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公开(公告)号：US20230003819A1
公开(公告)日：2023-01-05
申请号：US17848561
申请日：2022-06-24
发明人： Dominik Paul , Mario Zeller , Kun Zhou
IPC分类号： G01R33/56 , G01R33/561
摘要： Techniques are disclosed for use in magnetic resonance imaging (MRI) for exciting spins of a first material and spins of a second material. A first spin echo signal is acquired when the excited spins include a first phase difference, which is given by Δ, and a second spin echo signal is acquired when the excited spins of the first material and the excited spins of the second material include a second phase difference, which is given by −Δ. An absolute value of Δ lies within the interval ]0,π[. 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 first spin echo signal and the second spin echo signal.
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公开(公告)号：US20220397623A1
公开(公告)日：2022-12-15
申请号：US17836048
申请日：2022-06-09
发明人： Dominik Paul , Hans-Peter Fautz , Mario Zeller , David Grodzki , Hannah Hale
IPC分类号： G01R33/54 , G01R33/565 , G01R33/56
摘要： In a computer-implemented method for setting a field of view for a magnetic resonance scan, exclusion information describing a region of the original field of view that is unmapped owing to the distortion is ascertained on the basis of the distortion map for at least one first set of field-of-view parameters describing a rectangular or cuboidal original field of view, the exclusion information is used to determine a second set of field-of-view parameters to be used for the magnetic resonance scan, and the magnetic resonance scan is performed using the second set of field-of-view parameters.
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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.
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公开(公告)号：US11226388B2
公开(公告)日：2022-01-18
申请号：US16713412
申请日：2019-12-13
发明人： Flavio Carinci , Dominik Paul , Mario Zeller
IPC分类号： G01R33/561
摘要： In a method for detecting MR signals of an object in an MR scanner, in which the MR signals of the object are detected with receiving channels at the same time using a parallel imaging technique, where the MR signals are spin-echoes generated with a spin-echo based imaging sequence, a first magnetic field gradient (MFG) is applied in a slice selection direction (SSD) while applying an RF excitation pulse of the spin echo based imaging sequence, the first MFG having a first polarity during the application of the RF excitation pulse, a second MFG is applied in the SSD while applying at least a first RF refocusing pulse of the spin echo based imaging sequence, the second magnetic field gradient has a second polarity opposite to the first polarity, and the MR signals of the spin echo are detected to generate an MR image based on the detected MR signals.
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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.
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公开(公告)号：US11016158B2
公开(公告)日：2021-05-25
申请号：US16208871
申请日：2018-12-04
发明人： Dominik Paul , Mario Zeller
摘要： The disclosure relates to the automatic determination of correction factor values for producing MR images using a magnetic resonance system. A plurality of MR images is produced, wherein each MR image is produced using parameters with parameter values and using correction factors with correction factor values. In order to produce the MR images, MR data of the same examination object is acquired under the same external boundary conditions. The MR images are evaluated automatically in respect of artifacts in the respective MR image, in order to determine the MR image with the least artifacts among the MR images. The correction factor values are determined as those correction factor values which have been used to produce the MR image with the least artifacts. The parameters determine a sequence, with which the MR data is acquired for producing the MR images. The correction factors reduce influences which influence the acquisition of the MR data.
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公开(公告)号：US20210149006A1
公开(公告)日：2021-05-20
申请号：US16950895
申请日：2020-11-17
IPC分类号： G01R33/565 , G01R33/56 , G01R33/561
摘要： A method for acquiring a magnetic resonance data set of an object under examination by a magnetic resonance system using a scan sequence is provided. The scan sequence includes a succession of sequence blocks, and in each sequence block, there is at least one sub-block including an excitation section and/or a detection section. An excitation section includes at least one excitation pulse, and in a detection section, an echo signal or an echo train is acquired as a scan signal. At least one item of motion information is provided for each sub-block. The motion information contains information about a movement of the object under examination within a duration of the sub-block. Some of the sub-blocks are automatically repeated. At least the sub-blocks having motion information that exceeds a threshold value are repeated. The threshold value defines a motion amplitude.
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公开(公告)号：US20210123995A1
公开(公告)日：2021-04-29
申请号：US17075917
申请日：2020-10-21
发明人： Dominik Paul
摘要： A system and method for performing a measuring sequence by a magnetic resonance device for examining a patient is provided. The performance of the measuring sequence includes a processing of segments. If at least one determined patient load value exceeds a predetermined limit value, the processing of the measuring sequence for the time frame of exceeding the patient load value is interrupted. The determination of the at least one patient load value includes a detection of a movement of a patient into a changed pose, an adjustment of at least one following segment to the changed pose of the patient, and a determination of at least one patient load value for the adjusted at least one following segment.
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公开(公告)号：US20200371180A1
公开(公告)日：2020-11-26
申请号：US16880297
申请日：2020-05-21
发明人： Flavio Carinci , Dominik Paul , Mario Zeller
IPC分类号： G01R33/483 , G01R33/561 , G01R33/54
摘要： Techniques are disclosed for recording magnetic resonance data of an examination object with a magnetic resonance device. A magnetic resonance sequence is used to record the magnetic resonance data from at least two slices of a slice stack, and at least two temporally separate radio frequency pulses are output within an excitation time frame. A slice thickness of the slices, which is increased by an enlargement factor that is greater than one compared with a nominal slice thickness, is used for at least one, but not all, of the radio frequency pulses. The enlargement factor is selected as a function of a distance value describing the distance between two adjacent slices of the slice stack, such that the increased slice thickness does not result in the resulting excitation region of a slice extending into the adjacent slice.
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10.发明授权公开(公告)号：US10823802B2
公开(公告)日：2020-11-03
申请号：US16294350
申请日：2019-03-06
发明人： Dominik Paul , Mario Zeller
IPC分类号： G01V3/00 , G01R33/54 , G01R33/483 , G01R33/56 , G01R33/561 , G01R33/563
摘要： In a method and computer for creating a pulse sequence for controlling a magnetic resonance (MR) tomography system to generate image data, raw MR data are acquired by exciting different transverse magnetizations in a number of sub-volumes of the subject, with a sequence of pulse iterations being executed that each prepare, excite and read out sub-volumes. The pulse iterations are designed so that a readout occurs when the pulse sequence is applied between a preparation of two spatially directly adjacent sub-volumes.
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