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公开(公告)号：US10649055B2
公开(公告)日：2020-05-12
申请号：US15415122
申请日：2017-01-25
IPC分类号： G01R33/563 , G01R33/56 , G01R33/483 , G01R33/54 , G01R33/565
摘要： In diffusion-weighted magnetic resonance imaging, diffusion-encoded gradient pulses with an amplitude and a duration are activated. The amplitude and the duration of the gradient pulses are varied for various excitations of nuclear magnetization. The echo time for the various excitations of nuclear magnetization can be changed.
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2.发明授权公开(公告)号：US10310040B2
公开(公告)日：2019-06-04
申请号：US15221635
申请日：2016-07-28
IPC分类号： G01R33/56 , G01R33/483 , G01R33/561
摘要： In a magnetic resonance apparatus and method for acquiring magnetic resonance data, a magnetic resonance data acquisition scanner executes a turbo spin echo (TSE) data acquisition sequence with simultaneous multi-slice (SMS) imaging wherein nuclear spins in two different slices of an examination subject are simultaneously excited so as to produce respective echo trains. The magnetic resonance data acquisition scanner is operated with the SMS imaging configured so that magnetic resonance signals from the respective slices have a different contrast, with the SMS being configured to allow evolution of magnetization of the nuclear spins for the second contrast while magnetic resonance signals with the first contrast are being detected. The respective magnetic resonance signals from the two different slices are detected and entered into an electronic memory organized as k-space, as k-space data.
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3.发明申请公开(公告)号：US20170293010A1
公开(公告)日：2017-10-12
申请号：US15093164
申请日：2016-04-07
IPC分类号： G01R33/561 , A61B5/00 , A61B5/055 , G01R33/54 , G01R33/36
CPC分类号： G01R33/5611 , A61B5/0042 , A61B5/055 , A61B2560/0223 , G01R33/4835
摘要： In a method and apparatus for acquiring magnetic resonance (MR) raw data with a simultaneous multi-slice (SMS) data acquisition sequence, nuclear spins respectively in multiple slices of the examination subject are simultaneously excited by radiating, from a radio-frequency (RF) radiator of the MR data acquisition scanner, a multi-band (MB) RF pulse. This MB RF pulse in the SMS data acquisition sequence is generated by radiating and superimposing a number of single band (SB) RF pulses emitted from said RF radiator, each having a respectively different flip angle. Raw MR data are acquired from the multiple slices of the examination subject after the simultaneous excitation of nuclear spins in the multiple slices with said MB RF pulse.
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公开(公告)号：US10274568B2
公开(公告)日：2019-04-30
申请号：US15093164
申请日：2016-04-07
IPC分类号： G01R33/48 , G01R33/50 , G01R33/561 , A61B5/055 , A61B5/00 , G01R33/483
摘要： In a method and apparatus for acquiring magnetic resonance (MR) raw data with a simultaneous multi-slice (SMS) data acquisition sequence, nuclear spins respectively in multiple slices of the examination subject are simultaneously excited by radiating, from a radio-frequency (RF) radiator of the MR data acquisition scanner, a multi-band (MB) RF pulse. This MB RF pulse in the SMS data acquisition sequence is generated by radiating and superimposing a number of single band (SB) RF pulses emitted from said RF radiator, each having a respectively different flip angle. Raw MR data are acquired from the multiple slices of the examination subject after the simultaneous excitation of nuclear spins in the multiple slices with said MB RF pulse.
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5.发明申请公开(公告)号：US20180031659A1
公开(公告)日：2018-02-01
申请号：US15221635
申请日：2016-07-28
IPC分类号： G01R33/56 , G01R33/385 , G01R33/48 , G01R33/561
CPC分类号： G01R33/5602 , G01R33/4835 , G01R33/5611 , G01R33/5617
摘要： In a magnetic resonance apparatus and method for acquiring magnetic resonance data, a magnetic resonance data acquisition scanner executes a turbo spin echo (TSE) data acquisition sequence with simultaneous multi-slice (SMS) imaging wherein nuclear spins in two different slices of an examination subject are simultaneously excited so as to produce respective echo trains. The magnetic resonance data acquisition scanner is operated with the SMS imaging configured so that magnetic resonance signals from the respective slices have a different contrast, with the SMS being configured to allow evolution of magnetization of the nuclear spins for the second contrast while magnetic resonance signals with the first contrast are being detected. The respective magnetic resonance signals from the two different slices are detected and entered into an electronic memory organized as k-space, as k-space data.
