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公开(公告)号：US20240201301A1
公开(公告)日：2024-06-20
申请号：US18524979
申请日：2023-11-30
发明人： Dominik Paul , Mario Zeller , Flavio Carinci , Carsten Prinz , Max Müller
IPC分类号： G01R33/54
CPC分类号： G01R33/543
摘要： A method for parameterizing a gradient performance of a magnetic resonance imaging system using an electronic computing facility of the magnetic resonance imaging system includes specifying a first limit value for the gradient performance in dependence on potential nerve stimulation of a patient, and specifying a second limit value for the gradient performance in dependence on potential cardiac muscle stimulation of the patient. The method also includes parameterizing a maximum gradient amplitude of a pulse of the gradient performance and a slew rate of the pulse in dependence on the first limit value and the second limit value.
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公开(公告)号：US20240151795A1
公开(公告)日：2024-05-09
申请号：US18499808
申请日：2023-11-01
发明人： David Grodzki , Dominik Paul
IPC分类号： G01R33/54
CPC分类号： G01R33/543
摘要： A method for calculating an operating parameter of a magnetic resonance sequence, a magnetic resonance apparatus, and a computer program product are disclosed. According to the method, at least one initial sequence parameter of a radio-frequency (RF) transmit pulse of the magnetic resonance sequence is provided. In addition, at least one test RF transmit pulse is determined, (e.g., calculated and/or modeled and/or simulated), wherein the at least one test RF transmit pulse is adapted based on the at least one initial sequence parameter to a specified, in particular geometric, standard shape. The at least one operating parameter is determined, (e.g., calculated), with the assistance of the at least one test RF transmit pulse. It is in particular assumed in this respect that the at least one test RF transmit pulse is applied on performance of the magnetic resonance sequence.
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3.发明公开公开(公告)号：US20240103110A1
公开(公告)日：2024-03-28
申请号：US18370872
申请日：2023-09-20
发明人： Flavio Carinci , Dominik Paul
CPC分类号： G01R33/543 , G01R33/3614
摘要： A method for operating a magnetic resonance apparatus, a magnetic resonance apparatus, and a computer program product are provided. According to the method, an initial MR scan protocol is provided. At least one boundary condition, such as a performance-limiting boundary condition, that is dependent on the patient and/or the MR apparatus is provided. Based on the initial MR scan protocol, at least two sub-protocols are generated. Each of the at least two sub-protocols is checked as to whether the at least one boundary condition is complied with when the respective sub-protocol is applied.
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公开(公告)号：US11604240B2
公开(公告)日：2023-03-14
申请号：US17383506
申请日：2021-07-23
发明人： Adam Kettinger , Dominik Paul , Mario Zeller
IPC分类号： G01V3/00 , G01R33/48 , G01R33/565 , G01R33/54
摘要： In a method for recording measurement data, frequency-dependent parameters characterizing a gradient unit are loaded, a k-space trajectory planned for a MR measurement and having at least one frequency component is loaded, MR measurement data is acquired based on the planned k-space trajectory and reconstructing image data from the MR measurement data, wherein the planned k-space trajectory is corrected based on the at least one frequency component of the planned k-space trajectory and the frequency-dependent parameters, and an electronic signal representing the reconstructed image data is provided as an output of the MR system. The reconstructed image data may be stored and/or displayed. Advantageously, the correction can be employed flexibly for k-space trajectories with different frequency components.
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公开(公告)号：US11585884B2
公开(公告)日：2023-02-21
申请号：US17393521
申请日：2021-08-04
发明人： Manuel Stich , Dominik Paul , Mario Zeller , Nadine Dispenza
IPC分类号： G01R33/565 , G01R33/48 , G01R33/56
摘要： A correction method for reducing temperature-related deviations in a gradient response of an MR pulse sequence in MR imaging is provided. An MR pulse sequence that includes at least one nominal test gradient is run. A gradient response to the at least one nominal test gradient is repeatedly acquired by a magnetic field measurement in an examination region. A gradient system transfer function is determined based on the gradient response. A corrected MR pulse sequence is determined based on the gradient system transfer function and of the at least one nominal test gradient.
