-
1.发明授权Magnetic resonance imaging antennas with spiral coils and imaging methods employing the same 失效具有螺旋线圈的磁共振成像天线及其采用的成像方法
公开(公告)号：US5050605A
公开(公告)日：1991-09-24
申请号：US337041
申请日：1989-04-12
IPC分类号： A61B5/055 , G01R33/34 , G01R33/341
CPC分类号： G01R33/34053 , A61B5/055 , G01R33/34046 , G01R33/34061 , G01R33/341
摘要： An antenna structure for magnetic resonance imaging includes a plurality of spiral wound, generally planar coils spaced axially from one another. The plural coils may be mounted on a rigid frame in the desired relative positions and the subject may be inserted in the space defined by the frame. Alternatively, the individual coils can be separately supported on the subject, as by mounting the coils to the subject. Desirably, a part of the subject's body extends through central apertures in one or more of the coils.
摘要翻译： 用于磁共振成像的天线结构包括彼此轴向间隔开的多个螺旋缠绕的大致平面的线圈。 多个线圈可以安装在所希望的相对位置的刚性框架上，并且被摄体可以插入由框架限定的空间中。 或者，单独的线圈可以单独地支撑在被摄体上，如通过将线圈安装到被摄体。 理想地，受试者的身体的一部分延伸穿过一个或多个线圈中的中心孔。
-
公开(公告)号：US6028429A
公开(公告)日：2000-02-22
申请号：US895674
申请日：1997-07-17
CPC分类号： G01R33/3642 , G01R33/34061
摘要： An antenna system for a magnetic resonance imaging apparatus has an active coil connected between a transmitter or receiver and ground and also has an isolated loop coil which is not conductively connected to ground. The isolated loop coil preferably overlies the electrically conductive pole surface of the field magnet. The isolated loop coil is inductively coupled to the active coil. The assembly has relatively low parasitic capacitance to ground and hence can be tuned to the resonant frequencies required for high field strength imaging.
摘要翻译： 用于磁共振成像装置的天线系统具有连接在发射器或接收器和地之间的有源线圈，并且还具有不与地面导电连接的隔离环形线圈。 绝缘环线圈优选地覆盖在场磁体的导电极表面上。 隔离环路线圈感应耦合到有源线圈。 该组件具有相对较低的对地的寄生电容，因此可以调谐到高场强成像所需的谐振频率。
-
3.发明授权
公开(公告)号：US5939883A
公开(公告)日：1999-08-17
申请号：US683623
申请日：1996-07-17
CPC分类号： G01R33/3642 , G01R33/34061 , G01R33/34069 , G01R33/341 , G01R33/3657
摘要： In magnetic resonance imaging ("MRI"), RF power is applied to a region of interest within the patient by a local antenna disposed adjacent the region of interest. The local antenna is excited by RF signals sent through free space from a principal antenna mounted to the primary field magnet of the MRI system. The principal antenna includes one or more loops mounted so that the plane of the loop is transverse to the pole pieces of the magnet frame and so that the plane of the loop is transverse to adjacent metallic portions of the frame. The loops are aligned with openings in the frame so that a patient is advanced into a frame through the loop. The loops do not substantially obstruct axis to the subject receiving space.
摘要翻译： 在磁共振成像（“MRI”）中，通过邻近感兴趣区域布置的局部天线将RF功率施加到患者内的感兴趣区域。 本地天线通过从安装到MRI系统的主场磁体的主天线通过自由空间发送的RF信号激发。 主天线包括一个或多个环，其安装成使得环的平面横向于磁体框架的极片，并且使得环的平面横向于框架的相邻金属部分。 环路与框架中的开口对准，使患者通过环路进入框架。 环路基本上不妨碍对象接收空间的轴线。
-
公开(公告)号：US06847210B1
公开(公告)日：2005-01-25
申请号：US09738235
申请日：2000-12-15
IPC分类号： G01R33/34 , G01R33/341 , G01R33/3415 , G01V3/00
CPC分类号： G01R33/3415 , G01R33/341 , G01R33/3678
摘要： Antennas for use in magnetic resonance imaging (“MRI”) comprise a coaxial cable unit having an inner conductor tuned to a frequency, typically the Larmor frequency of the species of interest, and an outer conductor substantially surrounding the inner conductor and also tuned to the frequency. The inner and outer conductors are inductively coupled. The antennas may be used as receiving and transmitting antennas. In a receiving antenna, the inner conductor provides an output of the antenna. In a transmitting antenna, an input is provided to the inner conductor. Antenna arrays of one or more coaxial cable units, wherein the inner conductors of each unit are electrically connected and the outer conductors are electrically connected, and the units are inductively coupled, may be provided. Additional coaxial cable units may also be provided, inductively coupled to adjacent coaxial cable units. Each coaxial cable unit may comprise multiple inner conductors. A second outer conductor may be provided substantially surrounding the first outer conductor, tuned to the frequency and including holes through the second outer conductor. A hand, wrist and toe antenna array and a head antenna array are disclosed. Magnetic resonance imaging systems incorporating the antennas of the present invention, are also disclosed.
