公开(公告)号：US20090091394A1

公开(公告)日：2009-04-09

申请号：US12247377

申请日：2008-10-08

申请人： Axel Friedrich

发明人： Axel Friedrich

IPC分类号： H03C1/02

CPC分类号： G01R33/3607

摘要： A device for generation a modulated electrical radio-frequency signal for a magnetic resonance application has a phase modulator that generates a phase-modulated radio-frequency base signal, an amplitude modulator that generates an amplitude-modulated supply voltage, and a non-linear transmission output stage that, to supply the radio-frequency base signal, is connected via a signal input with the phase modulator and, to feed in the supply voltage, is connected via a supply voltage input with the amplitude modulator. The amplitude modulator includes at least two switching power supplies connected in parallel and clocked phase-offset relative to one another.

摘要翻译： 用于产生用于磁共振应用的调制电射频信号的装置具有产生相位调制的射频基频信号的相位调制器，产生调幅电源电压的振幅调制器和非线性传输 输出级，其通过与相位调制器的信号输入相连，提供射频基准信号，并通过与幅度调制器输入的电源电压连接供电电压。 幅度调制器包括并联连接的至少两个开关电源和相对于彼此的时钟相位偏移。

公开(公告)号：US06469509B2

公开(公告)日：2002-10-22

申请号：US09981557

申请日：2001-10-16

申请人： Axel Friedrich ,  Helmut Greim

发明人： Axel Friedrich ,  Helmut Greim

IPC分类号： G01V300

CPC分类号： G01R33/341 ,  G01R33/288 ,  G01R33/3657

摘要： An inherently decoupled MR reception coil arrangement for a magnetic resonance imaging tomography system has a number of selectively pluggable local coils, in which the local coils provided with active detuning also have a passive detuning circuit for the transmission phase, and at least one of the local coils has a passive detuning circuit for the reception phase in the unplugged state.

摘要翻译： 用于磁共振成像断层摄影系统的固有解耦的MR接收线圈装置具有多个可选择地可插拔的局部线圈，其中设置有主动失谐的本地线圈也具有用于传输阶段的被动失谐电路，以及至少一个本地线圈 线圈具有用于处于未插拔状态的接收阶段的被动失谐电路。

公开(公告)号：US5708361A

公开(公告)日：1998-01-13

申请号：US721119

申请日：1996-09-26

申请人： Jianmin Wang ,  Axel Friedrich

发明人： Jianmin Wang ,  Axel Friedrich

IPC分类号： G01R33/32 ,  A61B5/055 ,  G01R33/34 ,  G01R33/36 ,  G01V3/00

CPC分类号： G01R33/365 ,  G01R33/3415

摘要： An antenna arrangement for a magnetic resonance apparatus has at least two adjacent individual antennas. Each individual antenna has at least one conductor loop. For mutual decoupling, the conductor loops of the adjacent individual antennas each have an interruption. The interruptions are electrically connected in parallel and are jumpered with at least one capacitive element, the capacitive element having a capacitance value at which the individual antennas are decoupled from one another.

摘要翻译： 用于磁共振装置的天线装置具有至少两个相邻的独立天线。 每个单独的天线具有至少一个导体环路。 为了相互解耦，相邻单独天线的导体环路各有一个中断。 这些中断是并联电连接的，并与至少一个电容元件进行跳线，电容元件具有电容值，各个天线彼此分离。