公开(公告)号：US07504883B2

公开(公告)日：2009-03-17

申请号：US11674254

申请日：2007-02-13

申请人： Jan Bollenbeck ,  Ralph Oppelt

发明人： Jan Bollenbeck ,  Ralph Oppelt

IPC分类号： H03F3/26

CPC分类号： H03F3/68 ,  H03F3/189

摘要： An amplifier device including at least one operational amplifier, whereby a transformer is connected upstream from the input of the operational amplifier and the output signal of the operational amplifier or a signal generated from this output signal is fed back again to the input of the operational amplifier via a path with a predetermined resistance whereby the feedback signal is fed back before the input of the transformer whereby the transformer is designed or connected in a signal-inverting manner.

摘要翻译： 一种放大器装置，包括至少一个运算放大器，其中变压器连接到运算放大器的输入端和运算放大器的输出信号的上游，或从该输出信号产生的信号反馈到运算放大器的输入端 通过具有预定电阻的路径，由此反馈信号在变压器的输入之前反馈，由此变压器以信号反相方式被设计或连接。

公开(公告)号：US07482592B2

公开(公告)日：2009-01-27

申请号：US11438208

申请日：2006-05-23

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

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

IPC分类号： G01T1/166

CPC分类号： G01T1/2985 ,  A61B6/037 ,  A61B6/507 ,  G01R33/481 ,  G01T1/1603

摘要： A method for determining positron emission measurement information in the context of positron emission tomography is disclosed. The method includes using a marker substance to carry out a positron emission measurement, in a body area of a subject to be examined, to determine positron emission measurement information, and at the same time, generating images of the body area to be examined by way of a second medical method with a time resolution suitable for determining perfusion and/or diffusion information. The method further includes using the images from the second method to determine perfusion and/or diffusion information for at least a part of the measurement period, and evaluating the positron emission measurement information as a function of the perfusion and/or diffusion information.

摘要翻译： 公开了一种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。 该方法包括使用标记物质进行待检查对象的身体区域中的正电子发射测定，以确定正电子发射测量信息，并且同时生成要检查的身体区域的图像 具有适合于确定灌注和/或扩散信息的时间分辨率的第二医疗方法。 该方法还包括使用来自第二方法的图像来确定至少部分测量周期的灌注和/或扩散信息，以及作为灌注和/或扩散信息的函数来评估正电子发射测量信息。

公开(公告)号：US20070259630A1

公开(公告)日：2007-11-08

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： H04B1/04 ,  H01Q11/12

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。

公开(公告)号：US07126337B2

公开(公告)日：2006-10-24

申请号：US11200815

申请日：2005-08-10

申请人： Ralph Oppelt

发明人： Ralph Oppelt

IPC分类号： G01V3/00

CPC分类号： G01R33/3657 ,  G01R33/341

摘要： A reception unit for a magnetic resonance tomography apparatus has an RF preamplifier connected at its signal input to a local coil with a PIN diode connected in parallel with the signal input and a supply voltage connection of the RF preamplifier being connected to a direct voltage source. The reception unit has a supply node that is connected with the supply voltage connection, the PIN diode and a cross-over switch for alternating connection of the supply node to the direct voltage source or a direct current source.

摘要翻译： 用于磁共振断层摄影装置的接收单元具有在其信号输入端连接到本地线圈的RF前置放大器，其中PIN二极管与信号输入并联连接，并且RF前置放大器的电源电压连接连接到直流电压源。 接收单元具有与电源电压连接的供电节点，PIN二极管和用于将供电节点交替连接到直流电压源或直流电源的交叉开关。

公开(公告)号：US07064628B2

公开(公告)日：2006-06-20

申请号：US10917913

申请日：2004-08-13

申请人： Ralph Oppelt ,  Markus Vester

发明人： Ralph Oppelt ,  Markus Vester

IPC分类号： H01P1/10 ,  H01P1/15

CPC分类号： H04L49/101

摘要： A crossbar switch comprises a number of crossing points at which controllable switch elements are arranged, via which an input signal supplied to a row can be interconnected to a column intersecting this row at this crossing point when an interconnection signal is supplied to the respective setting parameter via a control input. The controllable switch elements comprise amplifier elements whose amplifier inputs are connected with the rows and whose amplifier outputs are connected with the columns. The amplifier elements are wired such that they only consume electrical energy when the interconnection signal is supplied to the respective crossing point.

