Patents by Inventor Kunio Shiraishi

Kunio Shiraishi 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: 11357457
    Abstract: According to one embodiment, an X-ray diagnosis apparatus includes an X-ray tube, an X-ray detector, an operating unit, and processing circuitry. The processing circuitry determines a focal-spot size of X-rays in second moving picture imaging after first moving picture imaging, based on an output of the X-ray detector in the first moving picture imaging, and determines a focal-spot size of X-rays in third moving picture imaging after the second moving picture imaging, based on an output of the X-ray detector in the second moving picture imaging.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: June 14, 2022
    Assignee: Canon Medical Systems Corporation
    Inventors: Takuya Aida, Kunio Shiraishi
  • Patent number: 11334998
    Abstract: According to one embodiment, a medical image processing apparatus includes processing circuitry. The processing circuitry specifies, before position alignment between a first X-ray image and a second X-ray image which is acquired with a device inserted, a device area candidate in the second X-ray image as a candidate of an area where the device appears. The processing circuitry performs the position alignment using first processing of removing the specified device area candidate or second processing of reducing a contribution of the specified device area candidate.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: May 17, 2022
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hirona Oikawa, Shingo Abe, Kunio Shiraishi, Toshiya Waku, Shumpei Ohashi, Akihito Takahashi, Saki Hashimoto, Jumpei Ogasawara
  • Patent number: 11324470
    Abstract: An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube, an X-ray detector, and processing circuitry. The X-ray tube exposes X-rays. The X-ray detector detects the X-rays exposed from the X-ray tube. The processing circuitry generates an X-ray image on the basis of a first detection result that is a detection result of the X-rays exposed for an irradiation period. The processing circuitry corrects the X-ray image on the basis of a second detection result that is a detection result of the X-rays until a point before the end of the irradiation period.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: May 10, 2022
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Kunio Shiraishi
  • Patent number: 11179125
    Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to sequentially obtain X-ray images. The processing circuitry is configured to sequentially generate average images by using the obtained plurality of X-ray images, in parallel to the obtainment of the X-ray images. The processing circuitry is configured to sequentially generate difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the obtainment of the X-ray images and the generation of the average images.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: November 23, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Shumpei Ohashi, Yoshiaki Iijima, Kunio Shiraishi
  • Publication number: 20210038180
    Abstract: An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube, an X-ray detector, and processing circuitry. The X-ray tube exposes X-rays. The X-ray detector detects the X-rays exposed from the X-ray tube. The processing circuitry generates an X-ray image on the basis of a first detection result that is a detection result of the X-rays exposed for an irradiation period. The processing circuitry corrects the X-ray image on the basis of a second detection result that is a detection result of the X-rays until a point before the end of the irradiation period.
    Type: Application
    Filed: July 29, 2020
    Publication date: February 11, 2021
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Kunio Shiraishi
  • Publication number: 20200334815
    Abstract: According to one embodiment, a medical image processing apparatus includes processing circuitry. The processing circuitry specifies, before position alignment between a first X-ray image and a second X-ray image which is acquired with a device inserted, a device area candidate in the second X-ray image as a candidate of an area where the device appears. The processing circuitry performs the position alignment using first processing of removing the specified device area candidate or second processing of reducing a contribution of the specified device area candidate.
    Type: Application
    Filed: April 21, 2020
    Publication date: October 22, 2020
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Hirona OIKAWA, Shingo ABE, Kunio SHIRAISHI, Toshiya WAKU, Shumpei OHASHI, Akihito TAKAHASHI, Saki HASHIMOTO, Jumpei OGASAWARA
  • Publication number: 20200315557
    Abstract: According to one embodiment, an X-ray diagnosis apparatus includes an X-ray tube, an X-ray detector, an operating unit, and processing circuitry. The processing circuitry determines a focal-spot size of X-rays in second moving picture imaging after first moving picture imaging, based on an output of the X-ray detector in the first moving picture imaging, and determines a focal-spot size of X-rays in third moving picture imaging after the second moving picture imaging, based on an output of the X-ray detector in the second moving picture imaging.
