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1. 发明专利

JP2008125893A Electromagnet apparatus and magnetic resonance imaging apparatus 有权
标题翻译：电磁设备和磁共振成像设备
公开(公告)号：JP2008125893A
公开(公告)日：2008-06-05
申请号：JP2006315907
申请日：2006-11-22
申请人： Hitachi Ltd , Hitachi Medical Corp , 株式会社日立メディコ , 株式会社日立製作所
发明人： ABE MITSUJI , WATANABE HIROYUKI , TAKESHIMA HIROTAKA
IPC分类号： A61B5/055 , G01R33/381 , H01F6/00 , H01F7/20
CPC分类号： G01R33/3806 , G01R33/3815 , H01F7/202
摘要： PROBLEM TO BE SOLVED: To provide a downsized/lightweight electromagnetic apparatus and magnetic resonance imaging apparatus by removing unnecessary constitution as much as possible in the electromagnet apparatus generating a static magnetic field perpendicularly to the insertion direction of a subject. SOLUTION: This electromagnet apparatus includes a first coil 31 in which a first ring current J1 circulates in a forward direction, a second coil 32 in which a second ring current J2 circulates in an inverse direction, and coil group 30 in which a plurality of ring currents J3-J6 circulates alternately in the forward direction and the inverse direction; and the first coil 31, the second coil 32 and the coil group 30 are so disposed that the elevation angles θ increase in this order (θ1 COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：通过在垂直于被检体的插入方向产生静磁场的电磁铁装置中尽可能地去除不必要的结构来提供小型化/轻量化的电磁装置和磁共振成像装置。解决方案：该电磁铁装置包括第一环形电流J1沿正向循环的第一线圈31，第二环形电流J2沿相反方向循环的第二线圈32和线圈组30，其中，多个环形电流J3-J6在正向和反向交替地循环; 并且第一线圈31，第二线圈32和线圈组30被设置成使仰角θ依次增加（θ1<θ2<θ3），和不包括第二线圈32和线圈的空白区域S 组30存在于夹紧仰角θ2和仰角θ3的角度区域中。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2008012118A Magnetic resonance imaging system 有权
标题翻译：磁共振成像系统
公开(公告)号：JP2008012118A
公开(公告)日：2008-01-24
申请号：JP2006187329
申请日：2006-07-07
申请人： Hitachi Ltd , Hitachi Medical Corp , 株式会社日立メディコ , 株式会社日立製作所
发明人： KUROME AKIRA , TAKESHIMA HIROTAKA , YAO TAKESHI , OBARA TAKAYUKI , HIGUCHI YOSHIYA
IPC分类号： A61B5/055 , G01R33/3873
摘要： PROBLEM TO BE SOLVED: To suppress a temperature variation of a shim tray by reducing the conduction quantity of heat caused the convection and radiation between a gradient magnetic field coil and shim iron.
SOLUTION: This magnetic resonance imaging system is equipped with a static magnetic field generating means for generating a static magnetic field, a gradient magnetic field generating means for generating the gradient magnetic field in the space of the static magnetic field, a uniformity adjusting means having the shim tray which holds a shim member for adjusting the uniformity of the static magnetic field and arranged between the static magnetic field generating means and the gradient magnetic field generating means and a means for suppressing the temperature variation of the shim member.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：通过减少导致梯度磁场线圈和垫片铁之间的对流和辐射的热传导量来抑制垫片的温度变化。解决方案：该磁共振成像系统配备有用于产生静磁场的静磁场产生装置，用于在静磁场的空间中产生梯度磁场的梯度磁场产生装置，均匀性调节具有保持用于调整静磁场的均匀性并设置在静磁场产生装置和梯度磁场产生装置之间的垫片的垫片的装置和用于抑制垫片构件的温度变化的装置。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2006334050A Magnetic resonance imaging apparatus 审中-公开
标题翻译：磁共振成像装置
公开(公告)号：JP2006334050A
公开(公告)日：2006-12-14
申请号：JP2005160897
申请日：2005-06-01
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： YAMAMIZU TAKU , TAKEUCHI HIROYUKI , TAKESHIMA HIROTAKA , TOMIZAWA KAZUNORI
IPC分类号： A61B5/055
摘要： PROBLEM TO BE SOLVED: To realize a magnetic resonance imaging apparatus which is effective for imaging methods other than the EPI method and can reduce noises associated with the vibration of an inclined magnetic field coil without affecting fast imaging.
SOLUTION: In the sequence wherein current pulses cyclically applied to the inclined magnetic field coil 13 exist, current values × application time in the waveforms of the current pulses adjacent to each other is fixed but the current values are given values different from those of the application time. The application time is varied within a range affecting none of TE and TR. This can lower the peak of the spectrum of the applied currents to the inclined magnetic field coil 13, thereby causing a drop in the noise levels.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：实现对EPI方法以外的成像方法有效的磁共振成像装置，能够减少与倾斜磁场线圈的振动有关的噪声，而不影响快速成像。解决方案：在存在电流脉冲循环施加到倾斜磁场线圈13的顺序中，电流值×彼此相邻的电流脉冲的波形中的施加时间是固定的，但是给定电流值不同于的申请时间。应用时间在不影响TE和TR的范围内变化。这可以将施加的电流的频谱的峰值降低到倾斜磁场线圈13，从而导致噪声水平的下降。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2005152420A Magnetic resonance imaging apparatus 审中-公开
标题翻译：磁共振成像装置
公开(公告)号：JP2005152420A
公开(公告)日：2005-06-16
申请号：JP2003397475
申请日：2003-11-27
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： YAO TAKESHI , IKEDA SHIGEYUKI , TAKESHIMA HIROTAKA , YOSHINO HITOSHI
IPC分类号： G01R33/28 , A61B5/055
