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41.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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43.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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44.发明申请公开(公告)号：US20110245655A1
公开(公告)日：2011-10-06
申请号：US13139041
申请日：2009-12-22
IPC分类号： A61B5/055
CPC分类号： G01R33/565 , G01R33/4816 , G01R33/4833
摘要： When executing an imaging pulse sequence using a high frequency magnetic field pulse with a partial waveform of a predetermined waveform, an application start time of a slice gradient magnetic field applied simultaneously with the high frequency magnetic field pulse is corrected. Specifically, a magnetic resonance signal for correcting the imaging pulse sequence is acquired by executing a prescan sequence using a high frequency magnetic field pulse with a predetermined waveform, an application start time of a slice selection gradient magnetic field in the imaging pulse sequence is corrected using the magnetic resonance signal for correction, and the imaging pulse sequence is executed by applying the slice selection gradient magnetic field with the corrected application start time.
摘要翻译： 当使用具有预定波形的部分波形的高频磁场脉冲执行成像脉冲序列时，校正与高频磁场脉冲同时施加的切片梯度磁场的施加开始时间。 具体地，通过使用具有预定波形的高频磁场脉冲执行预扫描序列来获取用于校正成像脉冲序列的磁共振信号，使用成像脉冲序列中的切片选择梯度磁场的施加开始时间来校正使用 用于校正的磁共振信号和成像脉冲序列通过应用具有校正的应用开始时间的切片选择梯度磁场来执行。
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公开(公告)号：US20110089948A1
公开(公告)日：2011-04-21
申请号：US12912385
申请日：2010-10-26
IPC分类号： G01R33/48
CPC分类号： G01R33/561 , G01R33/4824 , G01R33/56375 , G01R33/56383 , G01R33/56518 , G01R33/56563 , G01R33/56572
摘要： An MRI apparatus includes an imaging means being provided with a means for generating magnetic fields respectively of a static magnetic field, a gradient magnetic field, and an RF magnetic field, and a means for receiving an echo signal generated from a subject, the imaging means being for measuring echo data associated with at least one measurement trajectory in k-space, while varying angles with respect to a coordinate axis in the k-space of the measurement trajectory, so as to collect at least one measured data for each of the angles; and an image reconstruction means for rearranging the measured data in the k-space and reconstructing an image; wherein, the image reconstruction means calculates a phase for correction based on standard data selected from the measured data for each of the angles, prior to rearranging the measured data in the k-space, and performs a phase correction as to the measured data, by using the phase for correction being calculated. With the procedure above, it is possible to reduce an artifact caused by the nonlinearity of the gradient magnetic field and/or inhomogeneities of the magnetic field, without extending the imaging time.
摘要翻译： MRI装置包括成像装置，其具有分别产生静磁场，梯度磁场和RF磁场的磁场的装置，以及用于接收从被摄体产生的回波信号的装置，所述成像装置 用于测量与k空间中的至少一个测量轨迹相关联的回波数据，同时相对于测量轨迹的k空间中的坐标轴改变角度，以便针对每个角度收集至少一个测量数据 ; 以及图像重建装置，用于重新排列k空间中的测量数据并重构图像; 其特征在于，所述图像重构单元在重新排列所述k空间内的测量数据之前，根据从所测量的每个角度的数据中选出的标准数据，计算出校正相位，并对所述测量数据进行相位修正， 使用校正相位进行计算。 通过上述过程，可以减少由梯度磁场的非线性引起的伪影和/或磁场的不均匀性，而不会延长成像时间。
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46.发明申请公开(公告)号：US20100087729A1
公开(公告)日：2010-04-08
申请号：US12523343
申请日：2008-02-01
IPC分类号： A61B5/055
CPC分类号： A61B5/055 , A61B5/7285 , G01R33/5616 , G01R33/56375 , G01R33/56383 , G01R33/5673
摘要： When multiple types of imaging are performed while moving a table on which a subject to be examined is placed, an imaging efficiency is improved and a high-quality image is obtained within a short time. Therefore, within a predetermined time interval such as an identical period of a periodic living body motion, a predetermined number of echo signals from each of the multiple types of imaging sequences are acquired and the table on which the subject to be examined is placed is moved. Along with the movement of the table, data items within the same range in the Ky-direction as to each of the imaging sequences are acquired, the moving speed of the table is controlled in such a manner that the acquired data items become continuous in the x-direction, and images are reconstructed based on the data items obtained respectively from the imaging sequences.
摘要翻译： 当在移动要被检查对象的表格的同时执行多种类型的成像时，提高成像效率并且在短时间内获得高质量图像。 因此，在诸如周期性生物体运动的相同周期的预定时间间隔内，获取来自多种类型的成像序列中的每一种的预定数量的回波信号，并且移动放置被检查对象的表 。 随着桌子的移动，获取与每个成像序列相同的Ky方向上的数据项，表格的移动速度被控制成使获取的数据项在 x方向，并且基于从成像序列分别获得的数据项重建图像。
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公开(公告)号：US07535226B2
公开(公告)日：2009-05-19
申请号：US11666599
申请日：2005-10-27
申请人： Tetsuhiko Takahashi , Tomohiro Goto
发明人： Tetsuhiko Takahashi , Tomohiro Goto
IPC分类号： G01V3/00
CPC分类号： G01R33/56375 , A61B5/055 , A61B5/7285 , G01R33/4833 , G01R33/5635 , G01R33/56383 , G01R33/5673 , G01R33/5676
摘要： There is provided an MRI apparatus that is capable of imaging ON/OFF in response to a biological gating signal and changing conditions for imaging, even while the moving bed imaging is performed, and further reducing a load on a subject to be examined, which is caused by fluctuations in the bed moving velocity. A controller that controls a bed to transport the examined subject in a static magnetic field and a unit to apply an RF magnetic field and a gradient magnetic field for imaging configures settings so that the bed moving velocity is kept constant considering an entire imaging time, and further controls the magnetic applying unit for applying the RF magnetic field and the gradient magnetic field so that a moving velocity of the FOV (imaging area) in the subject coordinate system is made different from the bed moving velocity.
