Patents by Inventor Seiji Matsumoto

Seiji Matsumoto 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: 4356398
    Abstract: In a radiographic image recording system in which a stimulable phosphor plate is exposed to X-rays to record a radiographic latent image therein, the stimulable phosphor plate is exposed to stimulating rays thereafter to emit light according to the stored energy of X-rays, and the emitted light is detected by a photodetector and converted to an image signal to be used for finally recording a visible image on a photosensitive film or the like, a plurality of stimulable phosphor plates are used for recording radiographic images of an object viewed from the same direction. The image signals read out from the plurality of stimulable phosphor plates are superposed to obtain an averaged image signal. The averaged image signal is then subjected to a gradation process for enhancing the contrast of the image.
    Type: Grant
    Filed: July 11, 1980
    Date of Patent: October 26, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takao Komaki, Seiji Matsumoto, Masamitsu Ishida
  • Patent number: 4346409
    Abstract: A method of and apparatus for processing a radiographic image in a radiographic image recording system in which an image on a radiographic film is scanned and read out by a detector which gives an output to be processed and used for recording a visible image on a recording material. In the processing of the detected output, an operation represented by a formulaD'=Dorg+F(X)is conducted at every scanning point, where Dorg is the original density detected by the detector, X is Dorg-Dus, Dus is an unsharp mask density corresponding to a super-low spatial frequency, and F(X) is a monotone increasing function which satisfies the condition of F'(X.sub.1).gtoreq.F'(X.sub.2).gtoreq.0 for arbitrary values X.sub.1, X.sub.2 of X (.vertline.X.sub.1 .vertline.<.vertline.X.sub.2 .vertline.) and in which there exists at least one certain value X.sub.0 of X which satisfies the condition of F'(X.sub.1)>F'(X.sub.2) when .vertline.X.sub.1 .vertline.<.vertline.X.sub.0 .vertline.<.vertline.X.sub.2 .vertline..
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: August 24, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masamitsu Ishida, Hisatoyo Kato, Seiji Matsumoto
  • Patent number: 4346295
    Abstract: A radiation image recorded in a stimulable phosphor is read out by stimulating the phosphor with a stimulating ray to have the phosphor emit light and detecting the emitted light with a photodetector. A radiation image information thus obtained is read out by a photodetector by way of a light guide member which collects the light emitted by the phosphor and guides the collected light to a photodetector. The light guide member is made of a transparent sheet having smooth surfaces for effecting total reflection. The light guide member has a linear or arcuate end to be located adjacent to a scan line of the stimulable phosphor to receive and guide the light emitted by the phosphor and an annular end to be located adjacent to the light receiving face of the photodetector. The light entering the light guide member through the flat end is guided to the annular end by repeated total reflection.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: August 24, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuyoshi Tanaka, Hisatoyo Kato, Seiji Matsumoto
  • Patent number: 4340911
    Abstract: A method of and apparatus for processing a mammogram in a mammogram copying system in which an original mammogram is scanned with a scanning light beam and the light transmitted through the mammogram is detected by a photodetector which gives an output to be processed and used for recording a visible image on a recording medium. The image gradation of the mammogram is processed. The gradation processing is characterized in that the minimum density of the glandular tissue of the mammogram is lowered down to the level of the fog density to raise the contrast of the mammogram.
    Type: Grant
    Filed: February 22, 1980
    Date of Patent: July 20, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisatoyo Kato, Masamitsu Ishida, Seiji Matsumoto
  • Patent number: 4320296
    Abstract: In a radiation image recording system in which a stimulable phosphor sheet is exposed to an imagewise radiation to record a latent image of a radiation image in the form of stored energy of radiation, the stimulable phosphor sheet is then exposed to stimulating rays to emit light according to the stored energy of radiation, and the emitted light is detected to obtain an image signal, light spontaneously emitted from the stimulable phosphor sheet upon exposure to the imagewise radiation is detected. Then, image processing data such as the maximum value, the minimum value and/or the average value of the stored energy level over the entire area of the image are calculated based on the amount of the light, and is recorded on the stimulable phosphor sheet or the cassette thereof. The image processing data are used for processing the image signal when recording a final image on a recording material.
