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1. 发明授权

US06700375B2 MRI method and apparatus using independent gradient magnetic field spolier pulses 有权
标题翻译： MRI方法和装置采用独立梯度磁场spolier脉冲
公开(公告)号：US06700375B2
公开(公告)日：2004-03-02
申请号：US09734897
申请日：2000-12-13
申请人： Yoshio Machida , Satoshi Sugiura , Yoshimori Kassai
发明人： Yoshio Machida , Satoshi Sugiura , Yoshimori Kassai
IPC分类号： G01V300
CPC分类号： G01R33/5615 , G01R33/5617
摘要： In fast imaging of a multi-echo method represented by a fast spin echo (FSE) method, a pulse sequence is arranged such that a basic condition relating to a CPMG method is satisfied and a spoiler gradient magnetic field pulse is independently applied immediately after a flop pulse. The spoiler gradient magnetic field pulse for suppressing an undesired signal is applied by a predetermined amount or more so as to prevent superimposition of other gradient magnetic field components such as a phase encoding component, a rewind component, etc., and to prevent a residual component of an FID signal caused by a certain RF pulse from being refocused by a subsequent RF pulse.
摘要翻译：在由快速自旋回波（FSE）方法表示的多回波方法的快速成像中，布置脉冲序列，使得满足与CPMG方法相关的基本条件，并且扰流板梯度磁场脉冲在a 触发脉冲。用于抑制不期望信号的扰流板梯度磁场脉冲施加预定量以上，以防止诸如相位编码分量，倒带分量等的其它梯度磁场分量的叠加，并且防止残留分量由一定RF脉冲引起的由后续RF脉冲重新聚焦的FID信号。

2. 发明授权

US07026818B2 Parallel MR imaging with use of multi-coil made of plural element coils 有权
公开(公告)号：US07026818B2
公开(公告)日：2006-04-11
申请号：US10317214
申请日：2002-12-12
申请人： Yoshio Machida , Yoshinori Hamamura , Yoshimori Kassai , Kazuya Okamoto , Kazuhiro Soma
发明人： Yoshio Machida , Yoshinori Hamamura , Yoshimori Kassai , Kazuya Okamoto , Kazuhiro Soma
IPC分类号： G01V3/00
CPC分类号： G01R33/3664 , G01R33/3415 , G01R33/5611
摘要： A magnetic resonance imaging system includes an MR signal reception apparatus comprising a receiving multi-coil and a switchover member. The receiving multi-coil receives MR signals and is composed of a plurality of element coils. The switchover member is configured to switch reception states of the MR signals received by the plurality of element coils in response to imaging conditions. The switchover member connects output paths of the MR signals from the plurality of element coils to a receiver, to reception channels in the receiver in response to the imaging conditions. The reception channels is less in number than the element coils. The imaging conditions are for example directed to parallel MR imaging.

3. 发明申请

US20090182222A1 MAGNETIC RESONANCE IMAGING APPATATUS AND IMAGE RECONSTRUCTION METHOD 审中-公开
标题翻译：磁共振成像装置和图像重建方法
公开(公告)号：US20090182222A1
公开(公告)日：2009-07-16
申请号：US12349648
申请日：2009-01-07
申请人： Yoshio MACHIDA , Yoshimori Kassai
发明人： Yoshio MACHIDA , Yoshimori Kassai
IPC分类号： A61B5/055
CPC分类号： G01R33/565 , G01R33/482 , G01R33/5608 , G01R33/561 , G01R33/56545
摘要： In a calculator system of a magnetic resonance imaging apparatus, a filter setting unit sets a shape of a filter superimposed on k-space data to match a shape of a data collecting area in a k-space. A filter processing unit performs a filtering process on the k-space data using the filter of which the shape is set.
摘要翻译：在磁共振成像装置的计算器系统中，滤波器设定单元设置叠加在k空间数据上的滤波器的形状，以匹配k空间中的数据收集区域的形状。滤波处理单元使用设定了形状的滤波器对k空间数据进行滤波处理。

4. 发明申请

US20060087320A1 Parallel MR imaging with use of multi-coil made of plural element coils 有权
公开(公告)号：US20060087320A1
公开(公告)日：2006-04-27
申请号：US11250490
申请日：2005-10-17
申请人： Yoshio Machida , Yoshinori Hamamura , Yoshimori Kassai , Kazuya Okamoto , Kazuhiro Soma
发明人： Yoshio Machida , Yoshinori Hamamura , Yoshimori Kassai , Kazuya Okamoto , Kazuhiro Soma
IPC分类号： G01V3/00
CPC分类号： G01R33/3664 , G01R33/3415 , G01R33/5611
摘要： A magnetic resonance imaging system includes an MR signal reception apparatus comprising a receiving multi-coil and a switchover member. The receiving multi-coil receives MR signals and is composed of a plurality of element coils. The switchover member is configured to switch reception states of the MR signals received by the plurality of element coils in response to imaging conditions. The switchover member connects output paths of the MR signals from the plurality of element coils to a receiver, to reception channels in the receiver in response to the imaging conditions. The reception channels is less in number than the element coils. The imaging conditions are for example directed to parallel MR imaging.

