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1. 发明专利

DE4091345T1 未知
公开(公告)号：DE4091345T1
公开(公告)日：1991-08-29
申请号：DE4091345
申请日：1990-08-02
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： TAKEUCHI HIROYUKI , NOZOKIDO TATSUO , SEKIHARA KENSUKE , KURODA MASAO , TAKESHIMA HIROTAKA , NAKAMURA CHIKAKO
IPC分类号： A61B5/055 , G01R33/48

2. 发明公开

EP1340456A4 LOW-LEAKAGE MAGNETIC-FIELD MAGNET AND SHIELD COIL ASSEMBLY 审中-公开
标题翻译：随磁场和低漏磁和屏蔽线圈配置
公开(公告)号：EP1340456A4
公开(公告)日：2005-11-09
申请号：EP01271111
申请日：2001-12-04
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： KAKUGAWA SHIGERU , AZUMA KATSUNORI , WAKUDA TSUYOSHI , WADAYAMA YOSHIHIDE , TAKESHIMA HIROTAKA , SAKAKIBARA KENJI , YATSUO TAKESHI , HONMEI TAKAO
IPC分类号： G01R33/38 , G01R33/3815 , G01R33/421 , A61B5/055
CPC分类号： G01R33/421 , G01R33/3806 , G01R33/3815
摘要： A magnet device provided with a shield current carrying means in which two sets of magneto static field generating sources for generating magnetic fields directed toward a first direction are disposed facing each other across a finite region and at least one set of the magnetostatic field generating sources are disposed on at least two almost concentric circles, wherein, on a first plane including a first axis, a second axis and a first point, the first point being a point of intersection between the first axis parallel to the first direction and passing the almost center of the shied current carrying means and the second axis crossing at right angles the first axis and spaced an almost equal distance from the two sets of the generating sources, positive and negative current carrying directions of one set out of two sets of magnetostatic field generating sources or those in respective sets are arranged alternately, when an angle formed by a half line at the n-th point position from the first point to extend toward the geometric center of a section of the shield current carrying means and the first axis is theta n, and the current carrying directions of the shield current carrying means are set in the order of increasing theta n.

3. 发明公开

EP1036541A4 MAGNET APPARATUS AND MRI APPARATUS 审中-公开
标题翻译： MAGNET-GERÄTUND MRI-GERÄT
公开(公告)号：EP1036541A4
公开(公告)日：2005-11-02
申请号：EP98956014
申请日：1998-12-01
申请人： HITACHI MEDICAL CORP , HITACHI LTD
发明人： KAKUGAWA SHIGERU , KITAMURA SHOUJI , HARA NOBUHIRO , KOMURA AKIYOSHI , HINO NORIAKI , KAWANO HAJIME , HONMEI TAKAO , TAKESHIMA HIROTAKA , YATSUO TAKESHI , TAZAKI HIROSHI
IPC分类号： G01R33/38 , G01R33/381 , G01R33/3815 , A61B5/055
CPC分类号： G01R33/3806 , G01R33/381 , G01R33/3815
摘要： A magnet apparatus having two static magnetic field-generating sources constituted by current-carrying means (13 to 16) arranged concentrically to generate a uniform magnetic field directed in the first direction, each static magnetic field generating source having at least four current-carrying means. Assume that a predetermined line (18) lies in a first plane including a first axis extending in parallel with the first direction and passing through near the centers of the current-carrying means, a second axis intersecting the first axis perpendicularly and existing nearly at an equal distance from the second static magnetic field-generating source. When the geometrical center of the cross section of each current-carrying means is projected onto the predetermined straight line (18) on the first plane, the forward and reverse current-carrying directions of the corresponding current-carrying means are alternatingly arranged for each of the static magnetic field-generating sources.
摘要翻译：一种磁体装置，包括两组静磁场产生源，每组静电磁场产生源由同时设置的载流装置构成，以便产生沿第一方向引导的均匀的磁场，该磁场设有至少四个载流装置，假设与第一方向平行的第一轴线的交叉点，并且基本上穿过载流装置的中心，并且第二轴线与第一轴线正交地交叉并且与两组静态的基本上相等的距离磁场产生源作为第一点，并进一步假设包含在由第一轴，第二轴和第一点限定的第一平面上并通过第一点的第一直线，载流装置以这样的方式当在第一平面上的载流装置的横截面的几何中心被投影在第二平面上时在第一直线上，每个静磁场产生源的各个相应的突起处的电流承载装置的当前承载方向在第一直线上在正负方向上交替排列，从而具有开放空间感和可达到在MRI装置中改进了被检查物体。

