Patents by Inventor Keiichi Gotoh

Keiichi Gotoh 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: 10349907
    Abstract: The disclosure provides a radiographic imaging device that improves visibility by preventing a phenomenon in which a stent image is inverted in an enlarged displayed video of a stent image that appears in a live image. Specifically, the present disclosure is provided with a trimming unit that performs editing such that, from among two stent markers indicating the position of a stent image that appears in a superimposed frame generated by superimposing source frames that serve as the source of a live image, a specific stent marker is constantly oriented in the same direction on the frame. As a result of using the trimming unit to edit superimposed frames that are continuously generated, a problem seen in the prior art wherein an object to be displayed within video playback is inverted does not occur.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: July 16, 2019
    Assignee: Shimadzu Corporation
    Inventors: Kazuhiko Tsutsui, Shouta Satou, Keiichi Gotoh, Takanori Yoshida
  • Publication number: 20170209109
    Abstract: The purpose of the present disclosure is to provide a radiographic imaging device in which visibility is improved by preventing a phenomenon in which a stent image is inverted in an enlarged displayed video of a stent image that appears in a live image. The present disclosure makes it possible to provide a radiographic imaging device in which visibility is improved by preventing a phenomenon in which a stent image is inverted in an enlarged displayed video of a stent image that appears in a live image. Specifically, the present disclosure is provided with a trimming unit that performs editing such that, from among two stent markers indicating the position of a stent image that appears in a superimposed frame generated by superimposing source frames that serve as the source of a live image, a specific stent marker is constantly oriented in the same direction on the frame.
    Type: Application
    Filed: July 17, 2015
    Publication date: July 27, 2017
    Inventors: Kazuhiko TSUTSUI, Shouta SATOU, Keiichi GOTOH, Takanori YOSHIDA
  • Patent number: 7620141
    Abstract: The present invention relates to an X-ray imaging apparatus using a technique for preventing artifacts appearing in 3D X-ray images. The technique involves subtraction images obtained by an energy subtraction unit serving as the basis for a 3D reconstruction process for acquiring a 3D X-ray image selectively showing a site of interest in a patient. The technique also involves an image subtraction process carried out by the energy subtraction unit according to weights set by a weight setter which selects only the site of interest in the patient, and eliminates soft tissue forming a background around the site of interest. As a result, even if body motion occurs with the soft tissue forming the background around the site of interest of the patient while subtraction images are acquired one after another by the energy subtraction unit, the body motion in the soft tissue of the patient never appears as artifacts on the subtraction images, or on a 3D X-ray image acquired on the basis of the subtraction images.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: November 17, 2009
    Assignee: Shimadzu Corporation
    Inventor: Keiichi Gotoh
  • Publication number: 20090010380
    Abstract: According to this invention, subtraction images obtained by an energy subtraction unit 15 serve as the basis for a 3D reconstruction process for acquiring a 3D X-ray image selectively showing a site of interest in a patient M. In addition, an image subtraction process carried out by the energy subtraction unit 15 according to weights set by a weight setter 14 selects only the site of interest in the patient M, and eliminates soft tissue forming a background around the site of interest. As a result, even if body motion occurs with the soft tissue forming the background around the site of interest of the patient M while subtraction images are acquired one after another by the energy subtraction unit 15, the body motion in the soft tissue of the patient M never appears as artifacts on the subtraction images, or on a 3D X-ray image acquired on the basis of the subtraction images.
    Type: Application
    Filed: January 23, 2007
    Publication date: January 8, 2009
    Inventor: Keiichi Gotoh