| Patent application number | Description | Published |
|---|
| 20100019766 | System for Dynamically Compensating for Inhomogeneity in an MR Imaging Device Magnetic Field - A system automatically dynamically compensates for inhomogeneity in an MR imaging device magnetic field. An MR imaging compensation system applies swept frequency magnetic field variation in determining an estimate of proton spin frequency at multiple individual locations associated with individual image elements in an anatomical volume of interest and substantially independently of tissue associated relaxation time. For the multiple individual locations, the system determines an offset frequency comprising a difference between a determined estimate of proton spin frequency associated with an individual image element location and a nominal proton spin frequency. The system derives data representing an electrical signal to be applied to magnetic field generation coils to substantially compensate for determined offset frequencies at the multiple individual locations. An MR magnetic field coil generates a magnetic field in response to applying the electrical signal to substantially compensate for magnetic field variation represented by the determined offset frequencies at the multiple individual locations. | 01-28-2010 |
| 20100045291 | MAGNETIC RESONANCE APPARATUS AND METHOD TO ACQUIRE AND DISPLAY CALIBRATION IMAGES - In a method and magnetic resonance apparatus to acquire and present calibration images of a periodically moving organ with the use of magnetic resonance technology, calibration images are acquired by acquiring measurement data for multiple calibration images during one continuous period of the organ movement, the multiple calibration images differing in their offset frequency and/or in their spatial position in the organ to be examined, and the calibration images in a presentation manner that, from the visual quality of the respective images, allows the user to select (identify) the image acquired with the offset frequency that should then be used to acquire the diagnostic image are displayed to a user. | 02-25-2010 |
| 20100063381 | METHOD FOR DETERMINING AN ITEM OF POSITIONING INFORMATION FOR ECG ELECTRODES DURING AN EXAMINATION WITH A MAGNETIC RESONANCE FACILITY AND MAGNETIC RESONANCE FACILITY - A method for determining an item of positioning information for ECG electrodes during an examination with a magnetic resonance facility is provided. An image data record of a region surrounding the heart of a patient and the electrodes arranged on the surface of the patient is recorded. A position of the longitudinal heart axis and a position of the electrodes in the image data record are determined. A target position suited to determining evaluable ECG signals is automatically calculated for each of the electrodes by considering the position of the longitudinal heart axis and a displacement from the position of the electrodes to the target position. An item of positioning information for the electrodes is displayed by taking the displacements into consideration. | 03-11-2010 |
| 20100127702 | SYSTEM FOR ADJUSTING A MAGNETIC FIELD FOR MR AND OTHER USE - An MR magnetic field inhomogeneity compensation system acquires multiple MR data sets representing luminance intensity values of individual image elements comprising corresponding multiple different image versions of at least a portion of a first imaging slice of patient anatomy including fat and water components. The compensation system employs the multiple MR data sets in solving corresponding multiple simultaneous nonlinear equations to calculate local frequency offset associated with magnetic field inhomogeneity at the individual image element location, for an individual image element of the image elements. The local frequency offset comprises a difference between proton spin frequency at the location and a nominal proton spin frequency. The compensation system derives data representing an electrical signal to be applied to magnetic field generation coils to substantially compensate for determined offset frequencies at the plurality of individual locations. A magnetic field generation coil generates a magnetic field in response to applying the electrical signal to substantially compensate for the magnetic field inhomogeneity at the individual image element location. | 05-27-2010 |
| 20100145184 | METHOD AND MAGNETIC RESONANCE SYSTEM FOR DETERMINING A CODING FOR A FLOW MEASUREMENT AND FOR IMPLEMENTING A FLOW MEASUREMENT WITH THE CODING - In a method and magnetic resonance system to determine a flow coding for a flow measurement with the magnetic resonance system, in order to determine the optimal flow coding, a flow pre-measurement with multiple different flow codings is conducted within a slice within a body to be examined, each of these codings allowing flow velocities to be detected with a sensitivity dependent on the respective coding. A velocity distribution is generated from the results of this flow pre-measurement by a Fourier transformation. The optimal flow coding for the flow measurement is then determined based on this spectrum. The flow measurement is implemented by determining angiography measurement data of a volume within the body to be examined, determining a vessel, depending on a user input, from the angiography measurement data, automatically determining dimensions and an orientation of the vessel from the angiography measurement data, automatically determining a slice for the flow measurement depending on the dimensions and the orientation, and implementing the flow measurement in the slice with the determined optimal coding. | 06-10-2010 |
