Patents by Inventor Hiroto Kokubun

Hiroto Kokubun 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: 10433803
    Abstract: An X-ray CT apparatus and an image reconstruction method are configured (i) to determine a movement phase to be used for generating diagnostic images with a small number of operations and (ii) to acquire diagnostic images in a short time while reducing a burden on an operator, such as when the target in scanning is a moving site. For example, an image processing device of an X-ray CT apparatus obtains movement information of a diagnostic site (such as the heart), determines phase selection positions, permits the operator to select an arbitrary movement phase based on the acquired movement information, and reconstructs selection images in a plurality of movement phases for each of the determined phase selection positions using scan data before presentation.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: October 8, 2019
    Assignee: HITACHI, LTD.
    Inventor: Hiroto Kokubun
  • Publication number: 20180350045
    Abstract: To provide an image processing device and an image processing method capable of controlling contrast of a diagnosed part without greatly changing the characteristic of the entire image, and improving the diagnosis efficiency, an image processing device 100 sets a search pixel range and a search region to search for a representative pixel value as reference upon emphasis on the contrast of a diagnostic image as image data of a diagnosis object, calculates the representative pixel value for emphasis processing based on the set search pixel value range and the search region, and generates an emphasized image where the contrast of the entire diagnostic image is emphasized with the representative pixel value as reference.
    Type: Application
    Filed: January 27, 2017
    Publication date: December 6, 2018
    Applicant: Hitachi, Ltd.
    Inventors: Hiroto KOKUBUN, Fuyuhiko TERAMOTO
  • Publication number: 20170196527
    Abstract: In order to provide an X-ray CT apparatus and an image reconstruction method that can determine a movement phase to be used for generating diagnostic images with a small number of operations and can acquire diagnostic images in a short time while reducing a burden on an operator in scanning in which the target is a moving site, an image processing device 403 of an X-ray CT apparatus 1 obtains movement information of a diagnostic site (such as the heart), determines phase selection positions p1, p2, and . . . so that the operator selects an arbitrary movement phase based on the acquired movement information, and reconstructs selection images 80 in a plurality of movement phases (for example, 75% to 95% or the like) for each of the determined phase selection positions p1, p2, and . . . using scan data before presentation.
    Type: Application
    Filed: June 16, 2015
    Publication date: July 13, 2017
    Inventor: Hiroto KOKUBUN
  • Patent number: 9542762
    Abstract: To provide an X-ray CT apparatus and an image reconstruction method that can generate an image in which motion influence of a site to be scanned is reduced, the image processing device 403 of the X-ray CT apparatus 1 calculates a reconstruction data range which is a range of projection data to be used for reconstruction based on a motion direction of the site to be scanned. An image is reconstructed using the projection data in the calculated reconstruction data range. The reconstruction data range is set as the projection data in a projection range of at least 180 degrees or more including a projection direction that approximately corresponding to the motion direction of the site to be scanned.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: January 10, 2017
    Assignee: HITACHI, LTD.
    Inventors: Shuichi Okamoto, Hiroto Kokubun, Fuyuhiko Teramoto
  • Publication number: 20150356756
    Abstract: To provide an X-ray CT apparatus and an image reconstruction method that can generate an image in which motion influence of a site to be scanned is reduced, the image processing device 403 of the X-ray CT apparatus 1 calculates a reconstruction data range which is a range of projection data to be used for reconstruction based on a motion direction of the site to be scanned. An image is reconstructed using the projection data in the calculated reconstruction data range. The reconstruction data range is set as the projection data in a projection range of at least 180 degrees or more including a projection direction that approximately corresponding to the motion direction of the site to be scanned.
