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1. 发明申请

US20090270720A1 MAGNETIC RESONANCE IMAGING APPARATUS AND RF PULSE APPLYING METHOD 有权
标题翻译：磁共振成像装置和射频脉冲应用方法
公开(公告)号：US20090270720A1
公开(公告)日：2009-10-29
申请号：US12429033
申请日：2009-04-23
申请人： Yuji Iwadate , Kenichi Kanda , Aki Yamazaki
发明人： Yuji Iwadate , Kenichi Kanda , Aki Yamazaki
IPC分类号： A61B5/055 , G01R33/48
CPC分类号： G01R33/5676 , A61B5/055 , G01R33/543 , G01R33/546
摘要： A magnetic resonance imaging apparatus includes a scan section for executing a navigator sequence which transmits an RF pulse to a subject to obtain each magnetic resonance signal as navigator data. Upon execution of the navigator sequence, the scan section excites both a navigator area having two regions from which intensities of different navigator data signals are obtained, said two regions containing a body-moved region of the subject, and a region different from the two regions simultaneously, and transmits the RF pulse in such a manner that the phase of navigator data obtained from the different region differs from the phase of at least one region of navigator data obtained from the two regions.
摘要翻译：磁共振成像装置包括扫描部分，用于执行导航序列，其将RF脉冲发送到对象以获得每个磁共振信号作为导航器数据。在执行导航器序列时，扫描部分激发具有两个区域的导航区域，从该区域获得不同导航数据信号的强度，所述两个区域包含被摄体的身体移动区域，以及与两个区域不同的区域同时发送RF脉冲，使得从不同区域获得的导航数据的相位与从两个区域获得的导航数据的至少一个区域的相位不同。

2. 发明授权

US09316713B2 Magnetic resonance imaging apparatus and RF pulse for navigator and imaging sequence applying method 有权
标题翻译：用于导航仪和成像序列应用方法的磁共振成像装置和RF脉冲
公开(公告)号：US09316713B2
公开(公告)日：2016-04-19
申请号：US12429033
申请日：2009-04-23
申请人： Yuji Iwadate , Kenichi Kanda , Aki Yamazaki
发明人： Yuji Iwadate , Kenichi Kanda , Aki Yamazaki
IPC分类号： A61B5/055 , G01R33/48 , G01R33/567 , G01R33/54
CPC分类号： G01R33/5676 , A61B5/055 , G01R33/543 , G01R33/546
摘要： A magnetic resonance imaging apparatus includes a scan section for executing a navigator sequence which transmits an RF pulse to a subject to obtain each magnetic resonance signal as navigator data. Upon execution of the navigator sequence, the scan section excites both a navigator area having two regions from which intensities of different navigator data signals are obtained, the two regions containing a body-moved region of the subject, and a region different from the two regions simultaneously, and transmits the RF pulse in such a manner that the phase of navigator data obtained from the different region differs from the phase of at least one region of navigator data obtained from the two regions.
摘要翻译：磁共振成像装置包括扫描部分，用于执行导航序列，其将RF脉冲发送到对象以获得每个磁共振信号作为导航器数据。在执行导航器序列时，扫描部分激励具有两个区域的导航区域，从该区域获得不同导航数据信号的强度，两个区域包含被摄体的身体移动区域，以及与两个区域不同的区域同时发送RF脉冲，使得从不同区域获得的导航数据的相位与从两个区域获得的导航数据的至少一个区域的相位不同。

3. 发明申请

US20080157763A1 MR DATA ACQUISITION METHOD, MR IMAGE CONSTRUCTION METHOD, AND MRI SYSTEM 失效
标题翻译： MR数据采集方法，MR图像构造方法和MRI系统
公开(公告)号：US20080157763A1
公开(公告)日：2008-07-03
申请号：US12049776
申请日：2008-03-17
申请人： Mitsuharu Miyoshi , Aki Yamazaki
发明人： Mitsuharu Miyoshi , Aki Yamazaki
IPC分类号： G01R33/56
CPC分类号： G01R33/4828 , G01R33/5613
摘要： An MR data acquisition method for acquiring data D_φfat according to a steady-state pulse sequence specifying that a phase of an RF pulse is varied in order of 0, 1×φfat, 2×φfat, etc., wherein φfat=(2−TR/T_out+2×m)×π is established on an assumption that m denotes an integer equal to or larger than 0 and meets TR/(2×T_out)−1
摘要翻译：一种MR数据采集方法，用于根据指定RF脉冲的相位以0，1xphifat，2xphifat等的顺序变化的稳态脉冲序列获取数据D_phifat，其中phifat =（2-TR / T_out + 2xm ）xpi是基于m表示等于或大于0并且满足TR /（2xT_out）-1

