Patents by Inventor Ralf Loeffler

Ralf Loeffler 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: 20160148734
    Abstract: The invention relates to a magnetic material which contains at least one transition metal (TM), at least one rare earth metal (RE), and titanium. The content of the transition metal equals 74 to 94 at %, the content of the rare earth metal equals 2 to 20 at %, and the content of titanium equals 7 to 9 at %, in each case based on the total mass of the magnetic material, and the transition metal comprises cobalt.
    Type: Application
    Filed: June 10, 2014
    Publication date: May 26, 2016
    Inventors: Roman Karimi, Roland Stein, Lars Bommer, Friederike Koeppen, Dagmar Goll, Juergen Oberle, Arne Huber, Gerhard Schneider, Ralf Loeffler
  • Patent number: 7821262
    Abstract: In a method as well as a magnetic resonance tomography apparatus for implementation of such a method for improved sensitivity-encoded magnetic resonance imaging using a two-dimensional or three-dimensional acquisition coil array, two-dimensional or three-dimensional undersampling of k-space is undertaken by measurement of a number N of basic partial trajectories ?n in k-space that in their entirety form a geometric arrangement of source points, a number M of different operators Cm(? km) are determined, with each operator representing an algebraic transformation with which unmeasured target points at an interval ? km from one of the measured source points are synthesized from a number of measured source points, the operators Cm(? km) are applied to at least one subset of the measured source points for at least partial completion of the magnetic resonance data set, and a largely artifact-free image is reconstructed in three-dimensional space on the basis of the measured source points and the synthesized data po
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: October 26, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stephan Kannengiesser, Ralf Loeffler, Edgar Mueller, Peter Schmitt
  • Publication number: 20080139919
    Abstract: In a method as well as a magnetic resonance tomography apparatus for implementation of such a method for improved sensitivity-encoded magnetic resonance imaging using a two-dimensional or three-dimensional acquisition coil array, two-dimensional or three-dimensional undersampling of k-space is undertaken by measurement of a number N of basic partial trajectories ?n in k-space that in their entirety form a geometric arrangement of source points, a number M of different operators Cm(? km) are determined, with each operator representing an algebraic transformation with which unmeasured target points at an interval ? km from one of the measured source points are synthesized from a number of measured source points, the operators Cm(? km) are applied to at least one subset of the measured source points for at least partial completion of the magnetic resonance data set, and a largely artifact-free image is reconstructed in three-dimensional space on the basis of the measured source points and the synthesized data po
    Type: Application
    Filed: May 25, 2007
    Publication date: June 12, 2008
    Inventors: Stephan Kannengiesser, Ralf Loeffler, Edgar Mueller, Peter Schmitt
  • Publication number: 20070269287
    Abstract: A wood and plastic screw has an essentially cylindrical shank, a tip, and a thread extending along the shank as far as into a tip region. The thread comprises a tip-side and a head-side flank, with a head-side flank angle being larger than a tip-side flank angle. The tip-side flank angle remains approximately constant in a shank region and in the tip region whereas the head-side flank angle in the tip region is larger than that in the shank region.
    Type: Application
    Filed: April 21, 2006
    Publication date: November 22, 2007
    Inventors: Erich Runge, Ralf Loeffler
  • Publication number: 20050245812
    Abstract: A method of magnetic resonance imaging of anatomy that is subject to a movement cycle (e.g., the heart during a cardiac cycle), comprising: administering a magnetic resonance contrast agent; waiting a period of time until the contrast agent is effective to cause selected portions of the anatomy (e.g.
    Type: Application
    Filed: April 29, 2004
    Publication date: November 3, 2005
    Inventors: Jae Kim, Kevin Chen, Arthur Stillman, Ralf Loeffler, Randolph Setser, Richard White
  • Patent number: 6750650
    Abstract: In a magnetic resonance tomography apparatus and a method for the operation thereof the acquisition of pure fat and water images is enabled, taking the basic field inhomogeneities into consideration, by utilizing the data that are obtained about the relevant measurement volume by means of a conventional 3D field measurement for the correction of the residual phase offset of the imaging data. The imaging data are preferably acquired on the basis of the 2-point Dixon method.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: June 15, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Berthold Kiefer, Ralf Loeffler
  • Publication number: 20030080737
    Abstract: In a method for generating image data by means of magnetic resonance radio-frequency excitation pulses and magnetic gradient pulses are emitted into an imaging region for generating location-coded magnetic resonance signals, which are received with an antenna for filling a k-space dataset that is divided into a low-frequency region and a higher-frequency region of k-space rows. The k-space rows are more densely arranged in the low-frequency region than in the higher-frequency region. The higher-frequency region is filled with synthetic k-space rows in post-processing such that the row density in the filled, higher-frequency region is the same as the row density in the low-frequency region. Image data of the imaging region are generated from the k-space dataset with the low-frequency region and the filled higher-frequency region using a Fourier transformation.
    Type: Application
    Filed: September 27, 2002
    Publication date: May 1, 2003
    Inventor: Ralf Loeffler
  • Publication number: 20030062900
    Abstract: In a magnetic resonance tomography apparatus and a method for the operation thereof the acquisition of pure fat and water images is enabled, taking the basic field inhomogeneities into consideration, by utilizing the data that are obtained about the relevant measurement volume by means of a conventional 3D field measurement for the correction of the noise phase of the imaging data. The imaging data are preferably acquired on the basis of the 2-point Dixon method.
    Type: Application
    Filed: July 2, 2002
    Publication date: April 3, 2003
    Inventors: Berthold Kiefer, Ralf Loeffler
  • Patent number: 6280384
    Abstract: In a method for spatially resolved temperature monitoring in an examination subject, a suspension of ferromagnetic microparticles is intracorporeally introduced into the body Curie temperature of which substance corresponds to a desired temperature limit value. By means of an MR measurement, a spatially resolved representation of the body is obtained with artifacts that are caused by the substance being in the ferromagnetic state being employed as a criterion for determining that the temperature limit value has not yet been reached.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: August 28, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ralf Loeffler