    Type: Grant
    Filed: July 11, 1980
    Date of Patent: March 16, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masamitsu Ishida, Hisatoyo Kato, Seiji Matsumoto
  • Patent number: 4317179
    Abstract: A method of and apparatus for processing a radiographic image in a radiographic image copying system in which an original radiograph scanned with the light beam and the image information of the radiograph is read out by a detector which gives an output to be processed and used for reproducing an image on a recording material. In the processing of the detected output, an operation represented by a formulaD'=Dorg+.beta.(Dorg-Dus)is conducted, where Dorg is the original image density detected by the detector, .beta. is an emphasis coefficient, and Dus is an unsharp mask density corresponding to a super-low spatial frequency at every scanning point. The unsharp masking process may be performed together with a gradation process, reduction of image size, smoothing process and the like. Further, the emphasis coefficient may be varied with either the original image density Dorg or the unsharp mask signal Dus.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: February 23, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisatoyc Kato, Masamitsu Ishida, Seiji Matsumoto
  • Patent number: 4315318
    Abstract: A method and apparatus for processing a radiation image in a radiation image recording system in which a stimulable phosphor is stimulated with a scanning stimulating beam and the light emitted from the stimulable phosphor upon stimulation by the stimulating beam is detected by a detector which generates an output which is processed and used for recording a visible image on a recording material. In the processing of the detected output, an operation represented by a formulaS'=Sorg+.beta. (Sorg--Sus)is conducted, where Sorg is the original image signal detected by the detector, .beta. is an emphasis coefficient, and Sus is an unsharp mask signal corresponding to a super-low spatial frequency at every scanning point. The unsharp masking process may be performed together with a gradation process, reduction of image size, smoothing process and the like. Further, the emphasis coefficient may be varied with either the original image signal Sorg or the unsharp mask signal Sus.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: February 9, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisatoyo Kato, Masamitsu Ishida, Seiji Matsumoto
  • Patent number: 4310886
    Abstract: A method and apparatus for processing a radiation image in a radiation image recording system in which a stimulable phosphor is stimulated with a scanning stimulating ray and the light emitted from the stimulable phosphor upon stimulation by the stimulating ray is detected by a photodetector which gives an output to be processed and used for recording a visible image on a recording medium. The radiation image of the frontal chest is gradation processed. The gradation processing is characterized in that the density at the boundary of the heart and the lungs of the image on the recording medium is lowered to lower the contrast of the heat and raise the contrast of the lungs.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: January 12, 1982
    Assignee: Fuji Photo Film, Co. Ltd.
    Inventors: Hisatoyo Kato, Masamitsu Ishida, Seiji Matsumoto
  • Patent number: 4306290
    Abstract: A method and apparatus for processing a frontal chest radiograph in a radiographic image copying system in which an original radiograph is scanned with a scanning light beam and the light transmitted through the radiograph is detected by a photodetector which gives an output to be processed and used for recording a visible image on a recording medium. The frontal chest radiograph is gradation processed. The gradation processing is characterized in that the density at the boundary of the heart and the lungs of the image on the recording medium is lowered to lower the contrast of the heart and raise the contrast of the lungs.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: December 15, 1981
    Assignee: Fuji Photo Film Co. Ltd.
    Inventors: Hisatoyo Kato, Masamitsu Ishida, Seiji Matsumoto
  • Patent number: 4302671
    Abstract: A radiation image recorded in a stimulable phosphor is read out by stimulating the stimulable phosphor by use of stimulating rays such as visible light or infrared rays. Upon stimulated, the stimulable phosphor emits light which is detectable by a photosensor. The radiation image readout device includes a photosensor for detecting the light emitted by the phosphor, and a reflecting optical element like a mirror located between the phosphor and the photodetector for reflecting stimulating rays advancing between the phosphor and the photosensor toward the phosphor. The reflecting optical element has a very small size not to intercept the light emitted by the phosphor and detected by the photosensor as much as possible.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: November 24, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisatoyo Kato, Seiji Matsumoto, Junji Miyahara
  • Patent number: 4302672
    Abstract: A method and apparatus for processing a radiation image in a radiation image recording system in which a stimulable phosphor is stimulated with a scanning stimulating ray and the light emitted from the stimulable phosphor upon stimulation by the stimulating ray is detected by a photodetector which gives an output to be processed and used for recording a visible image on a recording medium. The radiation image of the frontal chest is gradation processed. The gradation processing is characterized in that the density between the densities of the spine and the heart of the image on the recording medium is lowered to lower the contrast of the spine and raise the contrast of the heart and the lungs.
