公开(公告)号：US20070085634A1

公开(公告)日：2007-04-19

申请号：US11540622

申请日：2006-09-29

申请人： Jian-Jun Du ,  Arne Reykowski ,  Markus Vester ,  Jian Wang

发明人： Jian-Jun Du ,  Arne Reykowski ,  Markus Vester ,  Jian Wang

IPC分类号： H01P7/00

CPC分类号： G01R33/3415 ,  G01R33/365

摘要： A coil arrangement for a magnetic resonance apparatus has a number of coil elements that are capable of being operated independently of one another and are situated around a common central area. Each coil element of the coil arrangement is capacitively or inductively decoupled from the coil elements of the coil arrangement that are immediately adjacent to this coil element. In the central area, there is situated a capacitor network that connects the coil elements of the coil arrangement to one another. The capacitor network is fashioned and dimensioned such that it at least reduces the coupling of each coil element of the coil arrangement to at least one additional coil element of the coil arrangement that is not immediately adjacent to the respective coil element.

摘要翻译： 用于磁共振装置的线圈装置具有能够彼此独立地操作并且位于公共中心区域周围的多个线圈元件。 线圈装置的每个线圈元件与线圈装置的线圈元件电容性地或电感地解耦，该线圈元件紧邻该线圈元件。 在中央区域中，设置有将线圈装置的线圈元件彼此连接的电容器网络。 电容器网络的形状和尺寸使得其至少将线圈装置的每个线圈元件的耦合减小到线圈装置的至少一个附加线圈元件，其不直接邻近相应的线圈元件。

公开(公告)号：US20060038566A1

公开(公告)日：2006-02-23

申请号：US11208185

申请日：2005-08-18

申请人： Ralph Kimmlingen ,  Razvan Lazar ,  Jurgen Nistler ,  Wolfgang Renz ,  Markus Vester

发明人： Ralph Kimmlingen ,  Razvan Lazar ,  Jurgen Nistler ,  Wolfgang Renz ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/385 ,  G01R33/422

摘要： A magnetic resonance apparatus has an RF antenna unit, a gradient coil unit and an RF shield, the conductor structures of which are independent of one another. The RF shield is arranged between the RF antenna unit and the gradient coil unit, a first RF field return volume is arranged between RF the antenna unit (1, 29, 55A, and the gradient coil unit, the RF field return volume closes RF magnetic field lines of the RF antenna unit and is bordered by the RF shield on the side of the gradient coil unit. The conductor structure of the gradient coil unit occupies a first region. A second conductor-free region is within the first region, on the side facing the RF antenna unit, between a primary gradient coil unit and a secondary shim gradient coil unit of the gradient coil unit. The second conductor-free region is at least partially surrounded by the conductor structure of the gradient coil unit and is fashioned as a second RF field return volume in connection with the first RF field return volume. The RF shield proceeds between the RF field return volumes and the conductor structure of the gradient coil unit. The RF antenna unit is closer to the data acquisition region of the magnetic resonance apparatus than the gradient coil unit.

摘要翻译： 磁共振装置具有RF天线单元，梯度线圈单元和RF屏蔽，其导体结构彼此独立。 RF屏蔽设置在RF天线单元和梯度线圈单元之间，RF天线单元（1,29,55A和梯度线圈单元之间）之间布置第一RF场返回音量，RF场返回音量关闭RF RF天线单元的磁场线，并且由梯形线圈单元侧的RF屏蔽界定，梯度线圈单元的导体结构占据第一区域，第二无导体区域在第一区域内，在 面向RF天线单元的一侧，梯度线圈单元的主梯度线圈单元和次级斜面梯形线圈单元之间，第二无导体区域至少部分地被梯度线圈单元的导体结构包围，并被形成 作为与第一RF场返回体积相关的第二RF场返回体积，RF屏蔽在RF场返回体积和梯度线圈单元的导体结构之间进行，RF天线单元更靠近 e数据采集区域比梯形线圈单元。

公开(公告)号：US06930482B2

公开(公告)日：2005-08-16

申请号：US10808959

申请日：2004-03-25

申请人： Oliver Heid ,  Markus Vester

发明人： Oliver Heid ,  Markus Vester

IPC分类号： G01R33/34 ,  G01R33/422 ,  G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/422

摘要： A time-variable magnetic fields generator for a magnetic resonance apparatus has at least one gradient coil with conductors extending essentially in the region of a subject-receiving hollow opening of the magnetic resonance apparatus, and that is free of conductors in a middle axial region of the hollow opening, a first radio-frequency shield that encloses the conductors disposed on the one side of the middle region, a second radio-frequency shield that encloses the conductors disposed on the other side of the middle region, a radio-frequency antenna element that emits a radio-frequency field, disposed between the first and second radio-frequency shield in the middle region, a third radio-frequency shield proceeding radially, externally around the antenna element, such that the radio-frequency shields delimit a field return space within the generator and that is designed for a return of the radio-frequency field.