4. 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

5. 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

6. 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

7. 发明专利

JP2002238874A MAGNET DEVICE AND MAGNETIC RESONANCE IMAGING APPARATUS USING THE SAME, AND ADJUSTER OF MAGNETIC FIELD UNIFORMITY COEFFICIENT, AND METHOD OF ADJUSTING THE MAGNETIC FIELD UNIFORMITY COEFFICIENT 失效
公开(公告)号：JP2002238874A
公开(公告)日：2002-08-27
申请号：JP2001038261
申请日：2001-02-15
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： WADAYAMA YOSHIHIDE , KADOKAWA SHIGERU , WAKUTA TAKESHI , TAKESHIMA HIROTAKA , SAKAKIBARA KENJI , YAO TAKESHI
IPC分类号： G01R33/3815 , A61B5/055 , G01R33/387 , H01F6/00
摘要： PROBLEM TO BE SOLVED: To provide a magnet device, a magnetic resonance imaging apparatus, an adjuster of the magnetic field uniformity coefficient, and a method of adjusting the uniformity coefficient for optimizing the adjusting sensitivity in adjusting the magnetic field uniformity coefficient, adjusting irregular magnetic components in lower orders without detaching/attaching a gradient magnetic coil, improving the work efficiency, and easily performing the work in the fine adjustment of the magnetic field uniformity coefficient in the space for measurement. SOLUTION: The magnet device comprises a pair of magnetic poles facing each other with the space for measurement in-between, superconducting coils disposed around the outer periphery of each magnetic pole, and containers for storing each superconducting coil. In the magnet device, the adjuster of the magnetic field uniformity coefficient including a plurality of magnetic pieces is disposed adjacent to the containers. The adjuster of the magnetic field uniformity coefficient is shaped in a ring consisting of the plurality of magnetic pieces disposed on the same circle or concentric circles relative to the center axis of the magnetic field. The magnetic resonance imaging apparatus has the adjuster of the magnetic field uniformity coefficient, and the magnetic field uniformity coefficient in the space for measurement is adjusted by adjusting the magnetic pieces as the adjuster of the magnetic field uniformity coefficient.

8. 发明专利

JPH09153408A SUPERCONDUCTING MAGNET DEVICE 失效
公开(公告)号：JPH09153408A
公开(公告)日：1997-06-10
申请号：JP33602395
申请日：1995-11-30
申请人： HITACHI MEDICAL CORP , HITACHI LTD
发明人： TAKESHIMA HIROTAKA , KAWANO HAJIME , KADOKAWA SHIGERU , HINO TOKUAKI
IPC分类号： A61B5/055 , G01R33/38 , G01R33/3815 , G01R33/3875 , G01R33/421 , H01F6/00 , H01F7/20
摘要： PROBLEM TO BE SOLVED: To provide a superconducting magnet device, which is provided with a wide aperture, has little leakage magnetic field, is lightweight and can attain a wide and uniform magnetic field region in a high magnetic field intensity. SOLUTION: A static magnetic field generation source of a superconducting magnet device is constituted of two groups of superconducting coils, which are arranged in opposition to each other holding a uniform magnetic field generating region 21 between them, and each group of the coils consists of a main coil 41 for making a current in a constant direction flow, a bucking coil 42 for making a current in the reverse direction to the coil 41 flow and coils 43 and 44 for correction use for correcting the uniform degree of a magnetic field. The diameters of the coils 41 and 42 are roughly equal, the diameter of the coils 43 and 44 is smaller than that of the coil 41, the amount of a current of the coils 43 and 44 is less than that of the coil 41 and the opposed distance between the main coils 41 is formed shorter than that between the coils 42.

9. 发明专利

DE69131940T2 未知
公开(公告)号：DE69131940T2
公开(公告)日：2000-08-17
申请号：DE69131940
申请日：1991-11-15
申请人： SUMITOMO SPEC METALS , HITACHI MEDICAL CORP
发明人： SAKURAI HIDEYA , UZUKI JUNJI , TAKESHIMA HIROTAKA , SATO SHIGERU
IPC分类号： G01R33/383 , H01F7/02 , G01R33/38

10. 发明专利

DE19534130A1 Superconducting agent system for nuclear magnetic resonance tomograph 未知
公开(公告)号：DE19534130A1
公开(公告)日：1996-03-21
申请号：DE19534130
申请日：1995-09-14
申请人： HITACHI MEDICAL CORP
发明人： HOMMEI TAKAO , TAKUMA YUTAKA , TAKESHIMA HIROTAKA , TAKEUCHI HIROYUKI , MIYAMOTO YOSHIYUKI , FUKUTOMI KIYOSHI , KAWANO HAJIME
IPC分类号： G01R33/3815 , G01R33/3875 , H01F6/00 , G01R33/387
摘要： A superconducting magnet system for a magnetic resonance tomograph has a liquid helium cryostatic cooling circuit (11) enclosing a compound multi-layer cylinder (13) which forms the source of a uniform stationary magnetic field. The cylinder (13) is built up by interleaving 1 mm sheets of Niobium, Titanium and copper supported by the fixtures (14a 14b) such as to be concentric with a tubular EM coil (16) energised from a source (15). In operation the coil induces a steady circulating current in the cylinder (13) which is permanently maintained at cryostatic temperatures to generate a uniform field along the axis (39) and unable withdrawal of the coil (16) to create diagnostic space.

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