Patents by Inventor Karl Schwarz
Karl Schwarz 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).
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Publication number: 20240131751Abstract: A method and a device for the production of polyamide 6 pellets wherein an intermediate drying is not necessary and a combined pelletizing and extraction take place. Depending on the intended use, the pellets may directly be used or subjected to further treatment steps. A device for the production of polyamide 6 pellets includes a melt device for providing a melt of polyamide 6, an underwater pelletizing system which is operable under increased pressure, and a vertical vessel having a cylindrical section and a tapered bottom section. The tapered bottom section is provided with a cooling device and is connected to a pipe comprising a screw and/or a rotary gate valve for conveying pellets. The device includes a circuit for circulating an aqueous solution of ? caprolactam through the underwater pelletizing system and the vertical vessel.Type: ApplicationFiled: February 15, 2021Publication date: April 25, 2024Inventors: Stefan Deiß, Raimund Schwarz, Karl-Heinz Heldmann, Martin Baumert, Eva-Maria Kamp
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Patent number: 9299140Abstract: A method, a computation unit and a CT system are disclosed for reconstructing CT image data, which includes a plurality of image voxels, by way of a weighted filtered back-projection. To weight the projection data during the filtered back-projection, a weight function is used, which weights the projection data from central beams which strike a detector row relatively close to the edge of the row relatively less, and which weights the projection data of central beams, which strike a detector row more relatively centrally, relatively more.Type: GrantFiled: August 22, 2013Date of Patent: March 29, 2016Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Karl Schwarz, Johan Sunnegardh
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Patent number: 8718343Abstract: A method is disclosed for reconstructing image data of an examination object from measured data, wherein the measured data was captured previously during a relative rotary motion between a radiation source of a computed tomography system and the examination object. In at least one embodiment, the measured data is modified to achieve a particular grayscale characteristic of the image data to be reconstructed. The image data is calculated by way of an iterative algorithm using the modified measured data, wherein no arithmetic step for reducing noise is employed in the iterations.Type: GrantFiled: May 19, 2011Date of Patent: May 6, 2014Assignee: Siemens AktiengesellschaftInventors: Herbert Bruder, Martin Petersilka, Rainer Raupach, Karl Schwarz
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Publication number: 20140086466Abstract: A method, a computation unit and a CT system are disclosed for reconstructing CT image data, which includes a plurality of image voxels, by way of a weighted filtered back-projection. To weight the projection data during the filtered back-projection, a weight function is used, which weights the projection data from central beams which strike a detector row relatively close to the edge of the row relatively less, and which weights the projection data of central beams, which strike a detector row more relatively centrally, relatively more.Type: ApplicationFiled: August 22, 2013Publication date: March 27, 2014Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Karl SCHWARZ, Johan SUNNEGARDH
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Publication number: 20110293160Abstract: A method is disclosed for reconstructing image data of an examination object from measured data, wherein the measured data was captured previously during a relative rotary motion between a radiation source of a computed tomography system and the examination object. In at least one embodiment, the measured data is modified to achieve a particular grayscale characteristic of the image data to be reconstructed. The image data is calculated by way of an iterative algorithm using the modified measured data, wherein no arithmetic step for reducing noise is employed in the iterations.Type: ApplicationFiled: May 19, 2011Publication date: December 1, 2011Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Herbert Bruder, Martin Petersilka, Rainer Raupach, Karl Schwarz
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Patent number: 8000433Abstract: A method is for image reconstruction for computed tomography with a non-one-dimensional, extended detector. The rays of the detector are weighted during the backprojection as a function of their position in the beam.Type: GrantFiled: September 23, 2003Date of Patent: August 16, 2011Assignee: Siemens AktiengesellschaftInventors: Herbert Bruder, Thomas Flohr, Annabella Rauscher, Karl Schwarz, Karl Stierstorfer
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Patent number: 7978810Abstract: An imaging method is disclosed for variable pitch spiral CT. In at least one embodiment, the method includes spiral scanning of an examination object lying on a patient table, with the aid of a beam emanating from at least one focus, and the aid of a detector arrangement of planar design lying opposite the focus, the detector arrangement supplying output data that represent the attenuation of the beams during passage through the examination object; filtering the output data; weighted back projection of the filtered output data; and visualizing a layer or a volume on a display unit on the basis of the back projected output data. In at least one embodiment, a non constant pitch of the spiral scanning is taken into account computationally during the back projection. In at least one embodiment, a CT machine is disclosed for carrying out the above named method.Type: GrantFiled: May 2, 2008Date of Patent: July 12, 2011Assignee: Siemens AktiengesellschaftInventors: Karl Schwarz, Karl Stierstorfer
