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1.发明授权公开(公告)号：US08384380B2
公开(公告)日：2013-02-26
申请号：US12663939
申请日：2008-06-25
IPC分类号： G01V3/00
CPC分类号： A61B5/055 , G01R33/4828 , G01R33/4835 , G01R33/5607
摘要： In order to stably obtain an even fat-suppressed image without reduction of an imaging efficiency and without being affected by unevenness of irradiation magnetic field of an RF pulse, when an imaging sequence having a first sequence part for suppressing a signal from a desired component of an examinee by applying a CHESS pulse and a second sequence part for measuring an echo signal from the examinee is repeated, the flip angle of the CHESS pulse is changed at plural times. In the case of multi-slice imaging, the flip angle of the CHESS pulse is changed in at lest two slice imaging.
摘要翻译： 为了稳定地获得均匀的脂肪抑制图像而不降低成像效率并且不受RF脉冲的照射磁场的不均匀性的影响，当具有用于抑制来自所需成分的信号的第一序列部分的成像序列 重复通过应用CHESS脉冲的受检者和用于测量来自受检者的回波信号的第二序列部分，CHESS脉冲的翻转角多次改变。 在多切片成像的情况下，CHESS脉冲的翻转角仅在两个切片成像中进行改变。
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2.发明授权Magnetic resonance imaging with unnecessary material suppression using multiple RF pulses 有权使用多个RF脉冲进行不必要的材料抑制的磁共振成像公开(公告)号：US08174263B2
公开(公告)日：2012-05-08
申请号：US13182732
申请日：2011-07-14
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/5607
摘要： A magnetic resonance imaging device includes a predetermined pulse sequence, the predetermined pulse sequence including an unnecessary material suppressing sequence unit for canceling a signal from an unnecessary material which is not a measurement target and a main imaging sequence unit for measuring a nuclear magnetic resonance signal used to create an image of an examinee. The unnecessary material suppressing sequence unit generates at least two or more high frequency magnetic field pulses so that the longitudinal magnetization of the unnecessary material is made spatially uniform in the imaging space under application of a first high frequency magnetic field pulse in the main imaging sequence unit.
摘要翻译： 磁共振成像装置包括预定的脉冲序列，该预定脉冲序列包括用于从不是测量对象的不需要的材料消除信号的不必要的材料抑制序列单元和用于测量使用的核磁共振信号的主要成像序列单元 创造一个考生的形象。 不需要的材料抑制序列单元产生至少两个或更多个高频磁场脉冲，使得在主成像序列单元中施加第一高频磁场脉冲时，不需要的材料的纵向磁化在成像空间中在空间上均匀 。
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公开(公告)号：US20110267060A1
公开(公告)日：2011-11-03
申请号：US13182732
申请日：2011-07-14
IPC分类号： G01R33/48
CPC分类号： G01R33/4828 , G01R33/5607
摘要： A magnetic resonance imaging device includes magnetic field generating means and control means for controlling receiving means according to a predetermined pulse sequence, the predetermined pulse sequence including an unnecessary material suppressing sequence unit for canceling a signal from an unnecessary material which is not a measurement target and a main imaging sequence unit for measuring a nuclear magnetic resonance signal used to create an image of an examinee. The unnecessary material suppressing sequence unit generates at least two or more high frequency magnetic field pulses so that the longitudinal magnetization of the unnecessary material is made spatially uniform in the imaging space under application of a first high frequency magnetic field pulse in the main imaging sequence unit. The magnetic resonance imaging device further includes adjusting means for adjusting the flip angles of the two or more high frequency magnetic field pulses, and the control means applies the two or more high frequency magnetic field pulses at the flip angles adjusted by the adjusting means.
