公开(公告)号：USD639399S1

公开(公告)日：2011-06-07

申请号：US29354803

申请日：2010-01-28

Applicant: Hiroyuki Takeuchi ,  Yasushi Takahashi ,  Masafumi Ishikawa

Designer： Hiroyuki Takeuchi ,  Yasushi Takahashi ,  Masafumi Ishikawa

公开(公告)号：US20110112393A1

公开(公告)日：2011-05-12

申请号：US13054155

申请日：2009-07-22

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

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

IPC: A61B5/055

CPC classification number: G01R33/56518 ,  A61B5/055 ,  A61B5/7257 ,  G01R33/5616 ,  G01R33/56341 ,  G01R33/56563

Abstract: 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.

Abstract translation: 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：US07928820B2

公开(公告)日：2011-04-19

申请号：US12358612

申请日：2009-01-23

Applicant: Tomoo Chiba ,  Hiroyuki Watanabe ,  Hirotaka Takeshima ,  Shigeki Tounosu ,  Mitsushi Abe ,  Hiroyuki Takeuchi

Inventor： Tomoo Chiba ,  Hiroyuki Watanabe ,  Hirotaka Takeshima ,  Shigeki Tounosu ,  Mitsushi Abe ,  Hiroyuki Takeuchi

IPC: H01F6/00 ,  G01V3/00

CPC classification number: H01F6/04 ,  G01R33/3804 ,  G01R33/3806 ,  G01R33/3815

Abstract: In a superconducting magnet, including a vacuum vessel, a coil vessel inside the vacuum vessel, and a superconducting coil inside the coil vessel for generating a magnetic field, has a magnetic member, disposed inside the vacuum vessel, supported with thermal insulation, for compensating the magnetic field; a heat exchange device disposed outside the vacuum vessel for supplying to or absorbing heat from the vacuum vessel; and thermal conducting members thermally connecting the heat exchange device via the vacuum vessel to the magnetic member. An MRI including the superconducting magnet is also disclosed.

Abstract translation: 在包括真空容器的真空容器的超导磁体中，真空容器内部的线圈容器和用于产生磁场的线圈容器内的超导线圈具有设置在真空容器内的热绝缘支撑的磁性构件，用于补偿 磁场; 设置在所述真空容器外部的用于从所述真空容器供给或吸收热量的热交换装置; 以及导热构件，其通过所述真空容器将所述热交换装置热连接到所述磁性构件。 还公开了包括超导磁体的MRI。

公开(公告)号：US07852076B2

公开(公告)日：2010-12-14

申请号：US12423431

申请日：2009-04-14

Applicant: Satoshi Hirata ,  Hisaaki Ochi ,  Yo Taniguchi ,  Tetsuhiko Takahashi ,  Hiroyuki Takeuchi

Inventor： Satoshi Hirata ,  Hisaaki Ochi ,  Yo Taniguchi ,  Tetsuhiko Takahashi ,  Hiroyuki Takeuchi

IPC: G01V3/00

CPC classification number: A61B5/411 ,  A61B5/0037 ,  A61B5/055 ,  A61B5/415 ,  A61B5/416 ,  A61B5/418 ,  A61B5/7257 ,  G01R33/389 ,  G01R33/485

Abstract: 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.

Abstract translation: 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：USD620566S1

公开(公告)日：2010-07-27

申请号：US29346126

申请日：2009-10-27

Applicant: Rina Ogata ,  Yasushi Takahashi ,  Hiroyuki Takeuchi

Designer： Rina Ogata ,  Yasushi Takahashi ,  Hiroyuki Takeuchi

公开(公告)号：US20100156418A1

公开(公告)日：2010-06-24

申请号：US12663939

申请日：2008-06-25

Applicant: Takayuki Abe ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi

Inventor： Takayuki Abe ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi

IPC: G01R33/48

CPC classification number: A61B5/055 ,  G01R33/4828 ,  G01R33/4835 ,  G01R33/5607

Abstract: In order to stably obtain an even fat-suppressed image without reduction of an imaging efficiency and without being affected by unevenness of irradiation magnetic field of an RF pulse, when an imaging sequence having a first sequence part for suppressing a signal from a desired component of an examinee by applying a CHESS pulse and a second sequence part for measuring an echo signal from the examinee is repeated, the flip angle of the CHESS pulse is changed at plural times. In the case of multi-slice imaging, the flip angle of the CHESS pulse is changed in at lest two slice imaging.