摘要翻译： 交叉开关包括多个交叉点，在该交叉点处布置有可控开关元件，当互连信号被提供给相应的设置参数时，提供给行的输入信号可以通过该交叉点互连到在该交叉点与该行相交的列 通过控制输入。 可控开关元件包括其放大器输入与行连接并且其放大器输出与列连接的放大器元件。 放大器元件被布线，使得当互连信号被提供给相应的交叉点时它们仅消耗电能。

公开(公告)号：US06943643B2

公开(公告)日：2005-09-13

申请号：US10730275

申请日：2003-12-09

申请人： Ralph Oppelt

发明人： Ralph Oppelt

IPC分类号： H01P5/12 ,  H03H7/20 ,  H03H7/21 ,  H03H7/40 ,  H03K3/00

CPC分类号： H03H7/20 ,  H03H7/21

摘要： A controllable two-phase network for production of two output signals at two loads with identical load impedances from an input signal from a source containing a phase path for production of a first output signal, and an amplitude path for production of a second output signal, from the input signal. The phase path contains a trimming resistance and a trimming capacitance in order to influence the phase shift between the input signal and the first output signal. The amplitude path contains a compensation circuit for matching the amplitude of the second output signal to the amplitude of the first output signal. In particular, the two-phase network is designed such that the two output signals have the same amplitude, and the phase of the first output signal has a constant phase shift with respect to that of the second output signal.

摘要翻译： 一种可控两相网络，用于在来自包含用于产生第一输出信号的相位路径的源的输入信号和用于产生第二输出信号的幅度路径的相同负载阻抗的两个负载处产生两个输出信号， 从输入信号。 相位路径包含微调电阻和微调电容，以便影响输入信号和第一输出信号之间的相移。 振幅路径包含补偿电路，用于将第二输出信号的振幅与第一输出信号的振幅相匹配。 特别地，两相网络被设计为使得两个输出信号具有相同的幅度，并且第一输出信号的相位相对于第二输出信号的相位具有恒定的相移。

公开(公告)号：US20050189940A1

公开(公告)日：2005-09-01

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： A61B5/055 ,  G01R33/34 ,  G01R33/3415 ,  G01R33/36 ,  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。

公开(公告)号：US20050104655A1

公开(公告)日：2005-05-19

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： H03G1/00 ,  H03G3/00 ,  H03F1/14

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。

公开(公告)号：US20050041496A1

公开(公告)日：2005-02-24

申请号：US10917913

申请日：2004-08-13

申请人： Ralph Oppelt ,  Markus Vester

发明人： Ralph Oppelt ,  Markus Vester

IPC分类号： G11C17/00 ,  H03K17/62 ,  H04L12/56 ,  H04Q3/52

CPC分类号： H04L49/101

摘要： A crossbar switch comprises a number of crossing points at which controllable switch elements are arranged, via which an input signal supplied to a row can be interconnected to a column intersecting this row at this crossing point when an interconnection signal is supplied to the respective setting parameter via a control input. The controllable switch elements comprise amplifier elements whose amplifier inputs are connected with the rows and whose amplifier outputs are connected with the columns. The amplifier elements are wired such that they only consume electrical energy when the interconnection signal is supplied to the respective crossing point.

摘要翻译： 交叉开关包括多个交叉点，在该交叉点处布置有可控开关元件，当互连信号被提供给相应的设置参数时，提供给行的输入信号可以通过该交叉点互连到在该交叉点与该行相交的列 通过控制输入。 可控开关元件包括其放大器输入与行连接并且其放大器输出与列连接的放大器元件。 放大器元件被布线，使得当互连信号被提供给相应的交叉点时它们仅消耗电能。

公开(公告)号：US06704589B1

公开(公告)日：2004-03-09

申请号：US10048279

申请日：2002-01-28

申请人： Ralph Oppelt ,  Markus Vester

发明人： Ralph Oppelt ,  Markus Vester

IPC分类号： A61B505

CPC分类号： G01H9/008 ,  G01H3/125

摘要： The invention relates to a method and a device for taking an image 2 of an object surface 1 by means of a focusable radiation 3. An array of object elements 4 that covers the object surface is defined; then, for each object element 1, a first signal of the radiation that is focused onto an associated transmitter line 5, including said object element, in the object surface is emitted, and a second signal of the radiation that is generated by means of said first signal and is focused onto an associated receiver line 6, including the object element and crossing said transmitter line, in the object surface is received and an associated image information item is picked up therefrom; finally, the image is composed from the image information items of all the object elements.

摘要翻译： 本发明涉及一种通过可聚焦辐射3拍摄物体表面1的图像2的方法和装置。定义了覆盖物体表面的物体元件阵列4; 然后，对于每个物体元件1，发射在物体表面中聚焦到包括所述物体元件的相关联的发射器线5上的辐射的第一信号，以及通过所述物体元件1产生的辐射的第二信号 第一信号并被聚焦到相关联的接收机线路6上，包括物体元件并且穿过所述发射机线路，在物体表面中被接收并且从其中拾取相关联的图像信息项目; 最后，从所有对象元素的图像信息项构成图像。