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Patent number: 7711081Abstract: A method is disclosed for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources. A first ray cone with a relatively larger fan angle and a second ray cone with a relatively smaller fan angle scan an object circularly or spirally. The first ray cone generates a first dataset A and the second ray cone generates a dataset B. The dataset B of the smaller ray cone is supplemented with other data at the edge to give an expanded dataset B+ for reconstruction of the CT representation. The expanded dataset B+ of the second, smaller ray cone and the dataset A of the first, larger ray cone is subjected to a convolution operation to give datasets B+? and A?. Finally, a back projection to reconstruct sectional images or volume data is respectively carried out from the convoluted datasets B+? and A?. The dataset B is supplemented with data of the dataset A and supplementary data are removed from the dataset B+? after the convolution but before the back projection.Type: GrantFiled: July 25, 2006Date of Patent: May 4, 2010Assignee: Siemens AktiengesellschaftInventors: Herbert Bruder, Thomas Flohr, Karl Schwarz, Karl Stierstorfer
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Publication number: 20080285709Abstract: An imaging method is disclosed for variable pitch spiral CT. In at least one embodiment, the method includes spiral scanning of an examination object lying on a patient table, with the aid of a beam emanating from at least one focus, and the aid of a detector arrangement of planar design lying opposite the focus, the detector arrangement supplying output data that represent the attenuation of the beams during passage through the examination object; filtering the output data; weighted back projection of the filtered output data; and visualizing a layer or a volume on a display unit on the basis of the back projected output data. In at least one embodiment, a non constant pitch of the spiral scanning is taken into account computationally during the back projection. In at least one embodiment, a CT machine is disclosed for carrying out the above named method.Type: ApplicationFiled: May 2, 2008Publication date: November 20, 2008Inventors: Karl Schwarz, Karl Stierstorfer
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Patent number: 7200680Abstract: The present invention provides a method, apparatus and system for providing multimedia messages to incompatible terminals. The apparatus includes a notification module (216), a media converter (220) and a retrieval module (218). The notification module (216) notifies the incompatible terminal (210) that the multimedia message (222) is available. The media converter (220) transcodes one or more parts of the multimedia message (222). The retrieval module (218) is communicably coupled to the media converter (220) and retrieves the multimedia message (222) in response to a delivery request (232, 234) from the incompatible terminal (210), renders the multimedia message (222), using the media converter (220) as necessary, into a message that is compatible with the incompatible terminal (210) and sends the message to the incompatible terminal (210). This method can be implemented using a computer program embodied on a computer readable medium wherein each function is executed using a code segment.Type: GrantFiled: March 11, 2002Date of Patent: April 3, 2007Assignee: Ericsson Inc.Inventors: John P. Evans, David Oren, Karl Schwarz, Peter L. Squillante
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Publication number: 20070025499Abstract: A method is disclosed for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources. A first ray cone with a relatively larger fan angle and a second ray cone with a relatively smaller fan angle scan an object circularly or spirally. The first ray cone generates a first dataset A and the second ray cone generates a dataset B. The dataset B of the smaller ray cone is supplemented with other data at the edge to give an expanded dataset B+ for reconstruction of the CT representation. The expanded dataset B+ of the second, smaller ray cone and the dataset A of the first, larger ray cone is subjected to a convolution operation to give datasets B+? and A?. Finally, a back projection to reconstruct sectional images or volume data is respectively carried out from the convoluted datasets B+? and A?. The dataset B is supplemented with data of the dataset A and supplementary data are removed from the dataset B+? after the convolution but before the back projection.Type: ApplicationFiled: July 25, 2006Publication date: February 1, 2007Inventors: Herbert Bruder, Thomas Flohr, Karl Schwarz, Karl Stierstorfer
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Publication number: 20040114707Abstract: A method is for image reconstruction for computed tomography with a non-one-dimensional, extended detector. The rays of the detector are weighted during the backprojection as a function of their position in the beam.Type: ApplicationFiled: September 23, 2003Publication date: June 17, 2004Inventors: Herbert Bruder, Thomas Flohr, Annabella Rauscher, Karl Schwarz, Karl Stierstorfer
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Patent number: 6651018Abstract: In a method for correcting a calibration table T(n,k) of a CT apparatus that contains calibration values, the CT apparatus having a detector system with N≧2 rows of detector elements following one another in the z-direction that include a first active row of detector elements in the z-direction and a last active row of detector elements in the z-direction, for correcting the calibration values of the aforementioned first and last active rows of detector elements, a reference vector R(k) is produced, the error is determined with respect to the first and last active rows of detector elements, and the error F(n,k) of the first and last active rows of detector elements is subtracted from the corresponding calibration values of the calibration table T(n,k) for determining corrected calibration values Tcor(n,k) with respect to the first and last active rows of detector elements.Type: GrantFiled: March 5, 2002Date of Patent: November 18, 2003Assignee: Siemens AktiengesellschaftInventors: Helmut Kropfeld, Karl Schwarz
