Patents by Inventor Uvo Holscher

Uvo Holscher 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).

  • Publication number: 20200116807
    Abstract: Eddy current induced magnetic fields (MF) are compensated in a magnetic resonance imaging system. An MR-sequence (M) includes a number of gradients. A dataset includes values of an amplitude and a time constant of eddy current fields of a number of gradients on at least one gradient axis. A number of points in time within the time period of the MR-sequence are defined. A number of constant currents are calculated for a number of coils of the magnetic resonance imaging system based on the dataset. The number of constant currents is designed to compensate at least at the one defined point in time (PT1, PT2). The calculated number of constant currents are applied on the related coils prior or during the application of the MR-sequence or a section of the MR-sequence.
    Type: Application
    Filed: October 10, 2019
    Publication date: April 16, 2020
    Inventors: Uvo Hölscher, Michael Köhler, Daniel Niederlöhner, Alto Stemmer
  • Patent number: 10502805
    Abstract: The disclosure relates to a method for processing movement signals detected during a magnetic resonance scan of a patient, and to a corresponding magnetic resonance device and a computer program product. According to the method, RF pulses are generated by a RF transmitting unit of a magnetic resonance device in order to excite nuclear spins in the body of the patient. Magnetic resonance signals are generated by the excited nuclear spins. For spatial encoding of the magnetic resonance signals, gradient pulses are generated by a gradient coil unit of the magnetic resonance device. The magnetic resonance signals are detected by a RF receiving unit of the magnetic resonance device. Furthermore, movement signals of the patient are detected by a movement detection unit during detection of the magnetic resonance signals, and these are processed by a processing unit.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: December 10, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Ralf Kartäusch, Uvo Hölscher
  • Patent number: 10422844
    Abstract: A method for setting a MRI sequence, a magnetic resonance device, and a computer program product are provided. The method includes providing, by a limitation unit, at least one limitation; providing, by a parameter provision unit, a plurality of parameters of the sequence, wherein at least one parameter of the plurality of parameters is assigned to a default parameter value; selecting, by a selection unit, a parameter of the plurality of parameters; determining, by a simulation unit, at least one sequential pattern based on at least one default parameter value of the default parameter values; determining, by an analysis unit, a permissible range of parameter values of the selected parameter based on at least one sequential pattern and the at least one limitation; and establishing, by an establishment unit, a new parameter value of the selected parameter within the permissible range of the parameter values.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: September 24, 2019
    Assignee: Siemens Healthcare GmbH
    Inventors: Thorsten Feiweier, Andreas Greiser, Uvo Hölscher, Thorsten Speckner, David Grodzki, Mathias Nittka, Daniel Nico Splitthoff
  • Publication number: 20190162804
    Abstract: A radio-frequency control system for a magnetic resonance tomography system and a method for the operation thereof are provided. The radio-frequency control system includes a controller and a radio-frequency power amplifier with amplification between a signal input and a signal output of the radio-frequency power amplifier that is dependent on a predetermined frequency response. The controller determines a control pulse for multislice excitation and outputs the pulse to the signal input of the radio-frequency power amplifier. The controller determines a high-frequency power value for the control pulse in dependence on the predetermined frequency response of the radio-frequency power amplifier.
    Type: Application
    Filed: November 29, 2018
    Publication date: May 30, 2019
    Inventors: Uvo Hölscher, Stephan Stöcker, Christian Wünsch
  • Publication number: 20180313922
    Abstract: A method for generating a spatially resolved magnetic resonance dataset using a coil arrangement includes providing at least one correction datum based on receiver characteristics of the coil arrangement. The method also includes providing a magnetic resonance dataset with spatially resolved signal intensity data, and correcting the at least one signal intensity datum in the magnetic resonance dataset by the correction datum before or after providing the magnetic resonance dataset.
    Type: Application
    Filed: April 28, 2018
    Publication date: November 1, 2018
    Inventors: Marc Beckmann, Petra Bildhauer, Carsten Großhauser, Hubertus Fischer, Uvo Hölscher, Ralf Kartäusch, Jürgen Nistler, Dominik Paul, Dieter Ritter, Volker Weißenberger
  • Publication number: 20180149724
    Abstract: The disclosure relates to a method for processing movement signals detected during a magnetic resonance scan of a patient, and to a corresponding magnetic resonance device and a computer program product. According to the method, RF pulses are generated by a RF transmitting unit of a magnetic resonance device in order to excite nuclear spins in the body of the patient. Magnetic resonance signals are generated by the excited nuclear spins. For spatial encoding of the magnetic resonance signals, gradient pulses are generated by a gradient coil unit of the magnetic resonance device. The magnetic resonance signals are detected by a RF receiving unit of the magnetic resonance device. Furthermore, movement signals of the patient are detected by a movement detection unit during detection of the magnetic resonance signals, and these are processed by a processing unit.
