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1. 发明授权

US08032201B2 Magnetic resonance imaging device 失效
标题翻译：磁共振成像装置
公开(公告)号：US08032201B2
公开(公告)日：2011-10-04
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： A61B5/05
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。

2. 发明申请

US20080169808A1 Magnetic Resonance Imaging Apparatus 有权
标题翻译：磁共振成像仪
公开(公告)号：US20080169808A1
公开(公告)日：2008-07-17
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： G01R33/565 , G01R33/48
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。

3. 发明授权

US06876201B2 Magnetic resonance imaging apparatus and method 有权
标题翻译：磁共振成像装置及方法
公开(公告)号：US06876201B2
公开(公告)日：2005-04-05
申请号：US10468963
申请日：2002-02-25
申请人： Masahiro Takizawa , Tetsuhiko Takahashi , Hisaaki Ochi , Yo Taniguchi
发明人： Masahiro Takizawa , Tetsuhiko Takahashi , Hisaaki Ochi , Yo Taniguchi
IPC分类号： G01R33/3415 , G01R33/561 , G01V3/00
CPC分类号： G01R33/5611 , G01R33/3415
摘要： A magnetic resonance imaging apparatus includes a magnetic field generation means for applying gradient magnetic fields and a radio-frequency magnetic field to a patient placed in a static magnetic field in a predetermined pulse sequence; a multiple RF receiving coil comprising at least three RF receiving coils for receiving the nuclear magnetic resonance signals generated from the patient; and an image reconstruction means for reconstructing an image by processing the received nuclear magnetic resonance signals, wherein the image reconstruction means includes a coil selection means for selecting a plurality of RF receiving coil groups that are preset by combining the plurality of RF receiving coils according to imaging conditions, a synthesization means for synthesizing the measured data received by the respective RF receiving coils of each of the plurality of selected RF receiving coil groups, and a calculation means for eliminating aliasing artifacts by executing a matrix calculation as to the synthesized data.
摘要翻译：磁共振成像装置包括磁场产生装置，用于以预定的脉冲序列向放置在静态磁场中的患者施加梯度磁场和射频磁场; 多个RF接收线圈，其包括用于接收从患者产生的核磁共振信号的至少三个RF接收线圈; 以及图像重建装置，用于通过处理所接收的核磁共振信号来重建图像，其中图像重建装置包括线圈选择装置，用于选择通过组合多个RF接收线圈来预设的多个RF接收线圈组，根据成像条件，用于合成由多个选择的RF接收线圈组中的每一个的相应RF接收线圈接收的测量数据的合成装置，以及用于通过执行关于合成数据的矩阵计算来消除混叠伪像的计算装置。

4. 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。

5. 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。

6. 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。

7. 发明申请

US20060255802A1 Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：US20060255802A1
公开(公告)日：2006-11-16
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。

8. 发明授权

US07061242B2 Magnetic resonance imaging system 失效
标题翻译：磁共振成像系统
公开(公告)号：US07061242B2
公开(公告)日：2006-06-13
申请号：US10432166
申请日：2001-11-20
申请人： Hisaaki Ochi , Yo Taniguchi , Tetsuhiko Takahashi , Ken'ichi Okajima
发明人： Hisaaki Ochi , Yo Taniguchi , Tetsuhiko Takahashi , Ken'ichi Okajima
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , A61B5/055
摘要： To provide a diagnostic apparatus utilizing nuclear magnetic resonance suitable for interventional MRI which is not limited as to selection of an imaging section and an phase-encoding axis, the reception coil thereof includes three loop coils arranged so as to surround an object to be examined and to be within a plane including a line segment parallel to a static magnetic field direction, and two surface coils arranged in the vicinity of the surface of the object within a plane including a line segment perpendicular to the static magnetic field direction. In the reception coil, two or more sub-coils have nonuniform sensitivity profiles along an arbitrary axis. Therefore, the reception coil configured to have sensitivity throughout the imaging areas can be realized.
摘要翻译：为了提供利用适于介入MRI的核磁共振的诊断装置，其不限于成像部分和相位编码轴的选择，其接收线圈包括布置成围绕被检查物体的三个环形线圈，在包括平行于静磁场方向的线段的平面内，以及布置在物体表面附近的包括垂直于静磁场方向的线段的平面内的两个表面线圈。在接收线圈中，两个或更多个子线圈沿任意轴线具有不均匀的灵敏度分布。因此，可以实现在整个成像区域具有灵敏度的接收线圈。

9. 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。

10. 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。

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