Patents by Inventor Ralph Oppelt
Ralph Oppelt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8379549Abstract: In a method and device for the transmission of a multiplicity of signals having different frequencies between a base station and a module situated at a location remote from the base station via a single, common cable connection, some of the signals being transmitted from the electronic assembly to the module and, in general simultaneously, the remaining signals are transmitted in the opposite direction. Each of the base station and the module has bandpass filter bank therein having a multiplicity of bandpass filters, the number thereof being a function of the number of channels to be transmitted, with which the respectively received signals are spectrally separated from one another so that they are available for further signal processing in the base station, or for further use in the module.Type: GrantFiled: December 23, 2009Date of Patent: February 19, 2013Assignee: Siemens AktiengesellschaftInventors: Ralph Oppelt, Markus Vester
-
Patent number: 8360962Abstract: A system measures a change in position of a medical appliance, such as an endoscopy capsule. A device uses this measurement in order to influence the position of the medical appliance. The medical appliance sends a signal that is received by a multiplicity of spatially separate receiving devices. The time profile of the phase differences between the received signals and a reference signal provides an indication of whether the medical appliance has moved. In the event of a movement being detected, a maneuvering device can be regulated by a regulating means in such a way that the maneuvering device generates forces and/or torques and applies them to the medical appliance to counteract the detected movement.Type: GrantFiled: December 8, 2008Date of Patent: January 29, 2013Assignee: Siemens AktiengesellschaftInventors: Dirk Diehl, Ralph Oppelt, Johannes Reinschke
-
Publication number: 20120235723Abstract: A circuit for providing an AC signal includes an amplifier having an input and an output. A sinusoidal signal is applicable at the input of the amplifier. The output of the amplifier is connected to the input via a lowpass filter or via a part of the lowpass filter.Type: ApplicationFiled: September 12, 2011Publication date: September 20, 2012Inventor: Ralph Oppelt
-
Patent number: 8217657Abstract: 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.Type: GrantFiled: November 12, 2009Date of Patent: July 10, 2012Assignee: Siemens AktiengesellschaftInventor: Ralph Oppelt
-
Publication number: 20120089007Abstract: Timing in a medical imaging system. The system comprises a magnetic resonance imaging (MRI) subsystem and a non-MRI subsystem. Operation of the non-MRI subsystem involves a timing signal within a radio frequency (RF) cabin of the MRI subsystem. Basing each non-MRI subsystem timing signal on a time base common between the MRI subsystem and the non-MRI subsystem. The non-MRI subsystem can be a medical imaging subsystem. The non-MRI medical imaging subsystem can be a positron emission tomography (PET) subsystem. Each non-MRI subsystem timing signal that based on the common time base can be created using the same model of equipment used for creating timing signals in the MRI subsystem. At least one stage of the non-MRI subsystem timing signal based on the common time base can be created using the same equipment used for creating timing signals in the MRI subsystem.Type: ApplicationFiled: October 12, 2010Publication date: April 12, 2012Applicants: SIEMENS AKTIENGESELLSCHAFT, SIEMENS MEDICAL SOLUTIONS USA, INC.Inventors: James Frank Caruba, Ralf Ladebeck, Ralph Oppelt, Patanit Sanpitak
-
Publication number: 20120071117Abstract: Front bandpass filters that are essentially transmissive only between a minimum frequency and a maximum frequency filter the magnetic resonance signals. Front frequency mixers mix output signals of each of the bandpass filters with a front LO frequency that is standard for all the magnetic resonance signals. Rear bandpass filters that are essentially transmissive only around a front intermediate frequency filter the output signals of the front frequency mixers. Rear frequency mixers mix output signals of each of the rear bandpass filters with a respective constant rear LO frequency. Frequency filters that are transmissive for frequencies in the range of the difference of the rear LO frequency that is supplied to the rear frequency mixer arranged upstream thereof and the front intermediate frequency filter the output signals of the rear frequency mixers. Output signals of the frequency filters are combined into a common signal, which is transmitted onward.Type: ApplicationFiled: March 22, 2011Publication date: March 22, 2012Inventors: STEPHAN BIBER, Jan Bollenbeck, Ralph Oppelt, Markus Vester
