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1.发明授权公开(公告)号：US08483466B2
公开(公告)日：2013-07-09
申请号：US12991561
申请日：2009-05-18
申请人： Takayuki Abe , Tetsuhiko Takahashi
发明人： Takayuki Abe , Tetsuhiko Takahashi
IPC分类号： G06K9/00
CPC分类号： A61B5/055 , A61B5/02007 , A61B5/489 , G01R33/56316 , G01R33/5635 , G01R33/56518
摘要： Plural blood vessels different in blood flow velocity are depicted with high image quality in blood vessel imaging using PC-MRA method. For this purpose, the present invention performs a measurement of an echo signal based on application of a positive-polarity flow encode pulse and a measurement of an echo signal based on application of a negative-polarity flow encode pulse on an examinee with each of plural phase encodes while varying the flow encode, and a blood vessel image of the examinee is reconstructed by using the plural echo signals having different flow encode absolute values.
摘要翻译： 使用PC-MRA方法在血管成像中描绘了血流速度不同的多个血管，具有高图像质量。 为此，本发明基于正极极性流编码脉冲的应用和基于在受检者上施加负极性流编码脉冲的回波信号的测量来执行回波信号的测量，其中多个 相位编码，同时改变流编码，并且通过使用具有不同流编码绝对值的多个回波信号来重建受检者的血管图像。
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公开(公告)号：US20120141007A1
公开(公告)日：2012-06-07
申请号：US13389620
申请日：2010-08-02
IPC分类号： G06K9/00
CPC分类号： A61B5/055 , A61B5/0402 , A61B5/0816 , A61B5/7207 , A61B5/7285 , G01R33/482 , G01R33/4824 , G01R33/5617 , G01R33/5673
摘要： An image with a desired contrast is obtained while suppressing body motion artifacts caused by both random motion and periodic motion of an object. In order to do so, an imaging sequence using a non-Cartesian sampling method is executed so as to synchronize with a biological signal only at the start time and a repetition time (TR), which is an execution interval between shots within the imaging sequence, is maintained. In addition, a time difference between a delay time and a start time of each shot is calculated, and a shot with a predetermined time difference or more is executed again after the TR time.
摘要翻译： 获得具有期望对比度的图像，同时抑制由对象的随机运动和周期性运动引起的身体运动伪影。 为了这样做，执行使用非笛卡尔采样方法的成像序列，以便仅在开始时与生物信号同步，并且重复时间（TR）是成像序列内的拍摄之间的执行间隔 ，维持。 此外，计算出每个镜头的延迟时间和开始时间之间的时间差，并且在TR时间之后再次执行具有预定时间差的镜头。
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公开(公告)号：US20100219828A1
公开(公告)日：2010-09-02
申请号：US12159177
申请日：2006-12-26
申请人： Tetsuhiko Takahashi , Takayuki Abe , Hisako Nagao
发明人： Tetsuhiko Takahashi , Takayuki Abe , Hisako Nagao
IPC分类号： G01R33/48
CPC分类号： G01R33/56375 , A61B5/0555 , A61B5/7257 , G01R33/56383 , G01R33/5676
摘要： A magnetic resonance imaging apparatus comprises object placing means for placing an object in an imaging space, translating means for translating the object in a given direction by translating the object placing means in the given direction continuously or step-wise, magnetic field generating means for exciting the desired region of the object by generating a static magnetic field, a gradient magnetic field in the imaging space, and a high-frequency magnetic field in the imaging space, signal detecting means for detecting a magnetic resonance signal from the object, and control unit for controlling the translating means, magnetic field generating means and the signal detecting means, and translating the object continuously or stepwise to a predetermined position at a predetermined speed so as to capture a magnetic resonance image of the object.The magnetic resonance imaging apparatus further comprises translation error detecting means for detecting an error of the position or the set value of the speed, and correcting means for correcting the error detected by the positional error detecting means.