摘要翻译： 用于磁共振成像（“MRI”）的天线包括同轴电缆单元，其具有调谐到频率的内部导体，通常是感兴趣的物种的拉莫尔频率，以及基本上围绕内部导体的外部导体，并且还被调谐到 频率。 内导体和外导体电感耦合。 天线可以用作接收和发射天线。 在接收天线中，内部导体提供天线的输出。 在发射天线中，向内导体提供输入。 一个或多个同轴电缆单元的天线阵列，其中每个单元的内部导体电连接，并且外部导体电连接，并且可以提供电感耦合的单元。 还可以提供附加的同轴电缆单元，电感耦合到相邻的同轴电缆单元。 每个同轴电缆单元可以包括多个内部导体。 可以设置第二外部导体，其基本上围绕第一外部导体，调谐到频率并且包括穿过第二外部导体的孔。 公开了一种手，腕和脚趾天线阵列和头天线阵列。 还公开了并入本发明的天线的磁共振成像系统。
-
5.发明授权公开(公告)号：US06229310B1
公开(公告)日：2001-05-08
申请号：US09288722
申请日：1999-04-09
IPC分类号： G01V300
CPC分类号： G01R33/3642 , G01R33/34061 , G01R33/34069 , G01R33/341 , G01R33/3657
摘要： In magnetic resonance imaging (“MRI”), RF power is applied to a region of interest within the patient by a local antenna disposed adjacent the region of interest. The local antenna is excited by RF signals sent through free space from a principal antenna mounted to the primary field magnet of the MRI system. The principal antenna includes one or more loops mounted so that the plane of the loop is transverse to the pole pieces of the magnet frame and so that the plane of the loop is transverse to adjacent metallic portions of the frame. The loops are aligned with openings in the frame so that a patient is advanced into a frame through the loop. The loops do not substantially obstruct axis to the subject receiving space.
摘要翻译： 在磁共振成像（“MRI”）中，通过邻近感兴趣区域布置的局部天线将RF功率施加到患者内的感兴趣区域。 本地天线通过从安装到MRI系统的主场磁体的主天线通过自由空间发送的RF信号激发。 主天线包括一个或多个环，其安装成使得环的平面横向于磁体框架的极片，并且使得环的平面横向于框架的相邻金属部分。 环路与框架中的开口对准，使患者通过环路进入框架。 环路基本上不妨碍对象接收空间的轴线。
-
公开(公告)号：US07573432B1
公开(公告)日：2009-08-11
申请号：US11473765
申请日：2006-06-23
CPC分类号： G01R33/3415 , G01R33/341 , G01R33/3678
摘要： In one example, an antenna is disclosed comprising a first, outer conductor, at least one inner conductor within the first outer conductor, and a second outer conductor surrounding the first outer conductor. The second outer conductor may define a plurality of holes therethrough. The at least one inner conductor may comprise a plurality of inner conductors. At least two of the plurality of inner conductors may be connected to each other in series, across a capacitor. At least two of the plurality of inner conductors may be connected to each other in parallel, across a capacitor. The at least one inner conductor may be sufficiently surrounded by the first outer conductor to shield the inner conductor from receiving a radiofrequency signal.
