Patents by Inventor Taiga Yamaya

Taiga Yamaya 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: 10942235
    Abstract: PET or SPECT insert for MRI or MRS system with medium (3 T for example) to ultra high (7 T for example) magnetic field is provided. RF shielded radiation detector modules are separately disposed in a form of full or partial ring shape. The RF shielded radiation detector modules are electric ground conductors for microstrip transmission line coil RF array. Decoupling circuits in between grounded shield and/or in between microstrip conductors make electric isolation between coil elements.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: March 9, 2021
    Assignee: NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY
    Inventors: Md Shahadat Hossain Akram, Takayuki Obata, Taiga Yamaya
  • Patent number: 10627466
    Abstract: A PET/MRI device includes an MRI device that has a measurement port, a PET detector that can be inserted into the measurement port, and a mechanism that can slide the PET detector into and out of the MRI measurement port. Thereby, the PET/MRI device allows MRI measurement during PET measurement.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: April 21, 2020
    Assignee: NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY
    Inventors: Taiga Yamaya, Takayuki Obata
  • Patent number: 10444383
    Abstract: A partial-ring PET device, in which some of coincidence radiation detectors to be arranged in a ring shape around a field of view for detecting lines of response of annihilation radiations are missing, is compensated for a drop in image quality due to the missing of the coincidence radiation detectors by including single gamma-ray radiation detectors for detecting at least either one of the annihilation radiations as a single gamma-ray. This can reduce missing of projection angles and reduce artifacts in PET images.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: October 15, 2019
    Assignee: NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY
    Inventors: Taiga Yamaya, Hideaki Tashima
  • Publication number: 20190302206
    Abstract: PET or SPECT insert for MRI or MRS system with medium (3 T for example) to ultra high (7 T for example) magnetic field is provided. RF shielded radiation detector modules are separately disposed in a form of full or partial ring shape. The RF shielded radiation detector modules are electric ground conductors for microstrip transmission line coil RF array. Decoupling circuits in between grounded shield and/or in between microstrip conductors make electric isolation between coil elements.
    Type: Application
    Filed: March 28, 2019
    Publication date: October 3, 2019
    Applicant: NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY
    Inventors: Md Shahadat Hossain Akram, Takayuki OBATA, Taiga YAMAYA
  • Patent number: 10234570
    Abstract: In a PET device, a first detector includes a plurality of first scintillators and detects gamma rays emitted from positron-emitting radionuclides injected into a subject. A second detector is provided on the outer circumferential side of the first detector, includes a plurality of second scintillators arranged in an arrangement surface density lower than that of the first scintillators, and detects gamma rays that have passed through the first detector. A counted information acquiring unit acquires, as first counted information and second counted information, the detection positions, energy values, and detection time regarding gamma rays detected by the first detector and the second detector. Based on the detection time contained in each of the first counted information and the second counted information, an energy value adder generate corrected counted information by summing the energy values contained in the first counted information and the second counted information.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: March 19, 2019
    Assignees: Toshiba Medical Systems Corporation, National Institutes for Quantum and Radiological Science and Technology
    Inventors: Taiga Yamaya, Takayuki Obata, Iwao Kanno, Takuzo Takayama, Hitoshi Yamagata, Kazuya Okamoto
  • Publication number: 20180239037
    Abstract: A partial-ring PET device, in which some of coincidence radiation detectors to be arranged in a ring shape around a field of view for detecting lines of response of annihilation radiations are missing, is compensated for a drop in image quality due to the missing of the coincidence radiation detectors by including single gamma-ray radiation detectors for detecting at least either one of the annihilation radiations as a single gamma-ray. This can reduce missing of projection angles and reduce artifacts in PET images.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 23, 2018
    Applicant: NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY
    Inventors: Taiga YAMAYA, Hideaki TASHIMA
  • Patent number: 9933529
    Abstract: A layered three-dimensional radiation position detector includes two-dimensional scintillator arrays that are pixelated by optically discontinuous surfaces and stacked on a light receiving surface of a light receiving element, responses of scintillator elements detecting radiations being made identifiable on the light receiving surface to obtain a three-dimensional radiation detection position. A scintillator array lying on a radiation incident surface side has a pixel pitch smaller than that of a scintillator array lying on a light receiving element side so that the scintillator array on the radiation incident surface side has increased resolution. A layered three-dimensional radiation position detector achieving both low cost and high resolution can thus be provided.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: April 3, 2018
    Assignee: NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY
    Inventors: Eiji Yoshida, Taiga Yamaya
  • Patent number: 9880236
    Abstract: In a PET (Positron Emission Tomography)-MRI (Magnetic Resonance Imaging) apparatus of an embodiment, a magnet that is a seamless structure generates a static magnetic field in a bore having a cylindrical shape. First detectors and second detectors are each formed in a ring shape and detect gamma rays emitted from positron emitting radionuclides injected into a subject. The first detectors and the second detectors are disposed with a space therebetween in an axial direction of the bore so as to interpose the magnetic field center of the static magnetic field therebetween.
