公开(公告)号：US20140046168A1

公开(公告)日：2014-02-13

申请号：US14039171

申请日：2013-09-27

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Yoshimori KASSAI ,  Mitsue MIYAZAKI ,  Satoshi SUGIURA

IPC分类号： A61B5/055

CPC分类号： A61B5/055 ,  A61B5/0456 ,  A61B5/7207 ,  A61B5/7257 ,  A61B5/7285 ,  G01R33/4828 ,  G01R33/5605 ,  G01R33/5607 ,  G01R33/5615 ,  G01R33/5617 ,  G01R33/5635 ,  G01R33/5673

摘要： A magnetic resonance imaging (MRI) system obtains an MR image of an object. The system detects an ECG signal and performs a pulse sequence of RF gradient magnetic fields toward the object. Imaging defined by the pulse sequence is longer in temporal length than one heartbeat. The system further acquires an MR signal from the object in response to performance of the pulse sequence and produces the MR image based on the acquired MR signal. Also possible are: a plurality of divided MT pulses instead of the conventional single MT pulse, an SE-system pulse sequence having a shorter echo train spacing, and the generation of sounds by applying gradient pulses incorporated in an imaging pulse sequence so as to automatically instruct a patient to perform an intermittent breath hold.

摘要翻译： 磁共振成像（MRI）系统获得物体的MR图像。 该系统检测ECG信号，并向对象执行RF梯度磁场的脉冲序列。 由脉冲序列定义的成像在时间长度上比一个心跳长。 系统还响应于脉冲序列的性能从对象获取MR信号，并且基于所获取的MR信号产生MR图像。 还可能的是：多个划分的MT脉冲而不是传统的单个MT脉冲，具有较短回波列间隔的SE系统脉冲序列，以及通过应用结合在成像脉冲序列中的梯度脉冲来产生声音，以便自动地 指示患者进行间歇性呼吸。

公开(公告)号：US08560049B2

公开(公告)日：2013-10-15

申请号：US13283948

申请日：2011-10-28

申请人： Yoshimori Kassai ,  Mitsue Miyazaki ,  Satoshi Sugiura

发明人： Yoshimori Kassai ,  Mitsue Miyazaki ,  Satoshi Sugiura

IPC分类号： A61B5/05

CPC分类号： A61B5/055 ,  A61B5/0456 ,  A61B5/7207 ,  A61B5/7257 ,  A61B5/7285 ,  G01R33/4828 ,  G01R33/5605 ,  G01R33/5607 ,  G01R33/5615 ,  G01R33/5617 ,  G01R33/5635 ,  G01R33/5673

摘要： A magnetic resonance imaging (MRI) system obtains an MR image of an object. The system detects an ECG signal and performs a pulse sequence of RF gradient magnetic fields toward the object. Imaging defined by the pulse sequence is longer in temporal length than one heartbeat. The system further acquires an MR signal from the object in response to performance of the pulse sequence and produces the MR image based on the acquired MR signal. Also possible are: a plurality of divided MT pulses instead of the conventional single MT pulse, an SE-system pulse sequence having a shorter echo train spacing, and the generation of sounds by applying gradient pulses incorporated in an imaging pulse sequence so as to automatically instruct a patient to perform an intermittent breath hold.

公开(公告)号：US08085040B2

公开(公告)日：2011-12-27

申请号：US12926023

申请日：2010-10-21

申请人： Shinya Yamada ,  Hitoshi Kanazawa ,  Tokunori Kimura ,  Masaaki Umeda

发明人： Shinya Yamada ,  Hitoshi Kanazawa ,  Tokunori Kimura ,  Masaaki Umeda

IPC分类号： G01V3/00

CPC分类号： G01R33/56308 ,  A61B5/0263 ,  A61B5/7285 ,  G01R33/5602 ,  G01R33/5614 ,  G01R33/5615 ,  G01R33/5616 ,  G01R33/5617 ,  G01R33/56316 ,  G01R33/56333 ,  G01R33/56509 ,  G01R33/5673 ,  G01R33/5676

摘要： A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the application of the labeling pulse, and a control unit, the control unit controlling the imaging unit so that the echo signal in the imaging region is collected a plurality of times with variations in the inversion time, the control unit also controlling the imaging unit so that a time ranging from a reference time point within a biological signal obtained from a subject to the application of the labeling pulse is a time determined in accordance with the inversion time.

