Patents by Inventor Stefan Assmann

Stefan Assmann 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: 7336072
    Abstract: In a method for representation of flow in a magnetic resonance image, a first magnetic resonance image of an examination subject is acquired, wherein the flow occurring in the examination subject is not compensated in a first spatial direction; a second magnetic resonance image is acquired, wherein the flow occurring in the first spatial direction is compensated, the phase of the magnetization in each of the first and the second magnetic resonance images is calculated of the phase difference between the first phase image and the second phase image, which is calculated is a measure for the flow along the first spatial direction. A third magnetic resonance image is acquired, wherein the flow in a second spatial direction perpendicular to the first spatial direction is not compensated, and a fourth magnetic resonance image is acquired, wherein the flow occurring in the second spatial direction is compensated.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: February 26, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Assmann, Oliver Schreck
  • Publication number: 20080037850
    Abstract: In a method for generation of a medical image, starting from an acquired data set of an organ to be depicted, a magnification factor and/or an image section to be depicted are automatically determined dependent on the organ to be depicted. Based on this a medical image is generated from the data set. A data processing unit for medical images is fashioned for implementation of such a method and computer software implements such a method when it is executed on a data processing unit.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 14, 2008
    Inventors: Stefan Assmann, Okan Ekinci
  • Patent number: 7328056
    Abstract: In a method and apparatus for classifying plaque in a blood vessel of a living subject using magnetic resonance imaging, a first magnetic resonance image is produced with a first intensity distribution of a cross-section of a vessel containing plaque, and a contrast agent is injected into the vascular system and a second magnetic resonance image of the cross-section of the vessel is produced with a second intensity distribution after a first time duration following the contrast agent injection, and a third magnetic resonance image of the cross-section of the vessel is produced with a third intensity distribution after a second time duration following the injection of the contrast agent, and the plaque is classified dependent on the respective intensity distributions of the magnetic resonance images.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: February 5, 2008
    Assignees: Siemens Aktiengesellschaft, Northwestern University
    Inventors: Stefan Assmann, Oliver Schreck, Paul Finn, Stephanie Shors
  • Patent number: 7317940
    Abstract: In a method for automatic determination of the actual speed interval of a flowing medium in flow measurements in magnetic resonance imaging, an overview image (localizer) is acquired displayed on a screen, a scout flow measurement is performed by acquiring an image series during a motion cycle at a pre-determined speed interval in a tissue-area to be measured, the peak speed of the medium in the tissue area to be measured is determined on the basis of the scout flow measurement, an optimized flow measurement is performed by acquiring the same images from the acquired image series on the basis of the determined peak speed, and the speed-resolved tissue area obtained by means of the optimized flow measurement is displayed on the screen.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: January 8, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stefan Assmann
  • Publication number: 20070047791
    Abstract: In a method and magnetic resonance tomography apparatus for evaluation of a cinematographic image series of the heart during a heart cycle, wherein the image series is acquired with an acquisition unit, and in the image series healthy heart muscle tissue is presented as differentiable from damaged heart muscle tissue, at least two individual images of the image series are processed in a data processing unit, with at least one region of the healthy heart muscle and/or of the damaged heart muscle being detected in each of the individual images by a pattern recognition algorithm, and at least one descriptive quantity is measured that describes a geometric property of the region that has been detected by the pattern recognition algorithm, a dynamic change of the descriptive quantity is detected, and medically-relevant information that is acquired from the dynamic change of the descriptive quantity is made available as an output.
    Type: Application
    Filed: August 15, 2006
    Publication date: March 1, 2007
    Inventors: Stefan Assmann, Renate Jerecic
  • Patent number: 7145334
    Abstract: In a method and MR apparatus for the automatic segmentation of flow images acquired by magnetic resonance tomography for the depiction of tissue or organs traversed with fluid such as blood, at least one phase image of a selected region of the subject is acquired by magnetic resonance tomography, and fluid-traversed regions in the at least one phase image are automatically segmented.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: December 5, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Assmann, Martin Requardt, Ingo Schmitjans, Oliver Schreck
  • Publication number: 20060241389
    Abstract: In a method for representation of flow in a magnetic resonance image, a first magnetic resonance image of an examination subject is acquired, wherein the flow occurring in the examination subject is not compensated in a first spatial direction; a second magnetic resonance image is acquired, wherein the flow occurring in the first spatial direction is compensated, the phase of the magnetization in each of the first and the second magnetic resonance images is calculated of the phase difference between the first phase image and the second phase image, which is calculated is a measure for the flow along the first spatial direction. A third magnetic resonance image is acquired, wherein the flow in a second spatial direction perpendicular to the first spatial direction is not compensated, and a fourth magnetic resonance image is acquired, wherein the flow occurring in the second spatial direction is compensated.
    Type: Application
    Filed: February 24, 2006
    Publication date: October 26, 2006
    Inventors: Stefan Assmann, Oliver Schreck
  • Publication number: 20060173279
    Abstract: In a method for implementation of an imaging measurement procedure, at least three image data sets of at least one region of interest of an examination subject are obtained using different measurement parameters and/or different imaging measurement procedures. A difference image of a first and a second of the image data sets is formed and is superimposed with the third image data set. The superimposition is shown on a display medium.
