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1. 发明授权

US09678187B2 Magnetic resonance imaging device, phase value correction method and program 有权
公开(公告)号：US09678187B2
公开(公告)日：2017-06-13
申请号：US14240171
申请日：2012-07-27
申请人： Toru Shirai , Yoshitaka Bito , Satoshi Hirata , Yoshihisa Soutome
发明人： Toru Shirai , Yoshitaka Bito , Satoshi Hirata , Yoshihisa Soutome
IPC分类号： G01R33/46 , G01R33/485 , G01R33/565 , A61B5/055
CPC分类号： G01R33/4625 , A61B5/055 , G01R33/485 , G01R33/56518
摘要： An object of the present invention is to suppress artifacts generated by correction of spectral distortion induced by eddy currents in MRI devices with a simple method, and thereby improve accuracy of the correction.

2. 发明申请

US20130214785A1 MAGNETIC RESONANCE IMAGING DEVICE 有权
标题翻译：磁共振成像装置
公开(公告)号：US20130214785A1
公开(公告)日：2013-08-22
申请号：US13881739
申请日：2011-10-26
申请人： Toru Shirai , Yoshitaka Bito , Satoshi Hirata , Yoshihisa Soutome , Yo Taniguchi
发明人： Toru Shirai , Yoshitaka Bito , Satoshi Hirata , Yoshihisa Soutome , Yo Taniguchi
IPC分类号： G01R33/36
CPC分类号： G01R33/3621 , A61B5/055 , G01R33/465 , G01R33/4828 , G01R33/485 , G01R33/5611
摘要： Images of two or more kinds of substances showing different chemical shifts, such as water image and metabolite image, are obtained without extending measurement time. For example, images of two or more kinds of desired substances showing different chemical shifts, such as water image and metabolite image, are obtained by one time of execution of an imaging sequence. In this execution, a pre-pulse is applied so that signals of the substances to be separated shift on the image, and magnetic resonance signals are received with receiver RF coils in a number not smaller than the number of types of the substances to be separated. An image reconstructed from the magnetic resonance signals is separated into images of the individual substances using sensitivity maps of the receiver RF coils. Then, correction is performed for returning the shifted image to the original position. Further, residual signals induced by errors generated in the measurement and the separation processing are eliminated by using spectroscopic images obtained after the separation.
摘要翻译：在不延长测量时间的情况下，获得显示不同化学位移的两种或更多种物质的图像，例如水图像和代谢物图像。例如，通过一次执行成像序列，可以获得显示不同化学位移的两种或更多种所需物质的图像，例如水图像和代谢物图像。在该执行中，施加预脉冲，使得要分离的物质的信号在图像上移动，并且用接收器RF线圈接收不少于待分离物质的数量的数量的磁共振信号。使用接收机RF线圈的灵敏度图将从磁共振信号重构的图像分离成各个物质的图像。然后，执行用于将移动的图像返回到原始位置的校正。此外，通过使用分离后获得的分光图像来消除由测量和分离处理中产生的误差引起的残留信号。

