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公开(公告)号：US10324152B2
公开(公告)日：2019-06-18
申请号：US16002458
申请日：2018-06-07
发明人： Xin Zhang , Stephan Anderson , Guangwu Duan , Xiaoguang Zhao
IPC分类号： G01V3/00 , G01R33/56 , G01R33/36 , G01R33/343 , A61B5/055
摘要： A passive apparatus including a plurality of resonators increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Moreover, the apparatus enhances specimen safety by substantially avoiding unwanted generation of an electric field, or an increase in the electric field component of the RF energy. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image.
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公开(公告)号：US12085629B2
公开(公告)日：2024-09-10
申请号：US17545538
申请日：2021-12-08
发明人： Xin Zhang , Stephan Anderson , Xiaoguang Zhao , Guangwu Duan
IPC分类号： G01R33/3415 , G01R33/12 , G01R33/34
CPC分类号： G01R33/3415 , G01R33/12 , G01R33/34038
摘要： A passive MRI enhancing embodiment includes a plurality of resonators and increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image. An isolator embodiment has a nonlinear resonator controllably configurable alternately into an isolation configuration and a transmission configuration, and a second resonator. The nonlinear resonator is coupled to a communications port and is substantially communicatively isolated from the second resonator when the nonlinear resonator is in the isolation configuration, and is communicatively coupled to the second resonator when the nonlinear resonator is in the transmission configuration.
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公开(公告)号：US10947876B2
公开(公告)日：2021-03-16
申请号：US16530662
申请日：2019-08-02
摘要： A bilayer metamaterial silencer allows substantial fluid through the apparatus, while mitigating the propagation of sound through the apparatus, and while providing a form factor that is significantly more compact than previously-known devices. Moreover, illustrative embodiments allow a designer to specify one or both of the frequency or frequencies at which the apparatus mitigates sound propagation, and/or the bandwidth around the frequency or frequencies at which the apparatus mitigates sound propagation.
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公开(公告)号：US11846217B2
公开(公告)日：2023-12-19
申请号：US17112833
申请日：2020-12-04
摘要： A bilayler metamaterial silencer allows substantial fluid through the apparatus, while mitigating the propagation of sound through the apparatus, and while providing a form factor that is significantly more compact than previously-known devices. Moreover, illustrative embodiments allow a designer to specify one or both of the frequency or frequencies at which the apparatus mitigates sound propagation, and/or the bandwidth around the frequency or frequencies at which the apparatus mitigates sound propagation.
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公开(公告)号：US20220095944A1
公开(公告)日：2022-03-31
申请号：US17545538
申请日：2021-12-08
发明人： Xin Zhang , Stephan Anderson , Xiaoguang Zhao , Guangwu Duan
IPC分类号： A61B5/055 , G01R33/3415 , G01R33/34 , G01R33/12
摘要： A passive MRI enhancing embodiment includes a plurality of resonators and increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image. An isolator embodiment has a nonlinear resonator controllably configurable alternately into an isolation configuration and a transmission configuration, and a second resonator. The nonlinear resonator is coupled to a communications port and is substantially communicatively isolated from the second resonator when the nonlinear resonator is in the isolation configuration, and is communicatively coupled to the second resonator when the nonlinear resonator is in the transmission configuration.
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公开(公告)号：US20210087957A1
公开(公告)日：2021-03-25
申请号：US17112833
申请日：2020-12-04
摘要： A bilayler metamaterial silencer allows substantial fluid through the apparatus, while mitigating the propagation of sound through the apparatus, and while providing a form factor that is significantly more compact than previously-known devices. Moreover, illustrative embodiments allow a designer to specify one or both of the frequency or frequencies at which the apparatus mitigates sound propagation, and/or the bandwidth around the frequency or frequencies at which the apparatus mitigates sound propagation.
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公开(公告)号：US10884089B2
公开(公告)日：2021-01-05
申请号：US16443126
申请日：2019-06-17
申请人： Boston University
发明人： Xin Zhang , Stephan Anderson , Guangwu Duan , Xiaoguang Zhao
IPC分类号： G01R33/56 , G01R33/36 , G01R33/343 , A61B5/055 , G01R33/3415
摘要： A passive apparatus including a plurality of resonators increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Moreover, the apparatus enhances specimen safety by substantially avoiding unwanted generation of an electric field, or an increase in the electric field component of the RF energy. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image.
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公开(公告)号：US20200043456A1
公开(公告)日：2020-02-06
申请号：US16530662
申请日：2019-08-02
申请人： Boston University
IPC分类号： G10K11/162
摘要： A bilayler metamaterial silencer allows substantial fluid through the apparatus, while mitigating the propagation of sound through the apparatus, and while providing a form factor that is significantly more compact than previously-known devices. Moreover, illustrative embodiments allow a designer to specify one or both of the frequency or frequencies at which the apparatus mitigates sound propagation, and/or the bandwidth around the frequency or frequencies at which the apparatus mitigates sound propagation.
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公开(公告)号：US20190302209A1
公开(公告)日：2019-10-03
申请号：US16443126
申请日：2019-06-17
申请人： Boston University
发明人： Xin Zhang , Stephan Anderson , Guangwu Duan , Xiaoguang Zhao
IPC分类号： G01R33/56 , A61B5/055 , G01R33/343 , G01R33/3415 , G01R33/36
摘要： A passive apparatus including a plurality of resonators increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Moreover, the apparatus enhances specimen safety by substantially avoiding unwanted generation of an electric field, or an increase in the electric field component of the RF energy. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image.
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公开(公告)号：US20180356483A1
公开(公告)日：2018-12-13
申请号：US16002458
申请日：2018-06-07
发明人： Xin Zhang , Stephan Anderson , Guangwu Duan , Xiaoguang Zhao
IPC分类号： G01R33/56 , A61B5/055 , G01R33/343 , G01R33/36
CPC分类号： G01R33/5608 , A61B5/055 , G01R33/343 , G01R33/3628
摘要： A passive apparatus including a plurality of resonators increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Moreover, the apparatus enhances specimen safety by substantially avoiding unwanted generation of an electric field, or an increase in the electric field component of the RF energy. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image.
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