    Type: Application
    Filed: November 21, 2017
    Publication date: May 31, 2018
    Inventors: Ralf Kartäusch, Uvo Hölscher
  • Publication number: 20180147346
    Abstract: An infusion system for transporting fluid into a patient and a method for integrity monitoring of the system. The infusion system includes one or more sources of fluids to be infused, such as pumps or reservoirs, and a plurality of hose lines that carry the fluid to an entry point at the patient. A signal generator introduces a pressure signal into the fluid and a sensor, spaced some distance from the signal generator, receives the sensor signal and generates an input signal based on the sensor signal and transmits the input signal to an evaluation circuit. Information transmitted to the evaluation circuit is displayed visually, the information relating to operating status of fluid sources and lines, as well as to flow rates, blockages, leaks, etc.
    Type: Application
    Filed: May 17, 2017
    Publication date: May 31, 2018
    Inventors: David Grosse-Wentrup, Uvo Hölscher
  • Publication number: 20170205483
    Abstract: A method for setting a MRI sequence, a magnetic resonance device, and a computer program product are provided. The method includes providing, by a limitation unit, at least one limitation; providing, by a parameter provision unit, a plurality of parameters of the sequence, wherein at least one parameter of the plurality of parameters is assigned to a default parameter value; selecting, by a selection unit, a parameter of the plurality of parameters; determining, by a simulation unit, at least one sequential pattern based on at least one default parameter value of the default parameter values; determining, by an analysis unit, a permissible range of parameter values of the selected parameter based on at least one sequential pattern and the at least one limitation; and establishing, by an establishment unit, a new parameter value of the selected parameter within the permissible range of the parameter values.
    Type: Application
    Filed: January 16, 2017
    Publication date: July 20, 2017
    Inventors: Thorsten Feiweier, Andreas Greiser, Uvo Hölscher, Thorsten Speckner, David Grodzki, Mathias Nittka, Daniel Nico Splitthoff
  • Publication number: 20170143898
    Abstract: An infusion system (1) comprising one or more infusion sources (e.g. pumps and/or reservoirs (2, 3, 4, 9, 10)) and hose lines (5, 11) leading to a patient access (7, 12) for the infusion of a liquid, has a signal generator (A/S), which introduces a pressure signal or an acoustic signal into the liquid, and a sensor (S), which is arranged spaced apart from the signal generator in the infusion system, and an evaluation circuit, which is operatively connected to the sensor in such a way that a sensor signal output by the sensor produces an input signal of the evaluation circuit, said evaluation circuit being operatively connected to a display in such a way that information based on the sensor signals, about the infusion system, such as the flow rate of the liquid, can be displayed. The invention further discloses a method for integrity monitoring of such an infusion system.
    Type: Application
    Filed: March 27, 2015
    Publication date: May 25, 2017
    Inventors: David Grosse-Wentrup, Uvo Hölscher
  • Publication number: 20150245778
    Abstract: Disclosed herein is a framework for facilitating low power perfusion imaging. In accordance with one aspect, a gradient-modulated constant-adiabaticity radio frequency pulse sequence is generated. A labeling pulse from the pulse sequence is applied to a region of interest to label fluid supplying the region of interest and to acquire a tagged image. A control pulse from the pulse sequence may also be applied to the region of interest to acquire a control image. A perfusion image may then be generated using the tagged image and the control image.