-
Publication number: 20120020259Abstract: A preprocessing circuit for receive signals of a local coil in a magnetic resonance facility (1) includes an arrangement for supplying at least one auxiliary frequency signal of an auxiliary frequency. For at least one or the auxiliary frequency signal, a frequency multiplier generates the auxiliary frequency signal from an intermediate signal transmitted from a receive system of the magnetic resonance facility by way of a transmission link. The multiplier generates the auxiliary frequency signal with a frequency corresponding to a whole-number fraction of the auxiliary frequency.Type: ApplicationFiled: July 14, 2011Publication date: January 26, 2012Inventors: Jan Bollenbeck, Ralph Oppelt
-
Patent number: 8055196Abstract: An arrangement for transmitting magnetic resonance signals, with a transmission link that connects a local coil with a receiver, has a first channel of the local coil with a first single antenna to acquire a first magnetic resonance signal, as well as a first mixer connected with the first single antenna. The first mixer forms an intermediate-frequency first signal from the supplied first magnetic resonance signal. A second channel of the local coil has a second single antenna to acquire a second magnetic resonance signal, as well as a second mixer connected with the second single antenna. The second mixer forms an intermediate-frequency second signal from the supplied second magnetic resonance signal. The local coil has a device for signal combination that, by frequency multiplexing, that combines the intermediate-frequency first signal of the first channel and the intermediate-frequency second signal of the second channel so that it arrives at the receiver via the transmission path.Type: GrantFiled: May 13, 2009Date of Patent: November 8, 2011Assignee: Siemens AktiengesellschaftInventors: Stephan Biber, Jan Bollenbeck, Ralph Oppelt, Markus Vester
-
Patent number: 7977944Abstract: 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.Type: GrantFiled: February 11, 2009Date of Patent: July 12, 2011Assignee: Siemens AktiengesellschaftInventors: Ralph Oppelt, Wolfgang Renz, Wilfried Schnell
-
Patent number: 7890070Abstract: A filter circuit arrangement for filtering of a radio-frequency signal has a first tunable filter and a phase regulation loop in order to hold the first tunable filter to a transmission phase constant relative to the frequency of the radio-frequency signal. The filter circuit arrangement has a second tunable filter arranged parallel to the first tunable filter in the phase regulation loop. The first tunable filter and the second tunable filter exhibit different attenuation characteristics and are fashioned and connected within the phase regulation loop so that: a capture range of the filter circuit arrangement, in which a tuning of the phase regulation loop to a radio-frequency signal to be filtered is possible is dominated by the attenuation characteristic of the second tunable filter, and so that the transmission behavior of the filter circuit arrangement in operation is dominated by the attenuation characteristic of the first tunable filter, given a tuned phase regulation loop.Type: GrantFiled: November 9, 2007Date of Patent: February 15, 2011Assignee: Siemens AktiengesellschaftInventors: Jan Bollenbeck, Ralph Oppelt
-
Patent number: 7834628Abstract: 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.Type: GrantFiled: October 1, 2008Date of Patent: November 16, 2010Assignee: Siemens AktiengesellschaftInventors: Stephan Biber, Jan Bollenbeck, Ralph Oppelt, Markus Vester
-
Publication number: 20100274086Abstract: A system measures a change in position of a medical appliance, such as an endoscopy capsule. A device uses this measurement in order to influence the position of the medical appliance. The medical appliance sends a signal that is received by a multiplicity of spatially separate receiving devices. The time profile of the phase differences between the received signals and a reference signal provides an indication of whether the medical appliance has moved. In the event of a movement being detected, a maneuvering device can be regulated by a regulating means in such a way that the maneuvering device generates forces and/or torques and applies them to the medical appliance to counteract the detected movement.Type: ApplicationFiled: December 8, 2008Publication date: October 28, 2010Inventors: Dirk Diehl, Ralph Oppelt, Johannes Reinschke
-
