公开(公告)号：US20070038076A1

公开(公告)日：2007-02-15

申请号：US11356010

申请日：2006-02-17

申请人： Akiko Osada ,  Yukari Yamamoto ,  Yo Taniguchi

发明人： Akiko Osada ,  Yukari Yamamoto ,  Yo Taniguchi

IPC分类号： A61B5/05

CPC分类号： G01R33/5601 ,  G01R33/282

摘要： The invention provides an MRI apparatus capable of using a static magnetic filed magnet provided therein as a magnet for polarization, and performing DNP therein without changing a construction of a conventional MRI apparatus. A DNP means placed in the MRI apparatus includes a sample tube, cooling units for cooling and solidifying a sample in the sample tube, a microwave irradiating unit, and a metal tube. At least a member placed near an imaging space (five-gauss line) of the MRI apparatus is made of a nonmagnetic material, and a static magnetic field generating magnet of the MRI apparatus is used as a magnetic field applying means for applying a magnetic field to the sample for polarization. A contrast agent generated by the DNP can be immediately injected into a patient for imaging, so as to provide an image with high S/N.

摘要翻译： 本发明提供一种MRI设备，其能够使用其中提供的静磁磁体作为磁极用于极化，并且在不改变常规MRI设备的结构的情况下执行DNP。 放置在MRI装置中的DNP装置包括样品管，用于冷却固化样品管中的样品的冷却单元，微波照射单元和金属管。 位于MRI装置的成像空间（五高斯线）附近的至少一个构件由非磁性材料制成，MRI装置的静磁场产生磁体用作施加磁场的磁场施加装置 到样品进行极化。 由DNP产生的造影剂可以立即注射到患者进行成像，以提供高S / N的图像。

公开(公告)号：US06744251B2

公开(公告)日：2004-06-01

申请号：US10309150

申请日：2002-12-04

申请人： Yo Taniguchi ,  Yukari Yamamoto ,  Hisaaki Ochi ,  Shinichiro Umemura

发明人： Yo Taniguchi ,  Yukari Yamamoto ,  Hisaaki Ochi ,  Shinichiro Umemura

IPC分类号： G01V300

CPC分类号： G01R33/4833

摘要： A nuclear-magnetic-resonance inspection apparatus that enables an examiner to designate directly a section of a subject to be imaged. The NMR inspection apparatus has a section-designating unit containing reference objects A, B, and C that can be set at three reference points, and can be held in the hand of an examiner to be moved and operated in close proximity to the subject, wherein a prescribed part of a plane including the reference objects set at up to three reference points is the section of the subject to be imaged. While watching the subject, the examiner can directly designate a section to be imaged. Thus, diagnoses can be made easily and quickly.

摘要翻译： 核磁共振检查装置，使得检查者能够直接指定待成像对象的一部分。 NMR检查装置具有包含可设置在三个参考点上的参考对象A，B和C的区段指定单元，并且可以保持在检查者的手中，以便靠近对象移动和操作， 其中包括设置在多达三个参考点处的参考对象的平面的规定部分是待成像对象的部分。 在观看主题的同时，审查员可以直接指定要成像的部分。 因此，可以容易且快速地进行诊断。

公开(公告)号：US09476956B2

公开(公告)日：2016-10-25

申请号：US13984537

申请日：2012-01-19

申请人： Yo Taniguchi ,  Suguru Yokosawa ,  Yoshitaka Bito

发明人： Yo Taniguchi ,  Suguru Yokosawa ,  Yoshitaka Bito

IPC分类号： G01R33/56 ,  A61B5/055 ,  G01R33/565 ,  G01R33/561

CPC分类号： G01R33/56 ,  A61B5/055 ,  G01R33/5614 ,  G01R33/5616 ,  G01R33/56554 ,  G01R33/56572

摘要： In order to improve image quality, a technique for obtaining information for eliminating distortions of the k-space in the readout direction and the phase encoding direction caused by the waveform distortion of the gradient magnetic field pulse is provided. A pulse sequence for the main scan is used to repeatedly measure echoes with changing the time integral value of the dephasing pulse for the readout gradient magnetic field. In the above measurement, the phase encoding pulse is not made zero, but two-dimensional data are measured in the same manner as that of the main scan. By using the measured two-dimensional data, correction information for eliminating distortions of the k-space in the readout direction and the phase encoding direction caused by the waveform distortion of the gradient magnetic field pulse is calculated in each of the readout direction and the phase encoding direction.

