公开(公告)号：US20090096455A1

公开(公告)日：2009-04-16

申请号：US12243038

申请日：2008-10-01

Applicant: Stephan Biber ,  Jan Bollenbeck ,  Ralph Oppelt ,  Markus Vester

Inventor： Stephan Biber ,  Jan Bollenbeck ,  Ralph Oppelt ,  Markus Vester

IPC: G01R33/36

CPC classification number: G01R33/3415 ,  G01R33/3621 ,  G01R33/3664 ,  G01R33/3692

Abstract: An arrangement to transmit magnetic resonance signals has at least two reception branches. Each reception branch contains a single antenna of a local coil as well as an amplifier connected with the single antenna, such that an amplified magnetic resonance signal is formed from a magnetic resonance signal that is acquired via the single antenna. In a multiplexer, each input is connected with a respective reception branch, such that the amplified magnetic resonance signals of the reception branch are combined by the multiplexer into a resulting signal using a time multiplexing method. A transmission path is connected on one side with an output of the multiplexer and on the other side with a receiver, such that the resulting signal is transmitted from the multiplexer to the receiver via the transmission path.

Abstract translation: 传输磁共振信号的装置具有至少两个接收分支。 每个接收分支包含本地线圈的单个天线以及与单个天线连接的放大器，使得经由单个天线获取的磁共振信号形成放大的磁共振信号。 在多路复用器中，每个输入与相应的接收分支相连，使得接收分支的放大的磁共振信号由多路复用器使用时间复用方法组合成结果信号。 传输路径在一侧与多路复用器的输出端连接，另一侧与接收器连接，使得所得到的信号经由传输路径从多路复用器传输到接收器。

公开(公告)号：US07183855B2

公开(公告)日：2007-02-27

申请号：US10959303

申请日：2004-10-07

Applicant: Klaus Huber ,  Ralph Oppelt

Inventor： Klaus Huber ,  Ralph Oppelt

IPC: H03F3/68

CPC classification number: H03F3/72 ,  H03F2203/7239 ,  H03G1/0088 ,  H03G3/004 ,  H03G2201/506

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20070040612A1

公开(公告)日：2007-02-22

申请号：US11502846

申请日：2006-08-11

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: H03F3/26

CPC classification number: H03F1/34 ,  H03F3/3066 ,  H03F2200/534 ,  H03F2200/541 ,  H03F2203/30036 ,  H03F2203/30144

Abstract: The push-pull amplifier with transformational negative feedback is provided for amplification of variable electrical signals. It includes a signal input and a signal output, a transformational negative feedback connected with the signal input and the signal output and an amplifier circuit. The amplifier circuit includes an input and an output as well as a first transistor and a second transistor. The input of the amplifier circuit is thereby connected with the signal input and the output of the amplifier circuit is thereby connected with the signal output via the transformational negative feedback.

Abstract translation: 具有变换负反馈的推挽放大器用于放大可变电信号。 它包括信号输入和信号输出，与信号输入和信号输出连接的变换负反馈和放大器电路。 放大器电路包括输入和输出以及第一晶体管和第二晶体管。 因此，放大器电路的输入端与信号输入端连接，放大电路的输出由此通过变换负反馈与信号输出端连接。

公开(公告)号：US20060266947A1

公开(公告)日：2006-11-30

申请号：US11438209

申请日：2006-05-23

Applicant: Robert Krieg ,  Rainer Kuth ,  Ralf Ladebeck ,  Ralph Oppelt ,  Sebastian Schmidt ,  Markus Vester

Inventor： Robert Krieg ,  Rainer Kuth ,  Ralf Ladebeck ,  Ralph Oppelt ,  Sebastian Schmidt ,  Markus Vester

IPC: G01T1/166

CPC classification number: G01T1/2985 ,  A61B6/037 ,  G01R33/481

Abstract: A method is disclosed for determining positron emission measurement information in the context of positron emission tomography. The method includes carrying out a positron emission measurement, in a body area of a subject to be examined, to record positron emission measurement information with point resolution and determining a time frame of the measurement by, at the same time, generating images of the body area to be examined with a relatively higher time resolution and with point-resolved image data, using a second imaging method. Further, a local shift of points of individual images of the second imaging method is determined, caused by movement processes of the subject to be examined, and as a function thereof, of the positron emission measurement information for at least a part of the measurement period and of the body area to be examined. Finally, the positron emission measurement information is adjusted as a function of the determined shift.