摘要翻译： 磁共振成像装置包括磁场产生装置和用于根据预定脉冲序列控制接收装置的控制装置，所述预定脉冲序列包括用于从不是测量目标的不必要材料消除信号的不必要材料抑制序列单元，以及 用于测量用于创建受检者的图像的核磁共振信号的主要成像序列单元。 不需要的材料抑制序列单元产生至少两个或更多个高频磁场脉冲，使得在主成像序列单元中施加第一高频磁场脉冲时，不需要的材料的纵向磁化在成像空间中在空间上均匀 。 磁共振成像装置还包括用于调节两个或多个高频磁场脉冲的翻转角的调节装置，并且控制装置以由调节装置调节的翻转角施加两个或更多个高频磁场脉冲。
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4.发明授权Magnetic resonance imaging device configured to suppress signals from fat by excluding effect of non-uniformity of irradiated magnetic field 有权磁共振成像装置，其被配置为通过排除照射磁场的不均匀性的影响来抑制来自脂肪的信号公开(公告)号：US08040134B2
公开(公告)日：2011-10-18
申请号：US12439104
申请日：2007-09-28
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/5607
摘要： A magnetic resonance imaging device includes control means for controlling receiving means according to a predetermined pulse sequence that includes an unnecessary material suppressing sequence unit for suppressing a signal from an unnecessary material which is not a measurement target, and a main imaging sequence unit for measuring a nuclear magnetic resonance signal used to create an image of an examinee. The unnecessary material suppressing sequence unit generates at least two or more high frequency magnetic field pulses so that the longitudinal magnetization of the unnecessary material is made spatially uniform in the imaging space under application of a first high frequency magnetic field pulse in the main imaging sequence unit.
摘要翻译： 磁共振成像装置包括控制装置，用于根据预定脉冲序列来控制接收装置，该预定脉冲序列包括用于抑制来自不是测量目标的不必要材料的信号的不必要材料抑制序列单元和用于测量 核磁共振信号用于创建受检者的图像。 不需要的材料抑制序列单元产生至少两个或更多个高频磁场脉冲，使得在主成像序列单元中施加第一高频磁场脉冲时，不需要的材料的纵向磁化在成像空间中在空间上均匀 。
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5.发明申请公开(公告)号：US20100156418A1
公开(公告)日：2010-06-24
申请号：US12663939
申请日：2008-06-25
IPC分类号： G01R33/48
CPC分类号： A61B5/055 , G01R33/4828 , G01R33/4835 , G01R33/5607
摘要： In order to stably obtain an even fat-suppressed image without reduction of an imaging efficiency and without being affected by unevenness of irradiation magnetic field of an RF pulse, when an imaging sequence having a first sequence part for suppressing a signal from a desired component of an examinee by applying a CHESS pulse and a second sequence part for measuring an echo signal from the examinee is repeated, the flip angle of the CHESS pulse is changed at plural times. In the case of multi-slice imaging, the flip angle of the CHESS pulse is changed in at lest two slice imaging.
摘要翻译： 为了稳定地获得均匀的脂肪抑制图像而不降低成像效率并且不受RF脉冲的照射磁场的不均匀性的影响，当具有用于抑制来自所需成分的信号的第一序列部分的成像序列 重复通过应用CHESS脉冲的受检者和用于测量来自受检者的回波信号的第二序列部分，CHESS脉冲的翻转角多次改变。 在多切片成像的情况下，CHESS脉冲的翻转角仅在两个切片成像中进行改变。
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公开(公告)号：US20100013478A1
公开(公告)日：2010-01-21
申请号：US12439104
申请日：2007-09-28
IPC分类号： G01R33/48
CPC分类号： G01R33/4828 , G01R33/5607
摘要： A magnetic resonance imaging device includes magnetic field generating means and control means for controlling receiving means according to a predetermined pulse sequence, the predetermined pulse sequence including an unnecessary material suppressing sequence unit for canceling a signal from an unnecessary material which is not a measurement target and a main imaging sequence unit for measuring a nuclear magnetic resonance signal used to create an image of an examinee. The unnecessary material suppressing sequence unit generates at least two or more high frequency magnetic field pulses so that the longitudinal magnetization of the unnecessary material is made spatially uniform in the imaging space under application of a first high frequency magnetic field pulse in the main imaging sequence unit. The magnetic resonance imaging device further includes adjusting means for adjusting the flip angles of the two or more high frequency magnetic field pulses, and the control means applies the two or more high frequency magnetic field pulses at the flip angles adjusted by the adjusting means.