    Type: Application
    Filed: March 2, 2015
    Publication date: September 3, 2015
    Inventors: Uvo Hölscher, Keith Heberlein, Ovidiu Andronesi
  • Patent number: 5647346
    Abstract: A medical apparatus 1 is equipped with: a metering device (2, 3) for a fluid medium (4, 5); a computer unit 19 controlling the metering device (2, 3) according to individual input quantities; a display screen 12 for displaying possible input quantities inside menu structures; a rotatable knob 13 for selecting an input quantity; a pressure-actuated acknowledgment switch 15 for assuming the selected input quantity as a setting value for one of the metering devices 2; and, a further switch 16. This medical apparatus facilitates the correction of incorrectly assumed input quantities. This is provided in that the further switch is configured as a pull switch or slide switch 16 activated by a rotatable knob 13. The pull or slide switch 16 transmits a signal (S1) which cancels the assumption of the input quantity. The signal S1 is transmitted to the computer unit 19 or to the metering device 2 or to both.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: July 15, 1997
    Assignee: Dragerwerk AG
    Inventor: Uvo Holscher
  • Patent number: 5507412
    Abstract: A multichannel metering system, for metering preselected fluid flows from individual fluid flow sources, includes a control device, and data fields which are located in the control device (memory) and describe at least the metering of the individual fluid flows, and can be polled to an operating surface connected to the control device with a data input circuit and with a data output circuit. The data field associated with a fluid flow source can be selected in a simple manner using selector switches associated as part of the data input circuit with individual fluid flow sources by which selector switches at least segments of the fluid flow source belonging to the fluid flow source selected can be represented on the operating surface. At least part of the data input circuit are switched into functional connection with the data field belonging to the fluid flow source selected.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: April 16, 1996
    Assignee: Dragerwerk AG
    Inventors: Holger Ebert, Bernt Klinger, Matthias Heimermann, Uvo Holscher
  • Patent number: 5335652
    Abstract: A gas ratio control device for anesthetic apparatus with an anesthetic gas feed line 1, which has a control valve 12 and a first measuring resistance 6, and an oxygen feed line 2 with a second measuring resistance 10, wherein the differential pressure determined from the measuring resistances is sent to a proportional member 13 for regulating oxygen feed to anesthetic gas feed. So oxygen concentration will not drop below a minimum oxygen concentration value in the case of anesthetics to be metered at both low and high doses, one of the measuring resistances 6, 10 can be replaced or bridged over with a bypass line 14, which contains a throttle point 15 (FIG. 1).
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: August 9, 1994
    Assignee: Dragerwerk Aktiengesellschaft
    Inventors: Wolfgang Falb, Karl-Ludwig Gippert, Ulrich Heim, Uvo Holscher, Siegfried Kiske, Gotz Kullik, Ralf-Ernst Loser, Christoph Maurer
  • Patent number: 5287898
    Abstract: A filling device for anesthetic vaporizers, with a connection piece which can be connected to a connection opening of an anesthetic reservoir in a gas-tight and liquid-tight manner. Leakage of anesthetic gas or liquid anesthetic can be avoided during the filling especially of low-boiling anesthetics by providing the reservoir 10 with a seal 17, which closes the connection opening 9 at least in a liquid-tight manner and can be opened by a projection 5 which is arranged on the connection piece 2 and extends into the interior space of the connection opening 9, as soon as the connection piece 2 is sealed off from the surroundings against the connection opening 9 by a sealing element 15 in a gas-tight and liquid-tight manner.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: February 22, 1994
    Assignee: Dragerwerk Aktiengesellschaft
    Inventors: Wolfgang Falb, Karl-Ludwig Gippert, Ulrich Heim, Uvo Holscher, Siegfried Kiske, Gotz Kullik, Ralf-Ernst Loser, Christoph Maurer
  • Patent number: 5253640
    Abstract: A process for calibrating a flow sensor in a respiratory system, with final control elements arranged in the respiratory system for influencing the respiration gas stream, is to be improved in terms of the influence of the qualitative gas composition of the respiration gas. To accomplish the task, the final control elements 4, 11 are switched, for calibration, over to a closed respiratory system with directed respiration gas stream. The drive unit 13 feeds the respiration gas present in the respiratory system through the flow sensor 9 according to a predetermined time-volume relationship. A calibration value for the flow sensor 9 is formed by comparison of the time-volume relationship with the measured signal of the flow sensor 9.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: October 19, 1993