摘要翻译： 为了提高图像质量，提供了一种用于获得用于消除由梯度磁场脉冲的波形失真引起的读出方向和相位编码方向上的k空间的失真的信息的技术。 用于主扫描的脉冲序列用于通过改变读出梯度磁场的去相位脉冲的时间积分值来重复测量回波。 在上述测量中，相位编码脉冲不为零，而是以与主扫描相同的方式测量二维数据。 通过使用所测量的二维数据，在每个读出方向和相位上计算用于消除由梯度磁场脉冲的波形失真引起的读出方向上的k空间的失真和相位编码方向的校正信息 编码方向。

公开(公告)号：US08083679B1

公开(公告)日：2011-12-27

申请号：US11572322

申请日：2005-07-20

申请人： Takashi Azuma ,  Shinichiro Umemura ,  Yo Taniguchi

发明人： Takashi Azuma ,  Shinichiro Umemura ,  Yo Taniguchi

IPC分类号： A61B8/14

CPC分类号： A61B8/0883 ,  A61B8/13 ,  G01S15/8984

摘要： An ultrasonic image capturing apparatus is disclosed for transmitting ultrasonic pulses from an ultrasonic probe in which elements are arranged two-dimensionally to a subject, receiving the ultrasonic pulses reflected by the subject, and displaying a slice image of the subject. A vector Doppler processor detects motion of the subject along the direction of an aperture of a receiving beam former, and a displacement detector detects motion of a focus region in the subject based on a result of computation of the vector Doppler processor. A scanning plate setting section determines an image capturing region by using ultrasonic waves by the displacement detector.

摘要翻译： 公开了一种用于从超声波探头发射超声波脉冲的超声波图像捕获装置，其中元件被二维地布置到被摄体，接收被检体反射的超声波脉冲，并显示被检体的切片图像。 矢量多普勒处理器根据接收束形成器的孔径的方向来检测被摄体的运动，位移检测器基于矢量多普勒处理器的计算结果来检测被摄体中的对焦区域的运动。 扫描板设置部分通过使用位移检测器的超声波来确定图像捕获区域。

公开(公告)号：US20110112393A1

公开(公告)日：2011-05-12

申请号：US13054155

申请日：2009-07-22

申请人： Yo Taniguchi ,  Yoshitaka Bito ,  Shoichi Miyawaki ,  Hiroyuki Takeuchi ,  Suguru Yokosawa

发明人： Yo Taniguchi ,  Yoshitaka Bito ,  Shoichi Miyawaki ,  Hiroyuki Takeuchi ,  Suguru Yokosawa

IPC分类号： A61B5/055

CPC分类号： G01R33/56518 ,  A61B5/055 ,  A61B5/7257 ,  G01R33/5616 ,  G01R33/56341 ,  G01R33/56563

摘要： In the diffusion-weighted imaging, amounts of distortion and amounts of phase offset of k-space data due to a temporally changing magnetic field error induced by eddy currents and vibrations associated with application of a diffusion-weighted gradient magnetic field pulse are corrected with good precision to improve image quality. Characteristic data for correcting distortion of k-space data are calculated for every position in the slice direction as peak shifts of projections observed between the cases of applying and not applying an MPG pulse. As the characteristic data, amounts of distortion in the read-out direction and the phase encoding direction and phase offset amounts in a slice plane are calculated.