    Type: Application
    Filed: April 1, 2020
    Publication date: October 8, 2020
    Applicant: Canon Medical Systems Corporation
    Inventors: Takuya AIDA, Kunio SHIRAISHI
  • Patent number: 10758199
    Abstract: In an X-ray diagnostic apparatus according to an embodiment, an X-ray generator configured to irradiate an X-ray to a subject. An X-ray detector configured to detect the X-ray. Processing circuitry configured to generate a plurality of X-ray images chronologically based on X-rays that have passed through the subject to which a contrast media is injected, and that have been detected by the X-ray detector. The processing circuitry configured to extract a first image from among the X-ray images, the first image when any one of a change in a pixel value between predetermined two images and a predetermined region in one image is equal to or smaller than a threshold. A display configured to display, after the first image is extracted, a plurality of X-ray images that have been generated prior to the first image in reverse chronological order.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: September 1, 2020
    Assignee: Canon Medical Systems Corporation
    Inventors: Yoshiyasu Hayashi, Nobuo Kobayashi, Kunio Shiraishi
  • Patent number: 10679097
    Abstract: An image processing apparatus according to an embodiment comprises processing circuitry configured to determine whether each pixel included in a radiation image is equivalent to point-like noise, calculate a degree of similarity between a first pixel and a second pixel that are included in the radiation image, conduct weighted averaging on the first pixel and the second pixel in accordance with the degree of similarity calculated, thereby performing a filtering process on the radiation image, and compare, if it is determined that the first pixel is equivalent to the point-like noise, first neighboring pixels located around the first pixel with second neighboring pixels located around the second pixel without using a comparison result between the first pixel and the second pixel, thereby calculating the degree of similarity.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: June 9, 2020
    Assignee: Canon Medical Systems Corporation
    Inventor: Kunio Shiraishi
  • Patent number: 10575809
    Abstract: An X-ray diagnosis apparatus according to an embodiment acquires a first X-ray image and a second X-ray image by using mutually-different radiation doses; acquires a third X-ray image based on X-rays radiated onto a region of interest of the subject and onto a region other than the region of interest in mutually-different radiation doses; obtains position information of the region of interest; and on a basis of the position information, generates a subtraction image by calculating a difference between the region of interest in the third X-ray image and a region corresponding to the region of interest in the first X-ray image and calculating a difference between the region other than the region of interest in the third X-ray image and a region corresponding to the region other than the region of interest in the second X-ray image.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: March 3, 2020
    Assignee: Canon Medical Systems Corporation
    Inventors: Masaki Akiyama, Kunio Shiraishi, Ko Fuchigami, Makoto Kaneko, Tadaharu Kobayashi
  • Publication number: 20190328345
    Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to sequentially obtain X-ray images. The processing circuitry is configured to sequentially generate average images by using the obtained plurality of X-ray images, in parallel to the obtainment of the X-ray images. The processing circuitry is configured to sequentially generate difference images by performing a difference calculating process between the X-ray images and the average images, in parallel to the obtainment of the X-ray images and the generation of the average images.
    Type: Application
    Filed: April 25, 2019
    Publication date: October 31, 2019
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Shumpei OHASHI, Yoshiaki IIJIMA, Kunio SHIRAISHI
  • Patent number: 10278667
    Abstract: An X-ray diagnostic apparatus of an embodiment includes an image generator, a detection unit, and an irradiation control unit. The image generator successively generates X-ray images based on X-rays emitted from an X-ray tube and transmitted through a subject. The detection unit detects a position of a predetermined target included in the successively generated X-ray images. The irradiation control unit identifies, based on the detected position of the predetermined target, a region in which the predetermined target can be visualized in the X-ray images, and performs control to reduce an X-ray irradiation dose to a region other than the identified region.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: May 7, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Yoshiaki Iijima, Ryoichi Nagae, Yasuto Hayatsu, Kunio Shiraishi, Yoshinori Shimizu, Yuichiro Watanabe
  • Patent number: 10198793
    Abstract: An image processing apparatus includes a processor that acquires medical image data and performs noise reduction in at least two of three different directions in the medical image data in a predetermined order.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: February 5, 2019
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Satoru Ohishi, Kunio Shiraishi, Hisato Takemoto
  • Patent number: 10159455
    Abstract: An X-ray diagnosis apparatus according to an embodiment includes an X-ray tube, judging circuitry, and grid controlling circuitry. The X-ray tube is configured to radiate X-rays. The judging circuitry is configured to judge whether a voltage should be applied to a grid of the X-ray tube or not, in accordance with a radiation condition. The grid controlling circuitry is configured to apply the voltage to the grid, if the judging circuitry has determined that the voltage should be applied.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: December 25, 2018
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Makoto Takanaka, Kunio Shiraishi, Shinsuke Ooie, Kentarou Nishikawa
  • Patent number: 10130324
    Abstract: According to one embodiment, an image analysis device includes a parameter value acquisition unit, a color allocation unit and a time phase image generation unit. The parameter value acquisition unit acquires a parameter value per pixel, on the basis of time variation of pixel values per pixel corresponding to the same region of an object in image data of a plurality of sequential DSA images. The color allocation unit generates a color map in which a (chromatic) color in accordance with the parameter value is allocated per pixel corresponding to the same region of the object. The time phase image generation unit generates color image data of time phase images respectively corresponding to a plurality of time phases, by reflecting information in accordance with pixel values of the DSA images to each pixel of the color map.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: November 20, 2018
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Ryoichi Nagae, Yoshinori Shimizu, Nobuo Kobayashi, Keisuke Nakamura, Kunio Shiraishi
  • Publication number: 20180211132
    Abstract: An image processing apparatus according to an embodiment comprises processing circuitry configured to determine whether each pixel included in a radiation image is equivalent to point-like noise, calculate a degree of similarity between a first pixel and a second pixel that are included in the radiation image, conduct weighted averaging on the first pixel and the second pixel in accordance with the degree of similarity calculated, thereby performing a filtering process on the radiation image, and compare, if it is determined that the first pixel is equivalent to the point-like noise, first neighboring pixels located around the first pixel with second neighboring pixels located around the second pixel without using a comparison result between the first pixel and the second pixel, thereby calculating the degree of similarity.
