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1. 发明授权

US07852076B2 Magnetic resonance apparatus utilizing time-varying rate of magnetic resonant frequency 失效
标题翻译：磁共振装置利用磁共振频率的时变速率
公开(公告)号：US07852076B2
公开(公告)日：2010-12-14
申请号：US12423431
申请日：2009-04-14
申请人： Satoshi Hirata , Hisaaki Ochi , Yo Taniguchi , Tetsuhiko Takahashi , Hiroyuki Takeuchi
发明人： Satoshi Hirata , Hisaaki Ochi , Yo Taniguchi , Tetsuhiko Takahashi , Hiroyuki Takeuchi
IPC分类号： G01V3/00
CPC分类号： A61B5/411 , A61B5/0037 , A61B5/055 , A61B5/415 , A61B5/416 , A61B5/418 , A61B5/7257 , G01R33/389 , G01R33/485
摘要： The present invention provides a magnetic resonance imaging system capable of performing spectrum measurement even when a magnetic resonant frequency changes during MRS measurement. A time-varying rate of a water magnetic resonant frequency is measured in advance before the MRS measurement. The amount of change in water magnetic resonant frequency during the MRS measurement is predicted from the measured time-varying rate. With the predicted value as the reference, a transmission frequency of an RF magnetic field irradiated in a signal suppression pulse sequence, a transmission frequency of an RF magnetic field for excitation and inversion and a received frequency at the detection of a magnetic resonance signal in a sequence of the MRS measurement are respectively set. A high-precision spectrum measurement is hence enabled.
摘要翻译：本发明提供一种磁共振成像系统，即使MRS测量期间磁共振频率发生变化，也能进行光谱测量。在MRS测量之前，预先测量水磁共振频率的时变速率。 MRS测量期间水磁共振频率的变化量根据测量的时变速率预测。以预测值为参考，在信号抑制脉冲序列中照射的RF磁场的传输频率，用于激励和反转的RF磁场的传输频率和在检测磁共振信号中的接收频率分别设置MRS测量的顺序。因此，能够进行高精度的频谱测量。

2. 发明申请

US20080231272A1 Magnetic Resonance Imager 有权
标题翻译：磁共振成像仪
公开(公告)号：US20080231272A1
公开(公告)日：2008-09-25
申请号：US10586732
申请日：2004-12-24
申请人： Yo Taniguchi , Shinji Kurokawa , Hisaaki Ochi
发明人： Yo Taniguchi , Shinji Kurokawa , Hisaaki Ochi
IPC分类号： G01R33/54
CPC分类号： G01R33/561 , G01R33/4818 , G01R33/4824 , G01R33/565 , G01R33/56509
摘要： Provided is a magnetic resonance imager capable of efficiently suppressing artifacts in radial scanning that is short of the number of echoes.Part of unmeasured echoes is measured as a reference echo. An estimation coefficient is calculated using echoes adjoining the reference echo, and used to estimate the unmeasured echoes.
摘要翻译：提供一种能够有效地抑制径向扫描中的伪像不足回波数的磁共振成像器。测量部分未测量的回波作为参考回波。使用与参考回波相邻的回波计算估计系数，并用于估计未测量的回波。

3. 发明授权

US5808467A RF probe and inspection system using NMR using the same 失效
标题翻译：射频探头和使用核磁共振的检查系统
公开(公告)号：US5808467A
公开(公告)日：1998-09-15
申请号：US653315
申请日：1996-05-24
申请人： Hisaaki Ochi , Yo Taniguchi , Kenichi Okajima , Yoshitaka Bito , Etsuji Yamamoto
发明人： Hisaaki Ochi , Yo Taniguchi , Kenichi Okajima , Yoshitaka Bito , Etsuji Yamamoto
IPC分类号： G01R33/3415 , G01V3/00
CPC分类号： G01R33/3415
摘要： In the inspection system using nuclear magnetic resonance comprising magnetic field generators such as a static magnetic field, a gradient magnetic field, and an RF magnetic field, an RF probe for detecting an NMR signal from a subject, and a calculator for operating a detected signal by the RF probe, a RF probe for detection comprises a plurality of coils arranged in the predetermined direction and includes a plurality of switching elements and the inspection system selects two or more coils from the plurality of coils for each measurement of NMR signals, turns the switching elements connected to the selected coils ON, turns the switching elements connected to coils other than the selected coils OFF, changes a combination of two or more coils for each measurement of NMR signals, and changes the sensitivity distribution of the RF probe in the predetermined direction according to the Wavelet basis function for each measurement of NMR signals.
摘要翻译：在使用包括诸如静磁场，梯度磁场和RF磁场的磁场发生器的核磁共振的检查系统中，用于检测来自被检体的NMR信号的RF探针和用于操作检测信号的计算器通过RF探头，用于检测的RF探针包括沿预定方向布置的多个线圈，并且包括多个开关元件，并且检查系统从每个测量NMR信号中选择来自多个线圈的两个或更多个线圈，连接到所选择的线圈的开关元件接通，将与所选线圈以外的线圈相连的开关元件断开，对每个NMR信号的测量改变两个或更多个线圈的组合，并将RF探针的灵敏度分布改变为预定的根据每个NMR信号测量的小波基函数的方向。