摘要翻译： 用于磁共振装置的时变磁场发生器具有至少一个梯形线圈，其具有基本上在磁共振装置的受试者接收中空开口的区域中延伸的导体，并且在中间轴向区域中没有导体 所述中空开口，包围设置在所述中间区域的一侧的所述导体的第一射频屏蔽体，包围设置在所述中间区域的另一侧的导体的第二射频屏蔽体，射频天线元件 其发射设置在中间区域中的第一和第二射频屏蔽之间的射频场，在天线元件周围径向地径向地进行的第三射频屏蔽，使得射频屏蔽限定场返回空间 并且被设计用于射频场的返回。

公开(公告)号：US20050162167A1

公开(公告)日：2005-07-28

申请号：US11039594

申请日：2005-01-20

申请人： Oliver Heid ,  Markus Vester

发明人： Oliver Heid ,  Markus Vester

IPC分类号： G01R33/34 ,  G01R33/38 ,  G01R33/421 ,  G01R33/422 ,  G01V3/00

CPC分类号： G01R33/3806 ,  G01R33/34046 ,  G01R33/385 ,  G01R33/4215 ,  G01R33/422

摘要： A generator (13A, . . . 13C) of a time-variable magnetic field (B1) of a magnetic resonance device (1) which has an examination space (9,9A) for accommodating at least one area to be examined of an examination subject (7), in which examination area the time-variable magnetic field (B1) is generated by means of a current through a conductor (15, 19, 31). The magnetic field lines (23) of the magnetic field (B1) close with the aid of a field flux return space (17), in which there is arranged at least one sub-assembly (27) which has magnetizable material. A reduction of a magnetic energy density in the field flux return space (17) is produced by this means. This increases e.g. the efficiency i n the generation of high-frequency magnetic fields (B1) or of gradient fields with the aid of the conductor (15,19,31).

摘要翻译： 一种具有用于容纳至少一个区域的检查空间（9,9A）的磁共振装置（1）的时变磁场（B 1）的发生器（13A，... 13C） 检查检查对象（7），其中检查区域通过通过导体（15,19,31）的电流产生时变磁场（B 1）。 磁场（B 1）的磁场线（23）借助于场磁通返回空间（17）而闭合，其中布置有至少一个具有可磁化材料的子组件（27）。 通过这种方式产生场磁通返回空间（17）中的磁能密度的降低。 这增加例如 借助于导体（15,19,31）产生高频磁场（B 1）或梯度场的效率。

公开(公告)号：US20050030031A1

公开(公告)日：2005-02-10

申请号：US10910893

申请日：2004-08-04

申请人： Jurgen Nistler ,  Stefan Stocker ,  Markus Vester

发明人： Jurgen Nistler ,  Stefan Stocker ,  Markus Vester

IPC分类号： G01R33/385 ,  G01R33/422 ,  G01V3/00

CPC分类号： G01R33/422 ,  G01R33/3854

摘要： A magnetic resonance apparatus with a hollow interior and with a gradient coil system disposed in the hollow interior, wherein the hollow interior exhibits a barrel-like bulge, the gradient coil system is essentially enclosed by a radio-frequency shield, and he radio-frequency shield is fashioned free of a slotting in regions in which it, with regard to a boundary of the hollow interior is at a shorter distance compared with a middle region of the bulge.

摘要翻译： 具有中空内部并具有设置在中空内部的梯度线圈系统的磁共振装置，其中中空内表面呈筒状凸起，该梯度线圈系统基本上被射频屏蔽封闭，并且其射频 在与凸起的中间区域相比，中空内部的边界处于较短距离的区域中，护罩被制成没有开槽。

公开(公告)号：US06842003B2

公开(公告)日：2005-01-11

申请号：US10394925

申请日：2003-03-21

申请人： Oliver Heid ,  Markus Vester

发明人： Oliver Heid ,  Markus Vester

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

CPC分类号： G01R33/34046

摘要： A radio-frequency antenna has two end rings and a number of antenna rods that form a birdcage resonator. A coupling element couples high-frequency electromagnetic energy into the resonator in the transmission mode and out therefrom in the reception mode. The coupling element is fashioned as a conductor system tangentially surrounding the resonator and into which a high-frequency systems of currents can be fed in the transmission mode or from which a high-frequency system of currents can be fed out in the reception case. The coupling element is coupled only inductively to the resonator.