摘要翻译： 提供了一种MRI装置，其能够响应于生物门控信号和变化的成像条件来对ON / OFF进行成像，即使在执行移动床成像的同时，进一步降低被检查对象的负荷，即 由床移动速度波动引起的。 一个控制器，其控制床以静态磁场传送被检查的被摄体，并且单元用于施加用于成像的RF磁场和梯度磁场，构成设置，使得考虑到整个成像时间，床移动速度保持不变，以及 进一步控制用于施加RF磁场和梯度磁场的磁性施加单元，使得对象坐标系中的FOV（成像区域）的移动速度与床移动速度不同。
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48.发明申请公开(公告)号：US20080298799A1
公开(公告)日：2008-12-04
申请号：US12034993
申请日：2008-02-21
IPC分类号： G02F1/00
CPC分类号： H04Q11/0067 , H04L12/2861 , H04L12/287 , H04M7/123 , H04Q2011/0088 , H04Q2213/1301
摘要： In a broadband access network, calls can be kept active even when a telephone network fails. A voice gateway function captures callee telephone number information sent from a caller subscriber telephone to the telephone network and, when the telephone network fails, keeps the call active by retaining the connection between the caller and the callee. Furthermore, when the telephone network fails, the operation mode of the voice gateway and all ONTs is switched from an H.248 gateway mode to an SIP softswitch mode, allowing the voice gateway function to relay communication packets between ONTs and new call connections to be made in the broadband access network.
摘要翻译： 在宽带接入网络中，即使电话网络发生故障，也可以保持呼叫。 语音网关功能捕获从主叫用户电话发送到电话网络的被叫方电话号码信息，并且当电话网络发生故障时，通过保持主叫方和被叫方之间的连接来保持呼叫的活跃状态。 此外，当电话网络发生故障时，语音网关和所有ONT的操作模式从H.248网关模式切换到SIP软交换模式，允许语音网关功能将ONT和新呼叫连接之间的通信分组中继为 在宽带接入网中制造。
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公开(公告)号：US20060183996A1
公开(公告)日：2006-08-17
申请号：US10549340
申请日：2004-03-12
申请人： Takayuki Abe , Tetsuhiko Takahashi
发明人： Takayuki Abe , Tetsuhiko Takahashi
IPC分类号： A61B5/05
CPC分类号： G01R33/5676 , G01R33/563
摘要： A magnetic resonance imaging system in which measurement data (k space data) of arterial phase is extracted easily (and instantaneously) after imaging a plurality of time phases including the arterial phase and its image can be displayed in dynamic MRA measurement employing a contrast medium. Dynamic measurement is thereby carried out using a means for extracting the time phase evaluation values (e.g. the origin data in k space) in respective time phases and then automatically extracting a data set including a time phase where the time phase evaluation value reaches a specified threshold value.
摘要翻译： 可以在使用造影剂的动态MRA测量中显示其中在成像包括动脉期及其图像的多个时间段之后容易地（并且瞬间）提取动脉相的测量数据（k空间数据）的磁共振成像系统。 由此，使用用于在各时间段中提取时间相位评估值（例如，k空间中的原始数据）的装置进行动态测量，然后自动提取包括时间相位评估值达到指定阈值的时间相位的数据集 值。
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公开(公告)号：US06876198B2
公开(公告)日：2005-04-05
申请号：US10380115
申请日：2001-09-11
IPC分类号： A61B5/055 , G01R33/28 , G01R33/54 , G01R33/561 , G01V3/00
CPC分类号： G01R33/285 , A61B5/055 , G01R33/54 , G01R33/5611
摘要： A magnetic resonance imaging apparatus is provided with a sequencer for executing a rapid imaging sequence of up to 100 ms at a full scan, a parallel measurement system for executing a partial encoding measurement in which the number of phase encoding operations performed for the measurement is reduced, an image processing system for reconstructing images from the information obtained though parallel measurements and composing reconstructed images of a plurality of areas to make one image, a display system for displaying the obtained images at a rate of 50 frame/second or more, and an image renewal system for taking in coordinate information of the cross-section to be imaged from position and pointing devices at intervals of about 0.1 second, and renewing the cross-section to be imaged in real time. Thus, imaging on the cross-sections indicated by a device can be performed in real time with high spatial and high time resolution.
摘要翻译： 磁共振成像装置设置有用于在全扫描时执行高达100ms的快速成像序列的定序器，用于执行部分编码测量的并行测量系统，其中对测量执行的相位编码操作的数量减少 ，图像处理系统，用于根据通过并行测量获得的信息重构图像，并且构成多个区域的重建图像以形成一个图像;显示系统，用于以50帧/秒以上的速率显示所获得的图像;以及 图像更新系统，用于以约0.1秒的间隔获取要从位置和指点设备成像的横截面的坐标信息，并实时更新要成像的横截面。 因此，可以以高空间和高时间分辨率实时地执行由装置指示的横截面上的成像。
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