3. 发明申请

US20140306703A1 MAGNETIC RESONANCE IMAGING DEVICE, PHASE VALUE CORRECTION METHOD AND PROGRAM 有权
标题翻译：磁共振成像装置，相位校正方法及程序
公开(公告)号：US20140306703A1
公开(公告)日：2014-10-16
申请号：US14240171
申请日：2012-07-27
申请人： Toru Shirai , Yoshitaka Bito , Satoshi Hirata , Yoshihisa Soutome
发明人： Toru Shirai , Yoshitaka Bito , Satoshi Hirata , Yoshihisa Soutome
IPC分类号： G01R33/46
CPC分类号： G01R33/4625 , A61B5/055 , G01R33/485 , G01R33/56518
摘要： An object of the present invention is to suppress artifacts generated by correction of spectral distortion induced by eddy currents in MRI devices with a simple method, and thereby improve accuracy of the correction. In the eddy current correction processing for correcting spectral distortion caused by an eddy current using phase values of FID signals of a substance showing higher signal intensities compared with a metabolite as an object of measurement, phase jumps of the phase values used for the correction are corrected beforehand. In the correction of the phase jumps, small phase change amount points are identified by using primary time differential values of the phase values, and the other points are identified as a phase jump generation region. Then, the primary time differential values corresponding to the identified phase jump generation regions are excluded. The phase jump generation regions are identified as regions where the primary time differential value changes in an amount not smaller than a threshold value defined beforehand within a range defined beforehand.
摘要翻译：本发明的目的是通过简单的方法来抑制由MRI装置中的涡流引起的光谱失真校正而产生的伪影，从而提高校正精度。在使用与作为测量对象的代谢物相比显示较高信号强度的物质的FID信号的相位值来校正由涡流引起的光谱失真的涡流校正处理中，校正用于校正的相位值的相位跳变预先。在相位跳变的校正中，通过使用相位值的一次时间差分值来识别小的相位变化量点，并且将其他点识别为相位跳跃产生区域。然后，排除与所识别的相位跳跃发生区域对应的主要时间差值。相位跳变产生区域被识别为主要时间差值在不小于预先定义的范围内预先定义的阈值的量的变化的区域。

4. 发明授权

US09389289B2 Magnetic resonance imaging device 有权
标题翻译：磁共振成像装置
公开(公告)号：US09389289B2
公开(公告)日：2016-07-12
申请号：US13881739
申请日：2011-10-26
申请人： Toru Shirai , Yoshitaka Bito , Satoshi Hirata , Yoshihisa Soutome , Yo Taniguchi
发明人： Toru Shirai , Yoshitaka Bito , Satoshi Hirata , Yoshihisa Soutome , Yo Taniguchi
IPC分类号： G01R33/36 , A61B5/055 , G01R33/465 , G01R33/48 , G01R33/485 , G01R33/561
CPC分类号： G01R33/3621 , A61B5/055 , G01R33/465 , G01R33/4828 , G01R33/485 , G01R33/5611
摘要： Images of two or more kinds of substances showing different chemical shifts, such as water image and metabolite image, are obtained without extending measurement time. For example, images of two or more kinds of desired substances showing different chemical shifts, such as water image and metabolite image, are obtained by one time of execution of an imaging sequence. In this execution, a pre-pulse is applied so that signals of the substances to be separated shift on the image, and magnetic resonance signals are received with receiver RF coils in a number not smaller than the number of types of the substances to be separated. An image reconstructed from the magnetic resonance signals is separated into images of the individual substances using sensitivity maps of the receiver RF coils. Then, correction is performed for returning the shifted image to the original position. Further, residual signals induced by errors generated in the measurement and the separation processing are eliminated by using spectroscopic images obtained after the separation.
摘要翻译：在不延长测量时间的情况下，获得显示不同化学位移的两种或更多种物质的图像，例如水图像和代谢物图像。例如，通过一次执行成像序列，可以获得显示不同化学位移的两种或更多种所需物质的图像，例如水图像和代谢物图像。在该执行中，施加预脉冲，使得要分离的物质的信号在图像上移动，并且用接收器RF线圈接收不少于待分离物质的数量的数量的磁共振信号。使用接收机RF线圈的灵敏度图将从磁共振信号重构的图像分离成各个物质的图像。然后，执行用于将移动的图像返回到原始位置的校正。此外，通过使用分离后获得的分光图像来消除由测量和分离处理中产生的误差引起的残留信号。