    Assignee: Dragerwerk Aktiengesellschaft
    Inventors: Wolfgang Falb, Karl-Ludwig Gippert, Ulrich Heim, Uvo Holscher, Siegfried Kiske, Gotz Kullik, Ralf-Ernst Loser, Christoph Mauer
  • Patent number: 5243973
    Abstract: A metering device for a liquid anesthetic that is fed from a reservoir via a supply line into a heatable intermediate container maintained under pressure, from which gaseous anesthetic is fed via a metering valve into a fresh gas line. Accurate metering, which can be better monitored, is provided for low-boiling anesthetics. A supply unit 7 is mounted in the supply line 5, and liquid anesthetic is transported by the supply unit 7 into the intermediate container 6 until it is filled up to a predetermined filling level. A heating device 12 stabilizes the temperature of the liquid bath and ensures a sufficiently high vapor pressure of the gaseous anesthetic above the liquid phase. The anesthetic vapor is sent via the metering valve into the fresh gas line.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: September 14, 1993
    Assignee: Dragerwerk Aktiengesellschaft
    Inventors: Wolfgang Falb, Karl-Ludwig Gippert, Ulrich Heim, Uvo Holscher, Siegfried Kiske, Gotz Kullik, Ralf-Ernst Loser, Christoph Maurer
  • Patent number: 5242403
    Abstract: A metering pump for metering low-boiling liquids, especially liquid anesthetics provides continuous metering of liquid. To achieve this, the pump chamber 7 is maintained at a temperature below the boiling point of the liquid by means of a cooling device 14, preferably a Peltier cell.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: September 7, 1993
    Assignee: Dragerwerk Aktiengesellschaft
    Inventors: Wolfgang Falb, Karl-Ludwig Gippert, Ulrich Heim, Uvo Holscher, Siegfried Kiske, Gotz Kullik, Ralf-Ernst Loser, Christoph Maurer
  • Patent number: 5235971
    Abstract: An anesthetic metering device is provided with a temperature-stabilized anesthetic vapor source, from which anesthetic vapor 14 is metered into a carrier gas stream via a delivery line 8 with a metering valve 11 that can be controlled by a control unit 6. The arrangement is provided so that uncontrolled evaporation of anesthetic is prevented. To accomplish this task, the anesthetic vapor source is designed as a vaporizer chamber 2 filled with liquid anesthetic 3, and a gas delivery element 9 generating the metering pressure P.sub.I is present in front of the metering valve 11.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: August 17, 1993
    Assignee: Dragerwerk Aktiengesellschaft
    Inventors: Wolfgang Falb, Karl-Ludwig Gippert, Ulrich Heim, Uvo Holscher, Siegfried Kiske, Gotz Kullik, Ralf-Ernst Loser, Christoph Maurer
  • Patent number: 5197462
    Abstract: An anesthetic metering device with a bypass stream 5 passed from a gas inlet opening 2 via a bypass valve 3 to a gas discharge opening 4 and with a vaporizer chamber stream 7 flowing from a vaporizer chamber 6 via an adjusting device. Accurate metering is possible even in the case of anesthetics with low boiling points by manufacturing the vaporizer chamber 6 at least at the saturation vapor pressure of the anesthetic 22. The adjusting device includes a differential pressure transducer 9 connected on both sides of the bypass valve 3 and a metering valve 10, wherein the metering valve 10 is actuated by the output quantity 11 of the differential pressure transducer 9 via a proportional member 12 so that the concentration is adjusted via the variable transmission ratio of the proportional member 12.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: March 30, 1993
    Assignee: Dragerwerk Aktiengesellschaft
    Inventors: Wolfgang Falb, Karl-Ludwig Gippert, Ulrich Heim, Uvo Holscher, Siegfried Kiske, Gotz Kullik, Ralf-Ernst Loser, Christoph Maurer
  • Patent number: 5168867
    Abstract: A locking device 5 for a metering device 3 of an anesthetic vaporizer 1 with an unlocking device 6 for actuating the metering device 3 is provided so as to ensure blocking of the unlocking device 6 in operating states that are unsuitable for the operation of the anesthetic vaporizer 1. The locking device 5 is provided having a final control element 20, 24, 29 that covers a regulating distance that depends on a parameter influencing the operating state of the anesthetic vaporizer 1. This regulating distance of the final control element is transmitted to a blocking device 13 which blocks the unlocking device 6 if the values of the parameter are unsuitable for the operation of the anesthetic vaporizer 1.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: December 8, 1992
    Assignee: Dragerwerk Aktiengesellschaft
    Inventors: Wolfgang Falb, Karl-Ludwig Gippert, Ulrich Heim, Uvo Holscher, Siegfried Kiske, Gotz Kullik, Ralf-Ernst Loser, Christoph Maurer