摘要翻译： 在扩散加权成像中，由于由涡流引起的瞬时变化的磁场误差和与施加扩散加权梯度磁场脉冲相关的振动引起的k空间数据的失真量和相位偏移量被校正为良好 精度提高图像质量。 针对切片方向上的每个位置计算用于校正k空间数据的失真的特征数据，作为施加和不施加MPG脉冲的情况之间观察到的投影的峰值偏移。 作为特征数据，计算读取方向上的失真量和切片平面中的相位编码方向和相位偏移量。

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。

公开(公告)号：US07723987B2

公开(公告)日：2010-05-25

申请号：US12071896

申请日：2008-02-27

申请人： Yoshitaka Bito ,  Yo Taniguchi ,  Toru Shirai ,  Shinji Kurokawa

发明人： Yoshitaka Bito ,  Yo Taniguchi ,  Toru Shirai ,  Shinji Kurokawa

IPC分类号： G01V3/00

CPC分类号： G01R33/4833 ,  G01R33/4835 ,  G01R33/561

摘要： A magnetic resonance measurement technique is provided which shortens the measurement time while suppressing artifacts caused by body movement of a measuring object and enables high-speed imaging. An excitation pulse which excites a plurality of slice planes and an excitation pulse which excites slice planes perpendicular to the slice planes are applied and a plurality of substantially parallel linear crossing areas are simultaneously measured. Spatial information of a linear direction of the crossing areas is acquired by modulating a magnetic resonance signal from the crossing areas by a gradient magnetic field. A spatial information of a direction perpendicular to the linear direction is acquired by changing the position of the plane and an image is reconstructed.

摘要翻译： 提供一种磁共振测量技术，其可以在抑制由测量对象的身体移动引起的伪像的同时缩短测量时间并且能够进行高速成像。 激励激发多个切片平面的激励脉冲和激发与切片平面垂直的切片平面的激励脉冲，同时测量多个基本上平行的线性交叉区域。 交叉区域的线性方向的空间信息是通过梯度磁场调制来自交叉区域的磁共振信号而得到的。 通过改变平面的位置并且重建图像来获取垂直于线性方向的方向的空间信息。

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。

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。

公开(公告)号：US5382902A

公开(公告)日：1995-01-17

申请号：US985645

申请日：1992-12-07

申请人： Yo Taniguchi ,  Etsuji Yamamoto

发明人： Yo Taniguchi ,  Etsuji Yamamoto

IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/563 ,  G01R33/567 ,  G01V3/00

CPC分类号： G01R33/5676

摘要： A magnetic resonance imaging method for obtaining an image of an object laid in a space in which a static magnetic field is applied, so as to substantially eliminate motional artifacts. The method includes sequentially measuring a plurality of magnetic resonance views with a plurality of encodings by repeating a measurement sequence of exciting nuclear spins in said object, applying a phase-encoding field gradient along a first direction with programmed time integral to encode the excited spins, and detecting the encoded spins in the presence of a readout field gradient along a second direction to generate a magnetic resonance view so that measurements of magnetic resonance views with at least low-order encoding are obtained during the repetition of the measurement sequence. Thereafter respective magnetic resonance views are subjected to a first Fourier transformation so as to generate a plurality of projection views with a plurality of encodings forming a data matrix in a hybrid domain, displacements in respective projection views due to motion of the object are corrected using displacement information obtained from projection views with low-order encodings so as to generate a corrected data matrix in the hybrid domain, and the corrected data matrix is subjected to a second Fourier transformation so as to generate the image of the object.

摘要翻译： 一种磁共振成像方法，用于获得放置在施加静磁场的空间中的物体的图像，以便基本上消除运动伪像。 该方法包括通过重复所述物体中激发的核自旋的测量序列来顺序地测量具有多个编码的多个磁共振视图，沿着第一方向施加相位编码场梯度以编程的时间积分来编码激励的自旋， 以及在沿着第二方向存在读出场梯度的情况下检测编码的旋转以产生磁共振视图，使得在重复测量序列期间获得具有至少低阶编码的磁共振视图的测量。 然后对各磁共振视图进行第一傅里叶变换，以便在混合域中产生多个形成数据矩阵的编码的多个投影视图，由于对象的运动而在各个投影视图中的位移使用位移进行校正 从具有低阶编码的投影视图获得的信息，以便在混合域中产生校正数据矩阵，并且对经校正的数据矩阵进行第二傅立叶变换，以便生成对象的图像。