摘要翻译： 磁共振成像装置包括成像单元，该成像单元施加标记脉冲以反转在成像区域的一部分内的标记区域中包含的自旋，然后从反转时间过去的时间点收集回波信号， 标记脉冲和控制单元，所述控制单元控制所述成像单元，使得所述成像区域中的回波信号在所述反转时间的变化中被多次收集，所述控制单元还控制所述成像单元，使得所述时间范围 从从受试者获得的生物信号中的参考时间点到施加标记脉冲是根据反转时间确定的时间。

公开(公告)号：US08022701B2

公开(公告)日：2011-09-20

申请号：US12337388

申请日：2008-12-17

申请人： Jyh-Horng Chen ,  Tzi-Dar Chiueh ,  Edzer L. Wu ,  Li-Wei Kuo

发明人： Jyh-Horng Chen ,  Tzi-Dar Chiueh ,  Edzer L. Wu ,  Li-Wei Kuo

IPC分类号： G01V3/00

CPC分类号： G01R33/4835 ,  G01R33/446 ,  G01R33/4822 ,  G01R33/4836 ,  G01R33/54 ,  G01R33/543 ,  G01R33/5615

摘要： Provided is a method for simultaneously acquiring magnetic resonance slices/slabs of a subject. The method comprises steps as follows. First, apply one or more than one RF pulse, which carries at least two frequency components, and a slice/slab selection magnetic field gradient so that at least two slices/slabs of the subject respectively corresponding to the at least two frequency components are excited simultaneously. Second, apply a spatial encoding magnetic field gradient. Third, apply a slice/slab separation magnetic field gradient so as to separate the at least two slices/slabs. The method according to the present invention can be used to acquire data for simultaneously reconstructing multiple slices/slabs. The method is compatible with existing MRI systems.

摘要翻译： 提供了一种用于同时获取被检体的磁共振切片/板的方法。 该方法包括以下步骤。 首先，应用一个或多于一个RF脉冲，其携带至少两个频率分量，以及切片/平板选择磁场梯度，使得分别对应于至少两个频率分量的被摄体的至少两个切片/平板被激发 同时。 二，应用空间编码磁场梯度。 第三，应用切片/平板分离磁场梯度，以分离至少两个切片/平板。 根据本发明的方法可以用于获取用于同时重建多个切片/平板的数据。 该方法与现有MRI系统兼容。

公开(公告)号：US08008915B2

公开(公告)日：2011-08-30

申请号：US12343564

申请日：2008-12-24

申请人： Masashi Ookawa

发明人： Masashi Ookawa

IPC分类号： G01V3/00

CPC分类号： G01R33/56518 ,  G01R33/5615 ,  G01R33/5616

摘要： A magnetic resonance imaging apparatus includes a data acquisition unit and an image generating unit. The data acquisition unit acquires echo signals by echo planar imaging which generates the echo signals by applying plural phase-encoding gradient magnetic field pulses and by repeatedly inverting a readout gradient magnetic field after one nuclear magnetic resonance (NMR) excitation. Each of the plural phase-encoding gradient magnetic field pulses has an intensity set so as to compensate an influence of spatially distributed eddy currents to each of the spatial imaging positions. The image generating unit generates MRI data and an image based on the acquired echo signals.