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus with a silencing function, capable of effectively eliminating noise by generating a sound field from an added sound source.
SOLUTION: The magnetic resonance imaging apparatus uses a first transfer function expressing the transfer characteristics of the sound generated by a gradient magnetic field generating means before reaching the ears of a subject as the relation with the positional coordinates of the ears of the subject, and a second transfer function, which is the inverse function of the transfer function expressing the transfer characteristics of the sound field generated by the added sound source before reaching the ears of the subject. When the sound reaches the ear position, the sound field of the opposite phase and the same amplitude relative to the noise is calculated, and the added sound source is made to generate the calculated sound field.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供具有消音功能的磁共振成像装置，能够通过从附加声源产生声场来有效地消除噪音。解决方案：磁共振成像装置使用表示由梯度磁场产生装置产生的声音的传递特性的第一传递函数，作为与被检体的耳朵的位置坐标的关系，在到达被检体的耳朵之前以及第二传递函数，其是表示在到达被摄体的耳朵之前由所添加的声源产生的声场的传播特性的传递函数的反函数。当声音到达耳朵位置时，计算出相反相位和相对于噪声幅度相同的声场，并且使附加的声源产生计算出的声场。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2005111058A Superconducting magnet for nuclear magnetic resonance imaging device 有权
标题翻译：用于核磁共振成像装置的超导磁体
公开(公告)号：JP2005111058A
公开(公告)日：2005-04-28
申请号：JP2003350762
申请日：2003-10-09
申请人： Hitachi Ltd , Hitachi Medical Corp , 株式会社日立メディコ , 株式会社日立製作所
发明人： WADAYAMA YOSHIHIDE , WATANABE HIROYUKI , TAKESHIMA HIROTAKA
IPC分类号： G01R33/3815 , A61B5/055 , F25B9/00 , H01F6/00 , H01F6/04
摘要： PROBLEM TO BE SOLVED: To provide a superconducting magnet for MRI whose operation time is long even in the state that an extremely low temperature refrigerator is stopped, in a magnet for open type MRI for which superconducting coils are oriented opposingly in the vertical direction. SOLUTION: A gaseous helium storage container is provided inside a liquid helium storage container and pressure piping is connected. Since the storage container has a structure that the lower part is opened and the upper part is closed, evaporated gaseous helium is captured and stored. As a result, the evaporated gaseous helium pushes up the liquid level of liquid helium, and hence the temperature rise of the superconducting coil due to liquid level decline is suppressed. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：即使在极低温制冷机停止的状态下，为了提供超导磁体，其操作时间长，在用于开放型MRI的磁体中，超导线圈在垂直方向上相对定向方向。
解决方案：在液氦储存容器内设置气态氦储存容器，并连接压力管道。由于储存容器具有下部打开并且上部被封闭的结构，所以蒸发的气态氦被捕获并储存。结果，蒸发的气态氦气使液氦液面升高，抑制了液面下降引起的超导线圈的温度上升。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2005066320A Gradient magnetic field coil 审中-公开
标题翻译：梯度磁场线圈
公开(公告)号：JP2005066320A
公开(公告)日：2005-03-17
申请号：JP2004171972
申请日：2004-06-10
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： KUROME AKIRA , YAO TAKESHI , TAKESHIMA HIROTAKA
IPC分类号： G01R33/421 , A61B5/055 , G01R33/385 , H01F7/20
摘要： PROBLEM TO BE SOLVED: To provide a gradient magnetic field coil for easily reducing vibration and noise generated when the gradient magnetic field coil of an MRI apparatus is driven.
SOLUTION: An intermediate part 23, which is between the main coil 21 generating a gradient magnetic field and the shield coil 22 canceling the magnetic flux and supports them, has a three-layered structure composed of surface plates 232, 233, and a honeycomb core material 231 between them.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供梯度磁场线圈，用于容易地减少当MRI装置的梯度磁场线圈被驱动时产生的振动和噪声。解决方案：在产生梯度磁场的主线圈21和屏蔽线圈22之间取消磁通并支撑它们的中间部分23具有由表面板232,233和3构成的三层结构它们之间的蜂窝芯材231。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2004194974A Magnetic resonance imaging apparatus 有权
公开(公告)号：JP2004194974A
公开(公告)日：2004-07-15
申请号：JP2002368109
申请日：2002-12-19
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： KUROME AKIRA , TAKESHIMA HIROTAKA
IPC分类号： G01R33/385 , A61B5/055 , G01R33/28
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus with reduced noise from a gradient magnetic field coil.
SOLUTION: A shut-off mechanism 6 made of a polymeric material such as rubber and urethane foam with a sheet-shaped attenuation material 10 between an RF base board 6 and a high frequency magnetic field coil 5 attached on the RF base board is provided on a homogeneous magnetic field zone 25 side of the gradient magnetic field coil 4 for shutting off the noise from the gradient magnetic field coil 4. In addition, an attenuation mechanism 11 of a silencer of the reactance type for silencing the sonic waves by intervention as a silencer, categorized simply as a simple dilatation type, is provided on the opposite side of the homogeneous magnetic field zone 25 of the gradient magnetic field coil 4.
COPYRIGHT: (C)2004,JPO&NCIPI