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公开(公告)号：US20220400970A1
公开(公告)日：2022-12-22
申请号：US17840792
申请日：2022-06-15
发明人： Flavio Carinci , Mario Zeller , Dominik Paul
IPC分类号： A61B5/055 , G01R33/483
摘要： Method for operating an MR device to acquire MR data slices, wherein in a sequence section of an MR sequence, MR signals of at least two slices are measured simultaneously, and an acquisition order having an association of slices to respective sequence sections of a repetition sequence covering all slices of an associated concatenation is determined using an ordering rule. A crosstalk criterion is evaluated for the acquisition order by checking whether a first slice acquired in a last sequence section of the repetition sequence is directly adjacent to a second slice acquired in a first sequence section of the same repetition sequence. If the crosstalk criterion is fulfilled, the acquisition order is adapted according to an adaptation rule such that a larger temporal acquisition distance between the acquisition of the first and the second slices is provided.
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公开(公告)号：US20220155397A1
公开(公告)日：2022-05-19
申请号：US17528276
申请日：2021-11-17
发明人： Dominik Paul , Mario Zeller , Flavio Carinci
IPC分类号： G01R33/54 , G01R33/58 , G01R33/385
摘要： Techniques are described for acquiring MR data comprising first MR data and second MR data of an examination object using an MR control sequence and a magnetic resonance device comprising an amplifier unit and an analog-to-digital converter (ADC).
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公开(公告)号：US20220026513A1
公开(公告)日：2022-01-27
申请号：US17383506
申请日：2021-07-23
发明人： Adam Kettinger , Dominik Paul , Mario Zeller
IPC分类号： G01R33/48 , G01R33/54 , G01R33/565
摘要： In a method for recording measurement data, frequency-dependent parameters characterizing a gradient unit are loaded, a k-space trajectory planned for a MR measurement and having at least one frequency component is loaded, MR measurement data is acquired based on the planned k-space trajectory and reconstructing image data from the MR measurement data, wherein the planned k-space trajectory is corrected based on the at least one frequency component of the planned k-space trajectory and the frequency-dependent parameters, and an electronic signal representing the reconstructed image data is provided as an output of the MR system. The reconstructed image data may be stored and/or displayed. Advantageously, the correction can be employed flexibly for k-space trajectories with different frequency components.
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公开(公告)号：US11231477B2
公开(公告)日：2022-01-25
申请号：US16520509
申请日：2019-07-24
发明人： Christoph Forman , Dominik Paul , Flavio Carinci
IPC分类号： G01R33/561 , G01R33/48 , G01R33/56
摘要： Techniques are disclosed relating to the generation of a magnetic resonance (MR) image of a predetermined portion of a volume of an examination object. MR data of the portion may be acquired using echo trains in a first step and in a second step, with each of the echo trains acquiring MR data of a plurality of k-space lines. The plurality of k-space lines extend parallel to one another and perpendicular to a common plane such that per k-space line, one intersection point within a plane results. The MR image is then reconstructed using the acquired MR data.
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公开(公告)号：US11016157B2
公开(公告)日：2021-05-25
申请号：US16515444
申请日：2019-07-18
发明人： Dominik Paul , Flavio Carinci , Mario Zeller
IPC分类号： G01R33/483 , A61B5/055 , G01R33/36 , G01R33/561 , G01R33/565 , G06T11/00 , G01R33/385
摘要： A method and system for suppressing metal artifacts in magnetic resonance (MR) images of slices of a patient containing a metallic implant. The method and system can use a Slice Encoding for Metal Artifact Correction (SEMAC) sequence. In the method and system, MR data of each slice is fully sampled in k-space in a reference region located in a center of k-space in a phase-encoding direction and a central section in a slice-selection direction. The MR-data of each slice outside the reference region can be undersampled in k-space. The fully sampled MR data from the reference regions of each slice can be combined to generate a reference data set for reconstructing an MR image of each slice.
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