    Type: Application
    Filed: February 18, 2014
    Publication date: December 10, 2015
    Applicant: HITACHI MEDICAL CORPORTION
    Inventors: Shuichi OKAMOTO, Hiroto KOKUBUN, Fuyuhiko TERAMOTO
  • Patent number: 9129389
    Abstract: There is provided an X-ray CT apparatus capable of correcting the unevenness of the contrast concentration due to discontinuities in time between slices in contrast imaging using a Prospective Triggering method. In an X-ray CT apparatus 1, projection data in a specific phase of the heart is obtained by performing a scan by emitting X-rays after a predetermined time from the detection of the R wave of electrocardiogram information at each position of the heart in the body axis direction. An image processing device 4 reconstructs a tomographic image on the basis of collected projection data, calculates the projection data collection time in each scan from electrocardiogram information collected from an electrocardiograph 5, calculates the time between scans on the basis of the calculated projection data collection time, and corrects a concentration difference so as to change smoothly for an image of a position in the body axis direction in a range according to the time between scans.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: September 8, 2015
    Assignee: HITACHI MEDICAL CORPORATION
    Inventors: Takayuki Kadomura, Hiroto Kokubun
  • Patent number: 8830263
    Abstract: The medical image display device is provided with a medical image reading unit configured to read a medical image obtained by a medical image diagnostic apparatus, a projected image creating unit configured to project the medical image onto a projection plane to created the projected image, and a projected image display unit configured to display the projected image, wherein the projected image creating unit has a virtual liquid generating unit configured to generate virtual liquid, the light transmittance of which is not zero and a virtual liquid adding unit configured to add the virtual liquid to the surface of an organ within the medical image, and creates a projected image of the medical image to which the virtual liquid has been added.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: September 9, 2014
    Assignee: Hitachi Medical Corporation
    Inventors: Ryota Kohara, Hiroto Kokubun, Nobutaka Abe, Takashi Shirahata, Tetsuo Nakazawa
  • Patent number: 8818060
    Abstract: In a medical image display device for displaying a hollow organ of an examinee as a panoramic image, in order to inform an operator of the existence or nonexistence of a blind area in a panoramic image, the medical image display device has a panoramic image creating unit configured to create a panoramic image of a hollow organ of an examinee and a display unit configured to display the panoramic image, and further has a blind area detecting unit configured to detect a blind area in the panoramic image and an informing unit configured to inform an operator of the existence or nonexistence of the blind portion.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: August 26, 2014
    Assignee: Hitachi Medical Corporation
    Inventors: Takashi Shirahata, Hiroto Kokubun, Yoshihiro Goto
  • Publication number: 20140212016
    Abstract: There is provided an X-ray CT apparatus capable of correcting the unevenness of the contrast concentration due to discontinuities in time between slices in contrast imaging using a Prospective Triggering method. In an X-ray CT apparatus 1, projection data in a specific phase of the heart is obtained by performing a scan by emitting X-rays after a predetermined time from the detection of the R wave of electrocardiogram information at each position of the heart in the body axis direction. An image processing device 4 reconstructs a tomographic image on the basis of collected projection data, calculates the projection data collection time in each scan from electrocardiogram information collected from an electrocardiograph 5, calculates the time between scans on the basis of the calculated projection data collection time, and corrects a concentration difference so as to change smoothly for an image of a position in the body axis direction in a range according to the time between scans.
    Type: Application
    Filed: September 24, 2012
    Publication date: July 31, 2014
    Applicant: HITACHI MEDICAL CORPORATION
    Inventors: Takayuki Kadomura, Hiroto Kokubun
  • Patent number: 8755565
    Abstract: The X-ray CT apparatus which includes an X-ray generator and an X-ray detector for acquiring projection data of an object from plural angles and creates an arbitrary cross-sectional image of the object on the basis of the projection data includes: an extraction section which extracts a region, which includes a target organ moving periodically, from the cross-sectional image; a synchronous phase determination section which determines a synchronous phase, which is used when creating a synchronous cross-sectional image synchronized with periodic motion of the target organ, on the basis of continuity of the target organ in a direction perpendicular to the cross-sectional image; a synchronous cross-sectional image creating section which creates the synchronous cross-sectional image on the basis of projection data corresponding to the synchronous phase determined by the synchronous phase determination section; and a display unit which displays the synchronous cross-sectional image.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: June 17, 2014
    Assignee: Hitachi Medical Corporation
    Inventor: Hiroto Kokubun
  • Patent number: 8538113
    Abstract: A medical image processing device is configured to set a parameter to be used for detecting a lesion candidate region. For example, the medical image processing device is configured to input a first parameter P1 estimating a dimension of the lesion, calculate a second parameter P2 based on the first parameter P1, calculate a feature amount indicating a shape of an organ surface by using the second parameter in the medical image, and extract the lesion candidate region based on the calculated feature amount.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: September 17, 2013
    Assignee: Hitachi Medical Corporation
    Inventors: Shino Tanaka, Takashi Shirahata, Takayuki Kadomura, Hiroto Kokubun
  • Patent number: 8442292
    Abstract: An X-ray CT apparatus that can efficiently set a scanning condition in a scanning operation of a periodically moving internal organ such as a heart or the like is provided. The X-ray CT apparatus collects electrocardiographic information by using a periodic motion measuring device 6 (S1). Subsequently, an operator input a time resolution rate corresponding to time resolution expected in a target examination (S2). Subsequently, the X-ray CT apparatus calculates a scanning condition under which the input time resolution rate can be implemented (S3). Subsequently, the X-ray CT apparatus images a heart under the scanning condition calculated in S3 (S4). Subsequently, the X-ray CT apparatus reconstructs an electrocardiographic-synchronous image by using the scanning data obtained in S4 and the electrocardiographic information (S5). Subsequently, the X-ray CT apparatus displays the electrocardiographic-synchronous image reconstructed in S5 on a display device 5 (S6).
