| Patent application number | Description | Published |
|---|
| 20140296698 | METHOD FOR CREATING A MOTION CORRECTION FOR PET DATA, A METHOD FOR CREATING PET IMAGES AS WELL AS A CORRESPONDINGLY EMBODIED MR SYSTEM AND PET SYSTEM - A method is disclosed for creating a motion correction for PET data acquired by a PET system from a volume segment of an examination object. The method includes acquisition of MR data within the volume segment by the magnetic resonance system; and determination of a motion model of a motion within the volume segment as a function of the MR data. The motion model, as a function of a respective motion state of the motion, provides a correction specification for PET data which is acquired during this motion state. During acquisition of the MR data, specific MR data is acquired in the center of the k-space or of a straight-line segment which passes through the center of the k-space. The MR data determined is converted by a mathematical function into one value, as a function of which the respective motion state is determined. | 10-02-2014 |
| 20150042334 | METHOD AND MAGNETIC RESONANCE SYSTEM TO DETERMINE THE T1 TIME OF WATER AND THE T1 TIME OF FAT - In a method and a magnetic resonance system to determine the T1 time of water and the T1 time of fat in a predetermined volume segment of an examination subject, magnetic field gradients are activated to generate multiple gradient echoes. First echoes are acquired at at least two different echo times based on RF pulses with a first flip angle. A first water magnetization and a first fat magnetization are determined for each voxel of the volume segment from the first echoes, according to the Dixon method. Second echoes are acquired at at least two different echo times based on RF pulses with a second flip angle. A second water magnetization and a second fat magnetization are determined for each voxel of the volume segment depending on the second echoes according to the Dixon method. The T1 time of water and the T1 time of fat for each voxel are determined depending on the first water magnetization of the respective voxel, the first fat magnetization of the respective voxel, the first flip angle, the second water magnetization of the respective voxel, the second fat magnetization of the respective voxel, and the second flip angle. | 02-12-2015 |
| 20150054505 | REFERENCE OVERSAMPLING IN SENSE-TYPE MAGNETIC RESONANCE RECONSTRUCTION - Magnetic resonance imaging uses regularized SENSE reconstruction for a reduced field of view, but minimizes folding artifacts. A reference scan is oversampled relative to the reduced field of view. The oversampling provides coil sensitivity information for a region greater than the reduced field of view. The reconstruction of the object for the reduced field of view using the coil sensitivities for the larger region may have fewer folding artifacts. | 02-26-2015 |
| 20150061667 | METHOD AND APPARATUS FOR ACQUIRING MAGNETIC RESONANCE DATA AND GENERATING IMAGES THEREFROM USING A TWO-POINT DIXON TECHNIQUE - Magnetic resonance (MR) data are acquired with a two-point Dixon technique in which a first spectral component and a second spectral component, for example, a water component and a fat component, are determined. A computation grid of lower resolution in comparison to the MR data is determined, wherein each grid point of the computation grid encompasses a predetermined number of adjacent image points of the MR data. A numerical optimization is implemented for each image point of the MR data, and the first spectral component and the second spectral component are calculated analytically based on the result of the numerical optimization. | 03-05-2015 |
| 20150061672 | METHOD AND APPARATUS FOR MAGNETIC RESONANCE DATA ACQUISITION USING A MULTIPOINT DIXON TECHNIQUE - In a method and magnetic resonance (MR) apparatus to acquire MR data from a subject, a predetermined spectral model of a multipoint Dixon technique is used that includes at least two spectral components with respective associated relaxation rates, a first phase due to field inhomogeneities; and a second phase due to eddy current effects. MR data are acquired using a bipolar multi-echo MR measurement sequence for multiple image points wherein, for each image point, the multi-echo MR measurement sequence alternately uses positive and negative readout gradient fields for the readout of MR signals of the MR data at at least three echo times. The at least two spectral components are determined based on the MR data. | 03-05-2015 |
| 20150123658 | Signal Component Identification Using Medical Imaging - Disclosed herein is a framework for identifying signal components in image data. In accordance with one aspect, the framework receives multiple measured signal values corresponding to respective quantified signal components in image data. The framework determines at least one first measure of fit map of a signal model based on the measured signal values. The measured signal values may be swapped to generate swapped signal values. At least one second measure of fit map of the signal model may be determined based on the swapped signal values. The multiple signal components may then be identified by comparing the first and second measure of fit maps. | 05-07-2015 |
| 20150226824 | METHOD AND MAGNETIC RESONANCE SYSTEM FOR GENERATING MR IMAGES - In a method and a magnetic resonance (MR) system for generating MR images, MR data of a predetermined volume segment within an examination subject are acquired using the same measurement configuration of the MR system. A number of MR images are reconstructed from the MR data. Each of the MR images is assigned to a respective time point at which the MR image represents at least a part of the volume segment. A spatial resolution during the acquisition of the MR data is maintained constant because of the aforementioned same measurement configuration. The temporal distance between each two time points succeeding one another in time is not constant. | 08-13-2015 |
| 20160041247 | METHOD AND APPARATUS FOR ACCELERATED MAGNETIC RESONANCE IMAGING - In a method and apparatus for magnetic resonance (MR) imaging, a result image is provided based on multiple MR contrasts. The result image is indicative of a value of a magnetic parameter. MR data are acquired for the multiple contrasts at different time points, in each case following preparation of a magnetization. During the acquisition of the MR data, k-space is undersampled according to a respective undersampling scheme. The undersampling schemes of the different MR contrasts are different from one another. | 02-11-2016 |