摘要翻译： 磁共振成像装置包括磁场产生装置和用于根据预定脉冲序列控制接收装置的控制装置，所述预定脉冲序列包括用于从不是测量目标的不必要材料消除信号的不必要材料抑制序列单元，以及 用于测量用于创建受检者的图像的核磁共振信号的主要成像序列单元。 不需要的材料抑制序列单元产生至少两个或更多个高频磁场脉冲，使得在主成像序列单元中施加第一高频磁场脉冲时，不需要的材料的纵向磁化在成像空间中在空间上均匀 。 磁共振成像装置还包括用于调节两个或多个高频磁场脉冲的翻转角的调节装置，并且控制装置以由调节装置调节的翻转角施加两个或更多个高频磁场脉冲。
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7.发明申请MAGNETIC RESONANCE APPARATUS UTILIZING TIME-VARYING RATE OF MAGNETIC RESONANT FREQUENCY 失效磁共振器利用磁共振频率的时变速率的磁共振装置公开(公告)号：US20090201020A1
公开(公告)日：2009-08-13
申请号：US12423431
申请日：2009-04-14
IPC分类号： G01R33/48
CPC分类号： A61B5/411 , A61B5/0037 , A61B5/055 , A61B5/415 , A61B5/416 , A61B5/418 , A61B5/7257 , G01R33/389 , G01R33/485
摘要： The present invention provides a magnetic resonance imaging system capable of performing spectrum measurement even when a magnetic resonant frequency changes during MRS measurement. A time-varying rate of a water magnetic resonant frequency is measured in advance before the MRS measurement. The amount of change in water magnetic resonant frequency during the MRS measurement is predicted from the measured time-varying rate. With the predicted value as the reference, a transmission frequency of an RF magnetic field irradiated in a signal suppression pulse sequence, a transmission frequency of an RF magnetic field for excitation and inversion and a received frequency at the detection of a magnetic resonance signal in a sequence of the MRS measurement are respectively set. A high-precision spectrum measurement is hence enabled.
摘要翻译： 本发明提供一种磁共振成像系统，即使MRS测量期间磁共振频率发生变化，也能进行光谱测量。 在MRS测量之前，预先测量水磁共振频率的时变速率。 MRS测量期间水磁共振频率的变化量根据测量的时变速率预测。 以预测值为参考，在信号抑制脉冲序列中照射的RF磁场的传输频率，用于激励和反转的RF磁场的传输频率和在检测磁共振信号中的接收频率 分别设置MRS测量的顺序。 因此，能够进行高精度的频谱测量。
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8.发明授权公开(公告)号：US07518362B2
公开(公告)日：2009-04-14
申请号：US10562643
申请日：2004-06-02
IPC分类号： G01V3/00
CPC分类号： A61B5/411 , A61B5/0037 , A61B5/055 , A61B5/415 , A61B5/416 , A61B5/418 , A61B5/7257 , G01R33/389 , G01R33/485
摘要： The present invention provides a magnetic resonance imaging system capable of performing spectrum measurement even when a magnetic resonant frequency changes during MRS measurement. A time-varying rate of a water magnetic resonant frequency is measured in advance before the MRS measurement. The amount of change in water magnetic resonant frequency during the MRS measurement is predicted from the measured time-varying rate. With the predicted value as the reference, a transmission frequency of an RF magnetic field irradiated in a signal suppression pulse sequence, a transmission frequency of an RF magnetic field for excitation and inversion and a received frequency at the detection of a magnetic resonance signal in a sequence of the MRS measurement are respectively set. A high-precision spectrum measurement is hence enabled.