    Type: Application
    Filed: December 8, 2005
    Publication date: August 3, 2006
    Inventors: Stefan Assmann, Friedrich Fuchs
  • Publication number: 20060056692
    Abstract: In a method for segmentation of a medical data set, the segmentation is implemented using markings, the markings being set in the generation of the data set.
    Type: Application
    Filed: August 9, 2005
    Publication date: March 16, 2006
    Inventor: Stefan Assmann
  • Publication number: 20060036155
    Abstract: In a method for positioning an image slice of an examination subject obtained with a diagnostic imaging apparatus, the determination of the position ensues automatically according to settable criteria. The criteria are established using an already-acquired slice or slice series.
    Type: Application
    Filed: August 9, 2005
    Publication date: February 16, 2006
    Inventor: Stefan Assmann
  • Publication number: 20060023928
    Abstract: In a method for automatic sorting and representation of medical data sets, each data set originates from a medical examination and has at least two features. All data sets that have a determinable identical value of a first of the features and a non-identical value of a second of the features are automatically ordered in a sequence corresponding to the second feature, and are shown on a display medium corresponding to the sequence.
    Type: Application
    Filed: July 26, 2005
    Publication date: February 2, 2006
    Inventor: Stefan Assmann
  • Publication number: 20050156593
    Abstract: In a method and MR apparatus for the automatic segmentation of flow images acquired by magnetic resonance tomography for the depiction of tissue or organs traversed with fluid such as blood, at least one phase image of a selected region of the subject is acquired by magnetic resonance tomography, and fluid-traversed regions in the at least one phase image are automatically segmented.
    Type: Application
    Filed: November 24, 2004
    Publication date: July 21, 2005
    Inventors: Stefan Assmann, Martin Requardt, Ingo Schmitjans, Oliver Schreck
  • Publication number: 20050033178
    Abstract: In a method and apparatus for classifying plaque in a blood vessel of a living subject using magnetic resonance imaging, a first magnetic resonance image is produced with a first intensity distribution of a cross-section of a vessel containing plaque, and a contrast agent is injected into the vascular system and a second magnetic resonance image of the cross-section of the vessel is produced with a second intensity distribution after a first time duration following the contrast agent injection, and a third magnetic resonance image of the cross-section of the vessel is produced with a third intensity distribution after a second time duration following the injection of the contrast agent, and the plaque is classified dependent on the respective intensity distributions of the magnetic resonance images.
    Type: Application
    Filed: July 23, 2003
    Publication date: February 10, 2005
    Inventors: Stefan Assmann, Oliver Schreck, Paul Finn, Stephanie Shors
  • Publication number: 20040243442
    Abstract: A user predefines for a computer a retrieval instruction for primary data of a patient or of several patients. The computer accesses the primary data of this patient and outputs them to the user via a visual display device. The primary data comprise the primary image data recorded by way of a primary imaging modality and/or primary information derived from said primary image data. The computer automatically checks whether it is possible to access secondary data of this patient, which comprise the secondary image data recorded via a secondary imaging modality and/or secondary information derived from said secondary image data. In the affirmative case, the computer outputs a corresponding message to the user via the visual display device and/or by accessing at least a portion of the secondary data of this patient and outputting said data to the user via the visual display device.
    Type: Application
    Filed: May 21, 2004
    Publication date: December 2, 2004
    Inventors: Stefan Assmann, Klaus Hambuchen, Joachim Hornegger
  • Publication number: 20040167394
    Abstract: In a method for automatic determination of the actual speed interval of a flowing medium in flow measurements in magnetic resonance imaging, an overview image (localizer) is acquired displayed on a screen, a scout flow measurement is performed by acquiring an image series during a motion cycle at a pre-determined speed interval in a tissue-area to be measured, the peak speed of the medium in the tissue area to be measured is determined on the basis of the scout flow measurement, an optimized flow measurement is performed by acquiring the same images from the acquired image series on the basis of the determined peak speed, and the speed-resolved tissue area obtained by means of the optimized flow measurement is displayed on the screen.
    Type: Application
    Filed: December 2, 2003
    Publication date: August 26, 2004
    Inventor: Stefan Assmann
  • Publication number: 20040162482
    Abstract: In a process for speed-resolved flow measurement during a movement cycle in magnetic resonance tomography, an overview image (localizer) of a selected region of a living subject is acquired using an MRT-device, the overview image (localizer) is displayed on a screen, a quasi-simultaneous acquisition of an anatomical image series of the selected region and of a speed-resolved image series of a region identified within the selected region during the movement cycle, are performed, the two image series are displayed on the screen, and when displaying the image series, each speed-resolved image of the speed-resolved image series is integrated in the time-corresponding anatomical image of the anatomical image series.
    Type: Application
    Filed: December 2, 2003
    Publication date: August 19, 2004
    Inventors: Stefan Assmann, Oliver Schreck