Abstract translation: 公开了一种用于在正电子发射断层摄影的背景下确定正电子发射测量信息的方法。 该方法包括在待检查对象的身体区域中进行正电子发射测量，以记录具有点分辨率的正电子发射测量信息，并且通过同时生成身体的图像来确定测量的时间范围 使用第二成像方法以相对较高的时间分辨率和点分辨图像数据进行检查的区域。 此外，由第二成像方法的各个图像的点的局部偏移由待检查对象的移动处理确定，并且作为其功能，确定至少部分测量周期的正电子发射测量信息 以及要检查的身体区域。 最后，调整正电子发射测量信息作为确定的位移的函数。

公开(公告)号：US06714093B2

公开(公告)日：2004-03-30

申请号：US10262329

申请日：2002-10-01

Applicant: Ralph Oppelt ,  Markus Vester

Inventor： Ralph Oppelt ,  Markus Vester

IPC: H04B164

CPC classification number: H04B1/64

Abstract: In a dynamics compressor, an analog signal to be compressed is supplied to a first amplifier stage as an input signal, and the output signal thereof is supplied to the next amplifier stage as an input signal, and so on for a number of successive amplifier stages. Each amplifier stage amplifies its input signal with a stage amplification until it reaches a stage limit level. The analog signal and the respective output signals of the amplifier stages are summed in a summation stage to form a sum signal. Above a minimal level, the magnitude of the curve of the sum signalroughly corresponds to an exponent characteristic of the magnitude of the analog signal.

Abstract translation: 在动态压缩器中，要被压缩的模拟信号作为输入信号被提供给第一放大器级，并且其输出信号作为输入信号提供给下一个放大器级，并且等于多个连续的放大器级 。 每个放大器级用级放大放大其输入信号，直到达到级限。 放大器级的模拟信号和各个输出信号在求和级相加以形成和信号。 高于最小电平，总和信号的曲线的大小对应于模拟信号幅度的指数特性。

公开(公告)号：US06212131B1

公开(公告)日：2001-04-03

申请号：US09333321

申请日：1999-06-15

Applicant: Ralph Oppelt ,  Wolfgang Renz

Inventor： Ralph Oppelt ,  Wolfgang Renz

IPC: H04B102

CPC classification number: B06B1/0207 ,  A61B17/22004 ,  B06B2201/76

Abstract: An ultrasound transmitting circuit includes an electrical transmitter from which electrical oscillations can be fed at an electrical transmission power level over a connecting line into an ultrasound transducer. The electrical oscillations are formed of a current signal and a voltage signal. The ultrasound transducer can be excited by the electrical oscillations to produce ultrasound oscillations. In order to allow ultrasound oscillation power to be controlled more accurately, the current signal and the voltage signal can be supplied to a phase regulator. A variable impedance, which is coupled to the connecting line, can be actuated by the phase regulator in such a manner that the current signal and the voltage signal are in phase.

Abstract translation: 超声波发射电路包括电发射器，电连接线上的电振荡可以以电传输功率电平馈入超声换能器。 电振荡由电流信号和电压信号形成。 超声换能器可以被电振荡激发以产生超声振荡。 为了更准确地控制超声波振荡功率，可以将电流信号和电压信号提供给相位调节器。 耦合到连接线的可变阻抗可以由相位调节器以使得电流信号和电压信号同相的方式来致动。

公开(公告)号：US6074346A

公开(公告)日：2000-06-13

申请号：US883779

申请日：1997-06-27

Applicant: Ralph Oppelt

Inventor： Ralph Oppelt

IPC: B06B1/02 ,  G01S7/524 ,  G01S7/526 ,  A61B8/00

CPC classification number: B06B1/0215 ,  G01S7/524 ,  G01S7/526 ,  G01S7/5202

Abstract: A transmit/receive circuit employing passive elements. A transmit/receive circuit according to an embodiment of the present invention includes a transformer having a primary winding coupled to an input stage and an output stage. A transducer is coupled to the secondary winding of the transformer. A diode limiter is coupled to the input stage and a diode bridge is coupled to a node at the output stage. The input and output stages are alternatingly grounded. An output switch including an inverse parallel circuit of two diodes having opposite polarities may be connected at the output stage between a transmitter and the transformer. Alternatively, a complementary common emitter amplifier may be provided at the output stage. The circuit thus electrically couples the transducer element to the receiver during reception and electrically decouples both the transducer and the transmitter from the receiver during transmission. The circuit further electrically couples the transducer to the transmitter during transmission and electrically decouples both the transducer element and the receiver from the transmitter during reception.

