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公开(公告)号：US11874350B2
公开(公告)日：2024-01-16
申请号：US17216588
申请日：2021-03-29
发明人： Robert Rehner , Helmut Greim
CPC分类号： G01R33/365 , G01R33/34084
摘要： A local coil includes a coil element in the form of a loop. The coil element includes a first conductor, a second conductor, and a third conductor. The coil element includes a first dielectric and a second dielectric. The first dielectric is arranged between the first conductor and the second conductor, and the second dielectric is arranged between the second conductor and the third conductor. The coil element includes a receive unit that includes the first conductor and the second conductor, and a detuning unit that includes the third conductor. In a first operating state of the coil element, the receive unit has a first resonant frequency. In a second operating state of the coil element, the detuning unit is configured to detune the resonant frequency of the receive unit so that the receive unit has a second resonant frequency different than the first resonant frequency.
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公开(公告)号：US20220179019A1
公开(公告)日：2022-06-09
申请号：US17525128
申请日：2021-11-12
发明人： Robert Rehner
摘要： A local coil for magnetic resonance imaging is disclosed herein. The local coil includes an electrical circuit arrangement and a coaxial cable with an internal conductor and an external conductor surrounding the internal conductor. The two ends of the coaxial cable are connected to the electrical circuit arrangement and the internal conductor and the external conductor together form an antenna loop. The internal conductor and/or the external conductor has at least one interruption and the at least one interruption divides the internal conductor and/or the external conductor into at least two separate segments in each case.
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公开(公告)号：US11243277B2
公开(公告)日：2022-02-08
申请号：US16800199
申请日：2020-02-25
摘要： The disclosure relates to a field camera and a method for measuring a magnetic field distribution using a magnetic resonance tomograph and the field camera. The field camera has a number of samples, which are distributed over a spatial volume to be measured, and a number of receive antennas. In an act of the method, a sensitivity matrix for the receive antennas, for each sample at each receive antenna, is captured using the magnetic resonance tomograph. In another act, antenna signals of the samples in a magnetic field to be measured are captured by the receive antennas, using the magnetic resonance tomograph. Finally, magnetic resonance signals of the individual samples are determined from the antenna signals as a function of the sensitivity matrix, using a controller. In a further act, the magnetic field strength at the location of the samples may be determined from the magnetic resonance signals.
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公开(公告)号：US11639977B2
公开(公告)日：2023-05-02
申请号：US17525128
申请日：2021-11-12
发明人： Robert Rehner
摘要： A local coil for magnetic resonance imaging is disclosed herein. The local coil includes an electrical circuit arrangement and a coaxial cable with an internal conductor and an external conductor surrounding the internal conductor. The two ends of the coaxial cable are connected to the electrical circuit arrangement and the internal conductor and the external conductor together form an antenna loop. The internal conductor and/or the external conductor has at least one interruption and the at least one interruption divides the internal conductor and/or the external conductor into at least two separate segments in each case.
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公开(公告)号：US20210302516A1
公开(公告)日：2021-09-30
申请号：US17216588
申请日：2021-03-29
发明人： Robert Rehner , Helmut Greim
摘要： A local coil includes a coil element in the form of a loop. The coil element includes a first conductor, a second conductor, and a third conductor. The coil element includes a first dielectric and a second dielectric. The first dielectric is arranged between the first conductor and the second conductor, and the second dielectric is arranged between the second conductor and the third conductor. The coil element includes a receive unit that includes the first conductor and the second conductor, and a detuning unit that includes the third conductor. In a first operating state of the coil element, the receive unit has a first resonant frequency. In a second operating state of the coil element, the detuning unit is configured to detune the resonant frequency of the receive unit so that the receive unit has a second resonant frequency different than the first resonant frequency.
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6.发明授权公开(公告)号：US11119166B2
公开(公告)日：2021-09-14
申请号：US16476671
申请日：2018-01-11
发明人： Michael Miosga , Robert Rehner , Markus Vester
IPC分类号： G01R33/36 , G01R33/3415
摘要： The invention relates to a local coil matrix and to a magnetic resonance scanner for operation by means of a low magnetic field. The local coil matrix according to the invention has a first coil winding and a second coil winding and a first low-noise pre-amplifier and second pre-amplifier, each electrically connected to a coil winding. The first coil winding has a broadband matching in a first frequency range at a Larmor frequency to the first pre-amplifier connected thereto.
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公开(公告)号：US20190235034A1
公开(公告)日：2019-08-01
申请号：US16259519
申请日：2019-01-28
发明人： Helmut Greim , Robert Rehner , Markus Vester
IPC分类号： G01R33/3415 , G01R33/36 , G01R33/48
摘要： A local coil for a magnetic resonance tomography system is provided. The local coil has a coil winding and a preamplifier connected electrically thereto. The coil winding has a plurality of coil segments that are coupled capacitively to one another.
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公开(公告)号：US11340322B2
公开(公告)日：2022-05-24
申请号：US16677636
申请日：2019-11-07
发明人： Barbara Dornberger , Robert Rehner
IPC分类号： G01R33/36 , G01R33/341 , H01Q1/24 , H01Q7/00
摘要： A local coil for a magnetic resonance tomograph includes a transmitting antenna for emitting a pilot tone, and a receiving antenna for receiving the pilot tone. The local coil also has a decoupling device for decoupling the receiving antenna from the transmitting antenna.
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公开(公告)号：US20200292645A1
公开(公告)日：2020-09-17
申请号：US16800199
申请日：2020-02-25
摘要： The disclosure relates to a field camera and a method for measuring a magnetic field distribution using a magnetic resonance tomograph and the field camera. The field camera has a number of samples, which are distributed over a spatial volume to be measured, and a number of receive antennas. In an act of the method, a sensitivity matrix for the receive antennas, for each sample at each receive antenna, is captured using the magnetic resonance tomograph. In another act, antenna signals of the samples in a magnetic field to be measured are captured by the receive antennas, using the magnetic resonance tomograph. Finally, magnetic resonance signals of the individual samples are determined from the antenna signals as a function of the sensitivity matrix, using a controller. In a further act, the magnetic field strength at the location of the samples may be determined from the magnetic resonance signals.
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10.发明申请公开(公告)号：US20190339344A1
公开(公告)日：2019-11-07
申请号：US16476671
申请日：2018-01-11
发明人： Michael Miosga , Robert Rehner , Markus Vester
IPC分类号： G01R33/36 , G01R33/3415
摘要： The invention relates to a local coil matrix and to a magnetic resonance scanner for operation by means of a low magnetic field. The local coil matrix according to the invention has a first coil winding and a second coil winding and a first low-noise pre-amplifier and second pre-amplifier, each electrically connected to a coil winding. The first coil winding has a broadband matching in a first frequency range at a Larmor frequency to the first pre-amplifier connected thereto.
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