    Type: Application
    Filed: January 12, 2018
    Publication date: July 26, 2018
    Applicant: Canon Medical Systems Corporation
    Inventor: Kunio Shiraishi
  • Patent number: 10007976
    Abstract: An image processing apparatus according to an embodiment includes a first frequency image generating circuitry, a second frequency image generating circuitry, a signal detecting circuitry, and a display image generating circuitry. The first frequency image generating circuitry performs, on an object pixel of processing, processing based on a pixel value of a neighboring pixel positioned close to the pixel to generate first frequency image data including a specific contrast component and a first frequency component on image data. The second frequency image generating circuitry performs processing of subtracting the first frequency image data from the image data to generate second frequency image data including a second frequency component. The signal detecting circuitry detects a linear signal derived from a linear structural object from the second frequency image data. The display image generating circuitry generates a display image according to the linear signal detected.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: June 26, 2018
    Assignees: National Institute of Technology, Toshiba Medical Systems Corporation
    Inventors: Michitaka Honda, Kunio Shiraishi, Takuya Sakaguchi
  • Patent number: 9974507
    Abstract: An X-ray diagnosis apparatus includes an X-ray tube, an X-ray detector, and a processing circuitry. The X-ray tube generates X-rays. The X-ray detector detects the X-rays that have passed through a subject. The processing circuitry calculates, for each of a plurality of X-ray images that are acquired chronologically, an average of pixel values and a reference value based on the pixel values. The processing circuitry extracts, from the plurality of X-ray images, an X-ray image with a relatively large difference between the average and the reference value, an X-ray image with a relatively large ratio between the average and the reference value, or an X-ray image with a relatively large number of pixels each representing a value equal to or larger than the average or the reference value.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: May 22, 2018
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Kunio Shiraishi, Toshiaki Kawano, Hisayasu Yumiza, Makoto Takanaka
  • Publication number: 20180055472
    Abstract: According to one embodiment, an image analysis device includes a parameter value acquisition unit, a color allocation unit and a time phase image generation unit. The parameter value acquisition unit acquires a parameter value per pixel, on the basis of time variation of pixel values per pixel corresponding to the same region of an object in image data of a plurality of sequential DSA images. The color allocation unit generates a color map in which a (chromatic) color in accordance with the parameter value is allocated per pixel corresponding to the same region of the object. The time phase image generation unit generates color image data of time phase images respectively corresponding to a plurality of time phases, by reflecting information in accordance with pixel values of the DSA images to each pixel of the color map.
    Type: Application
    Filed: October 27, 2017
    Publication date: March 1, 2018
    Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Ryoichi NAGAE, Yoshinori Shimizu, Nobuo Kobayashi, Keisuke Nakamura, Kunio Shiraishi
  • Patent number: RE48583
    Abstract: When a plurality of X-ray images in a time sequence is stored in an image data storing unit (25), a marker coordinate detecting unit (26a) detects coordinates of a stent marker in each X-ray image, and a motion vector calculating unit (26b) calculates, with coordinates of the stent marker detected in a first frame as reference coordinates, a motion vector of the coordinates of the stent marker detected in each X-ray image of a second and subsequent frames with respect to the reference coordinates. Then, a filter application range determining unit (26c) moves and determines an application range of a smoothing filter in each X-ray image based on the motion vector, and the filtered image generating unit (26d) generates a filtered image by performing a process by the smoothing filter between application ranges determined in a process target image and a reference image.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: June 8, 2021
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Takuya Sakaguchi, Kunio Shiraishi, Masayuki Nishiki, Kyojiro Nambu