-
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.
-
公开(公告)号：US11719779B2
公开(公告)日：2023-08-08
申请号：US17662280
申请日：2022-05-06
IPC分类号： G01R33/56 , G01R33/48 , G01R33/567
CPC分类号： G01R33/5608 , G01R33/4818 , G01R33/5676
摘要： An adaptive reconstruction of MR data, including acquired MR data of a core region having core segments and simulated MR data of a peripheral region. The method includes ascertaining a peripheral signal based on the MR data of the peripheral region, determining a scaling factor for each core segment by taking into account the peripheral signal and a mean signal intensity of the MR data for the respective core segment, scaling the MR data of the core region by taking into account the MR data of each core segment and that of the scaling factor corresponding to the respective core segment, generating filtered MR data by combining the scaled MR data of the core region with the MR data of the peripheral region, and reconstructing image data from the filtered MR data.
-
公开(公告)号：US20220357414A1
公开(公告)日：2022-11-10
申请号：US17662280
申请日：2022-05-06
IPC分类号： G01R33/56 , G01R33/567 , G01R33/48
摘要： An adaptive reconstruction of MR data, including acquired MR data of a core region having core segments and simulated MR data of a peripheral region. The method includes ascertaining a peripheral signal based on the MR data of the peripheral region, determining a scaling factor for each core segment by taking into account the peripheral signal and a mean signal intensity of the MR data for the respective core segment, scaling the MR data of the core region by taking into account the MR data of each core segment and that of the scaling factor corresponding to the respective core segment, generating filtered MR data by combining the scaled MR data of the core region with the MR data of the peripheral region, and reconstructing image data from the filtered MR data.
-
公开(公告)号：US20210223342A1
公开(公告)日：2021-07-22
申请号：US17149040
申请日：2021-01-14
发明人： Nadine Dispenza , Dominik Paul , Manuel Stich , Mario Zeller
摘要： In a method for MRI of an object, spins of a first material and spins of a second material are excited. An in-phase echo signal is acquired when the spins are in-phase and an out-of-phase echo signal is acquired, when the spins are out of phase. A first image for the first material and/or a second image for the second material is generated by a computing unit depending on the in-phase echo signal and the out-of-phase echo signal. For acquiring the out-of-phase echo signal, a momentum space is sampled asymmetrically in a read-out direction.
-
5.发明公开公开(公告)号：US20230194639A1
公开(公告)日：2023-06-22
申请号：US17552900
申请日：2021-12-16
发明人： Thorsten Feiweier , Mario Zeller , Bryan Clifford , Zahra Hosseini , Adam Kettinger , Simon Bauer , Nadine Dispenza
IPC分类号： G01R33/54 , G01R33/42 , G01R33/58 , G01R33/561
CPC分类号： G01R33/543 , G01R33/42 , G01R33/583 , G01R33/5613
摘要： The invention relates to a method for acquiring a magnetic resonance image dataset of a subject, a magnetic resonance imaging system and a non-transitory computer-readable medium. The method comprises the steps:
(a) determining scan conditions relating to an imaging protocol which is to be carried out on the subject;
(b) based on the scan conditions and/or on predetermined reference parameters, determining whether at least one imaging preparation procedure may be omitted or accelerated to have a shortened duration;
(c) depending on the determination of step (b), omitting or carrying out the least one imaging preparation procedure at the standard or at the shortened duration;
(d) carrying out the imaging protocol in order to acquire the magnetic resonance image dataset.-
公开(公告)号：US11474179B2
公开(公告)日：2022-10-18
申请号：US17149040
申请日：2021-01-14
发明人： Nadine Dispenza , Dominik Paul , Manuel Stich , Mario Zeller
摘要： In a method for MRI of an object, spins of a first material and spins of a second material are excited. An in-phase echo signal is acquired when the spins are in-phase and an out-of-phase echo signal is acquired, when the spins are out of phase. A first image for the first material and/or a second image for the second material is generated by a computing unit depending on the in-phase echo signal and the out-of-phase echo signal. For acquiring the out-of-phase echo signal, a momentum space is sampled asymmetrically in a read-out direction.
-
公开(公告)号：US20220099777A1
公开(公告)日：2022-03-31
申请号：US17485883
申请日：2021-09-27
发明人： Nadine Dispenza , Dominik Paul , Mario Zeller
IPC分类号： G01R33/561 , G01R33/565 , G01R33/54
摘要： A method a for acquiring magnetic resonance data of an object under examination by means of a magnetic resonance system comprises: in an excitation phase, applying an RF excitation pulse; in a wait phase following the excitation phase, applying at least one first RF refocusing pulse after the applied RF excitation pulse according to a first echo spacing; in an acquisition phase following the wait phase, applying at least two further RF refocusing pulses to generate echo signals according to a second echo spacing, wherein the second echo spacing is smaller than the first echo spacing; and reading out the echo signals generated in the acquisition phase as magnetic resonance data from which image data can be reconstructed, wherein in the wait phase at least two spoiler gradients are switched in the readout direction.
-
公开(公告)号：US11963754B2
公开(公告)日：2024-04-23
申请号：US17038810
申请日：2020-09-30
发明人： Nadine Dispenza , Ralf Kartaeusch , Dominik Paul , Manuel Stich , Mario Zeller
CPC分类号： A61B5/062 , G01R33/5608 , G06T7/0012 , G06T2207/10088
摘要： Accelerated acquisition of scan data by means of magnetic resonance to enable short echo times so that scan data of substances can also be acquired with a transversal relaxation time.
-
公开(公告)号：US11880914B2
公开(公告)日：2024-01-23
申请号：US17240069
申请日：2021-04-26
发明人： Nadine Dispenza , Dominik Paul , Mario Zeller
IPC分类号： G06T11/00 , G01R33/565 , G01R33/56
CPC分类号： G06T11/005 , G01R33/5608 , G01R33/56509 , G06T2210/41
摘要： A method serves for MR-based reconstruction of images of a patient. Whether a value of a movement of the patient in at least one motion direction during an MR scan exceeds a respective threshold value is monitored. If this is not the case, an image reconstruction is performed by a Wave-CAIPI method on the basis of identical calibrated PSF subfunctions for all k-space lines. When this is the case, a number of bins are provided that correspond to sequential value ranges of the patient movement in at least one motion direction, the k-space lines are assigned to the bins based on a movement value determined during their respective acquisition, a calibration of PSF subfunctions is performed for at least two bins on the basis of the k-space lines assigned to said bins, and an image reconstruction is performed by a Wave-CAIPI method in such a way that the PSF subfunctions associated with the assigned bins are used for the respective k-space lines.
-
公开(公告)号：US11733336B2
公开(公告)日：2023-08-22
申请号：US17485883
申请日：2021-09-27
发明人： Nadine Dispenza , Dominik Paul , Mario Zeller
IPC分类号： G01V3/00 , G01R33/561 , G01R33/54 , G01R33/565
CPC分类号： G01R33/5617 , G01R33/543 , G01R33/56554
摘要： A method a for acquiring magnetic resonance data of an object under examination by means of a magnetic resonance system comprises: in an excitation phase, applying an RF excitation pulse; in a wait phase following the excitation phase, applying at least one first RF refocusing pulse after the applied RF excitation pulse according to a first echo spacing; in an acquisition phase following the wait phase, applying at least two further RF refocusing pulses to generate echo signals according to a second echo spacing, wherein the second echo spacing is smaller than the first echo spacing; and reading out the echo signals generated in the acquisition phase as magnetic resonance data from which image data can be reconstructed, wherein in the wait phase at least two spoiler gradients are switched in the readout direction.
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.013 秒)
