公开(公告)号：US11965948B2

公开(公告)日：2024-04-23

申请号：US18084613

申请日：2022-12-20

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yuichi Yamashita ,  Kazuto Nakabayashi ,  Hitoshi Kanazawa ,  Kazuya Okamoto ,  Hiroshi Takai ,  Nobuyuki Konuma ,  Kensuke Shinoda

IPC: G01V3/00 ,  G01R33/56 ,  G06T5/00 ,  G06T5/50

CPC classification number: G01R33/5608 ,  G06T5/002 ,  G06T5/50 ,  G06T2207/10088 ,  G06T2207/20212

Abstract: According to one embodiment, a medical information processing apparatus includes processing circuitry configured to derive an index value with respect to noise included in data associated with magnetic resonance signals collected by each of a plurality of reception coils, adjust a degree to which noise is removed from the data associated with the magnetic resonance signals based on the derived index value, remove noise from the data associated with the magnetic resonance signals based on the adjusted degree, and perform compositing of the data associated with the magnetic resonance signals from which noise has been removed.

公开(公告)号：US11112474B2

公开(公告)日：2021-09-07

申请号：US16532673

申请日：2019-08-06

Applicant: Canon Medical Systems Corporation

Inventor： Shuhei Nitta ,  Naho Imamura ,  Takahiro Ohmure ,  Hiroshi Takai ,  Nobuyasu Ichinose ,  Yoshimori Kassai

IPC: G01V3/00 ,  G01R33/48 ,  G01R33/54

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry acquires a first resonance frequency distribution of a first tissue and a second resonance frequency distribution of a second tissue which is different from the first tissue. The processing circuitry calculates a center frequency of a frequency-selective pulse that suppresses or emphasizes either one of the first tissue and the second tissue in accordance with the first and second resonance frequency distributions. The processing circuitry collects a magnetic resonance signal after the frequency-selective pulse is applied at the calculated center frequency.

公开(公告)号：US10942236B2

公开(公告)日：2021-03-09

申请号：US16147954

申请日：2018-10-01

Applicant: Canon Medical Systems Corporation

Inventor： Takahiro Tamura ,  Hiroshi Takai ,  Nobuyuki Konuma

IPC: G01R33/483 ,  G01R33/56 ,  G01R33/54 ,  G01R33/565 ,  G01R33/567 ,  G01R33/561

Abstract: A magnetic resonance imaging apparatus according to the present embodiment includes sequence control circuitry. The sequence control circuitry collect first MR data in a first cardiac cycle by excitation of a first region including a first slice, and collects reference data used for phase correction of second MR data on a second slice not included in the first region before and after the collection of the first MR data in the first cardiac cycle.

公开(公告)号：US11536790B2

公开(公告)日：2022-12-27

申请号：US16720356

申请日：2019-12-19

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Yuichi Yamashita ,  Kazuto Nakabayashi ,  Hitoshi Kanazawa ,  Kazuya Okamoto ,  Hiroshi Takai ,  Nobuyuki Konuma ,  Kensuke Shinoda

IPC: G01V3/00 ,  G01R33/56 ,  G06T5/00 ,  G06T5/50

Abstract: According to one embodiment, a medical information processing apparatus includes processing circuitry configured to derive an index value with respect to noise included in data associated with magnetic resonance signals collected by each of a plurality of reception coils, adjust a degree to which noise is removed from the data associated with the magnetic resonance signals based on the derived index value, remove noise from the data associated with the magnetic resonance signals based on the adjusted degree, and perform compositing of the data associated with the magnetic resonance signals from which noise has been removed.

公开(公告)号：US11415656B2

公开(公告)日：2022-08-16

申请号：US16774116

申请日：2020-01-28

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Kensuke Shinoda ,  Kazuto Nakabayashi ,  Hitoshi Kanazawa ,  Kazuya Okamoto ,  Hiroshi Takai ,  Nobuyuki Konuma ,  Yuichi Yamashita

IPC: G01R33/56 ,  G06T5/00 ,  G06T5/50 ,  A61B5/055 ,  A61B5/00 ,  G06T7/00

Abstract: A medical image processing apparatus of embodiments includes processing circuitry. The processing circuitry is configured to acquire a data and a g-factor map. The data is generated as a result of a reception by an RF coil. The processing circuitry is configured to determine strength of denoise performed on the data on the basis of the g-factor map and perform the denoise on the data.

