公开(公告)号：US4841249A

公开(公告)日：1989-06-20

申请号：US105003

申请日：1987-10-06

申请人： Wilhelm Duerr ,  Hartwig Ingwersen ,  Norbert Krause ,  Ralph Oppelt

发明人： Wilhelm Duerr ,  Hartwig Ingwersen ,  Norbert Krause ,  Ralph Oppelt

IPC分类号： G01R33/32 ,  A61B5/055 ,  G01R33/341 ,  G01R33/343

CPC分类号： G01R33/341 ,  G01R33/343

摘要： A surface resonator for use in nuclear magnetic resonance tomography is a single turn loop of ribbon-like electrical conductor having spaced ends facing each other which form a capacitor whose capacitance determines the resonant frequency. The loop of ribbon-like conductor is shaped to conform substantially to the generated surface of a truncated cone. The ends of the loop may be in the form of spaced plates for providing the necessary capacitance, or may be connected by one or more discrete component capacitors.

摘要翻译： 用于核磁共振断层摄影的表面谐振器是带状电导体的单回路，其具有彼此面对的间隔开的端部，其形成电容器，其确定谐振频率。 带状导体的环形被成形为基本上符合产生的截头圆锥形表面。 环的端部可以是间隔开的板的形式，用于提供必要的电容，或者可以由一个或多个分立元件电容器连接。

公开(公告)号：US5602557A

公开(公告)日：1997-02-11

申请号：US534882

申请日：1995-09-27

申请人： Wilhelm Duerr

发明人： Wilhelm Duerr

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/08

CPC分类号： G01R33/34046 ,  G01R33/34084 ,  G01R33/3415 ,  G01R33/3628

摘要： A mammography antenna arrangement for magnetic resonance examinations of the female breast has first and second conductor loop pairs, each of which is formed by two saddle-shaped conductor loops lying opposite one another and between which an essentially cylindrical examination space, having a receptacle opening, is located. The two conductor loop pairs are rotationally offset by 90.degree. relative to one another in the circumferential direction. A capacitive element is connected in a part of each conductor loop that faces away from the receptacle opening.

摘要翻译： 用于雌性乳房的磁共振检查的乳房X射线摄影天线装置具有第一和第二导体环对，每个导体环对由两个彼此相对的鞍形导体环形成，并且具有插座开口的基本上圆柱形的检查空间， 位于。 两个导体环对在圆周方向上相对于彼此旋转偏移90度。 电容元件连接在背离插座开口的每个导体环的一部分中。

公开(公告)号：US5467017A

公开(公告)日：1995-11-14

申请号：US129314

申请日：1993-09-30

申请人： Wilhelm Duerr ,  Norihiko Mikoshiba ,  Yutaka Watanabe

发明人： Wilhelm Duerr ,  Norihiko Mikoshiba ,  Yutaka Watanabe

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/36 ,  G01R33/28

CPC分类号： G01R33/341 ,  G01R33/34061 ,  G01R33/3628

摘要： An antenna arrangement for a nuclear magnetic resonance apparatus, the apparatus having a magnet which generates a basic magnetic field between two pole plates, includes a sub-antenna disposed at each pole plate, each sub-antenna being composed of a closed, grounded shielding facing toward the pole plate and a planar conductor structure disposed a distance from the shielding and substantially parallel thereto, into which a high-frequency current is fed.

摘要翻译： 一种用于核磁共振装置的天线装置，具有在两极板之间产生基本磁场的磁体的装置包括设置在每个极板处的子天线，每个子天线由封闭的接地屏蔽面 朝向极板和平面导体结构，该平面导体结构与屏蔽物基本平行设置，并与其高频电流馈送到其中。

公开(公告)号：US5294886A

公开(公告)日：1994-03-15

申请号：US872100

申请日：1992-04-22

申请人： Wilhelm Duerr

发明人： Wilhelm Duerr

IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/341 ,  G01R33/36 ,  G01R33/00

CPC分类号： G01R33/3685 ,  G01R33/3657

摘要： In a magnetic resonance imaging tomography apparatus having a transmission antenna for exciting nuclear spins in an examination subject, and a reception antenna in the form of a local coil, the feeder for the local coil is provided with decoupling elements. The decoupling elements prevent a coupling of the electrical field of the transmission antenna with the feeder for the local coil.

