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41. 发明授权

US07218113B2 Magnetic resonance system and operating method for RF pulse optimization 有权
标题翻译：用于RF脉冲优化的磁共振系统和操作方法
公开(公告)号：US07218113B2
公开(公告)日：2007-05-15
申请号：US11036727
申请日：2005-01-14
申请人： Thorsten Feiweier , Ralf Ladebeck , Ralph Oppelt , Wolfgang Renz , Markus Vester
发明人： Thorsten Feiweier , Ralf Ladebeck , Ralph Oppelt , Wolfgang Renz , Markus Vester
IPC分类号： G01V3/00
CPC分类号： G01R33/5612 , G01R33/246 , G01R33/543 , G01R33/5659
摘要： In a magnetic resonance system and an operating method therefor, a B1 field distribution of a radio-frequency antenna is measured in at least one part of a examination volume of the magnetic resonance system, and then the RF pulses emitted by the radio-frequency antenna are optimized, based on the determined B1 field distribution, for homogenization in a specific volume. An effective volume within the examination volume is determined beforehand for each applied RF pulse and, based on the determined B1 field distribution, the appertaining RF pulse is individually adjusted such that the B1 field is homogenized within the effective volume of the RF pulse.
摘要翻译：在磁共振系统及其操作方法中，在磁共振系统的检查体积的至少一部分中测量射频天线的B 1场分布，然后RF 基于确定的B SUB场分布来优化由射频天线发射的脉冲用于在特定体积中的均匀化。对于每个施加的RF脉冲，预先确定检查体积内的有效体积，并且基于所确定的B SUB场分布，分别调整相应的RF脉冲，使得B <1> SUB>场在RF脉冲的有效体积内均匀化。

42. 发明申请

US20060250133A1 Combined positron emission tomography and magnetic resonance tomography unit 失效
标题翻译：组合正电子发射断层扫描和磁共振断层扫描单元
公开(公告)号：US20060250133A1
公开(公告)日：2006-11-09
申请号：US11395251
申请日：2006-04-03
申请人： Robert Krieg , Rainer Kuth , Ralf Ladebeck , Ralph Oppelt , Wolfgang Renz , Sebastian Schmidt , Markus Vester
发明人： Robert Krieg , Rainer Kuth , Ralf Ladebeck , Ralph Oppelt , Wolfgang Renz , Sebastian Schmidt , Markus Vester
IPC分类号： G06K9/00
CPC分类号： G01R33/481 , G01T1/1603
摘要： A positron emission tomography unit (PET), having a unit part assigned to an examination space and a first evaluation unit, is combined with a magnetic resonance tomography unit (MRT). The unit part of the PRT includes at least two gamma ray detector units with in each case an assigned electronics unit. The MRT includes a second evaluation unit, a gradient coil system and a high frequency antenna device formed as a stripline antenna device having at least two conductors. The high frequency antenna device is arranged nearer to the examination space than the gradient coil system with a high frequency shield between the gradient coil system and the high frequency antenna device. Each conductor of the stripline antenna device respectively includes a gamma ray detector unit with an assigned electronics unit. The conductors of the stripline antenna device are configured for the respective gamma ray detector units and their assigned electronics units as shielding covers that are caused by the high frequency antenna device and are opaque to high frequency radiation. An examination object in the examination space can be imaged by the combined positron emission tomography and magnetic resonance tomography unit.
摘要翻译：将具有分配给检查空间的单位部分和第一评估单元的正电子发射断层摄影单元（PET）与磁共振断层摄影单元（MRT）组合。 PRT的单位部分包括至少两个伽马射线检测器单元，在每种情况下都是分配的电子单元。 MRT包括第二评估单元，梯度线圈系统和形成为具有至少两个导体的带状线天线装置的高频天线装置。高频天线装置布置成比梯度线圈系统和高频天线装置之间具有高频屏蔽的梯度线圈系统更靠近检查空间。带状线天线装置的每个导体分别包括具有分配的电子单元的伽马射线检测器单元。带状线天线装置的导体被配置用于相应的伽马射线检测器单元及其分配的电子单元作为由高频天线装置引起并且对高频辐射不透明的屏蔽盖。检查空间中的检查对象可以通过组合的正电子发射断层摄影和磁共振断层摄影单元成像。

