Patents by Inventor Kiyoshi Hagiwara

Kiyoshi Hagiwara 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: 10705227
    Abstract: [Problem] Provided is a layered structure in which a non-scintillator layer is utilized as a light transmission path to a sensor so as to transmit light in a vertical direction through the non-scintillator layer without allowing the light to re-enter a scintillator layer. [Means for Solution] Provided is a scintillator panel having a structure in which a scintillator layer and a non-scintillator layer are repeatedly arranged in a direction substantially parallel to a radiation incident direction. In this scintillator panel, the scintillator layer contains at least a phosphor, a binder resin, and voids; the non-scintillator layer is radiolucent; the scintillator layer and the non-scintillator layer have an irregular structure at their interface; and an arithmetic surface roughness Ra attributed to irregularities is 1/400 to 1/10 of the width of the non-scintillator layer.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: July 7, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiromichi Shindou, Kiyoshi Hagiwara
  • Patent number: 10663603
    Abstract: A scintillator panel includes a laminated scintillator having a structure obtained by repeatedly disposing a scintillator layer and a non-scintillator layer in a direction substantially parallel to an incident direction of a radiation, wherein the scintillator layer contains at least a phosphor, a binder resin, and voids, and the non-scintillator layer is transparent, and an average refractive index n1 of the binder resin and the voids of the scintillator layer and a refractive index n2 of the non-scintillator layer satisfy a relationship of formula (A) 0.9?(n2/n1).
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: May 26, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Kiyoshi Hagiwara, Hiromichi Shindou
  • Publication number: 20190324158
    Abstract: [Problem] Provided is a layered structure in which a non-scintillator layer is utilized as a light transmission path to a sensor so as to transmit light in a vertical direction through the non-scintillator layer without allowing the light to re-enter a scintillator layer. [Means for Solution] Provided is a scintillator panel having a structure in which a scintillator layer and a non-scintillator layer are repeatedly arranged in a direction substantially parallel to a radiation incident direction. In this scintillator panel, the scintillator layer contains at least a phosphor, a binder resin, and voids; the non-scintillator layer is radiolucent; the scintillator layer and the non-scintillator layer have an irregular structure at their interface; and an arithmetic surface roughness Ra attributed to irregularities is 1/400 to 1/10 of the width of the non-scintillator layer.
    Type: Application
    Filed: April 17, 2019
    Publication date: October 24, 2019
    Inventors: Hiromichi SHINDOU, Kiyoshi HAGIWARA
  • Publication number: 20190219712
    Abstract: A scintillator panel includes a laminated scintillator having a structure obtained by repeatedly disposing a scintillator layer and a non-scintillator layer in a direction substantially parallel to an incident direction of a radiation, wherein the scintillator layer contains at least a phosphor, a binder resin, and voids, and the non-scintillator layer is transparent, and an average refractive index n1 of the binder resin and the voids of the scintillator layer and a refractive index n2 of the non-scintillator layer satisfy a relationship of formula (A) 0.9?(n2/n1).
    Type: Application
    Filed: January 14, 2019
    Publication date: July 18, 2019
    Inventors: Kiyoshi HAGIWARA, Hiromichi Shindou
  • Patent number: 9748013
    Abstract: A scintillator panel includes a support and a scintillator layer, wherein the scintillator layer includes scintillator particles, a binder resin, and a void, and the porosity of the scintillator layer is from 14 to 35% by volume.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: August 29, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yoshito Yamamoto, Kiyoshi Hagiwara
  • Patent number: 9739895
    Abstract: The scintillator panel includes a support, a reflective layer on the support, and a scintillator layer formed on the reflective layer by deposition. The reflective layer includes light-scattering particles and a binder resin. The light scattering particles are buried in the binder resin such that there is an area free of light scattering particles in the reflective layer.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: August 22, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takehiko Shoji, Kiyoshi Hagiwara, Tadashi Arimoto
  • Patent number: 9557424
    Abstract: An object of the invention is to provide a scintillator panel which exhibits excellent cuttability and can be cut without the occurrence of problems such as the separation of a scintillator layer and which can give radiographic images such as X-ray images with excellent sensitivity and sharpness. The scintillator panel of the invention includes a reflective layer and a scintillator layer formed by deposition on a support, and the reflective layer includes light-scattering particles and a specific binder resin and has a specific thickness.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: January 31, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tadashi Arimoto, Kiyoshi Hagiwara
  • Publication number: 20160282480
    Abstract: A scintillator panel includes a support and a scintillator layer, wherein the scintillator layer includes scintillator particles, a binder resin, and a void, and the porosity of the scintillator layer is from 14 to 35% by volume.