摘要翻译： 磁共振成像装置包括用于将物体放置在成像空间中的物体放置装置，用于通过沿着给定方向连续或逐步平移物体放置装置在给定方向上平移物体的平移装置，用于激发 通过产生静态磁场，成像空间中的梯度磁场和成像空间中的高频磁场来产生物体的期望区域，用于检测来自物体的磁共振信号的信号检测装置，以及控制单元 用于控制平移装置，磁场产生装置和信号检测装置，并以预定速度将物体连续或逐步地转移到预定位置，以便捕获物体的磁共振图像。 磁共振成像装置还包括用于检测位置误差或速度设定值的平移误差检测装置，以及用于校正由位置误差检测装置检测到的误差的校正装置。
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4.发明授权Magnetic resonance imaging apparatus and method with adjustment in positioning within imaging space to correct deviation from desired position 有权磁共振成像装置和方法，其调整成像空间内的定位以校正与期望位置的偏差公开(公告)号：US07486076B2
公开(公告)日：2009-02-03
申请号：US11662108
申请日：2005-09-02
IPC分类号： G01V3/00
CPC分类号： A61B5/055 , G01R33/56375
摘要： An MRI apparatus and method are provided which are capable of properly setting imaging position of regions of a subject on a table and moving the table to the set positions, for imaging a wide range or the entire body range of the subject.
摘要翻译： 提供了一种MRI装置和方法，其能够将桌子上的区域的成像位置适当地设置在桌子上并将桌子移动到设定位置，以对被摄体的宽范围或整个身体范围进行成像。
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公开(公告)号：US08855392B2
公开(公告)日：2014-10-07
申请号：US13389620
申请日：2010-08-02
IPC分类号： G06K9/00 , A61B5/055 , A61B5/00 , G01R33/567 , A61B5/0402 , A61B5/08 , G01R33/48 , G01R33/561
CPC分类号： A61B5/055 , A61B5/0402 , A61B5/0816 , A61B5/7207 , A61B5/7285 , G01R33/482 , G01R33/4824 , G01R33/5617 , G01R33/5673
摘要： An image with a desired contrast is obtained while suppressing body motion artifacts caused by both random motion and periodic motion of an object. In order to do so, an imaging sequence using a non-Cartesian sampling method is executed so as to synchronize with a biological signal only at the start time and a repetition time (TR), which is an execution interval between shots within the imaging sequence, is maintained. In addition, a time difference between a delay time and a start time of each shot is calculated, and a shot with a predetermined time difference or more is executed again after the TR time.
摘要翻译： 获得具有期望对比度的图像，同时抑制由对象的随机运动和周期性运动引起的身体运动伪影。 为了这样做，执行使用非笛卡尔采样方法的成像序列，以便仅在开始时与生物信号同步，并且重复时间（TR）是成像序列内的拍摄之间的执行间隔 ，维持。 此外，计算出每个镜头的延迟时间和开始时间之间的时间差，并且在TR时间之后再次执行具有预定时间差的镜头。
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公开(公告)号：US07847549B2
公开(公告)日：2010-12-07
申请号：US12159177
申请日：2006-12-26
申请人： Tetsuhiko Takahashi , Takayuki Abe , Hisako Nagao
发明人： Tetsuhiko Takahashi , Takayuki Abe , Hisako Nagao
IPC分类号： G01V3/00
CPC分类号： G01R33/56375 , A61B5/0555 , A61B5/7257 , G01R33/56383 , G01R33/5676
摘要： A magnetic resonance imaging apparatus comprises object placing means for placing an object in an imaging space, translating means for translating the object in a given direction by translating the object placing means in the given direction continuously or step-wise, magnetic field generating means for exciting the desired region of the object by generating a static magnetic field, a gradient magnetic field in the imaging space, and a high-frequency magnetic field in the imaging space, signal detecting means for detecting a magnetic resonance signal from the object, and control unit for controlling the translating means, magnetic field generating means and the signal detecting means, and translating the object continuously or stepwise to a predetermined position at a predetermined speed so as to capture a magnetic resonance image of the object.The magnetic resonance imaging apparatus further comprises translation error detecting means for detecting an error of the position or the set value of the speed, and correcting means for correcting the error detected by the positional error detecting means.