43. 发明申请

US20050270031A1 Antenna Amplifier, in particular for a magnetic resonance antenna 有权
标题翻译：天线放大器，特别是用于磁共振天线
公开(公告)号：US20050270031A1
公开(公告)日：2005-12-08
申请号：US11139069
申请日：2005-05-27
申请人： Ralph Oppelt , Markus Vester
发明人： Ralph Oppelt , Markus Vester
IPC分类号： G01R33/36 , G01V3/00
CPC分类号： G01R33/3614
摘要： An antenna amplifier, in particular for a magnetic resonance antenna, has a sheath wave barrier integrated into the signal path of the antenna amplifier in the form of a component designed exclusively for transfer of a differential signal.
摘要翻译：天线放大器，特别是用于磁共振天线的天线放大器具有集成到天线放大器的信号路径中的鞘波屏障，其以专门用于传送差分信号的部件的形式。

44. 发明申请

US20050140369A1 RF transmitter arrangement for an MR system, and method for determining a setting parameter therefor 有权
标题翻译：用于MR系统的RF发射机布置，以及用于确定其设置参数的方法
公开(公告)号：US20050140369A1
公开(公告)日：2005-06-30
申请号：US10993644
申请日：2004-11-19
申请人： Thorsten Feiweier , Ralph Oppelt , Wolfgang Renz , Markus Vester
发明人： Thorsten Feiweier , Ralph Oppelt , Wolfgang Renz , Markus Vester
IPC分类号： G01R33/34 , G01R33/36 , G01V3/00
CPC分类号： G01R33/5659 , G01R33/246 , G01R33/34046 , G01R33/34061 , G01R33/3415 , G01R33/3607 , G01R33/5612
摘要： A radio frequency transmitter arrangement for a magnetic resonance apparatus has a distribution unit and an antenna unit, wherein the antenna unit, to generate radio frequency fields, is fashioned in at least two orthogonal modes, and the distribution unit is fashioned for the division of an RF transmission signal into at least two mode feed signals. At least one adjustment unit is provided to adjust the amplitude and/or phase of one of the mode feed signals and is connected with the antenna unit such that each of the mode feed signals generates a radio frequency field in one of the modes. A multiple transmitter arrangement has at least two radio frequency transmitter arrangements and at least two 180° hybrids. A method is provided to determine at least one setting parameter of the adjustment unit.
摘要翻译：用于磁共振装置的射频发射器装置具有分配单元和天线单元，其中生成射频场的天线单元以至少两个正交模式形成，并且分配单元被形成用于划分 RF传输信号转换成至少两个模式馈送信号。提供至少一个调整单元以调整模式馈送信号之一的幅度和/或相位，并且与天线单元连接，使得每个模式馈送信号在其中一种模式中产生射频场。多发射机布置具有至少两个射频发射机布置和至少两个180°混合。提供了一种确定调节单元的至少一个设定参数的方法。

45. 发明授权

US4945321A .pi./2 power divider 失效
标题翻译： pi / 2功率分配器
公开(公告)号：US4945321A
公开(公告)日：1990-07-31
申请号：US333287
申请日：1989-04-05
申请人： Ralph Oppelt , Markus Vester
发明人： Ralph Oppelt , Markus Vester
IPC分类号： H01P5/16 , H03H7/21 , H03H7/48
CPC分类号： H03H7/48 , H03H7/21
摘要： In a .pi./2 power divider, particularly a .pi./2 hybrid for the radio-frequency antenna of a nuclear magnetic resonance tomography apparatus, a decoupling circuit having unbalanced-to-ground line transformers is provided. Each branch thereof contains an all pass network consisting unbalanced-to-ground line transformers at the output. A broadband .pi./2 hybrid is obtained particularly with a broadband 3 dB/180.degree. hybrid as the decoupling circuit.
摘要翻译：在π/ 2功率分配器中，特别是用于核磁共振断层摄影装置的射频天线的pi / 2混合器，提供了具有不平衡对地线路变压器的去耦电路。其每个分支都包含一个全输出网络，其中包括输出端的不平衡对地线路变压器。获得宽带pi / 2混合电路，特别是采用宽带3 dB / 180°混合电路作为去耦电路。