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: January 30, 2018
    Assignees: National Institute for Quantum and Radiological Science and Technology, Toshiba Medical Systems Corporation
    Inventors: Takayuki Obata, Taiga Yamaya, Iwao Kanno, Hitoshi Yamagata, Takuzo Takayama, Kazuya Okamoto
  • Patent number: 9864028
    Abstract: In a PET (Positron Emission Tomography)-MRI (Magnetic Resonance Imaging) apparatus of an embodiment, a transmitting radio frequency coil applies a radio frequency magnetic field on a subject placed in a static magnetic field. A detector is formed in a ring shape, disposed on a side adjacent to an outer circumference of the transmitting radio frequency coil, includes at least two PET detectors disposed with a space therebetween in an axial direction of a bore so as to interpose the magnetic field center of the static magnetic field therebetween, and detects gamma rays emitted from positron emitting radionuclides injected into the subject. Radio frequency shields are each formed in an approximately cylindrical shape, disposed between the transmitting radio frequency coil and the detector, and shield the radio frequency magnetic field generated by the transmitting radio frequency coil.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: January 9, 2018
    Assignees: National Institutes for Quantum and Radiological Science and Technology, Toshiba Medical Systems Corporation
    Inventors: Iwao Kanno, Takayuki Obata, Taiga Yamaya, Kazuya Okamoto, Takuzo Takayama, Hitoshi Yamagata
  • Publication number: 20170285184
    Abstract: A layered three-dimensional radiation position detector includes two-dimensional scintillator arrays that are pixelated by optically discontinuous surfaces and stacked on a light receiving surface of a light receiving element, responses of scintillator elements detecting radiations being made identifiable on the light receiving surface to obtain a three-dimensional radiation detection position. A scintillator array lying on a radiation incident surface side has a pixel pitch smaller than that of a scintillator array lying on a light receiving element side so that the scintillator array on the radiation incident surface side has increased resolution. A layered three-dimensional radiation position detector achieving both low cost and high resolution can thus be provided.
    Type: Application
    Filed: March 30, 2017
    Publication date: October 5, 2017
    Applicant: NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY
    Inventors: Eiji YOSHIDA, Taiga YAMAYA
  • Publication number: 20170168127
    Abstract: A PET/MRI device includes an MRI device that has a measurement port, a PET detector that can be inserted into the measurement port, and a mechanism that can slide the PET detector into and out of the MRI measurement port. Thereby, the PET/MRI device allows MRI measurement during PET measurement.
    Type: Application
    Filed: January 11, 2017
    Publication date: June 15, 2017
    Applicant: c/o National Institutes For Quantum And Radiological Science And Technology
    Inventors: Taiga YAMAYA, Takayuki OBATA
  • Patent number: 9538964
    Abstract: An inclined PET device is provided in which the cut plane of a detector ring upon which a plurality of PET detectors are disposed is inclined so that it does not intersect perpendicularly with the long axis of a bed that carries a subject to be examined and in which an open space that passes through the bed in a direction perpendicular to the long axis thereof is formed, in order to enable access to the subject to be examined. The PET detectors are disposed and stacked in a direction parallel to the long axis of the bed. Thereby, the number of PET detectors is reduced and device cost is reduced, while the detector ring as well as the device can be miniaturized. At the same time, the open space that passes through the bed in a direction perpendicular to the long axis can be preserved.
    Type: Grant
    Filed: May 30, 2011
    Date of Patent: January 10, 2017
    Assignees: NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY, HAMAMATSU PHOTONICS K.K.
    Inventors: Taiga Yamaya, Hideaki Tashima, Mitsuo Watanabe, Eiichi Tanaka
  • Patent number: 9510797
    Abstract: In the integrated PET/MRI scanner provided with an RF coil for MRI and a plurality of PET detectors in the measuring port of the MRI scanner, the PET detectors are disposed with spaces therebetween and at least the transmitting coil elements of the RF coil for MRI are disposed between adjacent PET detectors. Here, the PET detectors are disposed in the circumferential direction of the measuring port with spaces therebetween and the transmitting coil elements are disposed in the axial direction of the measuring port. Alternatively, at least some of the PET detectors are disposed in the axial direction of the measuring port with spaces therebetween and the transmitting coil elements are disposed between adjacent PET detectors. The PET detectors can be DOI-type detectors capable of detecting position in the depth direction.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: December 6, 2016
    Assignees: NATIONAL INSTITUTE OF RADIOLOGICAL SICENCES, HAMAMATSU PHOTONICS K.K.