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Publication number: 20030172121Abstract: The present invention provides a method, apparatus and system for providing multimedia messages to incompatible terminals. The apparatus includes a notification module (216), a media converter (220) and a retrieval module (218). The notification module (216) notifies the incompatible terminal (210) that the multimedia message (222) is available. The media converter (220) transcodes one or more parts of the multimedia message (222). The retrieval module (218) is communicably coupled to the media converter (220) and retrieves the multimedia message (222) in response to a delivery request (232, 234) from the incompatible terminal (210), renders the multimedia message (222), using the media converter (220) as necessary, into a message that is compatible with the incompatible terminal (210) and sends the message to the incompatible terminal (210). This method can be implemented using a computer program embodied on a computer readable medium wherein each function is executed using a code segment.Type: ApplicationFiled: March 11, 2002Publication date: September 11, 2003Inventors: John P. Evans, David Oren, Karl Schwarz, Peter L. Squillante
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Publication number: 20020165686Abstract: In a method for correcting a calibration table T(n,k) of a CT apparatus that contains calibration values, the CT apparatus having a detector system with N≧2 rows of detector elements following one another in the z-direction that include a first active row of detector elements in the z-direction and a last active row of detector elements in the z-direction, for correcting the calibration values of the aforementioned first and last active rows of detector elements, a reference vector R(k) is produced, the error is determined with respect to the first and last active rows of detector elements, and the error F(n,k) of the first and last active rows of detector elements is subtracted from the corresponding calibration values of the calibration table T(n,k) for determining corrected calibration values Tcor(n,k) with respect to the first and last active rows of detector elements.Type: ApplicationFiled: March 5, 2002Publication date: November 7, 2002Applicant: Siemens AktiengesellschaftInventors: Helmut Kropfeld, Karl Schwarz
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Patent number: 6400791Abstract: In a computed tomography (CT) device for generating tomograms of slices of an examination object, which are inclined relative to the longitudinal axis of a patient support plate that is provided for an examination subject, the gantry of the CT device and the support plate can be tilted relative to one another and in the tilted state, the support plate and the gantry can be linearly adjusted relative to one another substantially in the direction of the system axis of the CT device for generating a relative movement between the gantry and the support plate.Type: GrantFiled: June 2, 2000Date of Patent: June 4, 2002Assignee: Siemens AktiengesellschaftInventor: Karl Schwarz
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Patent number: 6307909Abstract: In a method for image reconstruction in a computed tomography (CT) device, which picks up projections of a region located in a measuring field of an examination subject having an extent which exceeds this measuring field, the projections are identified in which the measuring field was exceeded, and extrapolated measurement points representing the detected cut-off projections, are added to the series of “actual” measurement points in such a way that each series of measurement points representing a detected projection is completed in an optimally realistic manner, and begins and ends with a measurement point whose measurement value is substantially zero.Type: GrantFiled: November 29, 1999Date of Patent: October 23, 2001Assignee: Siemens AktiengesellschaftInventors: Thomas Flohr, Bernd Ohnesorge, Karl Schwarz
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Patent number: 5943434Abstract: In a method for image reconstruction in imaging technology for the implementation of a fast convolution with the transformation length M while allowing slight over-convolution errors, each of p or 2p out of n measured projections of the length N are convolved with a modified filter kernel h (k) using Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) simultaneously in one step.Type: GrantFiled: June 30, 1997Date of Patent: August 24, 1999Assignee: Siemens AktiengesellschaftInventor: Karl Schwarz
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Patent number: 5334136Abstract: A system for reducing post-cardiopulmonary bypass encephalopathy due to microembolization of the brain of a patient with gaseous microbubbles (less than 40 microns in diameter) occurring during open-heart surgery using a cardiopulmonary bypass machine by passing a stream of blood from the patient through an ultrasonic traveling wave which propagates across the stream without reflection and sweeps the blood clean of the microbubbles without inducing blood cell trauma. The blood passes through a chamber between an input port and a filtrate exit port. An ultrasonic beam is projected so that a pressure maximum of the main lobe of the beam is centered at the filtrate exit port. The microbubbles are carried by the traveling wave to a waste exit port in the chamber downstream of the input port.Type: GrantFiled: January 19, 1990Date of Patent: August 2, 1994Inventors: Karl Schwarz, Richard S. Meltzer, Charles C. Church
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Patent number: 5200886Abstract: It is intended to improve especially a switched-mode power supply operating in accordance with the flyback converter principle, in such a manner that it has a characteristic during the run-up phase which is easier on the components compared with previously. To keep the regulating voltage of the regulating circuit (Rk) of the switched-mode power supply constant during the run-up phase, a differentiating capacitor (Cd) is connected in parallel with a diode circuit (D1) in one case and between the cathode terminals of two diode circuits (D1 and D2) in the other case. Keeping the regulating voltage constant results in a uniformly linear running-up of the switched-mode power supply output voltage (Ua), as a result of which lastly the loading on various components is also reduced.Type: GrantFiled: March 10, 1992Date of Patent: April 6, 1993Assignee: Siemens Nixdorf Informationssysteme AktiengesellschaftInventors: Karl Schwarz, Horst Bartussek, Helmut Rettenmaier