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1. 发明申请

US20120146640A1 MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD 有权
标题翻译：磁共振成像装置和磁共振成像方法
公开(公告)号：US20120146640A1
公开(公告)日：2012-06-14
申请号：US13320766
申请日：2011-08-02
申请人： Hiroshi Kusahara , Yoshimori Kassai , Yutaka Machii
发明人： Hiroshi Kusahara , Yoshimori Kassai , Yutaka Machii
IPC分类号： G01R33/48
CPC分类号： G01R33/5616 , G01R33/56554
摘要： According to one embodiment, an MRI apparatus (20) includes a first acquisition unit, a second acquisition unit and a correction unit (100). The first and second acquisition units produce a plurality of echo signals by performing echo signal acquisition sequence of EPI including application of a gradient magnetic field in a phase encoding direction, and acquire the plurality of echo signals as first and second template data, respectively. The second acquisition unit acquires the second template data under a sequence in which start timing of application of a gradient magnetic field in a readout direction is shifted from the case where acquisition of the first template data is performed. The correction unit (100) corrects phase error included in the echo signals by using the first and second template data.
摘要翻译：根据一个实施例，MRI装置（20）包括第一获取单元，第二获取单元和校正单元（100）。第一和第二采集单元通过执行包括在相位编码方向上施加梯度磁场的EPI的回波信号获取序列来产生多个回波信号，并分别获取多个回波信号作为第一和第二模板数据。第二获取单元从执行读取方向的倾斜磁场的开始定时与执行第一模板数据的获取的情况相移的顺序获取第二模板数据。校正单元（100）通过使用第一和第二模板数据来校正包含在回波信号中的相位误差。

2. 发明授权

US08890525B2 Magnetic resonance imaging apparatus and magnetic resonance imaging method 有权
标题翻译：磁共振成像装置和磁共振成像方法
公开(公告)号：US08890525B2
公开(公告)日：2014-11-18
申请号：US13320766
申请日：2011-08-02
申请人： Hiroshi Kusahara , Yoshimori Kassai , Yutaka Machii
发明人： Hiroshi Kusahara , Yoshimori Kassai , Yutaka Machii
IPC分类号： G01V3/00 , G01R33/561 , G01R33/565
CPC分类号： G01R33/5616 , G01R33/56554
摘要： An MRI apparatus produces a plurality of echo signals by performing an EPI echo signal acquisition sequence including gradient magnetic fields in a phase encoding direction, and acquires a plurality of echo signals as first and second template data, respectively. The second template data is acquired using a sequence in which start timing of a gradient magnetic field in a readout direction is shifted from the case where acquisition of the first template data is performed. The phase error included in the echo signals is corrected by using the first and second template data.
摘要翻译： MRI装置通过执行包括相位编码方向上的梯度磁场的EPI回波信号获取序列来产生多个回波信号，并且分别获取多个回波信号作为第一和第二模板数据。使用其中执行读取方向上的梯度磁场的开始定时与执行第一模板数据的获取的情况相移的顺序来获取第二模板数据。通过使用第一和第二模板数据来校正回波信号中包括的相位误差。

3. 发明授权

US08581581B2 Magnetic resonance imaging apparatus and magnetic resonance imaging method 有权
标题翻译：磁共振成像装置和磁共振成像方法
公开(公告)号：US08581581B2
公开(公告)日：2013-11-12
申请号：US13623920
申请日：2012-09-21
申请人： Yutaka Machii , Hiroshi Kusahara , Yoshimori Kassai
发明人： Yutaka Machii , Hiroshi Kusahara , Yoshimori Kassai
IPC分类号： G01V3/00
CPC分类号： G01R33/56341 , A61B5/055 , A61B5/7203 , G01R33/5616 , G01R33/56509 , G01R33/56518
摘要： According to one embodiment, a magnetic resonance imaging apparatus includes an imaging unit and a strain correction unit. The imaging unit is configured to acquire frames of diffusion weighted image data corresponding to different b-values by diffusion weighted imaging with applying MPG pulses corresponding to the different b-values of which application axes are same. The strain correction unit is configured to calculate a strain correction coefficient for diffusion weighted image data to be a target of a strain correction based on diffusion weighted image data corresponding to a b-value different from a b-value corresponding to the diffusion weighted image data to be the target of the strain correction among the frames of the diffusion weighted image data to generate image data after the strain correction by the strain correction of the diffusion weighted image data to be the target of the strain correction using the calculated strain correction coefficient.
摘要翻译：根据一个实施例，磁共振成像装置包括成像单元和应变校正单元。成像单元被配置为通过扩散加权成像来获取与不同b值对应的扩散加权图像数据的帧，其中应用与应用轴相同的不同b值对应的MPG脉冲。应变校正单元被配置为基于与对应于扩散加权图像数据的b值不同的b值的扩散加权图像数据来计算扩散加权图像数据的应变校正系数，作为应变校正的目标作为扩散加权图像数据的帧之间的应变校正的目标，以通过利用计算的应变校正系数将扩散加权图像数据的应变校正作为应变校正的目标来生成应变校正后的图像数据。