4. 发明授权

US08030924B2 Magnetic resonance imaging system 有权
标题翻译：磁共振成像系统
公开(公告)号：US08030924B2
公开(公告)日：2011-10-04
申请号：US11797878
申请日：2007-05-08
申请人： Yoshitaka Bito , Hisaaki Ochi , Yo Taniguchi , Satoshi Hirata , Toru Shirai
发明人： Yoshitaka Bito , Hisaaki Ochi , Yo Taniguchi , Satoshi Hirata , Toru Shirai
IPC分类号： G01V3/00
CPC分类号： G01R33/485 , G01R33/5608
摘要： A magnetic resonance imaging system capable of conducting spectroscopic imaging with an improved SNR without degrading the spatial resolution includes edge-preserving filter processing means for spectroscopic imaging. The edge-preserving filter processing means executes processing including the steps of calculating spectral similarity in spatial neighborhoods (spatially neighboring voxels) at each voxel in spectroscopic imaging data, calculating a spectral weight according to the spectral similarity, and conducting weighted smoothing for compounding spectra of spatial neighborhoods (spatially neighboring voxels) according to the spectral weight.
摘要翻译：能够在不降低空间分辨率的情况下以改善的SNR进行光谱成像的磁共振成像系统包括用于分光成像的边缘保留滤波处理装置。边缘保留滤波处理装置执行处理，其包括以下步骤：计算分光成像数据中的每个体素的空间邻域（空间相邻体素）中的频谱相似度，根据频谱相似度计算频谱权重，以及进行加权平滑化，根据光谱权重的空间邻域（空间相邻体素）。

5. 发明授权

US07898255B2 Inspection apparatus using magnetic resonance and nuclear magnetic resonance signal receiver coil 有权
标题翻译：检测装置采用磁共振和核磁共振信号接收线圈
公开(公告)号：US07898255B2
公开(公告)日：2011-03-01
申请号：US11813011
申请日：2006-02-06
申请人： Hisaaki Ochi , Yo Taniguchi , Hiroyuki Takeuchi
发明人： Hisaaki Ochi , Yo Taniguchi , Hiroyuki Takeuchi
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , A61B5/055 , G01R33/34084 , G01R33/365 , G01R33/3657 , G01R33/5611
摘要： An MRI apparatus capable of selecting an optional direction as a phase encoding direction and achieving a preferable S/N, when an imaging time shortening technique is applied. A receiver coil, used as a receiver coil of a vertical magnetic field MRI apparatus, is a combination of a first coil (solenoid coil) forming a current loop around the outer circumference of a test object, second coils forming even-numbered current loops, and third coils forming odd-numbered current loops, in the direction intersecting the plane of the current loop of the first coil. The second coil and the third coil are arranged in such a manner that, as for the current loops in the array direction thereof, a position where a sensitivity of one coil is minimized approximately coincides with a position where the sensitivity of the other coil is maximized, whereby electromagnetic coupling is suppressed.
摘要翻译：当应用成像时间缩短技术时，能够选择可选方向作为相位编码方向并获得优选的S / N的MRI装置。用作垂直磁场MRI设备的接收器线圈的接收器线圈是形成围绕测试对象的外圆周的电流回路的第一线圈（螺线管线圈），形成偶数电流回路的第二线圈，以及在与第一线圈的电流回路的平面相交的方向上形成奇数电流回路的第三线圈。第二线圈和第三线圈以这样的方式布置，即对于其排列方向上的电流环，一个线圈的灵敏度最小化的位置近似与其他线圈的灵敏度最大化的位置一致从而抑制电磁耦合。

