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1.发明授权公开(公告)号：US11940513B2
公开(公告)日：2024-03-26
申请号：US17476459
申请日：2021-09-15
Applicant: Siemens Healthcare GmbH
Inventor： Stephan Biber , Jürgen Nistler , Markus Vester
CPC classification number: G01R33/3692 , G01R33/34038 , G01R33/3614
Abstract: A magnetic resonance tomography unit and a method for operating the magnetic resonance tomography unit are provided. The magnetic resonance tomography unit has a transmission interference suppression device with a transmission interference suppression control system, a sensor, and a transmission interference suppression antenna. The transmission interference suppression device is configured to acquire, with the sensor, an excitation signal of the transmitter, and determine, with the transmission interference suppression control system, a transmission interference suppression signal dependent upon the acquired excitation signal of the transmitter. The transmission interference suppression device is configured to transmit, via the transmission interference suppression antenna, the transmission interference suppression signal, so that at a predetermined location outside the magnetic resonance tomography unit, the excitation signal emitted by the transmitter via the transmitter antenna is attenuated.
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2.发明公开
公开(公告)号：US20230164471A1
公开(公告)日：2023-05-25
申请号：US17993110
申请日：2022-11-23
Applicant: Siemens Healthcare GmbH
Inventor： Ting Qiang Xue , JianMin Wang , Markus Vester
CPC classification number: H04R1/1008 , H04R9/06 , H04R1/1075 , H04R1/08 , G06F3/162 , H04R1/1041 , H04R9/046 , H04R2420/07
Abstract: A magnetic-resonance compatible earphone is provided comprising an earphone body, a diaphragm, and a drive coil. The diaphragm is arranged on the earphone body and configured to generate sound through vibration. The drive coil is arranged on the earphone body and used to receive audio current. The drive coil that has received the audio current is able to generate a Lorentz force under the action of a main magnetic field of a magnetic resonance imaging system. The drive coil is able to drive the diaphragm to vibrate by means of the Lorentz force generated by the drive coil. The magnetic-resonance compatible earphone has good magnetic resonance compatibility. In addition, a magnetic-resonance compatible intercom system and a head coil apparatus comprising the magnetic-resonance compatible earphone are also provided.
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公开(公告)号：US20220137168A1
公开(公告)日：2022-05-05
申请号：US17519563
申请日：2021-11-04
Applicant: Siemens Healthcare GmbH
Inventor： Jürgen Nistler , Markus Vester
IPC: G01R33/422
Abstract: A magnetic resonance tomography system that includes a transmitter for generating an excitation signal and a body coil for emitting the excitation signal, and a method for operation of the magnetic resonance tomography system are provided. The magnetic resonance tomography system has a patient tunnel, in which the body coil is arranged. The magnetic resonance tomography system also has a first transmission interference suppression antenna that is arranged between the body coil and an opening in the patient tunnel. The first transmission interference suppression antenna is configured to provide a spatial transmission characteristic that may be compared with the body coil.
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公开(公告)号：US11307273B2
公开(公告)日：2022-04-19
申请号：US17039278
申请日：2020-09-30
Applicant: Siemens Healthcare GmbH
Inventor： Stephan Biber , Markus Vester
Abstract: A line for an electrical connection in a magnetic resonance tomography apparatus and a magnetic resonance tomography apparatus with a corresponding line are provided. The line includes an electrical interference conductor that may pick up an electromagnetic interference signal from an environment and/or irradiate the electromagnetic interference signal into the environment. The line also includes a sensor that is electrically and/or magnetically coupled to the interference line.
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公开(公告)号：US11193997B2
公开(公告)日：2021-12-07
申请号：US16546296
申请日：2019-08-20
Applicant: Siemens Healthcare GmbH
Inventor： Stephan Biber , Adrian Bampton , Markus Vester , Andre de Oliveira , Volker Model , Jürgen Nistler , Andreas Potthast , Adam Paul Johnstone
IPC: G01R33/3815 , A61B5/055 , G01R33/44 , G01R33/54 , G01R33/36
Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.
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公开(公告)号：US20210255267A1
公开(公告)日：2021-08-19
申请号：US17155595
申请日：2021-01-22
Applicant: Siemens Healthcare GmbH
Inventor： Stephan Biber , Markus Vester
IPC: G01R33/565 , G01R33/36 , G01R33/54 , G01R33/3815
Abstract: The disclosure relates to a magnetic resonance tomography system and to a method for operation of the magnetic resonance tomography system. The magnetic resonance tomography system has a magnetic unit, which is configured to change a homogeneous magnetic field B0 with a magnetic field strength, which may vary between a first predetermined value on exciting nuclear spins and a second predetermined value on receiving magnetic resonance signals, in a measuring volume in a short, predetermined time, controlled by the magnetic resonance tomography system.
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公开(公告)号：US10935615B2
公开(公告)日：2021-03-02
申请号：US16366830
申请日：2019-03-27
Applicant: Siemens Healthcare GmbH , Yale University
Inventor： Markus Vester , Peter Speier , Stefan Popescu , Edgar Mueller , Robert Todd Constable , Gigi Galiana
IPC: G01V3/00 , G01R33/38 , G01R33/383
Abstract: A magnet assembly for magnetic resonance imaging is used to generate the basic magnetic field with a strength needed to produce the steady state or equilibrium position of nuclei or nuclear spins in magnetic resonance imaging. This magnet, or a part thereof, is vibrated or tilted or otherwise periodically moved so as to change its position and thereby generate a time-varying gradient field, which is used to enter the acquired magnetic resonance signals as raw data into k-space.
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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
Applicant: Siemens Healthcare GmbH
Inventor： Stephan Kannengiesser , Robert Rehner , Stefan Popescu , Gudrun Ruyters , Markus Vester
Abstract: 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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9.发明申请
公开(公告)号：US20200096588A1
公开(公告)日：2020-03-26
申请号：US16582444
申请日：2019-09-25
Applicant: Siemens Healthcare GmbH
Inventor： Markus Vester , Mario Zeller
IPC: G01R33/561 , G01R33/58 , G01R33/56
Abstract: Method and system for cleaning a magnetic resonance measurement dataset. In the method, a GRAPPA kernel is calibrated on the measurement dataset, k-space values of the measurement dataset are verified against a predefined intensity criterion in order to identify false values, the k-space values of the measurement dataset are reconstructed point-by-point using the calibrated GRAPPA kernel from respective others of the k-space values, and the false values are replaced with the corresponding reconstructed k-space values in order to generate a cleaned measurement dataset.
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公开(公告)号：US20200064425A1
公开(公告)日：2020-02-27
申请号：US16546296
申请日：2019-08-20
Applicant: Siemens Healthcare GmbH
Inventor： Stephan Biber , Adrian Bampton , Markus Vester , Andre de Oliveira , Volker Model , Jürgen Nistler , Andreas Potthast , Paul Adam Johnstone
IPC: G01R33/3815 , A61B5/055 , G01R33/44
Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.