Abstract translation: 为了稳定地获得均匀的脂肪抑制图像而不降低成像效率并且不受RF脉冲的照射磁场的不均匀性的影响，当具有用于抑制来自所需成分的信号的第一序列部分的成像序列 重复通过应用CHESS脉冲的受检者和用于测量来自受检者的回波信号的第二序列部分，CHESS脉冲的翻转角多次改变。 在多切片成像的情况下，CHESS脉冲的翻转角仅在两个切片成像中进行改变。

公开(公告)号：US20100013478A1

公开(公告)日：2010-01-21

申请号：US12439104

申请日：2007-09-28

Applicant: Takayuki Abe ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi

Inventor： Takayuki Abe ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi

IPC: G01R33/48

CPC classification number: G01R33/4828 ,  G01R33/5607

Abstract: A magnetic resonance imaging device includes magnetic field generating means and control means for controlling receiving means according to a predetermined pulse sequence, the predetermined pulse sequence including an unnecessary material suppressing sequence unit for canceling a signal from an unnecessary material which is not a measurement target and a main imaging sequence unit for measuring a nuclear magnetic resonance signal used to create an image of an examinee. The unnecessary material suppressing sequence unit generates at least two or more high frequency magnetic field pulses so that the longitudinal magnetization of the unnecessary material is made spatially uniform in the imaging space under application of a first high frequency magnetic field pulse in the main imaging sequence unit. The magnetic resonance imaging device further includes adjusting means for adjusting the flip angles of the two or more high frequency magnetic field pulses, and the control means applies the two or more high frequency magnetic field pulses at the flip angles adjusted by the adjusting means.

Abstract translation: 磁共振成像装置包括磁场产生装置和用于根据预定脉冲序列控制接收装置的控制装置，所述预定脉冲序列包括用于从不是测量目标的不必要材料消除信号的不必要材料抑制序列单元，以及 用于测量用于创建受检者的图像的核磁共振信号的主要成像序列单元。 不需要的材料抑制序列单元产生至少两个或更多个高频磁场脉冲，使得在主成像序列单元中施加第一高频磁场脉冲时，不需要的材料的纵向磁化在成像空间中在空间上均匀 。 磁共振成像装置还包括用于调节两个或多个高频磁场脉冲的翻转角的调节装置，并且控制装置以由调节装置调节的翻转角施加两个或更多个高频磁场脉冲。

公开(公告)号：US20090189721A1

公开(公告)日：2009-07-30

申请号：US12358612

申请日：2009-01-23

Applicant: Tomoo CHIBA ,  Hiroyuki Watanabe ,  Hirotaka Takeshima ,  Shigeki Tounosu ,  Mitsushi Abe ,  Hiroyuki Takeuchi

Inventor： Tomoo CHIBA ,  Hiroyuki Watanabe ,  Hirotaka Takeshima ,  Shigeki Tounosu ,  Mitsushi Abe ,  Hiroyuki Takeuchi

IPC: H01F6/00

CPC classification number: H01F6/04 ,  G01R33/3804 ,  G01R33/3806 ,  G01R33/3815

Abstract: In a superconducting magnet, including a vacuum vessel, a coil vessel inside the vacuum vessel, and a superconducting coil inside the coil vessel for generating a magnetic field, has a magnetic member, disposed inside the vacuum vessel, supported with thermal insulation, for compensating the magnetic field; a heat exchange device disposed outside the vacuum vessel for supplying to or absorbing heat from the vacuum vessel; and thermal conducting members thermally connecting the heat exchange device via the vacuum vessel to the magnetic member. An MRI including the superconducting magnet is also disclosed.