4. 发明授权

US07365537B2 MR data acquisition method, MR image construction method, and MRI system 失效
标题翻译： MR数据采集方法，MR图像构建方法和MRI系统
公开(公告)号：US07365537B2
公开(公告)日：2008-04-29
申请号：US11049485
申请日：2005-02-01
申请人： Mitsuharu Miyoshi , Aki Yamazaki
发明人： Mitsuharu Miyoshi , Aki Yamazaki
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/5613
摘要： An object of the present invention is to acquire data, which is used to construct a water component-enhanced/fat component-suppressed image, with a repetition time TR set to a desired value. Included are a data acquisition unit and an image construction unit. The data acquisition unit acquires data D_φfat according to a steady-state pulse sequence specifying that the phase of an RF pulse is varied in order of 0, 1×φfat, 2×φfat, etc. Herein, φfat=(2−TR/T_out+2×m)×π is established on the assumption that m denotes an integer equal to or larger than 0 and meets TR/(2×T_out)−1
摘要翻译：本发明的目的是获取用于构建水分量增强/脂肪成分抑制图像的数据，其中重复时间TR设置为期望值。包括数据采集单元和图像构造单元。数据采集单元根据稳态脉冲序列获取数据D_phifat，指定RF脉冲的相位按0，1xphifat，2xphifat等的顺序变化。这里，phifat =（2-TR / T_out + 2xm）xpi 假设m表示等于或大于0并且满足TR /（2xT_out）-1

5. 发明授权

US06720767B2 MRI apparatus 失效
标题翻译： MRI装置
公开(公告)号：US06720767B2
公开(公告)日：2004-04-13
申请号：US10346319
申请日：2003-01-17
申请人： Aki Yamazaki
发明人： Aki Yamazaki
IPC分类号： G01V300
CPC分类号： G01R33/5613 , G01R33/56563
摘要： For the purpose of obtaining an image without band artifacts, in a pulse sequence for conducting data collection in an SSFP state, the phase of an RF pulse &agr; is adjusted to correct the zeroth-order phase offsets of an FID signal and SE/STE signals and a correction pulse for correcting the first-order phase offsets of the FID signal and the SE/STE signals are incorporated into a read axis pulse.
摘要翻译：为了获得没有带伪影的图像，在用于在SSFP状态下进行数据采集的脉冲序列中，调整RF脉冲α的相位以校正FID信号和SE / STE信号的零级相位偏移并且将用于校正FID信号和SE / STE信号的一阶相位偏移的校正脉冲并入读轴脉冲。

6. 发明授权

US07564242B2 MR data acquisition method, MR image construction method, and MRI system 失效
标题翻译： MR数据采集方法，MR图像构建方法和MRI系统
公开(公告)号：US07564242B2
公开(公告)日：2009-07-21
申请号：US12049776
申请日：2008-03-17
申请人： Mitsuharu Miyoshi , Aki Yamazaki
发明人： Mitsuharu Miyoshi , Aki Yamazaki
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/5613
摘要： An MR data acquisition method for acquiring data D_φfat according to a steady-state pulse sequence specifying that a phase of an RF pulse is varied in order of 0, 1×φfat, 2×φfat, etc., wherein φfat=(2−TR/T_out+2×m)×π is established on an assumption that m denotes an integer equal to or larger than 0 and meets TR/(2×T_out)−1
摘要翻译：一种MR数据采集方法，用于根据指定RF脉冲的相位以0，1xphifat，2xphifat等的顺序变化的稳态脉冲序列获取数据D_phifat，其中phifat =（2-TR / T_out + 2xm ）xpi是基于m表示等于或大于0并且满足TR /（2xT_out）-1

7. 发明授权

US06819104B2 Systems and methods for improving quality of images generated by a medical imaging device 失效
标题翻译：用于提高由医学成像装置产生的图像质量的系统和方法
公开(公告)号：US06819104B2
公开(公告)日：2004-11-16
申请号：US10176225
申请日：2002-06-20
申请人： Aki Yamazaki , Yoshihiro Oda , Naotaka Adachi
发明人： Aki Yamazaki , Yoshihiro Oda , Naotaka Adachi
IPC分类号： G01V300
CPC分类号： G01R33/5613
摘要： An object of the present invention is to produce images devoid of band artifacts. Data acquisition in SSFP is repeated N times (where N denotes the power of 2) in order to acquire data fv(k), which ranges from data fv(0) to data fv(N−1), from views v constituting a k-space. At this time, the phase of an RF pulse is varied based on an expression of 360°·v·k/N. If an operator designates Fourier transform imaging, a Fourier transform is performed on data fv(k) relative to each of the phases indicated by the RF pulse in order to produce data Fv(n). If the operator does not designate Fourier transform imaging, the data fv(k) is regarded as the data Fv(n) as it is. Any of at least either of weighted addition and MIP processing and root-mean-square conversion selected by the operator is then performed on the data Fv(n) in order to produce data Av. An image is reconstructed based on the data Av.
摘要翻译：本发明的目的是产生没有带状伪影的图像。为了获取从数据fv（0）到数据fv（N-1）的数据fv（k），从构成k的视图v重复NFP中的数据采集（其中N表示2的幂）N次 -空间。此时，RF脉冲的相位根据360°·V·k / N的表达而变化。如果操作者指定傅里叶变换成像，则对于由RF脉冲指示的每个相位的数据fv（k）执行傅里叶变换，以产生数据Fv（n）。如果操作者不指定傅立叶变换成像，则将数据fv（k）视为数据Fv（n）。然后对数据Fv（n）执行由操作者选择的加权相加和MIP处理和均方根转换中的至少一个，以产生数据Av。基于数据Av重建图像。