    Type: Grant
    Filed: February 22, 1980
    Date of Patent: November 24, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisatoyo Kato, Masamitsu Ishida, Seiji Matsumoto
  • Patent number: 4284889
    Abstract: In a method of recording a radiation image by use of a stimulable phosphor in which the stimulable phosphor is first exposed to an imagewise radiation to store the energy of the radiation and then is exposed to stimulating rays to emit light in accordance with the energy stored therein, the instantaneous emission of light emitted upon exposure of the stimulable phosphor to the radiation is detected to measure the level of the energy of the radiation stored in the phosphor. The instantaneous emission is detected by a photosensor which is located behind the phosphor. The output of the photosensor is utilized to control the density and/or contrast of the final image recorded on a photographic film which is recorded by use of the light emitted by the phosphor upon stimulated.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: August 18, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisatoyo Kato, Seiji Matsumoto, Junji Miyahara
  • Patent number: 4276473
    Abstract: In a radiation image recording system in which a radiation image is once recorded in a stimulable phosphor and then read out and reproduced on a recording material, the gradation of the radiation image is processed to enhance the diagnostic efficiency and accuracy of the image. The radiation image is read out by scanning the stimulable phosphor by a stimulating ray to cause the phosphor to emit light of the amount corresponding to the radiation energy stored in the phosphor. The emitted light is detected and converted to an electric signal. The level of the electric signal is converted in such a way that the maximum level of the signal corresponding to the maximum density of the radiation image is converted to a level resulting in the optical density of 1.5 to 2.8 in the reproduced image on a recording material and the minimum level corresponding to the minimum density is converted to a level resulting in the optical density of fog density of the recording material to fog density plus 0.
    Type: Grant
    Filed: February 26, 1980
    Date of Patent: June 30, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisatoyo Kato, Masamitsu Ishida, Seiji Matsumoto
  • Patent number: 4261854
    Abstract: A barium fluorohalide phosphor represented by the formulaBaFX:xCe,yAwherein X is at least one halogen selected from the group consisting of chlorine, bromine and iodine, A is at least one metallic element selected from the group consisting of indium, thallium, gadolinium, samarium and zirconium, and x and y are numbers satisfying the conditions of 0<x.ltoreq.2.times.10.sup.31 1 and 0<y.ltoreq.5.times.10.sup.-2, respectively. The phosphor emits stimulated light of higher luminance than the conventional cerium activated barium fluorohalide phosphor when stimulated by light of wavelength ranging from 450 to 800 nm after exposure to ionizing radiations such as X-rays or .gamma.-rays, ultraviolet rays, cathode rays, or the like. Further, the phosphor emits spontaneous light of high luminance when excited by ionizing radiations, ultraviolet rays, cathode rays, or the like.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: April 14, 1981
    Assignees: Kasei Optonix, Ltd., Fuji Photo Film Co., Ltd.
