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1. 发明专利

JP2005021325A Qd coil for magnetic resonance imaging equipment 有权
标题翻译：用于磁共振成像设备的QD线圈
公开(公告)号：JP2005021325A
公开(公告)日：2005-01-27
申请号：JP2003189420
申请日：2003-07-01
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： SUZUKI SHINICHIRO , SHIMODA TAKAHIDE
IPC分类号： G01R33/34 , A61B5/055
摘要： PROBLEM TO BE SOLVED: To provide a QD (Quadrature Detection) coil for magnetic resonance imaging equipment in which unstabilization of the impedance characteristic of a coil and lowering of a sharpness Q value of resonance due to influence of coaxial cables connected to the feeding points of the QD coil, multi-element coils in particular is prevented.
SOLUTION: Between two feeding points of the QD coil, the multi-element coils in particular and baluns provided on the coaxial cables connected there, inductance which connects the ground lines of the two coaxial cables is arranged. Thus, a circuit formed by the inductance and the capacitor of a coil in a parallel relation becomes a parallel resonance circuit to a signal with the nuclear magnetic resonance frequency of the MRI equipment for preventing the signal from being leaked from one of the feeding points to the other.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供用于磁共振成像设备的QD（正交检测）线圈，其中线圈的阻抗特性的不稳定性以及由于同轴电缆的连接所引起的谐振的清晰度Q值的降低 QD线圈的馈电点，特别是防止多元件线圈。
解决方案：在QD线圈的两个馈电点之间，特别是连接在同轴电缆上的多元件线圈和平衡 - 不平衡变压器布置有连接两根同轴电缆的接地线的电感。因此，由并联的线圈的电感和电容器形成的电路成为具有MRI设备的核磁共振频率的信号的并联谐振电路，用于防止信号从馈电点之一泄漏到另一个。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2009022562A High frequency coil for magnetic resonance imaging device and magnetic resonance imaging device using the same 有权
标题翻译：用于磁共振成像装置的高频线圈和使用其的磁共振成像装置
公开(公告)号：JP2009022562A
公开(公告)日：2009-02-05
申请号：JP2007189474
申请日：2007-07-20
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： SUZUKI SHINICHIRO , SHIMODA TAKAHIDE , TANIGUCHI TAKESHI
IPC分类号： A61B5/055 , G01R33/34
摘要： PROBLEM TO BE SOLVED: To provide a high frequency coil for a magnetic resonance imaging device, which has uniform sensitivity distribution in a central area and has excellent power efficiency. SOLUTION: An intermediate ring conductor 102 is disposed between an outer ring conductor 101 and an inner ring conductor 103 of a barcode gauge coil on a plane surface. When power is supplied by resonance frequency from a power supply point 71, a pattern of direction of current flowing the intermediate ring conductor 102 is the same as a pattern of direction of current flowing the inner ring conductor 103. Thus, a magnetic field (sensitivity) occurring by current flowing the intermediate ring conductor and the inner ring conductor becomes identical in polarity and are superposed each other, thereby flattening the sensitivity of an area between the intermediate ring conductor and the inner ring conductor. Also, the magnetic field (sensitivity) occurred by the outer ring conductor is equal to that occurred when there is no intermediate ring conductor, so that power efficiency does not decrease. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于磁共振成像装置的高频线圈，其在中心区域具有均匀的灵敏度分布并且具有优异的功率效率。解决方案：中间环导体102设置在平面上的条形码计线圈的外环导体101和内环导体103之间。当通过谐振频率从电源点71供电时，中间环形导体102流动的电流方向的图案与流过内环导体103的电流方向相同。因此，磁场（灵敏度）通过电流流过中间环导体和内环导体而发生极性相同并且彼此叠置，从而使中间环导体和内环导体之间的区域的灵敏度变平。此外，外环导体发生的磁场（灵敏度）等于当没有中间环形导体时发生的磁场（灵敏度），使得功率效率不降低。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JP2004081514A Magnetic resonance imaging apparatus 审中-公开
公开(公告)号：JP2004081514A
公开(公告)日：2004-03-18
申请号：JP2002246653
申请日：2002-08-27
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： NAGAI SHIZUKA , SUZUKI SHINICHIRO
IPC分类号： G01R33/3415 , A61B5/055 , G01R33/36
摘要： PROBLEM TO BE SOLVED: To realize a magnetic resonance imaging apparatus capable of suppressing the mutual interference of a plurality of receiving coils even if the distance between the coils or the shape of the coils are changed to obtain an image of good quality.
SOLUTION: The application of voltage across both terminals of a variable capacity diode VC is stopped. One of the receiving coils 14a and 14b is set to a non-resonance state and the other one of them is set to a resonance state. The receiving signal value of the coil 14b is measured to be stored in a memory means. A Bias 4 and a Bias 3 are set to an energized state and the coil 14a is set to the resonance state to obtain a magnetic resonance signal. The supply voltage values from a variable power supply voltage Bias 1 are made variable to change the capacity of the diode VC and the intensity of the magnetic risonance signal is measured to judge whether a signal becoming maximum is present. When the magnetic resonance signal becoming maximum is obtained, the supply voltage value from the variable power supply voltage Bias 1 at that time is set. In this voltage value state, the photographing of a specimen is started.
COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2013111126A Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：JP2013111126A
公开(公告)日：2013-06-10
申请号：JP2011258228
申请日：2011-11-25
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： NAKA YASUHIRO , SUZUKI SHINICHIRO
IPC分类号： A61B5/055 , G01R33/34
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus enhanced in the connection reliability of the electronic parts mounted on a substrate by suppressing the vibration of the substrate fixed on the surface of an RF coil and having a wide subject space.SOLUTION: The magnetic resonance imaging apparatus is constituted by using a magnetic resonance phenomenon and includes cylindrical inclined magnetic field coils, an RF coil 2 which is internally provided in the inclined magnetic field coil and has a cylindrical shape and of which the cross-section vertical to the center axis direction has a flat shape, a substrate 12 fixed on the surface of the RF coil 2 between both coils and having a plurality of electronic parts 28 and 29 connected thereto, and a reinforcing plate 19 bonded to the surface on the side opposite to the mounting surfaces of the electronic parts 28 and 29 of the substrate 12 through a first self-adhesive material 21a.
摘要翻译：解决的问题：通过抑制固定在RF线圈的表面上的基板的振动并且具有宽的被摄体空间来提供增强安装在基板上的电子部件的连接可靠性的磁共振成像装置。解决方案：磁共振成像装置由磁共振现象构成，包括圆柱形倾斜磁场线圈，RF线圈2，其内部设置在倾斜磁场线圈中并且具有圆柱形状，并且十字形垂直于中心轴方向的截面具有平坦的形状，固定在两个线圈之间的RF线圈2的表面上并且具有连接到其上的多个电子部件28和29的基板12以及粘合到该表面的加强板19 通过第一自粘合材料21a与基板12的电子部件28和29的安装表面相对的一侧。版权所有（C）2013，JPO＆INPIT