摘要翻译： 在具有用于激励检查对象中的核自旋的发送天线的磁共振成像断层摄影装置和局部线圈形式的接收天线中，局部线圈的馈线设置有去耦元件。 去耦元件防止发射天线的电场与本地线圈的馈线的耦合。

公开(公告)号：US5144241A

公开(公告)日：1992-09-01

申请号：US567739

申请日：1990-08-15

申请人： Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

发明人： Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

IPC分类号： G01R33/32 ,  A61B5/055 ,  G01R33/34 ,  G01R33/343

CPC分类号： G01R33/343

摘要： A circularly polarizing RF antenna suitable for use in an MRI apparatus for obtaining tomograms of an examination subject includes two antenna systems, each having a winding, having two lateral legs and a middle leg, and a return path which form a resonant circuit in combination with one or more resonant capacitors. The middle legs of the two antenna systems are disposed so that they cross one another. One or more decoupling capacitors are provided between the two antenna systems. A circularly polarizing antenna for a magnetic resonance imaging system is thus obtained having a magnetic field vector in the imaging region which rotates in planes parallel to the pole surfaces of a C-shaped magnet which generates the fundamental magnetic field in the magnetic resonance imaging apparatus.

摘要翻译： 适用于MRI装置中用于获取检查对象的断层图像的圆偏振RF天线包括两个天线系统，每个天线系统具有绕组，具有两个横向腿和中间支腿，以及一个形成谐振电路的返回路径，与 一个或多个谐振电容器。 两个天线系统的中间腿被布置成使得它们彼此交叉。 在两个天线系统之间提供一个或多个去耦电容器。 因此，获得了一种用于磁共振成像系统的圆极化天线，其在成像区域中具有磁场矢量，该磁场矢量在平行于在磁共振成像装置中产生基本磁场的C形磁体的极面平行的平面中旋转。

公开(公告)号：US5699802A

公开(公告)日：1997-12-23

申请号：US536950

申请日：1995-09-29

申请人： Wilhelm Duerr

发明人： Wilhelm Duerr

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/341

CPC分类号： G01R33/422 ,  A61B5/055 ,  A61B5/415 ,  G01R33/34046 ,  G01R33/3678

摘要： In a mammography antenna arrangement for magnetic resonance examinations of a female breast, a conductor arrangement forms a closed circuit and surrounds a receptacle opening for the female breast. The receptacle opening lies in a surface that is essentially horizontally directed. Two arcuate conductor segments have their ends connected to the conductor arrangement via electrical connecting locations and surround an examination space that is fashioned for the acceptance of the female breast. The two conductor segments are respectively arranged in vertical, planes, the two planes being perpendicular to one another.

摘要翻译： 在用于女性乳房的磁共振检查的乳房照相天线装置中，导体装置形成闭合电路并围绕女性乳房的插座开口。 容器开口位于基本上水平定向的表面中。 两个弓形导体段的端部通过电气连接位置连接到导体装置，并且围绕着用于接受女性乳房的检查空间。 两个导体段分别布置在垂直的平面中，两个平面彼此垂直。

公开(公告)号：US5574372A

公开(公告)日：1996-11-12

申请号：US374028

申请日：1995-01-18

申请人： Michael Moritz ,  Ralph Oppelt ,  Wilhelm Duerr

发明人： Michael Moritz ,  Ralph Oppelt ,  Wilhelm Duerr

IPC分类号： A61B5/055 ,  G01R33/422 ,  G01R33/28

CPC分类号： A61B5/055 ,  G01R33/422

摘要： In a diagnostic magnetic resonance apparatus having an examination space, a radio-frequency antenna and a gradient coil system, the radio-frequency antenna is arranged closer to the examination space than is the gradient coil system. A radio-frequency shield arranged between the radio-frequency antenna and the gradient coil system, and has a first electrically conductive layer arrangement and a second electrically conductive layer arrangement arranged lying opposite the first arrangement, these being separated from one another by a dielectric. The layer arrangements have interconnects arranged side-by-side that are separated from one another by electrically insulating slots. The slots of the first layer arrangement are arranged offset relative to the slots in the second layer arrangement. Neighboring interconnects in at least one layer arrangement are connected to one another via bridges that conduct high-frequency currents, the bridges being arranged such that currents induced in the layer arrangement by the radio-frequency antenna can essentially flow only between the neighboring interconnects via the bridges.