    Inventors: Noboru Kotera, Shusaku Eguchi, Junji Miyahara, Seiji Matsumoto, Hisatoyo Kato
  • Patent number: 4258264
    Abstract: A radiation image recorded in a stimulable phosphor sheet or plate is visualized by stimulating the phosphor with stimulating rays. Being stimulated by the stimulating rays, the phosphor emits detectable light. The emitted light is detected by a photodetector. The wavelength of the stimulating rays is selected within the range of 600 to 700 nm. The wavelength of the light detected by the photodetector is selected within the range of 300 to 500 nm.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: March 24, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Noboru Kotera, Syusaku Eguchi, Junji Miyahara, Seiji Matsumoto, Hisatoyo Kato
  • Patent number: 4239968
    Abstract: A radiation image is recorded on a stimulable phosphor and the recorded image is reproduced by utilizing the stimulability of the phosphor. As the phosphor is used an alkaline earth metal fluorohalide phosphor having high stimulability represented by the formula(Ba.sub.1-x M.sub.x.sup.II)FX:yAwherein M.sup.II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Cd, X is at least one halogen selected from the group consisting of Cl, Br and I, A is at least one element selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Yb and Er, and x and y are numbers satisfying the conditions of 0.ltoreq.x.ltoreq.0.6 and 0.ltoreq.y.ltoreq.0.2.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: December 16, 1980
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Noboru Kotera, Syusaku Eguchi, Junji Miyahara, Seiji Matsumoto, Hisatoyo Kato
  • Patent number: 4236078
    Abstract: A radiation image is recorded on a stimulable phosphor, and the recorded image is reproduced by utilizing the stimulability of the phosphor. As the phosphor is used at least one of the following phosphors.(a) a copper and lead activated zinc sulfide phosphor ZnS:Cu,Pb).(b) a phosphor included in a group of europium activated barium aluminate phosphors represented by the formulaBaO.xAl.sub.2 O.sub.3 :Euwherein x is a number satisfying the condition of 0.8.ltoreq.x.ltoreq.10.(c) a phosphor included in a group of divalent metal silicate phosphors represented by the formulaM.sup.II O.ySiO.sub.2 :Awherein M.sup.II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Ba, A is at least one element selected from the group consisting of Ce, Tb, Eu, Tm, Pb, Tl, Bi and Mn, and y is a number satisfying the condition of 0.5.ltoreq.y.ltoreq.2.5.
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: November 25, 1980
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Noboru Kotera, Syusaku Eguchi, Junji Miyahara, Seiji Matsumoto, Hisatoyo Kato
  • Patent number: 4234378
    Abstract: An improved method for manufacturing a magnet paper sheet which comprises: thoroughly mixing about 70-90 parts by weight of magnetoplumbite barium ferrite powder and/or magnetoplumbite strontium ferrite powder essentially consisting of particles of primary particle size of about 0.1-2 microns and of secondary particle size smaller than about 20 microns, an anionic synthetic latex containing about 1-10 parts by weight in dry weight of a synthetic rubber and/or a synthetic resin such as SBR, NBR, polyvinyl acetate and polyacrylate, about 2-10 weight % of a cationic organic polymer electrolyte such as polyamine and polyethyleneimine based on the amount of the synthetic rubber and/or resin, and more than about 5 parts by weight of pulp fibers together into a slurry; forming the slurry into a paper sheet; and magnetizing the paper sheet.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: November 18, 1980
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Susumu Iwasaki, Osamu Nagasawa, Tatsuo Takano, Seiji Matsumoto
  • Patent number: 4202871
    Abstract: Single crystalline, acicular ferric oxide particles are produced by maintaining an aqueous suspension of ferric hydroxide at an elevated temperature at an alkaline pH in the presence of an organic phosphonic acid compound or a hydroxycarboxylic acid compound as a growth-regulating agent.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: May 13, 1980
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Seiji Matsumoto, Tadashi Koga, Kiyoshi Fukai, Shinya Nakatani
  • Patent number: 4144808
    Abstract: An electrophotographic print marking apparatus for printing markings on rolled steel plates while the steel plates are being fed in a heated condition. A part of an image transfer belt which is brought to a transfer section where the powder image carried by the belt is transferred to the steel plate is made movable up and down by means of a pair of lower rollers. The rollers are moved up and down to bring the part of the belt in the transfer section close the steel plates when the powder image is transferred to the steel plates and to separate the belt far apart from the steel plates when the powder image is not transferred. A tension roller is provided to absorb the change in tension of the transfer belt accompanying the up and down movement of the lower rollers.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: March 20, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masakazu Iwasa, Seiji Matsumoto, Satoru Honjo, Teruo Iida