Patents by Inventor Stefan Böhm

Stefan Böhm 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).

  • Method for operating an x-ray diagnostic apparatus for determining quality values
    Patent number: 7826651
    Abstract: A method for checking an x-ray diagnostic apparatus is provided. Fluoroscopic series of x-ray images of a technical phantom are digitally acquired and stored. Difference between a dynamic image and a background image is calculated. A measuring field is predicted. Priori information about the shape of a clinically relevant object is determined. Hough transformation on a gray value image corresponding to the difference is applied. Contrast of the object from the Hough-transformed gray value image is determined. A square of the determined contrast is calculated. A noise variance is calculated by determining a sum of a noise variance of a homogenous image region and a variance of the background image. A contrast-to-noise ratio of the determined contrast and the calculated noise variance is determined. A square of the contrast-to-noise ratio is dynamically averaged. A Clinical Relevant Fluoroscopy Performance index for the x-ray diagnostic apparatus is determined.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: November 2, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Böhm, Peter Durlak, Volker Heer, Martin Kolarjk
  • Method for producing ?-fluoromalonic acid dialkyl esters
    Patent number: 7807851
    Abstract: The invention relates to a new, advantageous method for the preparation of dialkyl ?-fluoromalonates.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: October 5, 2010
    Assignee: Bayer CropScience AG
    Inventors: Andreas Günther, Holger Weintritt, Stefan Böhm
  • System and method for detecting and tracking a guidewire in a fluoroscopic image sequence
    Patent number: 7792342
    Abstract: A system and method for populating a database with a set of image sequences of an object is disclosed. The database is used to detect localization of a guidewire in the object. A set of images of anatomical structures is received in which each image is annotated to show a guidewire, catheter, wire tip and stent. For each given image a Probabilistic Boosting Tree (PBT) is used to detect short line segments of constant length in the image. Two segment curves are constructed from the short line segments. A discriminative joint shape and appearance model is used to classify each two segment curve. A shape of an n-segment curve is constructed by concatenating all the two segment curves. A guidewire curve model is identified that includes a start point, end point and the n-segment curve. The guidewire curve model is stored in the database.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: September 7, 2010
    Assignees: Siemens Medical Solutions USA, Inc., Siemens Aktiengesellschaft
    Inventors: Adrian Barbu, Vassilis Athitsos, Bogdan Georgescu, Peter Durlak, Stefan Boehm, Dorin Comaniciu
  • Microsystem component and method for gluing microcomponents to a substrate
    Patent number: 7744718
    Abstract: A method for gluing microcomponents to a substrate (1) during the production of microsystem components includes the steps of applying a reactive or non-reactive hot melt type adhesive (5) to the microcomponent (18) and/or the substrate (1), heating the hot melt type adhesive (5), and placing the microcomponent (18) onto the substrate (1). The hot melt type adhesive (5) is on the contact surfaces between the microcomponent (18) and the substrate (1) during and after gluing.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: June 29, 2010
    Assignee: Technische Universitaet Braunschweig Carolo-Wilhelmina
    Inventors: Stefan Boehm, Klaus Dilger, Elisabeth Stammen, Frank Mund, Gero Pokar, Jan Wrege
  • SYSTEM AND METHOD FOR DECOMPOSED TEMPORAL FILTERING FOR X-RAY GUIDED INTERVENTION APPLICATION
    Publication number: 20100092061
    Abstract: A method for temporally filtering medical images during a fluoroscopy guided intervention procedure includes providing a mask image, a fluoroscopy intervention image acquired at a current time during a medical intervention procedure, forming a subtraction image by subtracting the mask image from the intervention image, calculating a motion image of a moving structure in the subtraction image, forming a residual image by subtracting the motion image from the subtraction image, temporally filtering the residual image with a filtered image from a previous time, and adding the motion image to the temporally filtered residual image.