8. 发明专利

JP2004016657A Magnetic resonance imaging apparatus 有权
公开(公告)号：JP2004016657A
公开(公告)日：2004-01-22
申请号：JP2002178898
申请日：2002-06-19
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： SAKAKIBARA KENJI , TAKESHIMA HIROTAKA , YAO TAKESHI
IPC分类号： G01R33/3873 , A61B5/055 , H01F7/20
摘要： PROBLEM TO BE SOLVED: To realize a magnetic resonance imaging apparatus wherein opening property of a magnetic structure is improved by improving the correction of heterogeneity of a static magnetic field generated in a photographing space.
SOLUTION: An open magnet 1 is provided with a generation source of the static magnetic field, which comprises magnetic poles 4a and 4b where annular ferromagnetic bodies 5a and 5b are formed. The magnetic poles 4a and 4b generate the static magnetic field in a volume space on the side of surfaces opposing each other. On opposite sides of the opposing surfaces of the magnetic poles 4a and 4b, sheet-like yokes 2a and 2b are magnetically connected via the generation source of the static magnetic field, and the sheet-like yokes 2a and 2b are magnetically connected with each other by a pillar-shaped yoke 6. For the magnetic pole 4a-1 positioned on the side of an opening part and the magnetic pole 4a-2 positioned on the side of the pillar-shaped yoke 6 among the magnetic poles 4a, ferromagnetic materials having different magnetic characteristics are used. For an annular protrusion 5a-1 positioned on the side of the opening part and an annular protrusion 5a-2 positioned on the side of the pillar-shaped yoke 6 among the annular protrusions 5a, ferromagnetic materials having different magnetic characteristics are used.
COPYRIGHT: (C)2004,JPO