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: May 14, 2013
    Assignee: Hitachi Medical Corporation
    Inventor: Hiroto Kokubun
  • Patent number: 8285012
    Abstract: An image display apparatus according to the invention comprises reading section (11a) which reads in an image data set of a subject acquired by a medical imaging apparatus (2) from a data recording device (13) which stores the image data set; input sections (16, 17) which input a desired object organ to the read-in image data set; object organ extracting section (11b) which extracts the inputted object organ; reference position setting section (11h) which sets a reference position for producing an unfolded image in the circumferential direction of the bore of the extracted object organ; calculating device (11e) which calculates pixel information in the circumferential direction of the bore of the object organ from the set reference position; and image display section (15) which displays the calculated pixel information in the circumferential direction of the bore of the object organ.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: October 9, 2012
    Assignee: Hitachi Medical Corporation
    Inventors: Takayuki Kadomura, Osamu Miyazaki, Hiromitsu Hayashi, Hiroto Kokubun, Yoshihiro Goto
  • Publication number: 20120207355
    Abstract: The X-ray CT apparatus which includes an X-ray generator and an X-ray detector for acquiring projection data of an object from plural angles and creates an arbitrary cross-sectional image of the object on the basis of the projection data includes: an extraction section which extracts a region, which includes a target organ moving periodically, from the cross-sectional image; a synchronous phase determination section which determines a synchronous phase, which is used when creating a synchronous cross-sectional image synchronized with periodic motion of the target organ, on the basis of continuity of the target organ in a direction perpendicular to the cross-sectional image; a synchronous cross-sectional image creating section which creates the synchronous cross-sectional image on the basis of projection data corresponding to the synchronous phase determined by the synchronous phase determination section; and a display unit which displays the synchronous cross-sectional image.
    Type: Application
    Filed: November 4, 2010
    Publication date: August 16, 2012
    Applicant: HITACHI MEDICAL CORPORATION
    Inventor: Hiroto Kokubun
  • Publication number: 20120127200
    Abstract: The medical image display device is provided with a medical image reading unit configured to read a medical image obtained by a medical image diagnostic apparatus, a projected image creating unit configured to project the medical image onto a projection plane to created the projected image, and a projected image display unit configured to display the projected image, wherein the projected image creating unit has a virtual liquid generating unit configured to generate virtual liquid, the light transmittance of which is not zero and a virtual liquid adding unit configured to add the virtual liquid to the surface of an organ within the medical image, and creates a projected image of the medical image to which the virtual liquid has been added.