Patent number: 7761060Abstract: In a method and apparatus for transmission of signals, an input signal is supplied to at least one dynamic compressor and the dynamics of the signal is compressed by the dynamic compressor with a degree of compression. The compressed signal is subsequently adapted, in particular limited, in terms of its frequency bandwidth dependent on the degree of compression, such as directly dependent on the degree of compression or dependent on a reference value directly associated with the degree of compression, such as the input level of the signal before the dynamic compressor.Type: GrantFiled: October 14, 2005Date of Patent: July 20, 2010Assignee: Siemens AktiengesellschaftInventor: Ralph Oppelt
-
Publication number: 20100157859Abstract: In a method and device for the transmission of a multiplicity of signals having different frequencies between a base station and a module situated at a location remote from the base station via a single, common cable connection, some of the signals being transmitted from the electronic assembly to the module and, in general simultaneously, the remaining signals are transmitted in the opposite direction. Each of the base station and the module has bandpass filter bank therein having a multiplicity of bandpass filters, the number thereof being a function of the number of channels to be transmitted, with which the respectively received signals are spectrally separated from one another so that they are available for further signal processing in the base station, or for further use in the module.Type: ApplicationFiled: December 23, 2009Publication date: June 24, 2010Inventors: Ralph Oppelt, Markus Vester
-
Patent number: 7737787Abstract: An amplifier circuit has a transistor element that has an input terminal, an output terminal) and a third terminal. An input signal to be amplified is supplied to the input terminal. The amplified input signal is emitted as an output signal at the output terminal. The input terminal is connected with the output terminal via a first reactance. The third terminal is connected via a second reactance with a zero potential. One of the reactances is fashioned as an inductor and the other of the reactances is fashioned as a capacitor. An inductance value of the inductor and a capacitance value of the capacitor are dimensioned such that the quotient of the inductance value of the inductor and the capacitance value of the capacitor is equal to the product of a desired input impedance that is effective at the input terminal and an output impedance associated with the output impedance.Type: GrantFiled: December 10, 2008Date of Patent: June 15, 2010Assignee: Siemens AktiengesellschaftInventors: Ralph Oppelt, Markus Vester
-
Publication number: 20100117653Abstract: 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.Type: ApplicationFiled: November 12, 2009Publication date: May 13, 2010Inventor: Ralph Oppelt
-
Patent number: 7683330Abstract: 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.Type: GrantFiled: May 23, 2006Date of Patent: March 23, 2010Assignee: Siemens AktiengesellschaftInventors: Robert Krieg, Rainer Kuth, Ralf Ladebeck, Ralph Oppelt, Sebastian Schmidt, Markus Vester
-
Patent number: 7672649Abstract: 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.Type: GrantFiled: May 4, 2007Date of Patent: March 2, 2010Assignee: Siemens AktiengesellschaftInventors: Klaus Huber, Ralph Oppelt
-
Publication number: 20090286478Abstract: An arrangement for transmitting magnetic resonance signals, with a transmission link that connects a local coil with a receiver, has a first channel of the local coil with a first single antenna to acquire a first magnetic resonance signal, as well as a first mixer connected with the first single antenna. The first mixer forms an intermediate-frequency first signal from the supplied first magnetic resonance signal. A second channel of the local coil has a second single antenna to acquire a second magnetic resonance signal, as well as a second mixer connected with the second single antenna. The second mixer forms an intermediate-frequency second signal from the supplied second magnetic resonance signal. The local coil has a device for signal combination that, by frequency multiplexing, that combines the intermediate-frequency first signal of the first channel and the intermediate-frequency second signal of the second channel so that it arrives at the receiver via the transmission path.Type: ApplicationFiled: May 13, 2009Publication date: November 19, 2009Inventors: Stephan Biber, Jan Bollenbeck, Ralph Oppelt, Markus Vester
-
Publication number: 20090201022Abstract: 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.Type: ApplicationFiled: February 11, 2009Publication date: August 13, 2009Inventors: Ralph Oppelt, Wolfgang Renz, Wilfried Schnell