摘要翻译： 射频天线具有两个端环和多个形成鸟笼谐振器的天线杆。 耦合元件在传输模式下将高频电磁能耦合到谐振器中，并在接收模式下耦合。 耦合元件被形成为切向围绕谐振器的导体系统，并且可以在传输模式中馈送高频系统的电流，或者可以在接收情况下从其中馈送高频电流系统。 耦合元件仅感应耦合到谐振器。

公开(公告)号：US06822445B2

公开(公告)日：2004-11-23

申请号：US10256034

申请日：2002-09-26

申请人： Markus Vester

发明人： Markus Vester

IPC分类号： G01V300

CPC分类号： G01R33/3621 ,  G01R33/3692

摘要： A magnetic resonance signal is compressed, so that high signal values are over-proportionally reduced, and is then supplied to an analog-to-digital converter wherein it is digitized. After transmission to reception device, the magnetic resonance signal is expanded, so that high signal values are over-proportionally amplified.

摘要翻译： 磁共振信号被压缩，使得高信号值被过比例地减小，然后被提供给其数字化的模数转换器。 在发送到接收装置之后，磁共振信号被扩展，使得高信号值被过度放大。

公开(公告)号：US06791322B2

公开(公告)日：2004-09-14

申请号：US10262328

申请日：2002-10-01

申请人： Markus Vester

发明人： Markus Vester

IPC分类号： G01V300

CPC分类号： H04B5/02 ,  G01R33/3692 ,  H04B7/0802

摘要： In a reception coil, a carrier signal is frequency-modulated around a carrier frequency with a modulation signal corresponding to an analog magnetic resonance signal. The frequency-modulated carrier signal is wirelessly transmitted from the reception coil to a reception circuit that is spatially separated from the reception coil. The frequency-modulated carrier signal is demodulated in the reception circuit in order to reacquire the modulation signal.

摘要翻译： 在接收线圈中，通过对应于模拟磁共振信号的调制信号，以载波频率对载波信号进行频率调制。 频率调制载波信号从接收线圈无线发送到与接收线圈在空间上分离的接收电路。 调频载波信号在接收电路中进行解调，以重新获取调制信号。

公开(公告)号：US06590395B2

公开(公告)日：2003-07-08

申请号：US10180416

申请日：2002-06-26

申请人： Arne Reykowski ,  Markus Vester

发明人： Arne Reykowski ,  Markus Vester

IPC分类号： G01V300

CPC分类号： G01R33/341 ,  Y10S439/95

摘要： A connector device for a sensor or actuator is composed of two terminal elements releasably connected to one another. A first of these terminal elements including a first electrical conductor that is connected to the sensor or actuator and a second of these terminal elements including a second electrical conductor that is connectible to an evaluation unit. The two electrical conductors are fashioned as coil systems in the terminal elements that enable signal transmission by inductive coupling given a connection of the two terminal elements. Each of the coil systems is formed of at least two series-connected coils that have oppositely directed windings and that are dimensioned such that the sum of voltages induced in the coils by a uniform electromagnetic field yields zero for each of the coil systems. The present connector device can be advantageously utilized for the connection of surface coils to the system of a magnetic resonance system and enables a complete hermetic sealing of the surface coils.

摘要翻译： 用于传感器或致动器的连接器装置由可释放地彼此连接的两个端子元件组成。 这些端子元件中的第一个包括连接到传感器或致动器的第一电导体，以及包括可连接到评估单元的第二电导体的这些端子元件中的第二个。 两个电导体被形成为端子元件中的线圈系统，通过给定两个端子元件的连接使得能够通过感应耦合进行信号传输。 每个线圈系统由至少两个串联连接的线圈形成，该线圈具有相对定向的绕组，其尺寸使得通过均匀电磁场在线圈中感应的电压之和为每个线圈系统产生零。 本连接器装置可以有利地用于将表面线圈连接到磁共振系统的系统，并且能够实现表面线圈的完全密封。

公开(公告)号：US06281755B1

公开(公告)日：2001-08-28

申请号：US09221049

申请日：1998-12-28

申请人： Peter Feld ,  Horst Kroeckel ,  Markus Vester

发明人： Peter Feld ,  Horst Kroeckel ,  Markus Vester

IPC分类号： H03F3191

CPC分类号： H03F1/565 ,  H03F3/191 ,  H03F2200/111

摘要： A high-frequency power amplifier for feeding an antenna of a nuclear magnetic resonance tomography apparatus has at least one amplifier stage that can emit a maximum output power within a first frequency band. Circuitry for frequency-dependently altering the maximum output power is connected to the amplifier stage, whereby the maximum output power within a second frequency band, that is higher than the first frequency band is higher than within the first frequency band.

摘要翻译： 用于馈送核磁共振断层摄影装置的天线的高频功率放大器具有至少一个可在第一频带内发射最大输出功率的放大器级。 用于频率依赖性地改变最大输出功率的电路连接到放大器级，由此在比第一频带高的第二频带内的最大输出功率高于第一频带内的最大输出功率。