摘要翻译： 磁共振成像装置包括数据获取单元和图像生成单元。 数据采集​​单元通过回波平面成像获取回波信号，通过应用多个相位编码梯度磁场脉冲和通过在一次核磁共振（NMR）激发之后重复反转读出梯度磁场来产生回波信号。 多个相位编码梯度磁场脉冲中的每一个具有设定的强度，以补偿空间分布的涡流对每个空间成像位置的影响。 图像生成单元基于获取的回波信号生成MRI数据和图像。

公开(公告)号：US07952355B2

公开(公告)日：2011-05-31

申请号：US12362560

申请日：2009-01-30

申请人： Geir Torheim ,  Giovanni Sebastiani

发明人： Geir Torheim ,  Giovanni Sebastiani

IPC分类号： G01V3/00

CPC分类号： G01R33/56 ,  G01R33/4828 ,  G01R33/5601 ,  G01R33/5608 ,  G01R33/5615 ,  G01R33/56527 ,  G01R33/56554

摘要： An MR imaging apparatus is disclosed, wherein the MR imaging apparatus includes a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system controlled by a pulse module to transmit RF signals to an RF coil assembly. The MR imaging apparatus also includes a controller coupled to the plurality of gradient coils and the RF transceiver system and programmed to obtain MR image signals at different echo times from a subject containing metabolites having known characteristics. The controller is further programmed to reconstruct images of the metabolites in a selected region of interest (ROI) using a probabilistic mathematical expression based on known information regarding an image acquisition process and using a spatial distribution of the metabolites to account for artifacts in the images.

摘要翻译： 公开了一种MR成像设备，其中MR成像设备包括围绕磁体的孔定位的多个梯度线圈和由脉冲模块控制的RF收发器系统，以将RF信号传输到RF线圈组件。 MR成像设备还包括耦合到多个梯度线圈和RF收发器系统的控制器，并被编程以从包含具有已知特征的代谢物的受试者获得不同回波时间的MR图像信号。 控制器还被编程为使用基于关于图像获取过程的已知信息的概率数学表达来重建所选择的感兴趣区域（ROI）中的代谢物的图像，并且使用代谢物的空间分布来解释图像中的伪影。

公开(公告)号：US20110105890A1

公开(公告)日：2011-05-05

申请号：US12813581

申请日：2010-09-03

申请人： Thoralf Niendorf ,  Fabian Hezel

发明人： Thoralf Niendorf ,  Fabian Hezel

IPC分类号： A61B5/055

CPC分类号： G01R33/5615 ,  G01R33/4833 ,  G01R33/5601 ,  G01R33/5602 ,  G01R33/5607 ,  G01R33/5611 ,  G01R33/5617 ,  G01R33/56316 ,  G01R33/56341 ,  G01R33/5635 ,  G01R33/5673

摘要： A magnetic-resonance imager is operated by, within the time of a R-R interval of the heart, carrying out a preparation sequence for suppressing signal contributions from the blood is carried out, in particular by a saturation sequence. At least the first refocusing pulse is generated simultaneously with a layer-selective gradient magnetic field that acts orthogonally to the layer-selective gradient magnetic field at the time of the generation of the RF excitation pulse. In addition the measuring value acquisition and image generation takes place by means of subsampling the data space and/or partially sampling the data space.

摘要翻译： 磁共振成像器通过在心脏的R-R间隔的时间内进行，以执行用于抑制来自血液的信号贡献的制备顺序，特别是通过饱和序列进行。 至少第一重聚焦脉冲与在产生RF激励脉冲时与层选择性梯度磁场正交作用的层选择性梯度磁场同时产生。 此外，通过对数据空间进行子采样和/或部分采样数据空间来进行测量值采集和图像生成。

