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公开(公告)号：US11156689B2
公开(公告)日：2021-10-26
申请号：US16851609
申请日：2020-04-17
发明人： Qiong Zhang , Wei Liu , Nan Xiao
IPC分类号： G01R33/567 , G01R33/54 , A61B5/00 , A61B5/055 , A61B5/113
摘要： The present disclosure related to techniques for extracting a respiratory navigation signal for use in a magnetic resonance imaging system. The extracted respiratory navigation signals accurately represent respiratory motions of a patient.
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2.发明授权公开(公告)号：US11255937B2
公开(公告)日：2022-02-22
申请号：US16858031
申请日：2020-04-24
发明人： Qiong Zhang , Wei Liu , Nan Xiao
IPC分类号： G01R33/48 , G01R33/561
摘要： A k-space data acquisition device and method, and a magnetic resonance imaging device and method. The k-space data acquisition device includes an acquisition trajectory determiner configured to determine an acquisition trajectory of echo signals in a k space in a manner of filling echo data in a pseudo radial order; and a data acquirer configured to acquire k-space data conforming to the acquisition trajectory and fill the k space.
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3.发明申请公开(公告)号：US20200341087A1
公开(公告)日：2020-10-29
申请号：US16858031
申请日：2020-04-24
发明人： Qiong Zhang , Wei Liu , Nan Xiao
IPC分类号： G01R33/48 , G01R33/561
摘要： A k-space data acquisition device and method, and a magnetic resonance imaging device and method. The k-space data acquisition device includes an acquisition trajectory determiner configured to determine an acquisition trajectory of echo signals in a k space in a manner of filling echo data in a pseudo radial order; and a data acquirer configured to acquire k-space data conforming to the acquisition trajectory and fill the k space.
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4.发明申请公开(公告)号：US20200333419A1
公开(公告)日：2020-10-22
申请号：US16851609
申请日：2020-04-17
发明人： Qiong Zhang , Wei Liu , Nan Xiao
IPC分类号： G01R33/567 , G01R33/54 , A61B5/055 , A61B5/00
摘要： The present disclosure related to techniques for extracting a respiratory navigation signal for use in a magnetic resonance imaging system. The extracted respiratory navigation signals accurately represent respiratory motions of a patient.
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公开(公告)号：US20220326329A1
公开(公告)日：2022-10-13
申请号：US17716001
申请日：2022-04-08
发明人： Fang Dong , De He Weng , Nan Xiao
IPC分类号： G01R33/56 , G01R33/48 , G01R33/565 , G06T11/00
摘要： The present disclosure is directed to MRI techniques. The techniques include occupying a central region of a first k-space with full sampling along a Cartesian trajectory, occupying a peripheral region of the first k-space with undersampling along a non-Cartesian trajectory; acquiring sensitivity distribution information of receiving coils; based on a sensitivity distribution chart, merging the Cartesian data of the central region according to multiple channels to obtain a third k-space; based on the sensitivity distribution chart, applying parallel imaging and compressed sensing to the undersampled non-Cartesian trajectory to reconstruct an image, obtaining a second k-space by transformation, and when the second k-space and third k-space are synthesized, using a central region of the second k-space to replace the third k-space of a corresponding region to obtain a k-space suitable for image reconstruction.
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6.发明申请公开(公告)号：US20200337643A1
公开(公告)日：2020-10-29
申请号：US16858264
申请日：2020-04-24
发明人： Nan Xiao , De He Weng , Yan Tu Huang , Qiong Zhang
IPC分类号： A61B5/00 , A61B5/055 , G01R33/565
摘要： In a method for correcting the interference in respiratory navigation, transmitting, during magnetic resonance scanning, a respiratory signal generated by a radio frequency signal generator to a human body; acquiring, as a measured respiratory signal, a respiratory signal passing through the human body and acquired in a local coil, wherein the measured respiratory signal is constituted by a real respiratory signal and an interference signal; determining, according to a respiratory signal coil sensitivity of the real respiratory signal and an interference signal coil sensitivity of the interference signal, a signal relation that is satisfied by the real respiratory signal, the interference signal and the measured respiratory signal; and calculating the signal relation to obtain the real respiratory signal.
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7.发明授权公开(公告)号：US10598749B2
公开(公告)日：2020-03-24
申请号：US15963191
申请日：2018-04-26
IPC分类号： G01R33/483 , G01R33/56 , G01R33/565
摘要： In an RF spoiling method and apparatus for rapid spatial saturation in magnetic resonance imaging, a first RF pulse of a spatial saturation module is applied, and a first set of RF pulses of an imaging sequence is applied after the first RF pulse. A phase of an RF pulse, closest to the first RF pulse in the time dimension, in the first set of RF pulses is not coherent with a phase of the first RF pulse. This makes a phase cycle of the spatial saturation module and a phase cycle of the imaging sequence independent of each other, so the coherence of residual signals in the transverse plane can be destroyed more effectively, thereby reducing artefacts, and improving imaging quality.
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8.发明申请公开(公告)号：US20180313924A1
公开(公告)日：2018-11-01
申请号：US15963191
申请日：2018-04-26
IPC分类号： G01R33/483 , G01R33/56 , G01R33/565
CPC分类号： G01R33/4838 , G01R33/5608 , G01R33/56545
摘要： In an RF spoiling method and apparatus for rapid spatial saturation in magnetic resonance imaging, a first RF pulse of a spatial saturation module is applied, and a first set of RF pulses of an imaging sequence is applied after the first RF pulse. A phase of an RF pulse, closest to the first RF pulse in the time dimension, in the first set of RF pulses is not coherent with a phase of the first RF pulse. This makes a phase cycle of the spatial saturation module and a phase cycle of the imaging sequence independent of each other, so the coherence of residual signals in the transverse plane can be destroyed more effectively, thereby reducing artefacts, and improving imaging quality.
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9.发明授权公开(公告)号：US11369317B2
公开(公告)日：2022-06-28
申请号：US16858264
申请日：2020-04-24
发明人： Nan Xiao , De He Weng , Yan Tu Huang , Qiong Zhang
IPC分类号： A61B5/00 , G01R33/565 , A61B5/055 , A61B5/08
摘要： In a method for correcting the interference in respiratory navigation, transmitting, during magnetic resonance scanning, a respiratory signal generated by a radio frequency signal generator to a human body; acquiring, as a measured respiratory signal, a respiratory signal passing through the human body and acquired in a local coil, wherein the measured respiratory signal is constituted by a real respiratory signal and an interference signal; determining, according to a respiratory signal coil sensitivity of the real respiratory signal and an interference signal coil sensitivity of the interference signal, a signal relation that is satisfied by the real respiratory signal, the interference signal and the measured respiratory signal; and calculating the signal relation to obtain the real respiratory signal.
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公开(公告)号：US10466330B2
公开(公告)日：2019-11-05
申请号：US15797090
申请日：2017-10-30
IPC分类号： G01V3/00 , G01R33/563 , G01R33/48 , G01R33/561
摘要： In a magnetic resonance diffusion weighted imaging method and apparatus, an excitation pulse flips a magnetization intensity vector of nuclear spins, a subject from the Z direction into the X-Y plane; and a diffusion pulse is applied to the magnetization intensity vector flipped into the X-Y plane in order to perform diffusion weighting. A flip pulse is applied to a magnetization intensity vector that does not meet Carr-Purcell-Meiboom-Gill conditions in the X-Y plane after diffusion weighting in order to flip it back to the Z direction. A data acquisition sequence is activated to acquire imaging data from a residual magnetization intensity vector meeting the Carr-Purcell-Meiboom-Gill conditions in the X-Y plane.
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