5. 发明授权

US09599685B2 Antenna device and magnetic resonance imaging device for suppressing absorption rate of irradiated waves 有权
公开(公告)号：US09599685B2
公开(公告)日：2017-03-21
申请号：US13877702
申请日：2011-10-06
申请人： Hideta Habara , Yoshitaka Bito , Hisaaki Ochi , Yoshihisa Soutome , Masayoshi Dohata , Tetsuhiko Takahashi , Hiroyuki Takeuchi
发明人： Hideta Habara , Yoshitaka Bito , Hisaaki Ochi , Yoshihisa Soutome , Masayoshi Dohata , Tetsuhiko Takahashi , Hiroyuki Takeuchi
IPC分类号： G01R33/34 , G01R33/345 , H01Q9/06 , H01Q21/20 , G01R33/28 , G01R33/36 , G01R33/422
CPC分类号： G01R33/34092 , G01R33/288 , G01R33/34046 , G01R33/3456 , G01R33/3657 , G01R33/422 , H01Q9/065 , H01Q21/20
摘要： There is provided a technique for suppressing increase of SAR without sacrificing sensitivity in RF coils used in MRI apparatuses. The present invention provides an antenna device comprising a sheet-shaped conductor and a ribbon-shaped conductor disposed on the subject side with respect to the sheet-shaped conductor with a predetermined distance from the sheet-shaped conductor. The ribbon-shaped conductor has a meandering shape, and is adjusted so as to resonate at transmission and reception frequencies, and it is constituted so that distance to the sheet-shaped conductor becomes smaller at both end part thereof along the static magnetic field direction compared with the distance to the sheet-shaped conductor at the center thereof. Moreover, the ribbon-shaped conductor is constituted so as to have a smaller width, as the distance to the sheet-shaped conductor becomes smaller.

6. 发明授权

US09459331B2 RF coil and magnetic resonance imaging device 有权
标题翻译：射频线圈和磁共振成像装置
公开(公告)号：US09459331B2
公开(公告)日：2016-10-04
申请号：US13984855
申请日：2012-02-01
申请人： Yosuke Otake , Yoshihisa Soutome , Ryota Sato , Yoshitaka Bito , Koji Hirata
发明人： Yosuke Otake , Yoshihisa Soutome , Ryota Sato , Yoshitaka Bito , Koji Hirata
IPC分类号： G01R33/3415 , G01R33/36 , G01R33/422 , G01R33/34
CPC分类号： G01R33/365 , G01R33/34053 , G01R33/34069 , G01R33/34076 , G01R33/3415 , G01R33/3635 , G01R33/3657 , G01R33/3678 , G01R33/422
摘要： To provide a technique for sufficiently eliminating magnetic coupling between RF coils and improving image quality when a multi-element multi-tuned RF coil is used as a receive RF coil for an MRI device. In the invention, each of RF coils which constitute a multi-element multi-tuned RF coil which is used as a receive RF coil for an MRI device is provided with an inter-coil magnetic coupling prevention circuit which resonates at each frequency to which each RF coil is tuned and provides a high impedance. The inter-coil magnetic coupling prevention circuit adjusts an inductor and a capacitor so that both of a circuit on the side of a pre-amplifier viewed from both ends of a signal reception circuit and a circuit on the side of the signal reception circuit viewed from both ends of a serial resonance circuit connected to the pre-amplifier resonate at a plurality of frequencies to which the respective RF coils are tuned.
摘要翻译：提供一种用于充分消除RF线圈之间的磁耦合并且当多元素多调谐RF线圈用作MRI装置的接收RF线圈时提高图像质量的技术。在本发明中，构成用作MRI装置的接收RF线圈的多元素多调谐RF线圈的每个RF线圈都设置有线圈间磁耦合防止电路，该电路在每个频率下共振， RF线圈被调谐并提供高阻抗。线圈间磁耦合防止电路调整电感器和电容器，使得从信号接收电路的两端观看的前置放大器侧的电路和从信号接收电路侧观察的电路连接到前置放大器的串联谐振电路的两端以相应的RF线圈调谐到的多个频率谐振。