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6.发明申请公开(公告)号：US20170108567A1
公开(公告)日：2017-04-20
申请号：US15262799
申请日：2016-09-12
IPC分类号： G01R33/56 , G01R33/483 , G01R33/561 , G01R33/48
CPC分类号： G01R33/5602 , G01R33/4835 , G01R33/50 , G01R33/5611 , G01R33/5617
摘要： A magnetic resonance (MR) method and apparatus use simultaneous multislice imaging, with different excitations being effective for different slices in respective iterations of a single scanning sequence, in order to acquire raw MR data from different multiple slices, with respectively different contrasts, in the single scanning sequence. Single band excitation of a first slice among the multiple slices takes place in a first iteration of the single scanning sequence, with multi-band excitation then occurring for all of the multiple slices. Raw data are then acquired from the first slice, and at least one other slice among the multiple slices, that respectively exhibit different contrasts due to only the first slice being affected by the single band excitation. In a second iteration of the single scanning sequence, another slice is excited with single band excitation, and the first slice is among the multiple slices excited with multi-band excitation. Raw data are then acquired from the first slice and at least one other slice among the multiple slices that have the respective contrasts swapped in comparison to the first iteration.
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公开(公告)号：US10261153B2
公开(公告)日：2019-04-16
申请号：US15262799
申请日：2016-09-12
IPC分类号： G01V3/00 , G01R33/56 , G01R33/483 , G01R33/50 , G01R33/561
摘要： A magnetic resonance (MR) method and apparatus use simultaneous multislice imaging, with different excitations being effective for different slices in respective iterations of a single scanning sequence, in order to acquire raw MR data from different multiple slices, with respectively different contrasts, in the single scanning sequence. Single band excitation of a first slice among the multiple slices takes place in a first iteration of the single scanning sequence, with multi-band excitation then occurring for all of the multiple slices. Raw data are then acquired from the first slice, and at least one other slice among the multiple slices, that respectively exhibit different contrasts due to only the first slice being affected by the single band excitation. In a second iteration of the single scanning sequence, another slice is excited with single band excitation, and the first slice is among the multiple slices excited with multi-band excitation. Raw data are then acquired from the first slice and at least one other slice among the multiple slices that have the respective contrasts swapped in comparison to the first iteration.
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公开(公告)号：US10209337B2
公开(公告)日：2019-02-19
申请号：US15139732
申请日：2016-04-27
IPC分类号： G01R33/36 , G01R33/561 , G01R33/483
摘要： In a method and apparatus for acquiring magnetic resonance (MR) raw data, an MR data acquisition scanner is operated to execute a turbo spin echo (TSE) or a turbo gradient spin echo (TGSE) sequence wherein nuclear spins are excited in multiple slices of the examination object simultaneously by radiating at least one radio-frequency (RF) pulse from an RF radiator of the MR data acquisition scanner, thereby causing the excited nuclear spins in said multiple slices to produce an echo train. A multi-band refocusing pulse is radiated that refocuses nuclear spins in at least one of said multiple slices that follows a first of the multiple slices, and readout gradients are activated to acquire MR signals, with respectively different contrasts, at respectively different readout times of the echo train. The read out MR signals are entered into an electronic memory organized as k-space.
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公开(公告)号：US20170315202A1
公开(公告)日：2017-11-02
申请号：US15139732
申请日：2016-04-27
IPC分类号： G01R33/561 , G01R33/54 , G01R33/385 , G01R33/36
CPC分类号： G01R33/5617 , G01R33/4835 , G01R33/5611
摘要： In a method and apparatus for acquiring magnetic resonance (MR) raw data, an MR data acquisition scanner is operated to execute a turbo spin echo (TSE) or a turbo gradient spin echo (TGSE) sequence wherein nuclear spins are excited in multiple slices of the examination object simultaneously by radiating at least one radio-frequency (RF) pulse from an RF radiator of the MR data acquisition scanner, thereby causing the excited nuclear spins in said multiple slices to produce an echo train. A multi-band refocusing pulse is radiated that refocuses nuclear spins in at least one of said multiple slices that follows a first of the multiple slices, and readout gradients are activated to acquire MR signals, with respectively different contrasts, at respectively different readout times of the echo train. The read out MR signals are entered into an electronic memory organized as k-space.
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公开(公告)号：US20170212199A1
公开(公告)日：2017-07-27
申请号：US15415122
申请日：2017-01-25
IPC分类号： G01R33/563 , G01R33/56 , G01R33/483 , G01R33/54
CPC分类号： G01R33/56341 , G01R33/4835 , G01R33/543 , G01R33/5608 , G01R33/56581
摘要： In diffusion-weighted magnetic resonance imaging, diffusion-encoded gradient pulses with an amplitude and a duration are activated. The amplitude and the duration of the gradient pulses are varied for various excitations of nuclear magnetization. The echo time for the various excitations of nuclear magnetization can be changed.
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