4. 发明申请

US20130009641A1 MAGNETIC RESONANCE IMAGING APPARATUS AND CONTROL DEVICE OF A MAGNETIC RESONANCE IMAGING APPARATUS 有权
标题翻译：磁共振成像装置的磁共振成像装置和控制装置
公开(公告)号：US20130009641A1
公开(公告)日：2013-01-10
申请号：US13615891
申请日：2012-09-14
申请人： Masashi HORI , Motohiro Miura , Hiroshi Kusahara , Yutaka Machii , Yoshimori Kassai
发明人： Masashi HORI , Motohiro Miura , Hiroshi Kusahara , Yutaka Machii , Yoshimori Kassai
IPC分类号： G01R33/48
CPC分类号： G01R33/54 , G01R33/3852 , G01R33/4818 , G01R33/56545 , G01R33/56554 , G01R33/56572
摘要： According to one embodiment, a control device (30) of a magnetic resonance imaging apparatus (20A) includes a condition setting unit (100) and a judging unit (102). The condition setting unit sets an imaging sequence performed by the magnetic resonance imaging apparatus based on conditions of the imaging sequence. The judging unit calculates a value of electric current supplied to a gradient magnetic field coil (26) of the magnetic resonance imaging apparatus based on the conditions of the imaging sequence, calculates a value of voltage applied to the gradient magnetic field coil based on “a mutual inductance by which the gradient magnetic field coil causes mutual induction” so that electric current flowing the gradient magnetic field coil becomes equal to the value of electric current calculated, and judges whether the imaging sequence is practicable or not based on the value of voltage.
摘要翻译：根据一个实施例，磁共振成像设备（20A）的控制设备（30）包括条件设置单元（100）和判断单元（102）。条件设定单元基于成像序列的条件设定由磁共振成像装置执行的成像序列。判断单元根据摄像顺序的条件，计算供给到磁共振成像装置的倾斜磁场线圈（26）的电流值，根据相互的关系计算施加到倾斜磁场线圈的电压值电感，梯度磁场线圈引起相互感应，使得流过梯度磁场线圈的电流等于计算出的电流值，并根据电压值判断摄像顺序是否可行。

5. 发明授权

US09301704B2 Magnetic resonance imaging system for non-contrast MRA and magnetic resonance signal acquisition method employed by the same 有权
标题翻译：磁共振成像系统用于非对比MRA和磁共振信号采集方法
公开(公告)号：US09301704B2
公开(公告)日：2016-04-05
申请号：US11090852
申请日：2005-03-25
申请人： Hiroshi Takai , Yoshimori Kassai
发明人： Hiroshi Takai , Yoshimori Kassai
IPC分类号： A61B5/05 , A61B5/055
CPC分类号： A61B5/055
摘要： A magnetic resonance imaging system uses a first RF coil for acquiring a magnetic resonance signal from a subject, and a device for estimating a cardiac phase of the subject based on the magnetic resonance signal acquired by the first RF coil. The first RF coil, for example, can be an RF coil exclusive to cardiac phase estimation. The magnetic resonance imaging system also uses a second RF coil for acquiring a magnetic resonance signal based on the estimated cardiac phase, and a device for reconstructing a magnetic resonance image of the subject based on the magnetic resonance signal acquired by the second RF coil. Thus, MRA can be performed by estimating a cardiac phase.
摘要翻译：磁共振成像系统使用第一RF线圈来获取来自对象的磁共振信号，以及用于基于由第一RF线圈获取的磁共振信号估计对象的心脏相位的装置。例如，第一RF线圈可以是专用于心脏相位估计的RF线圈。磁共振成像系统还使用第二RF线圈来基于估计的心脏相位获取磁共振信号，以及用于基于由第二RF线圈获取的磁共振信号重建对象的磁共振图像的装置。因此，可以通过估计心脏相位来执行MRA。