7. 发明授权

US09182468B2 RF reception coil and magnetic resonance imaging apparatus using same 有权
标题翻译： RF接收线圈和使用其的磁共振成像装置
公开(公告)号：US09182468B2
公开(公告)日：2015-11-10
申请号：US13577241
申请日：2011-01-26
申请人： Yukio Kaneko , Hideta Habara , Yoshihisa Soutome , Yosuke Otake , Hisaaki Ochi , Yoshitaka Bito
发明人： Yukio Kaneko , Hideta Habara , Yoshihisa Soutome , Yosuke Otake , Hisaaki Ochi , Yoshitaka Bito
IPC分类号： G01R33/565 , G01R33/34 , G01R33/3415 , G01R33/36
CPC分类号： G01R33/5659 , G01R33/34076 , G01R33/3415 , G01R33/3657 , G01R33/3664 , G01R33/3678
摘要： There is provided a technique for improving quality of images obtained with an MRI apparatus by using the geometric structures of the conventional RF transmission coil and RF reception coil and without increasing burden on patients or MRI technicians. A conductor loop of an RF reception coil disposed between a subject and an RF transmission coil is used also as a loop for magnetic field adjustment in order to shield or enhance a rotating magnetic field B1 generated by the RF transmission coil. Further, the conductor loop operated as a conductor loop for magnetic field adjustment among the conductor loops constituting the RF reception coil is driven so that inhomogeneity of the rotating magnetic field B1 is reduced.
摘要翻译：提供了一种通过使用常规RF传输线圈和RF接收线圈的几何结构来提高使用MRI装置获得的图像质量并且不增加患者或MRI技术人员负担的技术。设置在被检体和RF传输线圈之间的RF接收线圈的导体环也用作用于磁场调整的环路，以便屏蔽或增强由RF传输线圈产生的旋转磁场B1。此外，作为构成RF接收线圈的导体环路之间用于磁场调整的导体回路的导体回路被驱动，使得旋转磁场B1的不均匀性降低。

8. 发明申请

US20130221968A1 ANTENNA DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE 有权
标题翻译：天线装置和磁共振成像装置
公开(公告)号：US20130221968A1
公开(公告)日：2013-08-29
申请号：US13877702
申请日：2011-10-06
申请人： Hideta Habara , Yoshitaka Bito , Hisaaki Ochi , Yoshihisa Soutome , Masayoshi Dohata , Tetsuhiko Takahashi , Hiroyuki Takeuchi
发明人： Hideta Habara , Yoshitaka Bito , Hisaaki Ochi , Yoshihisa Soutome , Masayoshi Dohata , Tetsuhiko Takahashi , Hiroyuki Takeuchi
IPC分类号： G01R33/34
CPC分类号： G01R33/34092 , G01R33/288 , G01R33/34046 , G01R33/3456 , G01R33/3657 , G01R33/422 , H01Q9/065 , H01Q21/20
摘要： There is provided a technique for suppressing increase of SAR without sacrificing sensitivity in RF coils used in MRI apparatuses. The present invention provides an antenna device comprising a sheet-shaped conductor and a ribbon-shaped conductor disposed on the subject side with respect to the sheet-shaped conductor with a predetermined distance from the sheet-shaped conductor. The ribbon-shaped conductor has a meandering shape, and is adjusted so as to resonate at transmission and reception frequencies, and it is constituted so that distance to the sheet-shaped conductor becomes smaller at both end part thereof along the static magnetic field direction compared with the distance to the sheet-shaped conductor at the center thereof. Moreover, the ribbon-shaped conductor is constituted so as to have a smaller width, as the distance to the sheet-shaped conductor becomes smaller.
摘要翻译：提供了抑制SAR增加的技术，而不牺牲MRI装置中使用的RF线圈的灵敏度。本发明提供了一种天线装置，其包括片状导体和布置在与片状导体相距预定距离的片状导体的被检体侧的带状导体。带状导体具有曲折形状，并且被调整为在发送和接收频率下谐振，并且其构造成使得沿着静磁场方向在其两端部处的与片状导体的距离变小与其中心的片状导体的距离。此外，随着与片状导体的距离变小，带状导体构成为具有较小的宽度。