摘要翻译： 本发明提供一种磁共振成像系统，即使MRS测量期间磁共振频率发生变化，也能进行光谱测量。 在MRS测量之前，预先测量水磁共振频率的时变速率。 MRS测量期间水磁共振频率的变化量根据测量的时变速率预测。 以预测值为参考，在信号抑制脉冲序列中照射的RF磁场的传输频率，用于激励和反转的RF磁场的传输频率和在检测磁共振信号中的接收频率 分别设置MRS测量的顺序。 因此，能够进行高精度的频谱测量。
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公开(公告)号：US06906515B2
公开(公告)日：2005-06-14
申请号：US10465976
申请日：2001-12-27
CPC分类号： G01R33/4828 , A61B5/055
摘要： When data of plural original images having different echo times are acquired to produce water/fat separated images by performing an processing operations in an MRI apparatus, a partial region of the original image data is specified and the specified region is subjected to the water/fat separation processing. Since noise components included in the specified region are fewer than those in the original image data, errors occurring due to noise components during unwrapping and other such processing operations can be reduced and image quality degradation be suppressed. Therefore, water/fat separated images having an excellent image quality can be produced. When echoes having different echo times are generated, rewind pulses are applied ahead of the readout gradient magnetic fields to equalize the polarities of the readout gradient magnetic fields. Consequently, influence of application of gradient magnetic fields on echo signals can be suppressed and the accuracy of water/fat separation can be improved.
摘要翻译： 获取具有不同回波时间的多个原始图像的数据，以通过在MRI装置中执行处理操作来产生水/脂肪分离的图像，指定原始图像数据的部分区域，并且指定区域经受水/脂肪 分离处理。 由于包含在指定区域中的噪声分量比原始图像数据中的噪声分量少，因此可以减少由于解包过程中的噪声成分而产生的误差和其他这样的处理操作，抑制了图像质量下降。 因此，可以产生具有优异图像质量的水/脂肪分离图像。 当产生具有不同回波时间的回波时，在读出梯度磁场之前施加倒带脉冲以均衡读出梯度磁场的极性。 因此，可以抑制梯度磁场对回波信号的影响，并且可以提高水/油分离的精度。
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公开(公告)号：US09274189B2
公开(公告)日：2016-03-01
申请号：US13512090
申请日：2010-11-29
申请人： Yoshihisa Soutome , Hideta Habara , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi
发明人： Yoshihisa Soutome , Hideta Habara , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi
IPC分类号： G01R33/34 , G01R33/48 , G01R33/345 , G01R33/36
CPC分类号： G01R33/34046 , G01R33/34053 , G01R33/34076 , G01R33/3453 , G01R33/3657 , G01R33/3678
摘要： There is provided a technique for securing a large examination space in a tunnel type MRI device without inviting increase of manufacturing cost and without significantly reducing irradiation efficiency or uniformity of the irradiation intensity distribution in an imaging region. Between rungs of a partially cylindrical RF coil, which coil corresponds to a cylindrical RF coil of which part is removed, there are disposed half-loops generating magnetic fields, which are synthesized with magnetic fields generated by loops constituted by adjacent rungs of the partially cylindrical RF coil and rings connecting the rungs to generate a circularly polarized or elliptically polarized magnetic field. Further, high-frequency signals of the same reference frequency having a desired amplitude ratio and phase difference are supplied to the partially cylindrical RF coils and half-loops.
摘要翻译： 提供了一种用于在隧道式MRI装置中确保大的检查空间的技术，而不会增加制造成本，并且不显着降低成像区域中的照射强度分布的照射效率或均匀性。 在部分圆柱形RF线圈的两个梯级之间，该线圈对应于部分被去除的圆柱形RF线圈，设置有产生磁场的半环，该磁场由具有由部分圆柱形的相邻梯级构成的环产生的磁场合成 RF线圈和环连接梯级以产生圆偏振或椭圆偏振磁场。 此外，具有期望幅度比和相位差的相同参考频率的高频信号被提供给部分圆柱形RF线圈和半环。
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