6. 发明授权

US07920911B2 Interventional MR imaging with detection and display of device position 有权
标题翻译：介入MR成像检测和显示器件位置
公开(公告)号：US07920911B2
公开(公告)日：2011-04-05
申请号：US11208517
申请日：2005-08-23
申请人： Tsutomu Hoshino , Shigehide Kuhara , Hitoshi Yamagata , Yoshimori Kassai
发明人： Tsutomu Hoshino , Shigehide Kuhara , Hitoshi Yamagata , Yoshimori Kassai
IPC分类号： A61B5/05
CPC分类号： G01R33/287
摘要： A magnetic resonance imaging system for interventional MR imaging involves operations to insert a device such as a catheter into an object. According to the system, a tip position of the catheter is detected, data indicative of moved loci of the catheter are produced from data indicative of the detected tip position, and the produced movement locus data are displayed. In addition, even when an operator changes the progress direction of the device such as a puncture needle, an imaging cross-section automatically tracks movements of the device. Appropriate preoperative planning is also provided.
摘要翻译：用于介入MR成像的磁共振成像系统涉及将诸如导管的装置插入物体的操作。根据该系统，检测导管的尖端位置，从表示检测到的尖端位置的数据产生表示导管的移动轨迹的数据，并显示所产生的运动轨迹数据。此外，即使操作者改变诸如穿刺针的装置的进行方向，成像横截面自动跟踪装置的移动。还提供了适当的术前规划。

7. 发明授权

US07620662B2 MRI system center and MRI system 有权
标题翻译： MRI系统中心和MRI系统
公开(公告)号：US07620662B2
公开(公告)日：2009-11-17
申请号：US09959793
申请日：2001-11-07
申请人： Yoshimori Kassai , Naoki Sasaki
发明人： Yoshimori Kassai , Naoki Sasaki
IPC分类号： G06F12/00 , G06F17/30
CPC分类号： G01R33/546 , A61B5/0013 , A61B5/055 , G01R33/28 , G01R33/54 , G06F11/3476 , G06F19/00 , G06F19/321 , G06F19/3418 , G06Q10/06 , G16H40/20 , Y10S707/99931 , Y10S707/99954
摘要： An MRI system center is connected to a plurality of MRI systems for visualizing the interior of a subject to be examined using a magnetic resonance phenomenon, through an electronic communication line. The MRI system center receives data of a log file on which a use state of the MRI systems is recorded or use-state data extracted from the log file, from the MRI systems through a communication control unit. A database unit stores the data of the log file or the use-state data. An analysis unit analyzes the data of the log file or the use-state data received within a given period of time.
摘要翻译： MRI系统中心连接到多个MRI系统，用于通过电子通信线路使用磁共振现象可视化待检查对象的内部。 MRI系统中心从MRI系统通过通信控制单元接收记录有MRI系统的使用状态的日志文件的数据或从日志文件中提取的使用状态数据。数据库单元存储日志文件或使用状态数据的数据。分析单元分析日志文件的数据或在给定时间段内接收到的使用状态数据。

8. 发明授权

US07365543B2 Magnetic resonance imaging apparatus and magnetic resonance imaging method 有权
标题翻译：磁共振成像装置和磁共振成像方法
公开(公告)号：US07365543B2
公开(公告)日：2008-04-29
申请号：US11699325
申请日：2007-01-30
申请人： Masao Yui , Yoshimori Kassai , Shigehide Kuhara
发明人： Masao Yui , Yoshimori Kassai , Shigehide Kuhara
IPC分类号： G01V3/00
CPC分类号： G01R33/56509 , G01R33/546 , G01R33/5614 , G01R33/5635 , G01R33/56518 , G01R33/5676
摘要： An MRI apparatus includes an imaging signal acquisition unit, a motion signal acquisition unit, a motion amount determination unit, a motion correction unit and an image reconstruction unit. The imaging signal acquisition unit acquires MR signals as imaging signals. The motion signal acquisition unit repetitively acquires MR signals having PE amount less than that of the imaging signals as motion signals. The motion amount determination unit obtains a motion amount using the motion signals. The motion correction unit performs correction processing of the imaging signals in accordance with the motion amount. The image reconstruction unit reconstructs an image using the imaging signals after the correction processing.
摘要翻译： MRI装置包括成像信号获取单元，运动信号获取单元，运动量确定单元，运动校正单元和图像重建单元。成像信号获取单元获取MR信号作为成像信号。运动信号获取单元重复获取具有小于成像信号的PE量的MR信号作为运动信号。运动量确定单元使用运动信号获得运动量。运动校正单元根据运动量进行摄像信号的校正处理。图像重建单元使用校正处理之后的成像信号来重建图像。

