Patents by Inventor Shohei HAMANAGA

Shohei HAMANAGA 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: 11723551
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a processing circuitry. Regarding the k-space data obtained as a result of performing multi-shot imaging that includes a plurality of shots, the processing circuitry obtains a correction coefficient, based on first-type magnetic resonance images generated using the k-space data, the correction coefficient correcting phase shifting occurring in read out direction among the plurality of shots. Then, the processing circuitry corrects the k-space data based on the correction coefficients. Moreover, the processing circuitry generates a second-type magnetic resonance image using the corrected k-space data.
    Type: Grant
    Filed: October 18, 2021
    Date of Patent: August 15, 2023
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Shohei Hamanaga, Mitsuhiro Bekku
  • Publication number: 20230221393
    Abstract: An image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain two magnetic resonance images corresponding to two phase encoding directions opposite to each other. The processing circuitry is configured to generate a shift map related to shifting a plurality of pixels in the two magnetic resonance images, by optimizing a cost function using a first difference between the two magnetic resonance images and a second difference between two edge images generated on the basis of the two magnetic resonance images. The processing circuitry is configured to generate a correction image obtained by correcting distortions of the two magnetic resonance images on the basis of the two magnetic resonance images and the shift map.
    Type: Application
    Filed: December 20, 2022
    Publication date: July 13, 2023
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventor: Shohei HAMANAGA
  • Publication number: 20230126958
    Abstract: An MRI apparatus includes a scanner configured to apply an RF pulse to an object and processing circuity configured to: set a first pulse sequence in which acquisition of a first set of MR signals is started after a first delay time from application of a first excitation pulse, and a second pulse sequence in which acquisition of a second set of MR signals is started after a second delay time from application of a second excitation pulse, the second delay time being different from the first delay time; acquire first and second sets of MR signals by causing the scanner to apply the first and second pulse sequences to the object; generate a combined dataset by averaging a first dataset based on the first set of MR signals and a second dataset based on the second set of MR signals; and reconstruct an MR image based on the combined dataset.
    Type: Application
    Filed: October 17, 2022
    Publication date: April 27, 2023
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Shohei HAMANAGA, Yuki TAKAI
  • Publication number: 20220133169
    Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a processing circuitry. Regarding the k-space data obtained as a result of performing multi-shot imaging that includes a plurality of shots, the processing circuitry obtains a correction coefficient, based on first-type magnetic resonance images generated using the k-space data, the correction coefficient correcting phase shifting occurring in read out direction among the plurality of shots. Then, the processing circuitry corrects the k-space data based on the correction coefficients. Moreover, the processing circuitry generates a second-type magnetic resonance image using the corrected k-space data.
    Type: Application
    Filed: October 18, 2021
    Publication date: May 5, 2022
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Shohei HAMANAGA, Mitsuhiro BEKKU