8. 发明授权

US06472873B2 Method and apparatus for capturing magnetic resonance signals, recording medium and system for magnetic resonance imaging using the same 失效
标题翻译：用于捕获磁共振信号的方法和装置，记录介质和使用其的磁共振成像系统
公开(公告)号：US06472873B2
公开(公告)日：2002-10-29
申请号：US09911961
申请日：2001-07-24
申请人： Aki Yamazaki
发明人： Aki Yamazaki
IPC分类号： G01V300
CPC分类号： G01R33/56518
摘要： The present invention provides selective excitation of a slab by RF signals of frequency compensated for in response to the error in the gradient magnetic field in the slice axis direction and phase encoding in the slice axis direction with the phase compensated for corresponding to the corrected frequency, in order to capture appropriate magnetic resonance signals in three dimensional scanning when there is an error in the slice gradient.
摘要翻译：本发明通过响应于在切片轴方向的梯度磁场中的误差和针对切片轴方向的相位编码的频率补偿的RF信号来提供平板的选择性激励，相位补偿相应于校正频率，以便在切片梯度中存在误差时，在三维扫描中捕获适当的磁共振信号。

9. 发明申请

US20060116569A1 Phase error measuring method, MR imaging method, and MRI system 失效
标题翻译：相位误差测量方法，MR成像方法和MRI系统
公开(公告)号：US20060116569A1
公开(公告)日：2006-06-01
申请号：US11290750
申请日：2005-11-30
申请人： Aki Yamazaki
发明人： Aki Yamazaki
IPC分类号： A61B5/05
CPC分类号： G01R33/565 , G01R33/4824 , G01R33/561
摘要： The present invention is intended to provide a phase error measuring method capable of measuring a phase error occurring in each phase encoding direction that corresponds to the direction of a readout magnetic field gradient which is turned in units of a radian. The phase error measuring method in accordance with the present invention is implemented in a magnetic resonance imaging (MRI) apparatus that performs a K-space filling scan to define data in a K-space having readout lines formed along a Kx axis, a Ky axis, and a mixed axis of them. The phase error measuring method includes a plurality of phase error measurement steps of measuring a phase error that occurs in each phase encoding direction corresponding to the direction of a readout magnetic field gradient which is turned in units of a radian.
摘要翻译：本发明旨在提供一种相位误差测量方法，该方法能够测量与以弧度为单位转换的读出磁场梯度的方向相对应的每个相位编码方向上产生的相位误差。根据本发明的相位误差测量方法在磁共振成像（MRI）装置中实现，所述磁共振成像（MRI）装置执行K空间填充扫描以在K空间中定义具有沿Kx轴，Ky轴，和它们的混合轴。相位误差测量方法包括多个相位误差测量步骤，用于测量与以弧度为单位转换的读出磁场梯度的方向相对应的每个相位编码方向上发生的相位误差。

10. 发明申请

US20050179432A1 MR data acquisition method, MR image construction method, and MRI system 失效
标题翻译： MR数据采集方法，MR图像构建方法和MRI系统
公开(公告)号：US20050179432A1
公开(公告)日：2005-08-18
申请号：US11049485
申请日：2005-02-01
申请人： Mitsuharu Miyoshi , Aki Yamazaki
发明人： Mitsuharu Miyoshi , Aki Yamazaki
IPC分类号： G01R33/48 , A61B5/055 , G01R33/54 , G01R33/561 , G01V3/00
CPC分类号： G01R33/4828 , G01R33/5613
摘要： An object of the present invention is to acquire data, which is used to construct a water component-enhanced/fat component-suppressed image, with a repetition time TR set to a desired value. Included are a data acquisition unit and an image construction unit. The data acquisition unit acquires data D_φfat according to a steady-state pulse sequence specifying that the phase of an RF pulse is varied in order of 0, 1×φfat, 2×φfat, etc. Herein, φfat=(2−TR/T_out+2×m)×π is established on the assumption that m denotes an integer equal to or larger than 0 and meets TR/(2×T_out)−1
摘要翻译：本发明的目的是获取用于构建水分量增强/脂肪成分抑制图像的数据，其中重复时间TR设置为期望值。包括数据采集单元和图像构造单元。数据采集单元根据稳态脉冲序列获取数据D_phifat，指定RF脉冲的相位按0，1xphifat，2xphifat等的顺序变化。这里，phifat =（2-TR / T_out + 2xm）xpi 假设m表示等于或大于0并且满足TR /（2xT_out）-1

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