Patent application number | Description | Published |
20090096450 | BO FIELD DRIFT CORRECTION IN A TEMPERATURE MAP GENERATED BY MAGNETIC RESONANCE TOMOGRAPHY - In a method to correct a B | 04-16-2009 |
20090238429 | MAGNETIC RESONANCE TOMOGRAPHY METHOD AND APPARATUS FOR CORRECTING DRIFT OF THE B0 FIELD IN A TEMPERATURE MAP - In a method and device for correction of a B0 field drift in a temperature map acquisition by magnetic resonance tomography, a fluctuation measurement is calculated per pixel from a number of magnetic resonance tomography phase images of an examination subject or from temperature maps derived therefrom. Using this fluctuation measurement, pixels of the phase images or temperature maps with low fluctuation are determined, and corresponding pixels of a phase image to be corrected or of a temperature map to be corrected are selected using the pixels determined as having low fluctuation. The phase image to be corrected or the temperature map to be corrected is adjusted to a reference phase image or a reference temperature map such that the selected pixels of the phase image to be corrected or of the temperature map to be corrected are calibrated to corresponding pixels of the reference phase image or of the reference temperature map. | 09-24-2009 |
20100231217 | MAGNETIC RESONANCE METHOD AND APPARATUS TO ACQUIRE MULTIPLE IMAGE DATA SETS FROM A SUBJECT - In a magnetic resonance (MR) method and apparatus for the acquisition of a first image data set and a second image data set of an examination subject, a series of excitation pulses is radiated into the examination subject, and after each excitation pulse, a first echo signal is detected after a first echo time TE | 09-16-2010 |
20110092801 | METHOD FOR OBTAINING MAGNETIC RESONANCE IMAGE DATA USING A MULTI-ECHO MR SEQUENCE WITH IMPROVED SIGNAL-TO-NOISE RATIO OF THE PHASE INFORMATION - In a method and magnetic resonance (MR) system to create an MR magnitude image data set and a phase image data set of an examination subject, first echo signals in a first raw MR data set are detected after a first echo time TE | 04-21-2011 |
20110176714 | METHOD TO DETERMINE A BACKGROUND PHASE IN PHASE IMAGE DATA SETS - In a method to determine a background phase in phase values of a phase image data set that is acquired from an examination subject, wherein the background phase is determined in a partial region of the phase image data set, the phase image data set of the examination subject is acquired, and a substantially closed, planar contour is established in the phase image data set around the partial region, the planar contour having a contour area with a width of at least one pixel of the phase image data set. The phase values in the partial region are determined with the assumption that the spatial curve of the background phase is a harmonic or quasi-harmonic function, the phase values of the pixels in the partial region being determined based on the phase values in the planar contour. | 07-21-2011 |
20120068703 | METHOD FOR SPATIALLY RESOLVED DETERMINATION OF AN MR PARAMETER - In a magnetic resonance (MR) method and apparatus for spatially resolved determination of at least one MR parameter that influences an MR signal detected in an MR measurement of a region of an examination subject, first complex image data and second complex image data, respectively acquired with different acquisition coils and at different echo times in an echo imaging sequence, are provided to a processor. The different image data sets have complex image points that correspond with each other with regard to the imaged volume element of the examination subject. The MR parameter is determined in the processor for at least a portion of these image points by determination of an image point vector respectively for the first and second echo times and by combining the image point vectors to at least partially compensate echo time-independent phase or magnitude portions in the acquired image data. | 03-22-2012 |
20120092011 | MAGNETIC RESONANCE METHOD AND SYSTEM TO DETERMINE THE POSITION OF A SLICE RELATIVE TO A REGION MOVING RELATIVE TO THE SLICE - In a magnetic resonance method and system to determine a position of a slice relative to a region moving relative to the slice within a predetermined volume segment of an examination subject located in the magnetic resonance system, a physical property within the slice is detected with spatial resolution at multiple points in time, such that a time curve of the physical property is detected for at least one voxel of the slice. The position of the slice relative to the region is determined with respect to defined points in time, depending on the time curve. | 04-19-2012 |
20120116208 | TEMPERATURE MEASUREMENT NEAR AN ICE BALL USING A PROTON RESONANCE FREQUENCY METHOD AND RECALCULATION OF SUSCEPTIBILITY ARTIFACTS - In a method or system for magnetic resonance imaging based temperature monitoring for real-time feedback to a physician for a cryoablation therapy of a lesion which creates an ice ball of the lesion to induce cell death, the magnetic resonance imaging system, using proton resonance frequency imaging, obtains a real-time temperature image of the ice ball of the lesion undergoing the cryoablation therapy and the adjacent surrounding tissue. By use of an algorithm, correcting temperature errors at a border of the ice ball are corrected in the real-time image, the temperature error correction correcting susceptibility contrast errors caused by a distortion of the local magnetic field at the border of the ice ball. | 05-10-2012 |
20140107470 | METHOD AND MAGNETIC RESONANCE APPARATUS TO DETERMINE AT LEAST ONE DATUM FROM AN IMPLANTED SILICONE IMPLANT - In a method and magnetic resonance apparatus to determine at least one datum of an implanted silicone implant, at least one magnetic resonance data set is acquired, with the acquired signals of the magnetic resonance data set originating at least in part from the silicone implant. At least one spectrum is calculated from the magnetic resonance data set, and the datum is determined in a processor from the spectrum. | 04-17-2014 |
20140191754 | METHOD FOR DETERMINING THE EFFECT OF A MEDICAL DEVICE ON THE IMAGE DATA OF A MAGNETIC RESONANCE EXAMINATION AND/OR EXAMINATION SUBJECT EXAMINED BY MEANS OF MAGNETIC RESONANCE - In a method and magnetic resonance apparatus for determining at least one datum providing a measure for the effect of at least one medical device that is to be connected to, or is connected to, an examination subject in the scope of a magnetic resonance examination that is to be executed, or has been executed, on the image data that are to be obtained, or have been obtained, in the scope of a magnetic resonance examination that is to be executed, or has been executed, and/or on the examination subject that is to be examined, or has been examined, in the scope of the magnetic resonance examination that is to be executed, or has been executed, the at least one datum is determined by at least one magnetic resonance thermometric measurement. | 07-10-2014 |
20140243654 | METHOD AND APPARATUS FOR GENERATION OF IMAGE DATA BASED ON MR THERMOMETRY DATA - In a method, apparatus and medical imaging system to generate image data based on magnetic resonance (MR) thermometry data, planning data of a region of an examination subject that is to be depicted thermometrically are provided to a processor. Through the processor, segmentation data based on the planning data are generated MR thermometry data are provided to the processor, which generates image data on the basis of the MR thermometry data, using the segmentation data. | 08-28-2014 |