    Type: Application
    Filed: March 11, 2016
    Publication date: September 29, 2016
    Inventors: Yoshito YAMAMOTO, Kiyoshi HAGIWARA
  • Publication number: 20160216383
    Abstract: The scintillator panel includes a support, a reflective layer on the support, and a scintillator layer formed on the reflective layer by deposition. The reflective layer includes light-scattering particles and a binder resin. The light scattering particles are buried in the binder resin such that there is an area free of light scattering particles in the reflective layer.
    Type: Application
    Filed: April 1, 2016
    Publication date: July 28, 2016
    Inventors: Takehiko SHOJI, Kiyoshi Hagiwara, Tadashi Arimoto
  • Patent number: 9329281
    Abstract: The scintillator panel includes a support, a reflective layer on the support, and a scintillator layer formed on the reflective layer by deposition. The reflective layer includes light-scattering particles and a binder resin. A specific region of the reflective layer is defined by a resin or includes light-scattering particles having a specific area average particle diameter, or the reflective layer has a specific arithmetic average roughness.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: May 3, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takehiko Shoji, Kiyoshi Hagiwara, Tadashi Arimoto
  • Publication number: 20150316660
    Abstract: An object of the invention is to provide a scintillator panel which exhibits excellent cuttability and can be cut without the occurrence of problems such as the separation of a scintillator layer and which can give radiographic images such as X-ray images with excellent sensitivity and sharpness. The scintillator panel of the invention includes a reflective layer and a scintillator layer formed by deposition on a support, and the reflective layer includes light-scattering particles and a specific binder resin and has a specific thickness.
    Type: Application
    Filed: July 2, 2015
    Publication date: November 5, 2015
    Inventors: Tadashi ARIMOTO, Kiyoshi HAGIWARA
  • Patent number: 9121951
    Abstract: An object of the invention is to provide a scintillator panel which exhibits excellent cuttability and can be cut without the occurrence of problems such as the separation of a scintillator layer and which can give radiographic images such as X-ray images with excellent sensitivity and sharpness. The scintillator panel of the invention includes a reflective layer and a scintillator layer formed by deposition on a support, and the reflective layer includes light-scattering particles and a specific binder resin and has a specific thickness.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: September 1, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tadashi Arimoto, Kiyoshi Hagiwara
  • Publication number: 20140239195
    Abstract: An object of the invention is to provide a scintillator panel which exhibits excellent cuttability and can be cut without the occurrence of problems such as the separation of a scintillator layer and which can give radiographic images such as X-ray images with excellent sensitivity and sharpness. The scintillator panel of the invention includes a reflective layer and a scintillator layer formed by deposition on a support, and the reflective layer includes light-scattering particles and a specific binder resin and has a specific thickness.
    Type: Application
    Filed: February 14, 2014
    Publication date: August 28, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Tadashi ARIMOTO, Kiyoshi HAGIWARA
  • Publication number: 20140239196
    Abstract: An object of the invention is to provide scintillator panels which can give radiographic images such as X-ray images with excellent sharpness and excellent uniformity of sharpness, which realize devices such as flat panel detectors having uniform image quality characteristics in the light-receiving plane, and which exhibit excellent cuttability, excellent sharpness and excellent in-plane uniformity of sharpness. A scintillator panel of the invention includes a support, a reflective layer on the support, and a scintillator layer formed on the reflective layer by deposition. The reflective layer includes light-scattering particles and a binder resin. A specific region of the reflective layer is defined by a resin or includes light-scattering particles having a specific area average particle diameter, or the reflective layer has a specific arithmetic average roughness.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 28, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Takehiko SHOJI, Kiyoshi HAGIWARA, Tadashi ARIMOTO
  • Patent number: 7655926
    Abstract: Provided are a rare earth activated alkaline earth metal fluorohalide stimulable phosphor exhibiting high image quality of radiation images and reduction of luminance degradation, and a radiation image conversion panel employing the stimulable phosphor represented by Formula (1) Ba(1-x)M2(x)FBr(y)I(1-y):aM1, bLn, cO, wherein M1 is at least an alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; M2 is at least an alkaline earth metal selected from the group consisting of Be, Mg, Sr and Ca; Ln is at least a rare earth element selected from the group consisting of Ce, Pr, Sm, Eu, Gd, Tb, Tm, Dy, Ho, Nd, Er and Yb; and x, y, a, b and c are values meeting the following conditions: 0?x?0.3, 0?y?0.9, 0?a?0.05 0<b?0.2 and 0?c?0.1, wherein a spectral width at 80% intensity to the maximum intensity of an instantaneous excitation spectrum is 23.0 nm or less.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: February 2, 2010
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventor: Kiyoshi Hagiwara
  • Publication number: 20090039287
    Abstract: Provided are a rare earth activated alkaline earth metal fluorohalide stimulable phosphor exhibiting high image quality of radiation images and reduction of luminance degradation, and a radiation image conversion panel employing the stimulable phosphor represented by Formula (1) Ba(1-x)M2(x)FBr(y)I(1-y):aM1, bLn, cO, wherein M1 is at least an alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; M2 is at least an alkaline earth metal selected from the group consisting of Be, Mg, Sr and Ca; Ln is at least a rare earth element selected from the group consisting of Ce, Pr, Sm, Eu, Gd, Tb, Tm, Dy, Ho, Nd, Er and Yb; and x, y, a, b and c are values meeting the following conditions: 0?x?0.3, 0?y?0.9, 0?a?0.05 0<b?0.2 and 0?c?0.1, wherein a spectral width at 80% intensity to the maximum intensity of an instantaneous excitation spectrum is 23.0 nm or less.