9. 发明授权

US08193810B2 MRI apparatus with RF surface coil having at least three resonance frequencies 有权
标题翻译：具有至少三个共振频率的RF表面线圈的MRI装置
公开(公告)号：US08193810B2
公开(公告)日：2012-06-05
申请号：US12292449
申请日：2008-11-19
申请人： Yosuke Otake , Yoshihisa Soutome , Koji Hirata , Yoshitaka Bito
发明人： Yosuke Otake , Yoshihisa Soutome , Koji Hirata , Yoshitaka Bito
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/34053 , G01R33/34069 , G01R33/341 , G01R33/3415 , G01R33/3635
摘要： An RF coil having at least three different resonance frequencies, wherein one of the resonance frequencies is adjusted to be a frequency fA of a magnetic resonance signal generated by a test subject, and the coil is adjusted so that ratio of difference between the frequency fA and a first frequency fB lower than fA and nearest to fA among the resonance frequencies (fA−fB), and difference between the frequency fA and a second resonance frequency fC higher than fA and nearest to the frequency fA among the resonance frequencies (fC−fA), should be from 0.5 to 2.0. There is provided a technique for receiving magnetic resonance signals always with high detection efficiency by an RF coil of an MRI apparatus even if significant loss is caused in the RF coil, or test subject is changed.
摘要翻译：具有至少三个不同谐振频率的RF线圈，其中谐振频率之一被调整为由测试对象产生的磁共振信号的频率fA，并且调节线圈，使得频率fA与在谐振频率（fA-fB）中比fA低且最接近fA的第一频率fB，以及频率fA与谐振频率（fC-fA）之间的最接近频率fA的fA的第二谐振频率fC之间的差），应为0.5〜2.0。提供了一种用于通过MRI装置的RF线圈始终具有高检测效率的磁共振信号的技术，即使在RF线圈中引起显着的损失，或者测试对象发生变化。

10. 发明申请

US20110121834A1 HIGH-FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING DEVICE 失效
标题翻译：高频线圈和磁共振成像装置
公开(公告)号：US20110121834A1
公开(公告)日：2011-05-26
申请号：US13054474
申请日：2009-07-22
申请人： Yoshihisa Soutome , Hideta Habara , Yoshitaka Bito
发明人： Yoshihisa Soutome , Hideta Habara , Yoshitaka Bito
IPC分类号： G01R33/44
CPC分类号： G01R33/365 , G01R33/3415 , G01R33/3657
摘要： There is provided a high-frequency coil of an MRI device, which can easily and highly reproducibly reduce electromagnetic coupling between adjacent surface coils among a plurality of surface coils disposed with intervals. An electromagnetic decoupling coil that can generate a magnetic flux for canceling a magnetic flux generated by one of the adjacent surface coils and interlinking with the other surface coil is disposed between the adjacent surface coils. The electromagnetic decoupling coil is provided with a capacitor, and is tuned by means of the capacitor so that the electromagnetic coupling should be minimized in such a range that the resonance frequency thereof should be lower than the resonance frequency of the surface coils.
摘要翻译：提供了一种MRI装置的高频线圈，其可以容易且高度可重复地减少间隔设置的多个表面线圈中的相邻表面线圈之间的电磁耦合。可以在相邻的表面线圈之间设置电磁去耦线圈，该电磁去耦线圈可以产生用于消除由相邻的表面线圈之一产生的磁通并与另一个表面线圈相互连接的磁通量。电磁去耦线圈设置有电容器，并通过电容器进行调谐，使得电磁耦合应在其共振频率应低于表面线圈的谐振频率的范围内最小化。

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