公开(公告)号：US12229925B2

公开(公告)日：2025-02-18

申请号：US18304012

申请日：2023-04-20

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Hiroshi Takai ,  Kensuke Shinoda ,  Nobuyuki Konuma ,  Masahito Nambu

IPC: G06T5/70 ,  G01R33/56 ,  G01R33/561

Abstract: A medical information processing apparatus according to an embodiment includes processing circuitry. The processing circuitry calculates noise intensity from first data acquired during a first scan. The processing circuitry calculates a denoising intensity used for a denoising process based on the noise intensity and the difference between an imaging condition for the first scan and an imaging condition for a second scan, the denoising process being applied to second data obtained by the second scan.

公开(公告)号：US11815581B2

公开(公告)日：2023-11-14

申请号：US17734351

申请日：2022-05-02

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Kensuke Shinoda ,  Kazuto Nakabayashi ,  Hitoshi Kanazawa ,  Kazuya Okamoto ,  Hiroshi Takai ,  Nobuyuki Konuma ,  Yuichi Yamashita

IPC: G01R33/56 ,  G06T5/00 ,  G06T5/50 ,  A61B5/055 ,  A61B5/00 ,  G06T7/00

CPC classification number: G01R33/5608 ,  A61B5/055 ,  A61B5/7203 ,  G06T5/002 ,  G06T5/50 ,  G06T7/0012 ,  G06T2207/10088 ,  G06T2207/30004

Abstract: A medical image processing apparatus of embodiments includes processing circuitry. The processing circuitry is configured to acquire a data and a g-factor map. The data is generated as a result of a reception by an RF coil. The processing circuitry is configured to determine strength of denoise performed on the data on the basis of the g-factor map and perform the denoise on the data.

公开(公告)号：US10969452B2

公开(公告)日：2021-04-06

申请号：US16391384

申请日：2019-04-23

Applicant: Canon Medical Systems Corporation

Inventor： Shuhei Nitta ,  Nobuyasu Ichinose ,  Hiroshi Takai ,  Naho Imamura

IPC: G01R33/483 ,  G01R33/54

Abstract: An MRI apparatus includes imaging control circuitry that performs shimming imaging for collecting a first MR signal, and multi-slice imaging for collecting a second MR signal along with radiation of a non-region-selective prepulse, and processing circuitry that generates static magnetic field distributions of the slices, determines a first center frequency of an RF pulse corresponding to each slice and a second center frequency of the prepulse based on the static magnetic field distribution, and determines an order of slices for collecting the second MR signal in accordance with the first and/or second center frequencies, wherein the imaging control circuitry performs the multi-slice imaging in accordance with the order and the first and second center frequencies.

公开(公告)号：US11669938B2

公开(公告)日：2023-06-06

申请号：US16845176

申请日：2020-04-10

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Hiroshi Takai ,  Kensuke Shinoda ,  Nobuyuki Konuma ,  Masahito Nambu

IPC: G06T5/00 ,  G01R33/56 ,  G01R33/561

CPC classification number: G06T5/002 ,  G01R33/5608 ,  G01R33/5611 ,  G06T2207/10088

Abstract: A medical information processing apparatus according to an embodiment includes processing circuitry. The processing circuitry calculates noise intensity from first data acquired during a first scan. The processing circuitry calculates a denoising intensity used for a denoising process based on the noise intensity and the difference between an imaging condition for the first scan and an imaging condition for a second scan, the denoising process being applied to second data obtained by the second scan.

公开(公告)号：US11138769B2

公开(公告)日：2021-10-05

申请号：US16409105

申请日：2019-05-10

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Masaaki Nagashima ,  Hiroshi Takai

IPC: G06T11/00 ,  G01R33/567 ,  G01R33/561 ,  G01R33/48 ,  G01R33/563

Abstract: An image reconstruction method according to an embodiment includes: collecting first k-space data at a first time and second k-space data having an undersampled pattern different from an undersampled pattern of the first k-space data at a second time different from the first time; generating intermediate data by converting data including the first k-space data and the second k-space data; generating, by inversely converting the intermediate data, third k-space data and fourth k-space data that correspond to the first k-space data and the second k-space data, respectively, and in each of which at least part of a region undersampled through the corresponding undersampled pattern is filled; and generating a magnetic resonance image at a time different from any of the first time and the second time by converting k-space data obtained by combining at least part of the third k-space data and at least part of the fourth k-space data.