    Type: Application
    Filed: March 1, 2006
    Publication date: February 12, 2009
    Applicant: KONICA MINOLTA MEDICAL & GRAPHIC, INC.
    Inventor: Kiyoshi Hagiwara
  • Patent number: 7372046
    Abstract: An objective is to provide a radiation image conversion panel exhibiting excellent graininess and reduced x-ray damage (luminance degradation) . A radiation image conversion panel comprising a support and provided thereon, a stimulable phosphor layer containing a stimulable phosphor in a polymer resin, wherein a luminescence intensity ratio of (A) stimulable phosphor particles comprising a smallest average particle diameter to (B) stimulable phosphor particles comprising a largest average particle diameter is 0.81.2, provided that a total average particle diameter of all the stimulable phosphor particles is 3.0-10.0 ?m, an average particle diameter of (A) is 2.0-6.0 ?m, an average particle diameter of (B) is 6-15 ?m, and a content of (A) or (B) is within the range of at least 10% by weight and at most 90% by weight, based on the total stimulable phosphor content.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: May 13, 2008
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventors: Kiyoshi Hagiwara, Hideaki Wakamatsu, Natsuki Ito
  • Publication number: 20070246661
    Abstract: An objective is to provide a radiation image conversion panel exhibiting excellent graininess and reduced x-ray damage (luminance degradation). A radiation image conversion panel comprising a support and provided thereon, a stimulable phosphor layer containing a stimulable phosphor in a polymer resin, wherein a luminescence intensity ratio of (A) stimulable phosphor particles comprising a smallest average particle diameter to (B) stimulable phosphor particles comprising a largest average particle diameter is 0.8-1.2, provided that a total average particle diameter of all the stimulable phosphor particles is 3.0-10.0 ?m, an average particle diameter of (A) is 2.0-6.0 ?m, an average particle diameter of (B) is 6-15 ?m, and a content of (A) or (B) is within the range of at least 10% by weight and at most 90% by weight, based on the total stimulable phosphor content.
    Type: Application
    Filed: September 29, 2005
    Publication date: October 25, 2007
    Applicant: KONICA MINOLTA MEDICAL & GRAPHIC, INC.
    Inventors: Kiyoshi Hagiwara, Hideaki Wakamatsu, Natsuki Ito
  • Patent number: 7196340
    Abstract: It is an object of the present invention to provide a radiation image conversion panel exhibiting durability. By providing a radiation image conversion panel possessing a phosphor sheet having a support and provided thereon a stimulable phosphor layer and a protective film which covers the phosphor sheet, and an electrically conductive layer is designed to be provided on at least one of the surfaces on the stimulable phosphor layer side of the phosphor sheet and on the stimulable phosphor layer side of the protective film, undesired electrons generated within the stimulable phosphor layer can be removed via the electrically conductive layer, whereby degradation of the stimulable phosphor caused by the electrons is prevented, thereby improving durability.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: March 27, 2007
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventors: Kiyoshi Hagiwara, Natsuki Kasai
  • Publication number: 20060056587
    Abstract: A radiographic imaging device comprising a short-focus radiation source which radiates radiant rays to an examined object, a member to hold the examined object, and a radiographic image detector which detects radiant rays passing through the examined object and reads radiographic image information therefrom in order to perform phase contrast photography on the object which is held by the holding member, wherein said detector is equipped with a phosphor plate which contains photostimulable phosphor particles having polyhedron crystal structures and the photostimulable phosphor occupies 60 to 80% of the photostimulable phosphor layer on the phosphor plate.
    Type: Application
    Filed: September 12, 2005
    Publication date: March 16, 2006
    Inventors: Hirobumi Yamashita, Kiyoshi Hagiwara