Abstract translation: 采用无源元件的发射/接收电路。 根据本发明的实施例的发射/接收电路包括具有耦合到输入级和输出级的初级绕组的变压器。 传感器耦合到变压器的次级绕组。 二极管限制器耦合到输入级，二极管桥耦合到输出级的一个节点。 输入和输出级交替接地。 包括具有相反极性的两个二极管的反并联电路的输出开关可以在发射器和变压器之间的输出级连接。 或者，可以在输出级提供互补公共发射极放大器。 因此，电路在接收期间将换能器元件电耦合到接收器，并且在传输期间将换能器和发射器与接收器电耦合。 该电路在传输期间进一步电耦合传感器到发射器，并且在接收期间将换能器元件和接收器与发射器电耦合。

公开(公告)号：US5609154A

公开(公告)日：1997-03-11

申请号：US425631

申请日：1995-04-20

Applicant: Ralph Oppelt ,  Markus Vester

Inventor： Ralph Oppelt ,  Markus Vester

IPC: G01S7/523 ,  G10K11/34 ,  H03K17/76 ,  A61B8/00

CPC classification number: H03K17/76 ,  G01S7/523 ,  G10K11/341

Abstract: A duplexer for an ultrasound imaging-system capable of selectively coupling a transducer element to either a transmitter or a receiver, depending on whether the imaging system is in the transmit mode or receive mode, contains a variable capacitance diode which is connected in a direction opposite that of transmit pulses emitted by the transmitter between the transducer element and the receiver. In this manner, one obtains an improved duplexer that operates with virtually no power loss, without drive circuits, without leakage currents, and with low noise.

Abstract translation: 根据成像系统是处于发射模式还是接收模式，能够选择性地将换能器元件耦合到发射器或接收器的超声成像系统的双工器包含可变电容二极管，其以相反的方向连接 发射机在传感器元件和接收器之间发射的发射脉冲。 以这种方式，获得一种改进的双工器，其实际上没有功率损耗，没有驱动电路，没有漏电流，并且噪声低。

公开(公告)号：US5523689A

公开(公告)日：1996-06-04

申请号：US420213

申请日：1995-04-11

Applicant: Ralph Oppelt ,  Wilhelm Duerr

Inventor： Ralph Oppelt ,  Wilhelm Duerr

IPC: G01R33/20 ,  A61B5/055 ,  G01R33/34 ,  G01R33/36 ,  G01R33/422 ,  H01Q1/36 ,  G01V3/00

CPC classification number: G01R33/34046 ,  G01R33/34007 ,  G01R33/422 ,  G01R33/56518

Abstract: A radio-frequency antenna for a magnetic resonance apparatus has an antenna conductor in the form of a ribbon conductor. The ribbon antenna conductor has interconnects arranged side-by-side. Neighboring interconnects are connected to one another via bridges that conduct radio-frequency currents.

Abstract translation: 用于磁共振装置的射频天线具有带状导体形式的天线导体。 带状天线导体具有并排布置的互连。 相邻的互连通过传导射频电流的桥连接。

公开(公告)号：US5260658A

公开(公告)日：1993-11-09

申请号：US802542

申请日：1991-12-05

Applicant: Helmut Greim ,  Juergen Ruhl ,  Ralph Oppelt

Inventor： Helmut Greim ,  Juergen Ruhl ,  Ralph Oppelt

IPC: G01R33/44 ,  G01R33/36 ,  G01B33/20

CPC classification number: G01R33/3628

Abstract: A circuit for detuning a resonator in a nuclear magnetic resonance imaging apparatus has an output connected to a terminal of the resonator via a high-frequency line composed of two conductors. The resonator is shortened at this terminal with a shorting capacitor that can be short-circuited for detuning the resonator. The length of the high-frequency line is shorter than one-fourth of the wavelength of a high-frequency signal having the operating frequency of the nuclear magnetic resonance imaging apparatus on the high-frequency line. For detuning the resonator the high-frequency line can be terminated at the output with a further capacitor, so that the high-frequency line acts as a short-circuit at the terminal.

Abstract translation: 用于使核磁共振成像装置中的谐振器失谐的电路具有通过由两根导体组成的高频线连接到谐振器的端子的输出端。 谐振器在该端子处被缩短，其中短路电容器可以短路以使谐振器失谐。 高频线的长度比具有高频线上的核磁共振成像装置的工作频率的高频信号的波长的四分之一短。 为了使谐振器失谐，高频线路可以在另一个电容器的输出处终止，使得高频线路作为端子处的短路。