6. 发明授权

US07626388B2 Magnetic resonance imager 有权
标题翻译：磁共振成像仪
公开(公告)号：US07626388B2
公开(公告)日：2009-12-01
申请号：US10586732
申请日：2004-12-24
申请人： Yo Taniguchi , Shinji Kurokawa , Hisaaki Ochi
发明人： Yo Taniguchi , Shinji Kurokawa , Hisaaki Ochi
IPC分类号： G01V3/00
CPC分类号： G01R33/561 , G01R33/4818 , G01R33/4824 , G01R33/565 , G01R33/56509
摘要： Provided is a magnetic resonance imager capable of efficiently suppressing artifacts in radial scanning that is short of the number of echoes. Part of unmeasured echoes is measured as a reference echo. An estimation coefficient is calculated using echoes adjoining the reference echo, and used to estimate the unmeasured echoes.
摘要翻译：提供一种能够有效地抑制径向扫描中的伪像不足回波数的磁共振成像器。测量部分未测量的回波作为参考回波。使用与参考回波相邻的回波计算估计系数，并用于估计未测量的回波。

7. 发明授权

US07622926B2 Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：US07622926B2
公开(公告)日：2009-11-24
申请号：US11721707
申请日：2005-12-22
申请人： Yo Taniguchi , Hisaaki Ochi , Masahiro Takizawa , Tetsuhiko Takahashi
发明人： Yo Taniguchi , Hisaaki Ochi , Masahiro Takizawa , Tetsuhiko Takahashi
IPC分类号： G01V3/00
CPC分类号： G01R33/56509 , G01R33/4824 , G01R33/561 , G01R33/5614 , G01R33/5616
摘要： Provided is a magnetic resonance imaging apparatus capable of highly precisely detecting and compensating body motions within a short processing time during radial scanning. The magnetic resonance imaging apparatus includes a control unit that applies radiofrequency magnetic fields and magnetic field gradients to a subject lying down in a static magnetic field and that detects magnetic resonance signals generated from the subject, and an arithmetic unit that handles the signals. The arithmetic unit performs subject's body motion detection in an image space, uses an image, which is reconstructed using the low-frequency portion of the k-space data of the image, as criterial data, produces templates by moving the criterial data in advance by predetermined magnitudes of rotations and predetermined magnitudes of translations, and uses the produced templates to perform the body motion detection.
摘要翻译：提供一种磁共振成像装置，其能够在径向扫描期间在短的处理时间内高精度地检测和补偿身体运动。磁共振成像装置包括：控制单元，其对位于静态磁场中的被摄体进行射频磁场和磁场梯度，并且检测从被检体产生的磁共振信号;以及运算单元，其处理该信号。算术单元在图像空间中进行被摄体的身体运动检测，使用利用图像的k空间数据的低频部分重构的图像作为标准数据，通过预先移动标准数据来生成模板预定的旋转角度和预定的平移量，并且使用所产生的模板来执行身体运动检测。

8. 发明申请

US20090201020A1 MAGNETIC RESONANCE APPARATUS UTILIZING TIME-VARYING RATE OF MAGNETIC RESONANT FREQUENCY 失效
标题翻译：磁共振器利用磁共振频率的时变速率的磁共振装置
公开(公告)号：US20090201020A1
公开(公告)日：2009-08-13
申请号：US12423431
申请日：2009-04-14
申请人： Satoshi Hirata , Hisaaki Ochi , Yo Taniguchi , Tetsuhiko Takahashi , Hiroyuki Takeuchi
发明人： Satoshi Hirata , Hisaaki Ochi , Yo Taniguchi , Tetsuhiko Takahashi , Hiroyuki Takeuchi
IPC分类号： G01R33/48
CPC分类号： A61B5/411 , A61B5/0037 , A61B5/055 , A61B5/415 , A61B5/416 , A61B5/418 , A61B5/7257 , G01R33/389 , G01R33/485
摘要： The present invention provides a magnetic resonance imaging system capable of performing spectrum measurement even when a magnetic resonant frequency changes during MRS measurement. A time-varying rate of a water magnetic resonant frequency is measured in advance before the MRS measurement. The amount of change in water magnetic resonant frequency during the MRS measurement is predicted from the measured time-varying rate. With the predicted value as the reference, a transmission frequency of an RF magnetic field irradiated in a signal suppression pulse sequence, a transmission frequency of an RF magnetic field for excitation and inversion and a received frequency at the detection of a magnetic resonance signal in a sequence of the MRS measurement are respectively set. A high-precision spectrum measurement is hence enabled.
摘要翻译：本发明提供一种磁共振成像系统，即使MRS测量期间磁共振频率发生变化，也能进行光谱测量。在MRS测量之前，预先测量水磁共振频率的时变速率。 MRS测量期间水磁共振频率的变化量根据测量的时变速率预测。以预测值为参考，在信号抑制脉冲序列中照射的RF磁场的传输频率，用于激励和反转的RF磁场的传输频率和在检测磁共振信号中的接收频率分别设置MRS测量的顺序。因此，能够进行高精度的频谱测量。

