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公开(公告)号：US11112474B2
公开(公告)日：2021-09-07
申请号：US16532673
申请日：2019-08-06
发明人： Shuhei Nitta , Naho Imamura , Takahiro Ohmure , Hiroshi Takai , Nobuyasu Ichinose , Yoshimori Kassai
摘要： 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.
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公开(公告)号：US10942236B2
公开(公告)日：2021-03-09
申请号：US16147954
申请日：2018-10-01
发明人： Takahiro Tamura , Hiroshi Takai , Nobuyuki Konuma
IPC分类号： G01R33/483 , G01R33/56 , G01R33/54 , G01R33/565 , G01R33/567 , G01R33/561
摘要： 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.
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公开(公告)号：US10969452B2
公开(公告)日：2021-04-06
申请号：US16391384
申请日：2019-04-23
发明人： Shuhei Nitta , Nobuyasu Ichinose , Hiroshi Takai , Naho Imamura
IPC分类号： G01R33/483 , G01R33/54
摘要： 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.
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4.发明授权公开(公告)号：US11536790B2
公开(公告)日：2022-12-27
申请号：US16720356
申请日：2019-12-19
发明人： Yuichi Yamashita , Kazuto Nakabayashi , Hitoshi Kanazawa , Kazuya Okamoto , Hiroshi Takai , Nobuyuki Konuma , Kensuke Shinoda
摘要： 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.
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公开(公告)号：US11415656B2
公开(公告)日：2022-08-16
申请号：US16774116
申请日：2020-01-28
发明人： Kensuke Shinoda , Kazuto Nakabayashi , Hitoshi Kanazawa , Kazuya Okamoto , Hiroshi Takai , Nobuyuki Konuma , Yuichi Yamashita
摘要： 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.
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公开(公告)号：US11138769B2
公开(公告)日：2021-10-05
申请号：US16409105
申请日：2019-05-10
发明人： Masaaki Nagashima , Hiroshi Takai
IPC分类号： G06T11/00 , G01R33/567 , G01R33/561 , G01R33/48 , G01R33/563
摘要： 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.
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公开(公告)号：US11035922B2
公开(公告)日：2021-06-15
申请号：US16533080
申请日：2019-08-06
发明人： Shuhei Nitta , Naho Imamura , Takahiro Ohmure , Hiroshi Takai , Nobuyasu Ichinose , Yoshimori Kassai
IPC分类号： G01R33/565 , G01R33/561 , G01R33/421 , G01R33/56 , G01R33/563
摘要： According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry calculates a static magnetic field correction amount based on a static magnetic field distribution of a first imaging range narrower than a second imaging range. The processing circuitry collects a magnetic resonance (MR) image of the second imaging range under a static magnetic field which is corrected based on the static magnetic field correction amount. The processing circuitry corrects distortion of the collected MR image.
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公开(公告)号：US10908242B2
公开(公告)日：2021-02-02
申请号：US16391391
申请日：2019-04-23
发明人： Shuhei Nitta , Nobuyasu Ichinose , Hiroshi Takai , Naho Imamura
IPC分类号： G01R33/3875 , G01R33/48 , G01R33/565 , G01R33/483
摘要： A magnetic resonance imaging apparatus includes an interface, processing circuitry, and imaging control circuitry. The interface inputs, to a locator image, a position-indicating region indicating a position in a displayed cross section. The processing circuitry determines a collection direction relating to multi-slice imaging based on a static magnetic field distribution relating to the position-indicating region and the position-indicating region. The imaging control circuitry performs the multi-slice imaging in the collection direction to a plurality of slices in an imaging region which includes at least the position-indicating region.
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