation image based on position and posture of surgical information relative to the teeth after the restoration.Type: GrantFiled: September 23, 2016Date of Patent: December 3, 2019Assignee: THE UNIVERSITY OF TOKYOInventors: Junchen Wang, Hideyuki Suenaga, Ichiro Sakuma, Etsuko Kobayashi, Kazuto Hoshi
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Patent number: 10478176Abstract: A tissue ligating device comprises a first fixation part to which a base end part of a suture thread is fixed and a second fixation part configured to allow insertion of the suture thread therethrough and allow to be crimped so as to newly fix a part of the suture thread, and thereby to define a loop starting from the base end part, in a state after ligation of tissue is performed. The second fixation part includes a back side wall part, a front side wall part, and a curved wall part turning back from the back side wall part to the front side wall part. An end part of the front side wall part far from the curved wall part is inclined or curved towards a front side.Type: GrantFiled: May 27, 2015Date of Patent: November 19, 2019Assignee: The University of TokyoInventors: Minoru Ono, Ichiro Sakuma
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Publication number: 20180280091Abstract: A system stores clustering information obtained by clustering multiple sets of viewpoints relative to teeth of a three-dimensional model of a patient and projection images of a head including the teeth from the respective viewpoints. At the time of a surgery, the system creates comparative images from a photographed image taken by a monocular camera and searches for any viewpoint having a projection image similar to the comparative image sequentially from a first hierarchy to a final hierarchy in the clustering information. The system sets a representative viewpoint based on the viewpoint of the final hierarchy, restores position and posture of the teeth of the patient relative to the monocular camera as position and posture of the teeth of the three-dimensional model relative to the representative viewpoint, and generates and outputs a navigation image based on position and posture of surgical information relative to the teeth after the restoration.Type: ApplicationFiled: September 23, 2016Publication date: October 4, 2018Applicant: THE UNIVERSITY OF TOKYOInventors: Junchen WANG, Hideyuki SUENAGA, Ichiro SAKUMA, Etsuko KOBAYASHI, Kazuto HOSHI
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Publication number: 20170224329Abstract: A tissue ligating device comprises a first fixation part to which a base end part of a suture thread is fixed and a second fixation part configured to allow insertion of the suture thread therethrough and allow to be crimped so as to newly fix a part of the suture thread, and thereby to define a loop starting from the base end part, in a state after ligation of tissue is performed. The second fixation part includes a back side wall part, a front side wall part, and a curved wall part turning back from the back side wall part to the front side wall part. An end part of the front side wall part far from the curved wall part is inclined or curved towards a front side.Type: ApplicationFiled: May 27, 2015Publication date: August 10, 2017Applicant: The University of TokyoInventors: Minoru Ono, Ichiro Sakuma
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Patent number: 8488269Abstract: A library apparatus includes a drive unit for writing data into or reading data from a cartridge, a cell unit having a plurality of cells to store the cartridges and a bottom plate in which a guide groove is formed, a movement unit for moving the cartridge along the guide groove between the cell and the drive unit, the movement unit being arranged under the cell unit, and a control unit for controlling the movement unit to move up through the guide groove, to engage the cartridge, and to move the engaged cartridge.Type: GrantFiled: January 6, 2011Date of Patent: July 16, 2013Assignee: Fujitsu LimitedInventors: Shoichi Okumura, Yoshio Kotaki, Ichiro Sakuma
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Publication number: 20120215109Abstract: When an amount of visceral fat is measured using ultrasonic waves during medical examination of metabolic syndrome, three contact positions are defined on the surface of the abdominal region, and three distances inside the living body are measured by bringing a probe into contact with the surface of the abdominal region at the contact positions. Specifically, three measurement paths having a starting point at the center of the descending aorta are set, and the distances from the center to a surface of the fat layer adjacent to the surface of the body (inner surface of the subcutaneous layer) in the measurement paths are observed. An approximate area of a visceral fat region can be determined from the three distances and two angles defined by the three measurement paths, and an index value is calculated on the basis of the area. A probe holder having three holding portions is desirably used.Type: ApplicationFiled: November 10, 2010Publication date: August 23, 2012Applicants: HITACHI ALOKA MEDICAL, LTD., THE UNIVERSITY OF TOKYOInventors: Naoto Kubota, Norihiro Koizumi, Hongen Liao, Takaharu Asano, Kazuhito Yuhashi, Mamoru Mitsuishi, Shin Ohnishi, Takashi Mochizuki, Ichiro Sakuma, Takashi Kadowaki