    Type: Application
    Filed: October 1, 2009
    Publication date: April 15, 2010
    Applicant: Siemens Corporation
    Inventors: Yunqiang Chen, Ti-chiun Chang, Tong Fang, Sandra Knoth, Stefan Böhm, Peter Durlak
  • INDUCTION-ASSISTED PRODUCTION METHOD
    Publication number: 20090311506
    Abstract: In a production method for producing molded articles from fiber composites, superparamatic particles are selected which become coupled to an external alternating magnetic field. These superparamagnatic particles are added to a resin portion of a strip-shaped starting material further comprising reinforcing fibers. The strip-shaped starting material is then continuously advanced, and, while being advanced, heated by coupling-in an external alternating magnetic field to which the superparamagnatic particles in the resin portion become coupled. Next, the heated starting material is continuously molded into a molded article; and the resin portion in the molded particle is cured.
    Type: Application
    Filed: August 21, 2009
    Publication date: December 17, 2009
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Lars HERBECK, Thorsten MAHRHOLZ, Tobias STROEHLEIN, Juergen MOSCH, Michael FRAUENHOFER, Stefan BOEHM, Klaus DILGER, Harald HAEGER, Christian BARON, Markus PRIDOEHL
  • Method for providing variously processed image data and x-ray image system
    Publication number: 20090257637
    Abstract: Modern image processing systems for the postprocessing of X-ray images require a large number of input parameters and take a great deal of time. So that calculations do not need to be made sequentially for different sets of input parameters, parallel processors are used, in which the same image processing program is executed in each case, but with different input parameters in each case. A large number of processed X-ray images is thus obtained, which in particular can also be displayed simultaneously. From the multiple processed x-ray images, a repeated postprocessing of a processed x-ray image can take place by mixing.
    Type: Application
    Filed: September 20, 2007
    Publication date: October 15, 2009
    Inventors: Stefan Böhm, Klaus Finkler, Bernhard Geiger
  • PREPARATIONS FOR USE IN CONCRETE
    Publication number: 20090197993
    Abstract: The invention provides the use of mixtures based on aqueous dispersions of polychloroprene to produce fiber products finished therewith, a process for the production thereof and the use of these finished fiber products to produce textile-reinforced and fiber-reinforced concrete and other products based on cement.
    Type: Application
    Filed: April 3, 2007
    Publication date: August 6, 2009
    Inventors: Rüdiger Musch, Horst Stepanski, Klaus Dilger, Stefan Böhm, Frank Mund
  • X-ray diagnostic apparatus and method for operating an x-ray diagnostic apparatus for determining quality values
    Patent number: 7539336
    Abstract: The invention relates to an angiographic x-ray diagnostic apparatus with an x-ray radiator having an x-ray tube, with a patient positioning table having a radiation-transparent positioning plate and mattress, with an x-ray detector, with an imaging system, an image processing unit and a measuring device to which the output signals of the x-ray detector are fed and which has a first device for determining a value determining the reproduction quality of clinically relevant objects, a second device for determining local variances of the noise in a homogenous image region of different x-ray images and a device for taking the ratio of the output values of the two devices.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: May 26, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Böhm, Peter Durlak, Volker Heer, Martin Kolarjk
  • Method and system for human vision model guided medical image quality assessment
    Publication number: 20090116713
    Abstract: A method and system for image quality assessment is disclosed. The image quality assessment method is a no-reference method for objectively assessing the quality of medical images. This method is guided by the human vision model in order to accurately reflect human perception. A region of interest (ROI) of medical image is divided into non-overlapping blocks of equal size. Each of the blocks is categorized as a smooth block, a texture block, or an edge block. A perceptual sharpness measure, which is weighted by local contrast, is calculated for each of the edge blocks. A perceptual noise level measure, which is weighted by background luminance, is calculated for each of the smooth blocks. A sharpness quality index is determined based on the perceptual sharpness measures of all of the edge blocks, and a noise level quality index is determined based on the perceptual noise level measures of all of the smooth blocks.
