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).
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Patent number: 10705227Abstract: [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: GrantFiled: April 17, 2019Date of Patent: July 7, 2020Assignee: KONICA MINOLTA, INC.Inventors: Hiromichi Shindou, Kiyoshi Hagiwara
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Patent number: 10663603Abstract: 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: GrantFiled: January 14, 2019Date of Patent: May 26, 2020Assignee: Konica Minolta, Inc.Inventors: Kiyoshi Hagiwara, Hiromichi Shindou
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Publication number: 20190324158Abstract: [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: ApplicationFiled: April 17, 2019Publication date: October 24, 2019Inventors: Hiromichi SHINDOU, Kiyoshi HAGIWARA
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Publication number: 20190219712Abstract: 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: ApplicationFiled: January 14, 2019Publication date: July 18, 2019Inventors: Kiyoshi HAGIWARA, Hiromichi Shindou
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Patent number: 9748013Abstract: 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: GrantFiled: March 11, 2016Date of Patent: August 29, 2017Assignee: KONICA MINOLTA, INC.Inventors: Yoshito Yamamoto, Kiyoshi Hagiwara
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Patent number: 9739895Abstract: 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: GrantFiled: April 1, 2016Date of Patent: August 22, 2017Assignee: KONICA MINOLTA, INC.Inventors: Takehiko Shoji, Kiyoshi Hagiwara, Tadashi Arimoto
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Patent number: 9557424Abstract: 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: GrantFiled: July 2, 2015Date of Patent: January 31, 2017Assignee: KONICA MINOLTA, INC.Inventors: Tadashi Arimoto, Kiyoshi Hagiwara
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Publication number: 20160282480Abstract: 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: ApplicationFiled: March 11, 2016Publication date: September 29, 2016Inventors: Yoshito YAMAMOTO, Kiyoshi HAGIWARA
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Publication number: 20160216383Abstract: 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: ApplicationFiled: April 1, 2016Publication date: July 28, 2016Inventors: Takehiko SHOJI, Kiyoshi Hagiwara, Tadashi Arimoto
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Patent number: 9329281Abstract: 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: GrantFiled: February 19, 2014Date of Patent: May 3, 2016Assignee: KONICA MINOLTA, INC.Inventors: Takehiko Shoji, Kiyoshi Hagiwara, Tadashi Arimoto
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Publication number: 20150316660Abstract: 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: ApplicationFiled: July 2, 2015Publication date: November 5, 2015Inventors: Tadashi ARIMOTO, Kiyoshi HAGIWARA
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Patent number: 9121951Abstract: 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: GrantFiled: February 14, 2014Date of Patent: September 1, 2015Assignee: KONICA MINOLTA, INC.Inventors: Tadashi Arimoto, Kiyoshi Hagiwara
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Publication number: 20140239195Abstract: 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: ApplicationFiled: February 14, 2014Publication date: August 28, 2014Applicant: Konica Minolta, Inc.Inventors: Tadashi ARIMOTO, Kiyoshi HAGIWARA
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Publication number: 20140239196Abstract: 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: ApplicationFiled: February 19, 2014Publication date: August 28, 2014Applicant: Konica Minolta, Inc.Inventors: Takehiko SHOJI, Kiyoshi HAGIWARA, Tadashi ARIMOTO
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Patent number: 7655926Abstract: 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: GrantFiled: March 1, 2006Date of Patent: February 2, 2010Assignee: Konica Minolta Medical & Graphic, Inc.Inventor: Kiyoshi Hagiwara
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Publication number: 20090039287Abstract: 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: ApplicationFiled: March 1, 2006Publication date: February 12, 2009Applicant: KONICA MINOLTA MEDICAL & GRAPHIC, INC.Inventor: Kiyoshi Hagiwara
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Patent number: 7372046Abstract: 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: GrantFiled: September 29, 2005Date of Patent: May 13, 2008Assignee: Konica Minolta Medical & Graphic, Inc.Inventors: Kiyoshi Hagiwara, Hideaki Wakamatsu, Natsuki Ito
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Publication number: 20070246661Abstract: 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: ApplicationFiled: September 29, 2005Publication date: October 25, 2007Applicant: KONICA MINOLTA MEDICAL & GRAPHIC, INC.Inventors: Kiyoshi Hagiwara, Hideaki Wakamatsu, Natsuki Ito
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Patent number: 7196340Abstract: 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: GrantFiled: September 6, 2005Date of Patent: March 27, 2007Assignee: Konica Minolta Medical & Graphic, Inc.Inventors: Kiyoshi Hagiwara, Natsuki Kasai
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Publication number: 20060056587Abstract: 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: ApplicationFiled: September 12, 2005Publication date: March 16, 2006Inventors: Hirobumi Yamashita, Kiyoshi Hagiwara