摘要翻译： 在具有检查空间的诊断用磁共振装置，射频天线和梯度线圈系统中，与梯度线圈系统相比，射频天线配置得比检查空间更近。 布置在射频天线和梯度线圈系统之间的射频屏蔽，并且具有布置成与第一布置相对的第一导电层布置和第二导电层布置，它们通过电介质彼此分离。 层布置具有并排布置的互连，其通过电绝缘槽相互分离。 第一层布置的槽相对于第二层布置中的槽布置成偏置。 至少一层结构中的相邻互连通过传导高频电流的桥连接，桥被布置成使得由射频天线在层布置中感应的电流本质上只能在相邻互连之间经由 桥梁

公开(公告)号：US5332990A

公开(公告)日：1994-07-26

申请号：US80820

申请日：1993-06-24

申请人： Wilhelm Duerr ,  Gerhard Temmel

发明人： Wilhelm Duerr ,  Gerhard Temmel

IPC分类号： G01R33/34 ,  H01H85/046 ,  H01H85/08 ,  H01H85/04

CPC分类号： G01R33/288 ,  G01R33/34 ,  H01H85/046 ,  H01H85/08

摘要： A high-frequency safety fuse has a fusible conductor having a cross-sectional area capable of carrying a high-frequency current, and two electrical terminals respectively connected to opposite ends of the fusible conductor. The cross-sectional area has a dimension in at least one direction which is approximately twice the penetration depth of the high-frequency current in the conductor. A fuse is thereby obtained having a low high-frequency equivalent resistance but also having a low cut-off current.

摘要翻译： 高频安全保险丝具有能够承载高频电流的横截面积的熔断导体，以及分别连接到可熔导体的相对端的两个电端子。 横截面积在至少一个方向上具有大约是导体中高频电流的穿透深度的两倍的尺寸。 由此获得具有低的高频等效电阻而且具有低截止电流的熔丝。

公开(公告)号：US5258718A

公开(公告)日：1993-11-02

申请号：US790506

申请日：1991-11-12

申请人： Wilhelm Duerr

发明人： Wilhelm Duerr

IPC分类号： A61B5/055 ,  G01R33/36 ,  H03H11/04 ,  G01R33/20

CPC分类号： G01R33/3664 ,  G01R33/288

摘要： In a nuclear magnetic resonance tomography apparatus, having a high-frequency excitation and measuring coil connected with a capacitor to form a resonant circuit, the capacitor being tuned to a desired operating frequency, a circuit is provided for limiting the voltage of the resonant capacitor in a transmission mode. Avoidance of impermissible peak amplitudes is thereby achieved without the necessity of over-dimensioning the components of the resonant circuit.

摘要翻译： 在具有与电容器连接以形成谐振电路的高频激励和测量线圈的核磁共振断层摄影装置中，电容器被调谐到期望的工作频率，提供电路用于限制谐振电容器的电压 传输模式。 由此，避免了不允许的峰值振幅，而不需要对谐振电路的部件进行过大尺寸化。

公开(公告)号：US5153517A

公开(公告)日：1992-10-06

申请号：US626442

申请日：1990-12-12

申请人： Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

发明人： Ralph Oppelt ,  Wilhelm Duerr ,  Horst Siebold

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/341

CPC分类号： G01R33/3678 ,  G01R33/341

摘要： A surface resonator for use in a magnetic resonance imaging apparatus having a transversal fundamental magnetic field is composed of two sub-systems, each generating a magnetic field with the magnetic fields being perpendicular relative to each other. Each sub-system contains two current loops, both of which enclose the magnetic field allocated to them in the same plane. A circularly polarizing surface resonator is thus obtained for the transversal fundamental magnetic field.

摘要翻译： 用于具有横向基本磁场的磁共振成像装置的表面谐振器由两个子系统组成，每个子系统产生磁场，磁场相对于彼此垂直。 每个子系统包含两个电流回路，两个电流环都包含在同一平面上分配给它们的磁场。 因此获得了用于横向基本磁场的圆偏振面谐振器。