    Type: Application
    Filed: October 3, 2008
    Publication date: May 7, 2009
    Inventors: Michelle Xiao-Hong Yan, Ti-Chiun Chang, Markus Lendl, Stefan Boehm, Tong Fang, Peter Durlak
  • Method and system for intelligent digital subtraction
    Publication number: 20090103682
    Abstract: A method and system for intelligent digital subtraction is disclosed. The method and system for intelligent digital subtraction can be used in a roadmap application for a coronary intervention. A mask image is obtained with vessels highlighted by contrast media. A guide wire is inserted into the vessels, and a guide wire image is obtained. A direct subtraction image is generated from the guide wire image and the mask image. A reduced noise subtraction image is generated based on mutual image information between the subtraction image and the guide wire image and mutual image information between the subtraction image and the mask image.
    Type: Application
    Filed: October 3, 2008
    Publication date: April 23, 2009
    Inventors: Yungiang Chen, Tong Fang, Sandra Martin, Stefan Boehm, Peter Durlak
  • Computer-assisted detection method for diaphragm edges caused in an image by a diaphragm
    Patent number: 7499575
    Abstract: In a computer-assisted method for detecting diaphragm edges caused in an image by a diaphragm, the image and information about an inner structure of the diaphragm are provided to a computer. The computer first detects all image edges that are present in the image. Using the information about the inner structure of the diaphragm, it then determines the diaphragm edges from among the detected image edges.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: March 3, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Böhm, Klaus Finkler
  • Method for controlling the dose or the dose rate when recording x-ray images
    Patent number: 7436930
    Abstract: With a method for controlling the dose or dose rate when recording x-ray images by means of a detector comprising image elements which record a plurality of dose data values, an actual value is determined for the dose or dose rate from the totality of the data values recorded by the image elements of a predetermined image segment, said actual value being compared with a predetermined target value in order to control the dose or dose rate when recording a further x-ray image. In accordance with the invention, the actual value is determined such that on the basis of a frequency distribution of the dose data values of the image elements assigned to the dominant, a p-quantile is determined, and that the dose data value assigned to the p-quantile is used to determine the actual value.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: October 14, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventors: Philipp Bernhardt, Stefan Böhm, Bernhard Geiger
  • Consistent set of interfaces derived from a business object model
    Publication number: 20080133303
    Abstract: A business object model, which reflects data that is used during a given business transaction, is utilized to generate interfaces. This business object model facilitates commercial transactions by providing consistent interfaces that are suitable for use across industries, across businesses, and across different departments within a business during a business transaction.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 5, 2008
    Inventors: Abhinava Singh, Andor Vizhanyo, Andreas Esau, Andreas Huber-Buschbeck, Andreas Seibel, Astrid Doppenschmidt, Bleickard Langendoerfer, Budi Santoso, Chandramohan Yengoti, Christian Hissler, Christian Werner, Christof Rausse, Cornel Leinenkugel, Devasena Rajamohan, Dietmar Henkes, Gabor Szigeti, Gerd Egen, Gerold Wellenhofer, Gergor Arlt, Hans-Peter Thienel, Heiko Theissen, Jens-Martin Wolle, Jerome Poulin, Kerstin Hambrecht, Klaus Zumbach, Madhavi Koujalagi, Mark Schuette, Moghaddam Masoumeh, Oliver Vonderheid, Ralf Wagenknecht, Rana Chakrabarti, Ravishankar Bijjala, Shiry Achiman, Siarhei Ulasenka, Stefan Boehm, Susanne Doenig, Svetlana Rebholz, Tamas Varga, Thiemo Lindemann, Thomas Schneider, Udo Herbst, Uwe Oehler, Rolf Waltemathe, Carsten Pluder, Harsh Panwar, Eberhard Schick, Corinne Reisert, Juergen Hollberg, Peter Wadewitz, Shankar V
  • System and Method For Detecting and Tracking A Guidewire In A Fluoroscopic Image Sequence
    Publication number: 20070270692
    Abstract: A system and method for populating a database with a set of image sequences of an object is disclosed. The database is used to detect localization of a guidewire in the object. A set of images of anatomical structures is received in which each image is annotated to show a guidewire, catheter, wire tip and stent. For each given image a Probabilistic Boosting Tree (PBT) is used to detect short line segments of constant length in the image. Two segment curves are constructed from the short line segments. A discriminative joint shape and appearance model is used to classify each two segment curve. A shape of an n-segment curve is constructed by concatenating all the two segment curves. A guidewire curve model is identified that includes a start point, end point and the n-segment curve. The guidewire curve model is stored in the database.