9. 发明专利

JP2003325471A Magnetic resonance imaging apparatus 审中-公开
标题翻译：磁共振成像装置
公开(公告)号：JP2003325471A
公开(公告)日：2003-11-18
申请号：JP2002136416
申请日：2002-05-13
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： TAKESHIMA HIROTAKA , SUZUKI TSUTOMU
IPC分类号： G01R33/28 , A61B5/055 , G01R33/389
摘要： PROBLEM TO BE SOLVED: To eliminate works to handle cables or the like for supplying electric power to a magnetic resonance imaging apparatus movable in an MRI room and for exchanging control signals.
SOLUTION: The magnetic resonance imaging apparatus is divided into a gantry means and a control means. When images are taken, the gantry means is moved around a bed to load a subject, and a first and a second connector means are coupled there. When no image is taken, the gantry means is removed to a place away from the subject, and the first and a third connector means are coupled there. Various kinds of signals are exchanged between the gantry means and the control means and electric power is supplied through the first and the second connector means coupled mutually when the images are taken. Electric power is supplied to a temperature control means or the like to maintain a state of temperature or the like of a magnetic field generating means or the like on the gantry means through the first and the third connector means coupled mutually when no image is taken.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：消除用于处理电缆等的用于向在MRI室中移动的磁共振成像设备提供电力并用于交换控制信号的工作。磁共振成像装置分为台架装置和控制装置。当拍摄图像时，台架装置围绕床移动以加载对象，并且第一和第二连接器装置耦合在那里。当没有拍摄图像时，机架装置被移除到远离被摄体的位置，并且第一和第三连接器装置连接在那里。在台架装置和控制装置之间交换各种信号，并且通过在拍摄图像时相互耦合的第一和第二连接器装置提供电力。电力被提供给温度控制装置等，以在不采用图像时相互耦合的第一和第三连接器装置将机架装置中的磁场产生装置等的温度等的状态保持在台架装置上。版权所有（C）2004，JPO

10. 发明专利

JP2003325470A Magnetic resonance imaging apparatus 审中-公开
标题翻译：磁共振成像装置
公开(公告)号：JP2003325470A
公开(公告)日：2003-11-18
申请号：JP2002136415
申请日：2002-05-13
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： TAKESHIMA HIROTAKA , WATABE SHIGERU , TAKAHASHI TETSUHIKO , SUZUKI TSUTOMU
IPC分类号： G01R33/28 , A61B5/055
摘要： PROBLEM TO BE SOLVED: To eliminate troubles in setting to position a gantry, and to enables easy and quick transitions between image taking and surgery.
SOLUTION: A gantry means constituting a magnetic resonance imaging apparatus is removed to a place away from a subject when no image is taken such as during surgery. The gantry is moved close to a bed to load the subject by a movement control means, and the positioning of an imaging site is performed when images are taken. After the positioning of the imaging site, desired sectional images are taken by controlling a control means. After taking images, the gantry means is removed to an original retreat position or a position where the gantry means hardly bothers the surgery or the like.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：消除设置台架的麻烦，并使图像拍摄和手术之间方便快捷的过渡。解决方案：构成磁共振成像装置的台架装置在没有图像被摄取的情况下被移除到远离受试者的地方，例如在手术过程中。台架移动靠近床以通过移动控制装置加载对象，并且在拍摄图像时执行成像部位的定位。在成像部位的定位之后，通过控制控制装置获取所需的截面图像。拍摄图像后，龙门架装置被移除到原来的撤退位置或机架意味着几乎不打扰手术等的位置。版权所有（C）2004，JPO

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