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Patent number: 8092471Abstract: A position measuring apparatus, for use in an assisting apparatus for surgical opertions, includes a position indicating apparatus for indicating a position and a direction of a tool, and three-dimensional position measuring apparatus for measuring a position and a direction of a surgical field and also the position and the direction of the tool. The position indicating apparatus and the three dimensional position measuring apparatus are unified in one body in the relative position thereof, so that a position for assistance of surgical operation is indicated in the form of an intersection line or an intersection point of the laser beams, irrespective of the position of the position measuring apparatus.Type: GrantFiled: November 20, 2003Date of Patent: January 10, 2012Assignee: Hitachi, Ltd.Inventors: Yasuyuki Momoi, Madoka Sugiura, Takahiro Ochi, Kazuo Yonenobu, Nobuhiko Sugano, Yoshinobu Sato, Yoshikazu Nakajima, Toshihiko Sasama, Takeyoshi Dohi, Ichiro Sakuma
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Publication number: 20110181980Abstract: A library apparatus includes a drive unit for writing data into or reading data from a cartridge, a cell unit having a plurality of cells to store the cartridges and a bottom plate in which a guide groove is formed, a movement unit for moving the cartridge along the guide groove between the cell and the drive unit, the movement unit being arranged under the cell unit, and a control unit for controlling the movement unit to move up through the guide groove, to engage the cartridge, and to move the engaged cartridge.Type: ApplicationFiled: January 6, 2011Publication date: July 28, 2011Applicant: FUJITSU LIMITEDInventors: Shoichi OKUMURA, Yoshio Kotaki, Ichiro Sakuma
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Publication number: 20080195161Abstract: [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: ApplicationFiled: April 11, 2006Publication date: August 14, 2008Inventors: Ichiro Sakuma, Itsuo Kodama, Kaichiro Kamiya, Haruo Honjo, Masatoshi Yamazaki, Takashi Ashihara, Kazuo Nakazawa
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Publication number: 20060142738Abstract: Provided is a unit used in a surgical operation using an endoscope, for example, to position the distal end of a surgical instrument to the region of a human body where medical treatment is required, without spreading a hole formed in the human body for insertion of the surgical instrument. This unit includes first and second output shafts pivotally connected to a movable member of the surgical instrument or the like, the first and second output shafts extending parallel to each other and being capable of reciprocating, and a drive unit for giving the first output shaft an arbitrary amount of advance/retraction and constantly giving the second output shaft an amount of advance/retraction of a constant ratio (#1) with respect to the amount of advance/retraction given to the first output shaft.Type: ApplicationFiled: October 16, 2003Publication date: June 29, 2006Inventors: Takeyoshi Dohi, Ichiro Sakuma, Etsuko Masamune, Daeyoung Kim, Toji Nakazawa
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Publication number: 20050015099Abstract: A position measuring apparatus, for use in an assisting apparatus for surgical opertions, comprises a position indicating means for indicating a position and a direction of a tool, and a three-dimensional position measuring means for measuring a position and a direction of a surgical field and also the position and the direction of the tool. The position indicating means and the three-dimensional position measuring means are unified in one body in the relative position thereof, so that a position for assistance of surgical operation is indicated in the form of an intersection line or an intersection point of the laser beams, irrespective of the position of the position measuring apparatus.Type: ApplicationFiled: November 20, 2003Publication date: January 20, 2005Inventors: Yasuyuki Momoi, Madoka Sugiura, Takahiro Ochi, Kazuo Yonenobu, Nobuhiko Sugano, Yoshinobu Sato, Yoshikazu Nakajima, Toshihiko Sasama, Takeyoshi Dohi, Ichiro Sakuma