Abstract translation: 在包括真空容器的真空容器的超导磁体中，真空容器内部的线圈容器和用于产生磁场的线圈容器内的超导线圈具有设置在真空容器内的热绝缘支撑的磁性构件，用于补偿 磁场; 设置在所述真空容器外部的用于从所述真空容器供给或吸收热量的热交换装置; 以及导热构件，其通过所述真空容器将所述热交换装置热连接到所述磁性构件。 还公开了包括超导磁体的MRI。

公开(公告)号：US20090066332A1

公开(公告)日：2009-03-12

申请号：US12296719

申请日：2007-04-10

Applicant: Takeshi Yatsuo ,  Hiroyuki Takeuchi ,  Akira Kurome

Inventor： Takeshi Yatsuo ,  Hiroyuki Takeuchi ,  Akira Kurome

IPC: G01R33/385

CPC classification number: G01R33/385 ,  G01R33/3856 ,  G01R33/3858 ,  G01R33/4215 ,  G01R33/422

Abstract: An MRI apparatus excellent in magnetic field generation efficiency is provided. According to this invention, a main coil (52) of a gradient magnetic field coil (13) is partially recessed to reduce the total thickness of a radio-frequency coil (11) and a gradient magnetic field coil (13). That is, the main coil (52) is designed in a tubular shape, and the diameter r1 at the center portion of the imaging space is larger than the diameter r2 of the main coil end portion. Accordingly, the RF coil (11) can be disposed to be near to the gradient magnetic field coil (13) side without lowering the magnetic field generation efficiency.

Abstract translation: 提供了磁场产生效率优异的MRI装置。 根据本发明，梯度磁场线圈（13）的主线圈（52）部分地凹入，以减小射频线圈（11）和梯度磁场线圈（13）的总厚度。 也就是说，主线圈（52）被设计成管状，并且成像空间的中心部分处的直径r1大于主线圈端部的直径r2。 因此，RF线圈（11）可以靠近梯度磁场线圈（13）而不降低磁场产生效率。

公开(公告)号：US07498809B2

公开(公告)日：2009-03-03

申请号：US10540952

申请日：2003-12-24

Applicant: Tetsuhiko Takahashi ,  Hiroyuki Takeuchi ,  Masahiro Takizawa

Inventor： Tetsuhiko Takahashi ,  Hiroyuki Takeuchi ,  Masahiro Takizawa

IPC: G01V3/00

CPC classification number: G01R33/483 ,  G01R33/4833

Abstract: An MRI apparatus suitable for realizing selective excitation utilizing multiple RF transmitting coils (parallel transmission) is provided. This MRI apparatus is provided with, as an RF receiving coil or RF transmitting coil, an RF transmitting coil 104 comprising a loop coil 210, primary differential coil 220 and secondary differential coil 230 having a common central axis 201. Upon imaging, the coils 210, 220 and 230 constituting the RF transmitting coil 104 are simultaneously driven by RF signals with the same phase, and only the differential coils 220 and 230 are driven in the second half of irradiation time with phases different by 180° from the phases for the first half. Alternatively, two times of measurements are performed as a pair, in which, in the first measurement, the coils 210, 220 and 230 are simultaneously driven with RF signals of the same phase, then in the second measurement, only the differential coils 220 and 230 are driven with phases inverse to the phases for the first measurement, and the signals measured respectively are added. Such imaging or addition of the results of two times of the measurement provides a profile for exciting a local region. This enables selective excitation of only a desired region without using any RF pulse for signal suppression.

Abstract translation: 提供了适用于利用多个RF发射线圈（并行传输）实现选择性激励的MRI装置。 该MRI装置设置有作为RF接收线圈或RF发射线圈的RF发射线圈104，RF发射线圈104包括环路线圈210，初级差分线圈220和具有公共中心轴线201的次级差分线圈230.成像后，线圈210 构成RF发送线圈104的220,230同时由具有相同相位的RF信号驱动，并且仅在差分线圈220和230被驱动的照射时间的后半部分中，与第一相位相位相差180° 半。 或者，作为一对执行两次测量，其中在第一测量中，线圈210,220和230同时由相同相位的RF信号驱动，然后在第二测量中，仅差分线圈220和 230以与第一次测量的相位相反的相位驱动，并且分别测量所分别的信号。 这种成像或两次测量的结果的添加提供了用于激发局部区域的简档。 这使得仅选择性地激发期望的区域，而不使用任何用于信号抑制的RF脉冲。