46. 发明授权

US09935350B2 Standing wave damping on a waveguide carrying a signal 有权
公开(公告)号：US09935350B2
公开(公告)日：2018-04-03
申请号：US14972304
申请日：2015-12-17
申请人： Ralph Oppelt
发明人： Ralph Oppelt
IPC分类号： H01P5/02 , H01P1/22 , H01P5/12
CPC分类号： H01P1/225
摘要： A device for damping a standing wave on a waveguide carrying a signal is provided. The device includes at least one pair of an impedance-up-transforming and an impedance-down-transforming Boucherot bridge is connected into the waveguide. The two Boucherot bridges bring about locally increased impedances and inductance values, with the result that a significantly improved standing wave suppression or damping is obtained. The down-transforming Boucherot bridge is connected directly behind the up-transforming bridge, with the result that down-transformation to the original impedance of the waveguide again can be carried out and a signal reflection can thus be avoided.

47. 发明授权

US07977944B2 Control apparatus for a magnetic resonance imaging antenna arrangement 有权
标题翻译：用于磁共振成像天线装置的控制装置
公开(公告)号：US07977944B2
公开(公告)日：2011-07-12
申请号：US12369041
申请日：2009-02-11
申请人： Ralph Oppelt , Wolfgang Renz , Wilfried Schnell
发明人： Ralph Oppelt , Wolfgang Renz , Wilfried Schnell
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/3403 , G01R33/34046 , G01R33/34076 , G01R33/3614 , G01R33/5659
摘要： An apparatus to control an antenna arrangement in a magnetic resonance apparatus has an amplifier with an input connected to a radio-frequency transmission signal to be amplified. The antenna arrangement has at least one antenna element for emission of the amplified transmission signal. The antenna element has an infeed point with two terminals, wherein the amplified transmission signal is connected at the terminals. The amplifier is connected on the output side with two terminals of the infeed point. The antenna element has at the infeed point, a mounting surface to accommodate the amplifier.
摘要翻译：用于控制磁共振装置中的天线布置的装置具有放大器，其输入端连接到要放大的射频传输信号。天线装置具有用于发射放大的发射信号的至少一个天线元件。天线元件具有两个端子的馈电点，其中放大的发送信号在端子处连接。放大器在输出侧连接有两个馈电点的端子。天线元件在馈电点处具有用于容纳放大器的安装表面。

48. 发明申请

US20100117653A1 DIPLEX FILTER AND METHOD TO FILTER SIGNALS 有权
标题翻译： DIPLEX过滤器和滤波信号的方法
公开(公告)号：US20100117653A1
公开(公告)日：2010-05-13
申请号：US12616855
申请日：2009-11-12
申请人： Ralph Oppelt
发明人： Ralph Oppelt
IPC分类号： H03H7/46 , G01V3/00 , H03H7/38
CPC分类号： H03H7/463 , H03H7/38
摘要： A diplex filter is formed by two impedance-transforming filters with separate transmission frequency ranges and with separate cut-off frequency ranges and a connection node at which two series elements of the two filters are connected. These two series elements are each fashioned as a parallel oscillating circuit, each parallel oscillating circuit exhibiting a predetermined reactance in a midband of the respective transmission frequency range and a parallel resonance in a midband of the respective cut-off frequency range. The diplex filter can be realized in a simple and cost-effective manner without ferrite-containing special components, for instance inductively coupled coils or tapped coils thereby allowing use thereof in a magnetic resonance tomograph, for example.
摘要翻译：双工滤波器由具有单独的传输频率范围和分离的截止频率范围的两个阻抗变换滤波器以及两个滤波器的两个串联元件连接的连接节点形成。这两个串联元件各自被形成为并联振荡电路，每个并联振荡电路在相应的发送频率范围的中间带中呈现预定的电抗，并且在相应截止频率范围的中间带中呈现并联谐振。双工滤波器可以以简单且成本有效的方式实现，不含铁素体的特殊部件，例如电感耦合线圈或抽头线圈，从而允许在例如磁共振断层扫描仪中使用它们。