5. 发明授权

US07176689B2 Parallel MR imaging with use of multi-coil made of plural element coils 有权
标题翻译：使用由多个元件线圈制成的多线圈的并行MR成像
公开(公告)号：US07176689B2
公开(公告)日：2007-02-13
申请号：US11250490
申请日：2005-10-17
申请人： Yoshio Machida , Yoshinori Hamamura , Yoshimori Kassai , Kazuya Okamoto , Kazuhiro Soma
发明人： Yoshio Machida , Yoshinori Hamamura , Yoshimori Kassai , Kazuya Okamoto , Kazuhiro Soma
IPC分类号： G01V3/00
CPC分类号： G01R33/3664 , G01R33/3415 , G01R33/5611
摘要： A magnetic resonance imaging system includes an MR signal reception apparatus comprising a receiving multi-coil and a switchover member. The receiving multi-coil receives MR signals and is composed of a plurality of element coils. The switchover member is configured to switch reception states of the MR signals received by the plurality of element coils in response to imaging conditions. The switchover member connects output paths of the MR signals from the plurality of element coils to a receiver, to reception channels in the receiver in response to the imaging conditions. The reception channels is less in number than the element coils. The imaging conditions are for example directed to parallel MR imaging.
摘要翻译：磁共振成像系统包括包括接收多线圈和切换构件的MR信号接收装置。接收多线圈接收MR信号并且由多个元件线圈组成。切换构件被配置为响应于成像条件来切换由多个元件线圈接收的MR信号的接收状态。切换构件将来自多个元件线圈的MR信号的输出路径连接到接收器，以响应于成像条件而将接收器中的接收通道连接。接收通道数量少于元件线圈。成像条件例如针对并行MR成像。

6. 发明授权

US08560049B2 Magnetic resonance imaging system 有权
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.

7. 发明授权

US08131338B2 MR imaging providing tissue/blood contrast image 有权
标题翻译： MR成像提供组织/血液对比图像
公开(公告)号：US08131338B2
公开(公告)日：2012-03-06
申请号：US11819655
申请日：2007-06-28
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 includes an ECG detector for the patient object being imaged and an element for performing an MRI pulse sequence. An imaging unit defined by the pulse sequence is longer in temporal length than one heart beat represented by the ECG signal. An MR signal is acquired from the object in response to the pulse sequence and an MR image based on the acquired MR signal is produced. A plurality of divided MT pulses can be applied instead of the conventional single MT pulse. In this case, an SE-system pulse sequence having a shorter echo train spacing is used, to generate sounds by applying gradient pulses incorporated in an imaging pulse sequence so as to automatically instruct a patient to perform an intermittent breath hold during three-dimensional scanning.
摘要翻译：磁共振成像（MRI）系统包括用于被成像的患者物体的ECG检测器和用于执行MRI脉冲序列的元件。由脉冲序列定义的成像单元在时间长度上比由ECG信号表示的一个心跳更长。响应于脉冲序列从对象获取MR信号，并且产生基于所获取的MR信号的MR图像。可以应用多个划分的MT脉冲来代替传统的单个MT脉冲。在这种情况下，使用具有更短回波串间距的SE系统脉冲序列，通过应用结合在成像脉冲序列中的梯度脉冲来产生声音，以便在三维扫描期间自动指示患者执行间歇性呼吸。

8. 发明申请

US20070265522A1 MR imaging providing tissue/blood contrast image 有权
标题翻译： MR成像提供组织/血液对比图像
公开(公告)号：US20070265522A1
公开(公告)日：2007-11-15
申请号：US11819655
申请日：2007-06-28
申请人： Yoshimori Kassai , Mitsue Miyazaki , Satoshi Sugiura
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 includes an ECG detector for the patient object being imaged and an element for performing an MRI pulse sequence. An imaging unit defined by the pulse sequence is longer in temporal length than one heart beat represented by the ECG signal. An MR signal is acquired from the object in response to the pulse sequence and an MR image based on the acquired MR signal is produced. A plurality of divided MT pulses can be applied instead of the conventional single MT pulse. In this case, an SE-system pulse sequence having a shorter echo train spacing is used, to generate sounds by applying gradient pulses incorporated in an imaging pulse sequence so as to automatically instruct a patient to perform an intermittent breath hold during three-dimensional scanning.
摘要翻译：磁共振成像（MRI）系统包括用于被成像的患者物体的ECG检测器和用于执行MRI脉冲序列的元件。由脉冲序列定义的成像单元在时间长度上比由ECG信号表示的一个心跳更长。响应于脉冲序列从对象获取MR信号，并且产生基于获取的MR信号的MR图像。可以应用多个划分的MT脉冲来代替传统的单个MT脉冲。在这种情况下，使用具有更短回波串间距的SE系统脉冲序列，通过应用结合在成像脉冲序列中的梯度脉冲来产生声音，以便在三维扫描期间自动指示患者执行间歇性呼吸。

9. 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。

10. 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。

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