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公开(公告)号：US20220183630A1
公开(公告)日：2022-06-16
申请号：US17643047
申请日：2021-12-07
发明人： Ryuichi Nanaumi , Kazuya Okamoto , Takafumi Ohishi
IPC分类号： A61B5/00 , A61B5/055 , G01R33/567
摘要： A subject information acquisition apparatus, comprises: a signal generation unit configured to generate a high-frequency signal corresponding to each of the frequencies; an acquisition unit configured to acquire a plurality of detection signals based on at least one of a reflection signal and a transmission signal; a signal selection unit configured to select at least one detection signal from the plurality of detection signals based on an index value of the plurality of detection signals; a coupling amount detecting unit configured to detect a coupling amount of near-field coupling due to an electric field between the antenna and the subject based on a detection signal; and a displacement detecting unit configured to generate a displacement signal indicating a displacement of the subject based on the coupling amount.
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公开(公告)号：US11035917B2
公开(公告)日：2021-06-15
申请号：US16200075
申请日：2018-11-26
发明人： Kazuya Okamoto
IPC分类号： G01R33/36
摘要： According to one embodiment, an MRI apparatus includes a power transmitting unit a signal receiving unit and an image reconstruction unit. The power transmitting unit wirelessly transmits electric power to an RF coil device by magnetically coupled resonant type wireless power transfer. The signal receiving unit wirelessly receives a digitized nuclear magnetic resonance signal wirelessly transmitted from the RF coil device. The image reconstruction unit obtains a nuclear magnetic resonance signal received by the signal receiving unit, and reconstructs image data of an object on the basis of the nuclear magnetic resonance signal.
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公开(公告)号：US10884082B2
公开(公告)日：2021-01-05
申请号：US16451059
申请日：2019-06-25
发明人： Kazuya Okamoto
IPC分类号： G01R33/36 , G01R33/3415
摘要： A magnetic resonance imaging apparatus according to an embodiment includes a receiver array coil structured with a plurality of receiver coils. Each of the receiver coils included in the receiver array coil includes a coil element, a first tuning element configured to tune a tunable frequency of the receiver coil to a desired frequency, and a series circuit including a switching element and a second tuning element and being connected in parallel with the first tuning element. The switching element is configured to disconnect the first tuning element and the second tuning element from each other at the time of transmitting and is configured to arrange the first tuning element and the second tuning element to be electrically conductive with each other at the time of receiving. At least two receiver coils positioned adjacent to each other among the plurality of receiver coils are decoupled from each other.
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公开(公告)号：US11035923B2
公开(公告)日：2021-06-15
申请号：US16686264
申请日：2019-11-18
发明人： Kazuya Okamoto
IPC分类号： G01R33/567
摘要： A magnetic resonance imaging apparatus according to an embodiment includes a monitoring coil, a measuring device, and processing circuitry. The monitoring coil continuously transmits to a subject an electromagnetic wave having a monitoring frequency, and without touching the subject. The measuring device measures a change in the impedance related to the monitoring coil over time to thereby generate a biosignal of the subject. The processing circuitry is configured to determine the monitoring frequency that is higher than a frequency of a high-frequency magnetic field based on the information of the subject, and to controls a sequence related to the imaging based on the biosignal.
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5.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：US11307275B2
公开(公告)日：2022-04-19
申请号：US16123545
申请日：2018-09-06
发明人： Kazuya Okamoto
IPC分类号： G01R33/36 , G01R33/34 , G01R33/3415
摘要： An array coil according to an embodiment includes a plurality of element coils, a first electrically-insulative coupler, and a second electrically-insulative coupler. Each of the plurality of element coils has a first fixation point and a second fixation point. The plurality of element coils are two-dimensionally arrayed in a first direction and a second direction while overlapping one another. The first electrically-insulative coupler is configured to couple together two or more of the first fixation points in the first direction. The second electrically-insulative coupler is configured to couple together two or more of the second fixation points in the first direction.
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公开(公告)号：US20190094318A1
公开(公告)日：2019-03-28
申请号：US16200075
申请日：2018-11-26
发明人： Kazuya Okamoto
IPC分类号： G01R33/36
摘要： According to one embodiment, an MRI apparatus includes a power transmitting unit a signal receiving unit and an image reconstruction unit. The power transmitting unit wirelessly transmits electric power to an RF coil device by magnetically coupled resonant type wireless power transfer. The signal receiving unit wirelessly receives a digitized nuclear magnetic resonance signal wirelessly transmitted from the RF coil device. The image reconstruction unit obtains a nuclear magnetic resonance signal received by the signal receiving unit, and reconstructs image data of an object on the basis of the nuclear magnetic resonance signal.
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