    Type: Application
    Filed: February 16, 2007
    Publication date: November 22, 2007
    Applicant: SIEMENS CORPORATE RESEARCH, INC.
    Inventors: Adrian Barbu, Vassilis Athitsos, Bogdan Georgescu, Stefan Boehm, Peter Durlak, Dorin Comaniciu
  • METHOD AND DEVICE FOR NON-CONTACTING MONITORING OF A FILLING STATE
    Publication number: 20070163671
    Abstract: In a method and a device for non-contacting monitoring of the fill state of liquids in an unpressurized liquid container, the fill state and/or the fill state change is determined by radiating light onto the boundary region of the liquid at which a fill state-dependent curvature arises due to adhesion forces of the liquid at the reservoir wall and surface tension, and the intensity of the reflected light or the reflection angle is measured at a predetermined location.
    Type: Application
    Filed: January 12, 2007
    Publication date: July 19, 2007
    Inventors: Stefan Boehm, Ludwig Danzer, Sven Rathmann, Jan Wrege
  • Image reconstruction method and computer program product
    Patent number: 7148903
    Abstract: In a method for reconstructing a three-dimensional subject a number of projections of a three-dimensional subject is acquired by an acquisition arrangement. Each projection is a dataset of spatially contiguous data values. The projections are provided to a computer. A first part of the data values of the projections is replaced by new data values, and a second part of the data values of the projections remains unchanged. Thus changed projections are generated, using which a reconstruction of an image of the subject is determined by the computer.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: December 12, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Brunner, Stefan Böhm, Joachim Hornegger, Christian Neumair
  • Microsystem component and method for gluing microcomponents to a substrate
    Publication number: 20060243380
    Abstract: A method for gluing microcomponents to a substrate (1) during the production of microsystem components includes the steps of applying a reactive or non-reactive hot melt type adhesive (5) to the microcomponent (18) and/or the substrate (1), heating the hot melt type adhesive (5), and placing the microcomponent (18) onto the substrate (1). The hot melt type adhesive (5) is on the contact surfaces between the microcomponent (18) and the substrate (1) during and after gluing.
    Type: Application
    Filed: August 6, 2004
    Publication date: November 2, 2006
    Inventors: Stefan Boehm, Klaus Dilger, Elisabeth Stammen, Frank Mund, Gero Pokar, Jan Wrege
  • Method for operating an image system of an imaging medical examination device and medical examination device
    Patent number: 6763084
    Abstract: In a method for operating an imaging medical examination device (1), an event of the undisturbed operation of the medical examination device (1) automatically triggers a defect determination (63) for determining a defective pixel possibly present in the image. The event is derived for example from a switch-on process, a calibration process and/or an examination process. Preferably, after the defect determination (63), a correction process (67) is automatically triggered if a defective pixel was detected. A medical examination device (1) has a detection device (31) for automatically determining a defective pixel possibly present in the image, in which case the detection device (31) can be activated by an event of the undisturbed operation of the medical examination device. A correction device (41) for automatically eliminating a defective pixel that has possibly been detected is preferably present.
    Type: Grant
    Filed: November 23, 2001
    Date of Patent: July 13, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Boehm, Martin Spahn
  • Method and X-ray diagnostic installation for correction of comet artifacts
    Patent number: 6655836
    Abstract: In an X-ray diagnostic installation and correction method wherein comet artifacts in the unprocessed image can be corrected, a geometrical analysis of the comet artifacts is implemented, an estimated reference value is determined from the original signal using the analysis result, an estimated detail signal is determined from the original signal using the analysis result, and the comet artifacts are corrected on the basis of the estimated reference value and the estimated detail signal.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: December 2, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Boehm, Martin Spahn, Boris Stowasser