    Inventors: Taiga Yamaya, Fumihiko Nishikido, Takayuki Obata, Mikio Suga, Kazuyuki Saito, Mitsuo Watanabe, Eiichi Tanaka
  • Patent number: 9342903
    Abstract: When an image for PET attenuation correction is generated from an MR image, the MR image captured by MRI is segmented into regions according to pixel values. In a region in which a radiation attenuation coefficient is considered to be uniform, a radiation attenuation correction value is determined by referring to an existing radiation attenuation correction value table. In a region including multiple tissues having different radiation attenuation coefficients, a radiation attenuation correction value is determined by referring to a standard image. In such a manner, an image for PET attenuation correction in which tissues having similar pixel values in the MR image but different attenuation coefficients for radiation can be distinguished and that can accommodate individual differences and an affected area such as a space occupying lesion (for example, a cancer, abscess, or the like) and an organic defect is generated.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: May 17, 2016
    Assignees: NATIONAL INSTITUTE OF RADIOLOGICAL SERVICES, SHIMADZU CORPORATION
    Inventors: Taiga Yamaya, Takayuki Obata, Mikio Suga, Hiroshi Kawaguchi, Yoshiyuki Yamakawa
  • Patent number: 9226717
    Abstract: A helmet-type PET device includes a helmet portion (hemispherical detector) and an added portion (jaw portion detector, an ear portion detector, or a neck portion detector). The helmet portion includes a PET detector so as to cover a parietal region of an examination target. The added portion is positioned to dispose a PET detector at a part other than the parietal region of the examination target. PET measurement is performed using both an output from the PET detector at the helmet portion and an output from the PET detector at the added portion.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: January 5, 2016
    Assignee: NATIONAL INSTITUTE OF RADIOLOGICAL SCIENCES
    Inventors: Hideaki Tashima, Taiga Yamaya
  • Patent number: 9176237
    Abstract: In a coincidence determination of a PET device, the PET device uses a scintillator of radioactive isotope containing background noise due to intrinsic radioactivity as a radiation detector. The PET device counts a pair of annihilation radiations that is assumed to occur from a same nuclide. The annihilation radiations are detected within a predetermined coincidence time window by a plurality of radiation detectors. The method includes determining a coincidence with a wide energy window that allows detecting the background noise due to intrinsic radioactivity as multiple coincidences; removing the multiple coincidences; and using an energy window narrower than the wide energy window to limit a coincidence event to a coincidence event in a photopeak from a positron nuclide only.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: November 3, 2015
    Assignee: NATIONAL INSTITUTE OF RADIOLOGICAL SCIENCES
    Inventors: Eiji Yoshida, Taiga Yamaya
  • Patent number: 9029789
    Abstract: A light receiver for detecting incident time is installed on the side of a radiation source of a scintillator (including a Cherenkov radiation emitter), and information (energy, incident time, an incident position, etc.) on radiation made incident into the scintillator is obtained by the output of the light receiver. It is, thereby, possible to identify an incident position and others of radiation into the scintillator at high accuracy.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: May 12, 2015
    Assignee: National Institute of Radiological Sciences
    Inventors: Kengo Shibuya, Taiga Yamaya, Naoko Inadama, Fumihiko Nishikido, Eiji Yoshida, Hideo Murayama
  • Patent number: 9029787
    Abstract: In an open PET device including a plurality of detector rings that are arranged apart in the direction of the body axis of a subject and having a physical open field of view area, at least one of the detector rings or another imaging device arranged in parallel is configured to be movable by simple device moving means in order to change the configuration of the PET device. This improves the versatility of the open PET device for easier introduction to facilities.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: May 12, 2015
    Assignee: National Institute of Radiological Sciences
    Inventors: Taiga Yamaya, Hideo Murayama
  • Patent number: 9029790
    Abstract: In imaging on the basis of list mode data of a list of radioactive count data detected by a nuclear medicine imaging apparatus for measuring radiation in a pulse mode, the processing from the measurement to imaging of radiation is accelerated substantially to the real time level by selecting the number of count data to be used for online imaging computations on the basis of the counting rate of radiation.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: May 12, 2015
    Assignee: National Institute of Radiological Sciences
    Inventors: Taiga Yamaya, Eiji Yoshida
  • Publication number: 20150115162
    Abstract: A helmet-type PET device includes a helmet portion (hemispherical detector) and an added portion (jaw portion detector, an ear portion detector, or a neck portion detector). The helmet portion includes a PET detector so as to cover a parietal region of an examination target. The added portion is positioned to dispose a PET detector at a part other than the parietal region of the examination target. PET measurement is performed using both an output from the PET detector at the helmet portion and an output from the PET detector at the added portion.
    Type: Application
    Filed: September 24, 2014
    Publication date: April 30, 2015
    Inventors: Hideaki TASHIMA, Taiga YAMAYA