公开(公告)号：US07880464B2

公开(公告)日：2011-02-01

申请号：US11898110

申请日：2007-09-10

申请人： Shinya Yamada ,  Hitoshi Kanazawa ,  Tokunori Kimura ,  Masaaki Umeda

发明人： Shinya Yamada ,  Hitoshi Kanazawa ,  Tokunori Kimura ,  Masaaki Umeda

IPC分类号： G01V3/00

CPC分类号： G01R33/56308 ,  A61B5/0263 ,  A61B5/7285 ,  G01R33/5602 ,  G01R33/5614 ,  G01R33/5615 ,  G01R33/5616 ,  G01R33/5617 ,  G01R33/56316 ,  G01R33/56333 ,  G01R33/56509 ,  G01R33/5673 ,  G01R33/5676

摘要： A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the application of the labeling pulse, and a control unit, the control unit controlling the imaging unit so that the echo signal in the imaging region is collected a plurality of times with variations in the inversion time, the control unit also controlling the imaging unit so that a time ranging from a reference time point within a biological signal obtained from a subject to the application of the labeling pulse is a time determined in accordance with the inversion time.

公开(公告)号：US07821265B2

公开(公告)日：2010-10-26

申请号：US12042099

申请日：2008-03-04

申请人： Reed F. Busse

发明人： Reed F. Busse

IPC分类号： G01V3/00

CPC分类号： A61B5/055 ,  G01R33/4818 ,  G01R33/4822 ,  G01R33/4824 ,  G01R33/485 ,  G01R33/5611 ,  G01R33/5615

摘要： A method for acquiring magnetic resonance (MR) data for a pulse sequence with periodic signal modulation and a set of views having at least two phase encode directions includes selecting a direction of modulation. Each view in the set of views is assigned a readout number based on a position of each view along the direction of modulation resulting in a plurality of readout number groups, each readout number group having a plurality of views. Each view within each readout number group is assigned a train number based on a position of each view along a second direction in k-space. MR data for the set of views is acquired based on the assigned readout number and train number for each view.

摘要翻译： 一种用于获取具有周期性信号调制的脉冲序列的磁共振（MR）数据和具有至少两个相位编码方向的一组视图的方法包括选择调制方向。 根据沿着调制方向的每个视图的位置分配一组视图中的每个视图，导致多个读出数组，每个读出数组具有多个视图。 在每个读出数组中的每个视图被分配有基于k空间中沿着第二方向的每个视图的位置的列车编号。 基于每个视图的分配的读出数和列车编号来获取该组视图的MR数据。

公开(公告)号：US07786729B2

公开(公告)日：2010-08-31

申请号：US11931968

申请日：2007-10-31

申请人： Ryan Chamberlain ,  Jang-Yeon Park ,  Michael G. Garwood

发明人： Ryan Chamberlain ,  Jang-Yeon Park ,  Michael G. Garwood

IPC分类号： G01V3/00

CPC分类号： G01R33/5615 ,  G01R33/4835 ,  G01R33/5616 ,  G01R33/56527 ,  G01R33/56536 ,  G01R33/56554

摘要： A method of magnetic resonance imaging based on rapid acquisition by sequential excitation and refocusing is provided. The method comprises turning on a first time-encoding gradient and applying an excitation pulse in the presence of the first time-encoding gradient. The excitation pulse excites magnetization sequentially along one spatial axis. Thereafter, a first refocusing pulse is applied. A second time-encoding gradient is turned on followed by a second refocusing pulse. A third time-encoding gradient is turned on and a signal is acquired in the presence of the third time-encoding gradient. The third time-encoding gradient sums to zero with the first time-encoding gradient and the second time-encoding gradient for sequential points in space.

摘要翻译： 提供了一种通过顺序激发和重新聚焦快速获取的磁共振成像方法。 该方法包括打开第一时间编码梯度并在第一时间编码梯度的存在下施加激励脉冲。 激励脉冲沿着一个空间轴顺序地激发磁化。 此后，施加第一重聚焦脉冲。 第二次编码梯度被打开，接着是第二重新聚焦脉冲。 第三时间编码梯度被打开，并且在存在第三时间编码梯度的情况下获取信号。 第三时间编码梯度与空间中的连续点的第一时间编码梯度和第二时间编码梯度相加。