公开(公告)号：US5442292A

公开(公告)日：1995-08-15

申请号：US282505

申请日：1994-08-01

申请人： Heinrich Kolem ,  Wilfried Schnell ,  Rolf Sauter ,  Karsten Wicklow ,  Hermann Requardt

发明人： Heinrich Kolem ,  Wilfried Schnell ,  Rolf Sauter ,  Karsten Wicklow ,  Hermann Requardt

IPC分类号： G01R33/36 ,  G01R33/62 ,  G01V3/00

CPC分类号： G01R33/3607 ,  G01R33/62

摘要： For improving the spectral resolution and/or the signal-to-noise ratio of a nuclear magnetic resonance apparatus for examining first types of atomic nuclei that are nuclear-magnetically coupled to second types of atomic nuclei, signals are additionally emitted on the resonant frequency of the second type of atomic nucleus during the examination of the first type of atomic nucleus. To this end, the nuclear magnetic resonance apparatus includes a reception channel and only one transmission channel for both resonant frequencies. The transmission channel contains a respective synthesizer for each resonant frequency, which define the transmission frequency and contains a modulator unit shared in common by both resonant frequencies.

摘要翻译： 为了提高核磁共振装置的光谱分辨率和/或信噪比，用于检查核磁耦合到第二类原子核的第一类原子核，信号在 在第一类原子核的检查过程中的第二种原子核。 为此，核磁共振装置包括两个谐振频率的接收信道和仅一个传输信道。 传输通道包含用于每个共振频率的相应合成器，其定义传输频率并且包含由两个谐振频率共同共享的调制器单元。

公开(公告)号：US5130656A

公开(公告)日：1992-07-14

申请号：US513855

申请日：1990-04-24

申请人： Hermann Requardt ,  Norbert Krause

发明人： Hermann Requardt ,  Norbert Krause

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

CPC分类号： G01R33/341 ,  Y10S439/941

摘要： A surface coil for a nuclear magnetic resonance apparatus has a number of conductor sections arranged relative to each other. These sections can be connected to one another and to a reception unit by employing switches to enclose a preferable conductor geometry to obtain a localized image. The outer contour formed by the conductor sections is geometrically configured such that the width of the surface coil changes over its length. Thus, the coil can be positioned to conform to both an area and position which allow every segment of the localized area of interest of the examination subject to be examined with optimal signal-to-noise ratio. Further, a transmission coil which encompasses the conductor section is capable of transmitting localized radio-frequency signals, thus, eliminating the need for the use of a whole-body resonator for imaging localized areas of interest.

摘要翻译： 用于核磁共振装置的表面线圈具有相对于彼此布置的多个导体部分。 这些部分可以通过使用开关来包围优选的导体几何形状来彼此连接到接收单元以获得局部图像。 由导体部分形成的外轮廓几何形状地配置成使得表面线圈的宽度在其长度上变化。 因此，线圈可以被定位成符合允许以最佳信噪比检查检查对象的感兴趣局部区域的每个部分的区域和位置。 此外，包围导体部分的传输线圈能够发射局部射频信号，因此，不需要使用全身谐振器来成像局部感兴趣的区域。

公开(公告)号：US5097210A

公开(公告)日：1992-03-17

申请号：US522116

申请日：1990-05-11

申请人： Hermann Requardt ,  Peter Erhard

发明人： Hermann Requardt ,  Peter Erhard

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

CPC分类号： G01R33/3664 ,  G01R33/341 ,  G01R33/3628

摘要： A surface coil for a nuclear magnetic resonance apparatus has a number of conductor sections arranged relative to each other. These sections can be connected to one another to a reception unit by employing switches to enclose a preferable conductor geometry to obtain a localized image. The active coil segments form reception loops of various size and/or position. Every possible reception loop which may be created by activating various segments contains both a first variable capacitance and a second variable capacitance serving as a serial connection between the reception loop and the signal line or the signal reference line. Such an arrangement allows for activation of individual coil segments which are tuned to the resonance frequency of the nuclear magnetic resonant apparatus and which are adapted to the impedance of the input lines of the evaluation unit.