49. 发明授权

US07672649B2 Controller for a radio-frequency amplifier 有权
标题翻译：射频放大器控制器
公开(公告)号：US07672649B2
公开(公告)日：2010-03-02
申请号：US11744291
申请日：2007-05-04
申请人： Klaus Huber , Ralph Oppelt
发明人： Klaus Huber , Ralph Oppelt
IPC分类号： H01Q11/12 , H04B1/00
CPC分类号： H03G3/3036 , G01R33/3621 , H03F1/3247 , H03F1/3282 , H03F1/3294 , H03F2200/195 , H03F2200/207 , H03F2200/336 , H03F2200/451 , H03G1/04
摘要： A controller for an RF amplifier, in particular for a RF amplifier of an MR tomography apparatus, has an IQ control element for adjusting the magnitude and phase an RF signal that is be fed to the RF amplifier. The IQ control element has a signal splitter that splits the RF signal into two partial signals having a 90° phase offset in an I path and a Q path, each having a multiplier for multiplying the partial signal by an I factor in the I path and a Q factor in the Q path. A summing unit recombines the partial signals. A detector determines the actual phase difference and actual amplification between the RF signal fed to the IQ control element and the RF signal amplified by the RF amplifier. An IQ controller determines the I factor and the Q factor from the actual difference and a desired phase difference and the actual amplifier and a desired amplification. The IQ controller has an operating point at which the I factor and the Q factor are the same magnitude if the actual and desired phase differences and the actual and desired amplifications are the same.
摘要翻译：用于RF放大器的控制器，特别是用于MR断层摄影装置的RF放大器的控制器具有用于调整幅度和相位的IQ控制元件，RF信号被馈送到RF放大器。 IQ控制元件具有信号分离器，其将RF信号分解成在I路径和Q路径中具有90°相位偏移的两个部分信号，每个具有用于将该部分信号乘以I路径中的I因子的乘法器和Q路径， Q路径中的Q因子。求和单元重新组合部分信号。检测器确定馈送到IQ控制元件的RF信号与由RF放大器放大的RF信号之间的实际相位差和实际放大。 IQ控制器根据实际差异和所需的相位差以及实际的放大器和所需的放大率来确定I因子和Q因子。如果实际和所需的相位差以及实际和所需的放大倍数相同，则IQ控制器具有I因子和Q因子的幅度相同的工作点。

50. 发明授权

US07183855B2 Circuit arrangement for the switchable amplification of variable electrical signals 有权
标题翻译：用于可变电信号的可切换放大的电路布置
公开(公告)号：US07183855B2
公开(公告)日：2007-02-27
申请号：US10959303
申请日：2004-10-07
申请人： Klaus Huber , Ralph Oppelt
发明人： Klaus Huber , Ralph Oppelt
IPC分类号： H03F3/68
CPC分类号： H03F3/72 , H03F2203/7239 , H03G1/0088 , H03G3/004 , H03G2201/506
摘要： Circuit arrangement for the switchable amplification of variable electrical signals having at least one signal input and a signal output. A switchable amplifier is present between signal input and signal output and is provided with an input, with an output and with a negative feedback path having at least one resistor between input and output. The circuit arrangement further comprises a voltage source, the polarity of which can be reversed by a switching element. In this case, the negative feedback path has a switchable bypass connected in parallel with the at least one resistor. The signals fed in at the amplifier input are furthermore to be fed to the amplifier output in amplified fashion via a first signal path or in unamplified fashion via a second signal path depending on the polarity of the voltage source.
摘要翻译：用于具有至少一个信号输入和信号输出的可变电信号的可切换放大的电路布置。在信号输入和信号输出之间存在可切换放大器，并且具有输入，输出端和负反馈路径在输入和输出之间具有至少一个电阻器。电路装置还包括一个电压源，其极性可被开关元件反转。在这种情况下，负反馈路径具有与至少一个电阻器并联连接的可切换旁路。在放大器输入端馈送的信号还经由第一信号路径以放大方式被馈送到放大器输出端，或者根据电压源的极性经由第二信号路径以非放大方式馈送到放大器输出端。

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