    Type: Application
    Filed: July 21, 2010
    Publication date: May 24, 2012
    Inventors: Ryota Kohara, Hiroto Kokubun, Nobutaka Abe, Takashi Shirahata, Tetsuo Nakazawa
  • Patent number: 8055045
    Abstract: A method includes a periodic motion data input step S208 of receiving input of periodic motion data indicating changes of the periodic motion with time in an object to be examined who is a target of image data collection, a step S214 of estimating fluctuations in the time resolution of the image data with time based on the periodic motion data, designating an image collection range in the object, and adjusting the collection position of the image data such that the image data is collected in the image collection range at a suitable time of image data collection, the estimated time resolution being set in a predetermined suitable range, and an image data collection position control step S216 of relatively moving at least a part of the image data collection range and the collection position of the image data such that the part of the range and the position are superimposed on each other within a time when the image data of the image data collection range has a time resolution within the desired range based on t
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: November 8, 2011
    Assignee: Hitachi Medical Corporation
    Inventors: Hiroto Kokubun, Osamu Miyazaki, Tetsuo Nakazawa
  • Publication number: 20110255755
    Abstract: In a medical image display device for displaying a hollow organ of an examinee as a panoramic image, in order to inform an operator of the existence or nonexistence of a blind area in a panoramic image, the medical image display device has a panoramic image creating unit configured to create a panoramic image of a hollow organ of an examinee and a display unit configured to display the panoramic image, and further has a blind area detecting unit configured to detect a blind area in the panoramic image and an informing unit configured to inform an operator of the existence or nonexistence of the blind portion.
    Type: Application
    Filed: December 22, 2009
    Publication date: October 20, 2011
    Applicant: HITACHI MEDICAL CORPORATION
    Inventors: Takashi Shirahata, Hiroto Kokubun, Yoshihiro Goto
  • Publication number: 20110164064
    Abstract: A medical image processing device 100 is configured to be able to set a parameter to be used for detecting a lesion candidate region in executing a processing of detecting the lesion candidate region from an image of an organ surface in order to provide an image processing device for detecting a lesion region under the condition that an operator is allowed to easily change a detection object in accordance with diagnostic purposes. For example, a parameter P1 to be set is a polyp diameter. Values in accordance with modes or operator's desired values are set as values of the parameter P1. CPU 101 further calculates a parameter P2 such as the inter-distance between differentiation reference points based on the set parameter P1, calculates the shape (curvature value) of each point on the organ surface using the parameter P2, and extracts a point having a predetermined shape as a lesion candidate region.
    Type: Application
    Filed: August 27, 2009
    Publication date: July 7, 2011
    Applicant: HITACHI MEDICAL CORPORATION
    Inventors: Shino Tanaka, Takashi Shirahata, Takayuki Kadomura, Hiroto Kokubun
  • Publication number: 20110164800
    Abstract: An X-ray CT apparatus that can efficiently set a scanning condition in a scanning operation of a periodically moving internal organ such as a heart or the like is provided. The X-ray CT apparatus collects electrocardiographic information by using a periodic motion measuring device 6 (S1). Subsequently, an operator input a time resolution rate corresponding to time resolution expected in a target examination (S2). Subsequently, the X-ray CT apparatus calculates a scanning condition under which the input time resolution rate can be implemented (S3). Subsequently, the X-ray CT apparatus images a heart under the scanning condition calculated in S3 (S4). Subsequently, the X-ray CT apparatus reconstructs an electrocardiographic-synchronous image by using the scanning data obtained in S4 and the electrocardiographic information (S5). Subsequently, the X-ray CT apparatus displays the electrocardiographic-synchronous image reconstructed in S5 on a display device 5 (S6).
    Type: Application
    Filed: June 29, 2009
    Publication date: July 7, 2011
    Inventor: Hiroto Kokubun
  • Publication number: 20100215225
    Abstract: An image display apparatus according to the invention comprises reading section (11a) which reads in an image data set of a subject acquired by a medical imaging apparatus (2) from a data recording device (13) which stores the image data set; input sections (16, 17) which input a desired object organ to the read-in image data set; object organ extracting section (11b) which extracts the inputted object organ; reference position setting section (11h) which sets a reference position for producing an unfolded image in the circumferential direction of the bore of the extracted object organ; calculating device (11e) which calculates pixel information in the circumferential direction of the bore of the object organ from the set reference position; and image display section (15) which displays the calculated pixel information in the circumferential direction of the bore of the object organ.
    Type: Application
    Filed: April 25, 2006
    Publication date: August 26, 2010
    Inventors: Takayuki Kadomura, Osamu Miyazaki, Hiromitsu Hayashi, Hiroto Kokubun, Yoshihiro Goto