9. 发明授权

US07518362B2 Magnetic resonance apparatus utilizing time-varying rate of magnetic resonant frequency 有权
标题翻译：磁共振装置利用磁共振频率的时变速率
公开(公告)号：US07518362B2
公开(公告)日：2009-04-14
申请号：US10562643
申请日：2004-06-02
申请人： Satoshi Hirata , Hisaaki Ochi , Yo Taniguchi , Tetsuhiko Takahashi , Hiroyuki Takeuchi
发明人： Satoshi Hirata , Hisaaki Ochi , Yo Taniguchi , Tetsuhiko Takahashi , Hiroyuki Takeuchi
IPC分类号： G01V3/00
CPC分类号： A61B5/411 , A61B5/0037 , A61B5/055 , A61B5/415 , A61B5/416 , A61B5/418 , A61B5/7257 , G01R33/389 , G01R33/485
摘要： The present invention provides a magnetic resonance imaging system capable of performing spectrum measurement even when a magnetic resonant frequency changes during MRS measurement. A time-varying rate of a water magnetic resonant frequency is measured in advance before the MRS measurement. The amount of change in water magnetic resonant frequency during the MRS measurement is predicted from the measured time-varying rate. With the predicted value as the reference, a transmission frequency of an RF magnetic field irradiated in a signal suppression pulse sequence, a transmission frequency of an RF magnetic field for excitation and inversion and a received frequency at the detection of a magnetic resonance signal in a sequence of the MRS measurement are respectively set. A high-precision spectrum measurement is hence enabled.
摘要翻译：本发明提供一种磁共振成像系统，即使MRS测量期间磁共振频率发生变化，也能进行光谱测量。在MRS测量之前，预先测量水磁共振频率的时变速率。 MRS测量期间水磁共振频率的变化量根据测量的时变速率预测。以预测值为参考，在信号抑制脉冲序列中照射的RF磁场的传输频率，用于激励和反转的RF磁场的传输频率和在检测磁共振信号中的接收频率分别设置MRS测量的顺序。因此，能够进行高精度的频谱测量。

10. 发明申请

US20090030302A1 MAGNETIC RESONANCE IMAGING DEVICE 失效
标题翻译：磁共振成像装置
公开(公告)号：US20090030302A1
公开(公告)日：2009-01-29
申请号：US11917689
申请日：2006-06-15
申请人： Yo Taniguchi , Hisaaki Ochi , Tetsuhiko Takahashi , Masahiro Takizawa
发明人： Yo Taniguchi , Hisaaki Ochi , Tetsuhiko Takahashi , Masahiro Takizawa
IPC分类号： A61B5/055
CPC分类号： G01R33/56375 , A61B5/055 , A61B6/5241 , G01R33/5608 , G01R33/56383 , G06T3/0075
摘要： The magnetic resonance imaging apparatus includes a control unit for controlling a pulse sequence that applies an RF magnetic field and a magnetic field gradient to a subject placed in a static magnetic field and detects a magnetic resonance signal generated from the subject, and a calculation unit for processing the signal, and the control unit performs the process including the steps of; (1) obtaining first images at different positions in a first direction, (2) obtaining images after the first images are subjected to correction of brightness distortion, (3) obtaining images after the images as to which the brightness distortion has been corrected are further subjected to correction of positional distortion, and (4) synthesizing by a weighting calculation, overlapping areas of the images, after the positional distortion thereof has been corrected. According to this magnetic resonance imaging apparatus, the positional distortion and the brightness distortion can be corrected upon connecting the images, in the multi-station imaging.
摘要翻译：磁共振成像装置包括：控制单元，用于控制对放置在静态磁场中的被摄体施加RF磁场和磁场梯度的脉冲序列，并检测从对象产生的磁共振信号;以及计算单元，处理信号，并且控制单元执行包括以下步骤的处理：（1）在第一方向上获取不同位置的第一图像，（2）在第一图像经受亮度失真校正之后获得图像，（3）获得图像之后的亮度失真已被校正的图像进一步获得进行位置失真的校正，（4）通过加权计算合成图像的重叠区域，在其位置失真被校正之后。根据该磁共振成像装置，在多台成像中，可以在连接图像时校正位置失真和亮度失真。

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