摘要翻译： 在一个示例中，公开了一种天线，其包括第一外部导体，第一外部导体内的至少一个内部导体和围绕第一外部导体的第二外部导体。 第二外部导体可以限定穿过其中的多个孔。 至少一个内部导体可以包括多个内部导体。 多个内部导体中的至少两个可以跨过电容器彼此串联连接。 多个内部导体中的至少两个可以跨过电容器并联连接。 至少一个内部导体可以被第一外部导体充分地围绕，以屏蔽内部导体以接收射频信号。
-
公开(公告)号：US06636040B1
公开(公告)日：2003-10-21
申请号：US09738236
申请日：2000-12-15
申请人： Gregory Eydelman
发明人： Gregory Eydelman
IPC分类号： G01V300
CPC分类号： G01R33/34053 , G01R33/34046 , G01R33/3415 , G01R33/345 , G01R33/3678
摘要： An MRI antenna is disclosed comprising a first coaxial cable unit comprising a first inner conductor with first and second ends and a first outer conductor substantially surrounding the inner conductor. The first outer conductor has first and second ends. The first coaxial cable unit has a concave curvature facing a first direction. A second coaxial cable unit is provided comprising an inner conductor with first and second ends and an outer conductor substantially surrounding the inner conductor. The outer conductor has first and second ends and the second coaxial cable unit has a concave curvature facing a second direction opposite the first direction. The concave curvature of the first and second coaxial cable units generally face each other to define a region for receiving a body part. The first end of the first inner conductor is connected to the first end of the second inner conductor through a first capacitor. The first end of the first outer conductor is connected to the first end of the second outer conductor through a second capacitor. The second end of the first inner conductor and the second end of the second inner conductor are not connected to each other and the second end of the first outer conductor and the second end of the second outer conductor are not connected to each other. The first and second outer conductor provide an output of the antenna. Additional coaxial cable units may be electrically connected to the first or second coaxial cable units. An antenna array of five coaxial cable units is disclosed for imaging the lumbar spine. Transmitting antennas and magnetic resonance imaging systems are also disclosed.
摘要翻译： 公开了一种MRI天线，包括第一同轴电缆单元，其包括具有第一和第二端的第一内部导体和基本上围绕内部导体的第一外部导体。 第一外部导体具有第一和第二端。 第一同轴电缆单元具有面向第一方向的凹曲率。 提供第二同轴电缆单元，其包括具有第一和第二端的内部导体和基本上围绕内部导体的外部导体。 外导体具有第一端和第二端，并且第二同轴电缆单元具有面向与第一方向相反的第二方向的凹曲率。 第一和第二同轴电缆单元的凹曲面通常彼此面对以限定用于容纳主体部分的区域。 第一内部导体的第一端通过第一电容器连接到第二内部导体的第一端。 第一外部导体的第一端通过第二电容器连接到第二外部导体的第一端。 第一内部导体的第二端和第二内部导体的第二端不彼此连接，并且第一外部导体的第二端和第二外部导体的第二端不彼此连接。 第一和第二外导体提供天线的输出。 另外的同轴电缆单元可以电连接到第一或第二同轴电缆单元。 公开了五个同轴电缆单元的天线阵列，用于对腰椎进行成像。 还公开了发射天线和磁共振成像系统。
-
8.发明授权MRI antennas including electrically connected inner and outer conductors, and MRI systems including such antennas 有权包括电连接的内部和外部导体的MRI天线以及包括这种天线的MRI系统公开(公告)号：US06727698B1
公开(公告)日：2004-04-27
申请号：US09738233
申请日：2000-12-15
申请人： Gregory Eydelman
发明人： Gregory Eydelman
IPC分类号： G01V300
CPC分类号： G01R33/34053 , G01R33/341 , G01R33/3415 , G01R33/3678
摘要： An MRI antenna comprises an inner conductor with first and second ends and an outer conductor with first and second ends. The outer conductor substantially surrounds the inner conductor. The inner and outer conductors define a region for receiving a body part and the inner conductor is electrically connected to the outer conductor. The inner and outer conductors may be connected in a variety of manners. For example, the inner conductor may be directly electrically connected to the outer conductor. The inner conductor may also be connected electrically to the outer conductor through one or more capacitors. A magnetic resonance imaging system including the antenna of the present invention is also disclosed.
摘要翻译： MRI天线包括具有第一和第二端的内部导体和具有第一和第二端的外部导体。 外导体基本上围绕内导体。 内导体和外导体限定用于容纳主体部分的区域，并且内导体电连接到外导体。 内导体和外导体可以以各种方式连接。 例如，内部导体可以直接电连接到外部导体。 内部导体也可以通过一个或多个电容器与外部导体电连接。 还公开了包括本发明的天线的磁共振成像系统。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.018 秒)