摘要翻译： 用于核磁共振装置的表面线圈具有相对于彼此布置的多个导体部分。 这些部分可以通过采用开关来包围优选的导体几何形状来彼此连接到接收单元以获得局部化的图像。 有源线圈段形成各种尺寸和/或位置的接收环路。 可以通过激活各个段来产生的每个可能的接收环路包含用作接收环路和信号线路或信号参考线路之间的串行连接的第一可变电容和第二可变电容。 这种布置允许激活被调谐到核磁共振装置的谐振频率并且适合于评估单元的输入线的阻抗的各个线圈段。

公开(公告)号：US4924868A

公开(公告)日：1990-05-15

申请号：US154314

申请日：1988-02-10

申请人： Norbert Krause ,  Hermann Requardt

发明人： Norbert Krause ,  Hermann Requardt

IPC分类号： G01R33/341 ,  G01R33/3415

CPC分类号： G01R33/341 ,  G01R33/3415

摘要： A surface coil for a nuclear magnetic resonance apparatus has a number of conductor sections arranged relative to each other. Switches are provided to connect the conductor sections in different combinations. Each combination outlines a differently sized area, or a different region, of the patient. The switches also connect the combination of conductor sections which is to be utilized to a tuning circuit. A single surface coil can thus be used to examine different regions of a patient without the coil having to be physically displaced. The different combinations of conductor sections, which connected, may form a rectangle which is adjacent to, or overlaps, a rectangle of unconnected sections.

摘要翻译： 用于核磁共振装置的表面线圈具有相对于彼此布置的多个导体部分。 提供开关用于以不同的组合连接导体部分。 每个组合概述了患者的不同大小的区域或不同的区域。 开关还将要使用的导体部分的组合连接到调谐电路。 因此，可以使用单个表面线圈来检查患者的不同区域，而不必使线圈物理位移。 连接的导体部分的不同组合可以形成与未连接部分的矩形相邻或重叠的矩形。

公开(公告)号：US4825164A

公开(公告)日：1989-04-25

申请号：US156587

申请日：1987-02-17

申请人： Hermann Requardt

发明人： Hermann Requardt

IPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/343 ,  G01R33/36 ,  G01R33/20

CPC分类号： G01R33/343 ,  G01R33/34046 ,  G01R33/341 ,  G01R33/3628

摘要： A surface resonator suitable for use in nuclear magnetic resonance equipment has two adjacently disposed windings, the respective ends of each winding being connected to each other through a series circuit including two capacitors. The respective junctions of the capacitors with each other constitute the electrical symmetry point for each winding, and are connected to ground. The signal tap for the surface resonator is galvanically taken at the ends of each winding. The surface resonator can be used for imaging and spectroscopy using nuclear magnetic resonance principles.

摘要翻译： 适用于核磁共振设备的表面谐振器具有两个相邻布置的绕组，每个绕组的相应端部通过包括两个电容器的串联电路相互连接。 电容器的各个结点彼此构成每个绕组的电对称点，并且连接到地。 用于表面谐振器的信号抽头在每个绕组的端部被电流吸取。 表面谐振器可用于使用核磁共振原理的成像和光谱。

公开(公告)号：US5221901A

公开(公告)日：1993-06-22

申请号：US763639

申请日：1991-09-23

申请人： Guenther Decke ,  Hermann Requardt

发明人： Guenther Decke ,  Hermann Requardt

IPC分类号： G01R33/341 ,  G01R33/36

CPC分类号： G01R33/341 ,  G01R33/3628

摘要： A double surface coil for a nuclear magnetic resonance apparatus as two individual coils, each individual coils being formed by two sub-coils connected in parallel. A series circuit of a capacitor and an inductor is connected in each sub-coil, with a series circuit of a capacitor and a controllable switch being connected in parallel with each inductor. By appropriate drive of switches, both individual coils, one individual coil by itself, or both individual coils in alternating operation can be activated.

摘要翻译： 用于核磁共振装置的双面线圈作为两个单独的线圈，每个单独的线圈由并联连接的两个子线圈形成。 电容器和电感器的串联电路连接在每个子线圈中，电容器和可控开关的串联电路与每个电感器并联连接。 通过适当的开关驱动，可以激活两个单独的线圈，单独的单个线圈或交替操作的两个单独的线圈。

公开(公告)号：US5202634A

公开(公告)日：1993-04-13

申请号：US763641

申请日：1991-09-23

申请人： Andreas Potthast ,  Guenther Decke ,  Hermann Requardt

发明人： Andreas Potthast ,  Guenther Decke ,  Hermann Requardt

IPC分类号： G01R33/341 ,  G01R33/36

CPC分类号： G01R33/3628 ,  G01R33/341

摘要： A double surface coil for a nuclear magnetic resonance apparatus has two individual coils which are connectable to a transmission/reception circuit via a matching network. The coils are connected together at a junction. Each coil has a controllable switch connected between the junction and the matching circuit. The individual surface coils can thus be controlled with a low number of controlled elements in any desired operating mode.

摘要翻译： 用于核磁共振装置的双面线圈具有两个单独的线圈，其可通过匹配网络连接到发射/接收电路。 线圈在连接处连接在一起。 每个线圈都有一个连接在结点和匹配电路之间的可控开关。 因此，可以以任何期望的操作模式中的少数受控元件来控制各个表面线圈。