5. 发明专利

JP2008194180A Switching circuit for high power rf circuit and magnetic resonance imaging apparatus 有权
标题翻译：高功率射频电路和磁共振成像装置的切换电路
公开(公告)号：JP2008194180A
公开(公告)日：2008-08-28
申请号：JP2007031164
申请日：2007-02-09
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： SUZUKI SHINICHIRO
IPC分类号： A61B5/055 , G01R33/36
摘要： PROBLEM TO BE SOLVED: To provide a switching circuit for an RF circuit of an MRI apparatus capable of blocking large high frequency current passing when conducting a diode and improving isolation when not conducting it.
SOLUTION: A transmission circuit 5 is connected through a diode D2 and a capacitor C4 to a transmission/reception coil 7, and a reception circuit 9 and a protective circuit 8 are connected to the transmission/reception coil 7. D0 and D1 are serially connected at polarities opposite to each other between a transmission line and the ground and C0 is inserted between the diodes D0 and D1. A bias power source 6 for controlling the switching of the D2 is connected holding the D2 there between and a bias power source 1 is connected holding the D0 and C0 there between. A low-pass filter circuit 2 is connected holding the C0 and D1 there between. Control is performed so as to conduct the bias current of the D2 and not to conduct the bias current of the D0 and D1 for the time of transmission, and so as not to conduct the bias current of the D2 and to conduct the bias current of the D0 and D1 for the time of reception.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种MRI装置的RF电路的切换电路，能够在导通二极管时阻挡大的高频电流通过，并且在不进行二极管时改善隔离。解决方案：发送电路5通过二极管D2和电容器C4连接到发送/接收线圈7，并且接收电路9和保护电路8连接到发送/接收线圈7.D0和D1 在传输线和地之间以相反的极性串联连接，而C0插在二极管D0和D1之间。用于控制D2的开关的偏置电源6连接在其上保持D2，并且连接偏置电源1之间保持D0和C0。连接有一个低通滤波器电路2，保持C0和D1之间。执行控制以便传导D2的偏置电流，并且在传输时不传导D0和D1的偏置电流，并且不导通D2的偏置电流并且导通接收时间的D0和D1。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2003159229A MAGNETIC RESONANCE IMAGING APPARATUS 审中-公开
公开(公告)号：JP2003159229A
公开(公告)日：2003-06-03
申请号：JP2001364258
申请日：2001-11-29
申请人： HITACHI MEDICAL CORP
发明人： SUZUKI SHINICHIRO
IPC分类号： G01R33/34 , A61B5/055
摘要： PROBLEM TO BE SOLVED: To reduce desensitization in reception of a quadrature (QD) coil. SOLUTION: A magnetic resonance imaging apparatus applies a high-frequency pulse to a subject 1 placed in a magnetostatic space, so as to excite the subject 1, detects a magnetic resonance signal generated by this excitation by using a receiving coil 14b, and reconstitutes an image in accordance with a detection signal which is detected by the receiving coil 14b. The magnetic resonance imaging apparatus is characterized as follows: the receiving coil 14b is equipped with a solenoid coil 32 with a plurality of turns and a saddle coil 31 with a plurality of turns, which has a coil axis orthogonal to a coil axis of the solenoid coil 32; and each turn of at least either of the solenoid coil 32 and the saddle coil 31 is provided with a variable capacitor 23 for adjusting a series capacitance of each turn thereof. COPYRIGHT: (C)2003,JPO

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