| 20100160766 | MAGNETIC RESONANCE METHOD AND SYSTEM FOR FLOW MEASUREMENT - In a method for flow measurement with a magnetic resonance system and a correspondingly designed magnetic resonance system angiography measurement data of a volume are obtained within a body to be examined, a vessel is determined depending on a user input by means of the angiography measurement data, dimensions and an orientation of the vessel are automatically determined from the angiography measurement data, a slice geometry for the flow measurement is automatically determined depending on the dimensions and the orientation, and the flow measurement is implemented using the slice geometry. | 06-24-2010 |
| 20100219831 | MAGNETIC RESONANCE METHOD CONTROL DEVICE AND SYSTEM FOR IMAGING A VOLUME SEGMENT OF A SUBJECT - For imaging a volume segment by means of a magnetic resonance system, of the volume segment is transferred into a dynamic steady state relative to the magnetization by means of the magnetic resonance system. The following steps are repeatedly executed until the volume segment has been completely measured. The slice is excited by means of the magnetic resonance system. MR signals of the slice are read out. The slice is offset in an overlapping manner such that an overlap range is created by the slice before the offset and the slice after the offset, the overlap range being a predetermined percentile of both the slice before the offset and the slice after the offset. | 09-02-2010 |
| 20100286503 | METHOD AND CONTROL DEVICE TO OPERATE A MAGNETIC RESONANCE SYSTEM - In a method of a magnetic resonance system and a method and computer-readable storage medium for the operation thereof to acquire magnetic resonance image data of an examination subject, wherein magnetic resonance system has a number of subsystems and a control device, a number of adjustment measurements to adjust at least one subsystem for making a medical diagnostic data acquisition are implemented through the control device. In these adjustment measurements, an adjustment volume associated with the appertaining adjustment measurement is taken into account that encompasses at least one region of a body containing the examination subject. For this purpose, markings established by the control device within image data of the examination subject and characterizing the spatial occupation (position and orientation) and/or a dimension of the examination subject are determined. Based on these markings the spatial occupation and extent of an adjustment volume for an adjustment measurement are determined automatically by the control device. | 11-11-2010 |
| 20100292561 | METHOD AND APPARATUS TO DETERMINE A MAGNETIC RESONANCE RELAXATION TIME IN THE HEART MUSCLE IN A MAGNETIC RESONANCE EXAMINATION - In a method and magnetic resonance (MR) system to determine an MR relaxation time (for example a T | 11-18-2010 |
| 20110103665 | GENERATION OF MOVING VASCULAR MODELS AND BLOOD FLOW ANALYSIS FROM MOVING VASCULAR MODELS AND PHASE CONTRAST MRI - A method of deriving blood flow parameters from a moving three-dimensional (3D) model of a blood vessel includes determining a reference vascular cross-sectional plane through a location of a lumen in a moving 3D model of the blood vessel at one time within the model, determining a plurality of target vascular cross-sectional planes at multiple times via temporal tracking of the reference plane based on a displacement field, determining a plurality of contours based on an intersection of the target vascular cross-sectional planes with the moving 3D vessel model at multiple times within the model, and determining a blood flow parameter of the vessel from intersections of each contour of a given one of the times with a phase contrast magnetic resonance (PC-MRI) image of the blood vessel from the corresponding time. | 05-05-2011 |
| 20110140698 | METHOD AND DEVICE FOR PHASE-SENSITIVE FLOW MEASUREMENT BY MAGNETIC RESONANCE - In a method and a device for phase-sensitive flow measurement of a volume segment of an examination subject using a magnetic resonance (MR) system, the volume segment is coded for imaging of this volume segment and a phase coding of the volume segment to code flow information of the volume segment is implemented. MR data are read out from the volume segment and the MR data are evaluated in order to generate an image of the volume segment with flow information. The phase coding to code the flow information is thereby independent of gradients which are used for spatial coding of the volume segment. | 06-16-2011 |
| 20110153231 | METHOD AND DEVICE FOR PHASE-SENSITIVE FLOW MEASUREMENT BY A MAGNETIC RESONANCE - In a method and a device for phase-sensitive flow measurement of a volume segment of an examination subject in a measurement system, the volume segment is divided into multiple partial volume segments and the following steps are executed repeatedly until the volume segment has been completely measured: movement of a table such that a center of one of the partial volume segments to be measured essentially corresponds to the isocenter of the magnetic resonance system, and implementation of the phase-sensitive flow measurement for the partial volume segment to be measured while the center of the partial volume segment essentially corresponds to the isocenter. | 06-23-2011 |