9. 发明申请

US20060058633A1 Interventional MR imaging with detection and display of device position 有权
标题翻译：介入MR成像检测和显示器件位置
公开(公告)号：US20060058633A1
公开(公告)日：2006-03-16
申请号：US11208517
申请日：2005-08-23
申请人： Tsutomu Hoshino , Shigehide Kuhara , Hitoshi Yamagata , Yoshimori Kassai
发明人： Tsutomu Hoshino , Shigehide Kuhara , Hitoshi Yamagata , Yoshimori Kassai
IPC分类号： A61B5/05
CPC分类号： G01R33/287
摘要： A magnetic resonance imaging system for interventional MR imaging involves operations to insert a device such as a catheter into an object. According to the system, a tip position of the catheter is detected, data indicative of moved loci of the catheter are produced from data indicative of the detected tip position, and the produced movement locus data are displayed. In addition, even when an operator changes the progress direction of the device such as a puncture needle, an imaging cross-section automatically tracks movements of the device. Appropriate preoperative planning is also provided.
摘要翻译：用于介入MR成像的磁共振成像系统涉及将诸如导管的装置插入物体的操作。根据该系统，检测出导管的尖端位置，从表示检测到的尖端位置的数据产生表示导管的移动轨迹的数据，并且显示所产生的运动轨迹数据。此外，即使操作者改变诸如穿刺针的装置的进行方向，成像横截面自动跟踪装置的移动。还提供了适当的术前规划。

10. 发明授权

US06850793B1 MR imaging using nested pulse sequence involving IR pulse 失效
标题翻译：使用涉及IR脉冲的嵌套脉冲序列的MR成像
公开(公告)号：US06850793B1
公开(公告)日：2005-02-01
申请号：US09262873
申请日：1999-03-02
申请人： Mitsue Miyazaki , Yoshimori Kassai
发明人： Mitsue Miyazaki , Yoshimori Kassai
IPC分类号： G01R33/54 , A61B5/055
CPC分类号： G01R33/54
摘要： In addition to the known MT (magnetization transfer) effect, an RMT (reverse MT) is newly found, which increases a detected MR signal strength. Both the MT and RMT effects can be explained with mutual interaction, such as phenomena of chemical exchange and/or cross relaxation, acted between a pool of water proton spins and another pool of macromolecule proton spins, for example, within an object. In order to enhance the MT or RMT effect, the frequency bandwidths of RF pulses, such as a 90° RF exciting pulse in a SE or FSE method, an inversion pulse in a FLAIR or fast FLAIR method, and others, are controlled. To enhance the MT effect, the bandwidth is controlled into a wider value (approx. more than 1250 Hz) than the normally (conventionally) used bandwidth, while to obtain the RMT effect, the bandwidth is controlled into a narrower value (approx. less than 1000 Hz) than the normally used bandwidth. Actively controlling the MT or RMT effect permits changed image contrast in MR imaging.
摘要翻译：除了已知的MT（磁化传递）效应之外，新发现RMT（反向MT），这增加了检测到的MR信号强度。 MT和RMT效应都可以通过相互作用（例如化学交换和/或交叉松弛的现象）来解释，这些现象在水质子旋转池和另一个大分子质子自旋池之间起作用，例如在物体内。为了提高MT或RMT效应，控制RF脉冲的频率带宽，例如SE或FSE方法中的90°RF激励脉冲，FLAIR或快速FLAIR方法中的反转脉冲等。为了提高MT效应，带宽被控制在比正常（常规）使用的带宽更宽的值（大于1250Hz）的同时，为了获得RMT效应，带宽被控制在较小的值（大约少于超过1000 Hz）比正常使用的带宽。积极控制MT或RMT效果可以改善MR成像中的图像对比度。

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