摘要翻译： 磁共振成像装置包括用于将物体放置在成像空间中的物体放置装置，用于通过沿着给定方向连续或逐步平移物体放置装置在给定方向上平移物体的平移装置，用于激发 通过产生静态磁场，成像空间中的梯度磁场和成像空间中的高频磁场来产生物体的期望区域，用于检测来自物体的磁共振信号的信号检测装置，以及控制单元 用于控制平移装置，磁场产生装置和信号检测装置，并以预定速度将物体连续或逐步地转移到预定位置，以便捕获物体的磁共振图像。 磁共振成像装置还包括用于检测位置误差或速度设定值的平移误差检测装置，以及用于校正由位置误差检测装置检测到的误差的校正装置。
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公开(公告)号：US20100244823A1
公开(公告)日：2010-09-30
申请号：US12295160
申请日：2007-03-12
申请人： Takayuki Abe , Tetsuhiko Takahashi
发明人： Takayuki Abe , Tetsuhiko Takahashi
IPC分类号： G01R33/48
CPC分类号： G01R33/56375 , A61B5/055 , G01R33/243 , G01R33/543 , G01R33/56383 , G01R33/56563 , G01R33/58
摘要： A magnetic resonance imaging apparatus comprising static magnetic field generating means for generating a static magnetic field in an imaging space, measuring means for generating a high-frequency magnetic field and a gradient magnetic field in the imaging space and measuring a nuclear magnetic resonance signal generated from an object to be examined placed in the imaging space, signal processing means for reconstructing a magnetic resonance image according to the nuclear magnetic resonance signal, control means for controlling the measuring means and the signal processing means, and display means for displaying the reconstructed magnetic resonance image obtained by the signal processing means.The magnetic resonance imaging apparatus further comprises storing means for storing a first set of information representing an inhomogeneous distribution of the static magnetic field generated depending on the characteristic of the static magnetic field generating means and a second set of information representing an inhomogeneous distribution of the static magnetic field generated depending on the tissue of the object, setting means for setting a field of view for imaging in a desired region of the object, selecting means for selecting information corresponding to the set field of view for imaging out of the second set of information as a third set of information, and correcting magnetic field generating means for generating a correcting magnetic field according to the third set of information and the first set of the information.
摘要翻译： 一种磁共振成像设备，包括用于在成像空间中产生静态磁场的静态磁场产生装置，用于在所述成像空间中产生高频磁场和梯度磁场的测量装置，并且测量由 将要检查的物体放置在成像空间中，用于根据核磁共振信号重建磁共振图像的信号处理装置，用于控制测量装置和信号处理装置的控制装置，以及显示重建磁共振 由信号处理装置获得的图像。 磁共振成像装置还包括存储装置，用于存储表示根据静磁场产生装置的特性产生的静态磁场的不均匀分布的第一组信息，以及第二组信息，其表示静态磁场的不均匀分布 根据物体的组织产生的磁场，用于在对象的期望区域中设置用于成像的视野的设置装置，用于从第二组信息中选择与用于成像的设定视野相对应的信息的选择装置 作为第三组信息，以及校正磁场产生装置，用于根据第三组信息和第一组信息产生校正磁场。
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公开(公告)号：US07768263B2
公开(公告)日：2010-08-03
申请号：US12331005
申请日：2008-12-09
IPC分类号： G01V3/00
CPC分类号： A61B5/055 , G01R33/56375
摘要： A magnetic resonance imaging apparatus comprises static magnetic field generating means for generating a static magnetic field in an imaging space, a gradient magnetic field generating means for generating a gradient magnetic field in the imaging space, high-frequency magnetic field generating means for generating a high-frequency magnetic field so as to induce nuclear magnetic resonance in a subject placed in the imaging space, signal receiving means for detecting a nuclear magnetic resonance signal from the subject, signal processing means for reconstructing an image by using the detected nuclear magnetic resonance signal, display means for displaying the image, a table for placing the subject thereon to dispose the subject in the imaging means, and table moving means for moving the table on which the subject is placed.While moving the portions to be imaged of the subject continuously or stepwise in the imaging space and disposing the subject, a whole-body image of a large region of the subject is created.The magnetic resonance imaging apparatus further comprises means for detecting information on the displacement of the subject from a desired position and setting means for setting movement information on the table according to the displacement information.The table moving means moves the table according to the movement information set by the setting means to capture the whole-body image.
摘要翻译： 磁共振成像装置包括用于在成像空间中产生静磁场的静磁场产生装置，用于在成像空间中产生梯度磁场的梯度磁场产生装置，用于产生高电平的高频磁场产生装置 频率磁场，以便在放置在成像空间中的对象中引起核磁共振，用于检测来自对象的核磁共振信号的信号接收装置，用于通过使用检测到的核磁共振信号重建图像的信号处理装置， 用于显示图像的显示装置，用于将被摄体放置在其上以将被摄体置于成像装置中的台子以及用于移动放置被摄体的台的台移动装置。 在成像空间中连续或逐步移动被摄体的成像部分并配置被摄体的同时，创建被检体的大区域的全身图像。 磁共振成像装置还包括用于检测来自所需位置的被摄体的位移的信息的装置和用于根据位移信息设置在桌子上的移动信息的设定装置。 桌子移动装置根据由设置装置设置的移动信息移动桌子以捕获全身图像。
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9.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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