Abstract: 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.

Abstract: 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 TE1 and at least second echo signals in at least one second raw MR data set are detected after a second echo time TE2 that is longer than TE1, a magnitude image data set is generated on the basis of the first raw MR data set and the at least one second raw MR data set with averaging of the first and the at least one second raw MR data set, and the phase image data set is generated based on the phase information contained in the at least two raw MR data sets, with averaging of the respective phase information contained in the at least two raw MR data sets.

Abstract: 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 TE1 and a second echo signal is detected after a second echo time TE2, with TE2 greater than TE1, and the first echo signal is entered in a first raw MR data set and the second echo signal is entered in a second raw MR data set. A first image data set is acquired from the first MR data set on the basis of magnitude information contained in the first MR data set. A second image data set is acquired from the second MR data set on the basis of phase information contained in the second MR data set. The first and second image data sets are stored on at least one memory device.

Abstract: A device for implementation and monitoring of thermal ablation has a device for generation of high intensity ultrasound and a magnetic resonance system for generation of examination images composed of voxels that contain temperature information. The geometry of the voxels is adapted to the shape of the ultrasound focus.

Abstract: In a method to correct a B0 field drift in a temperature map exposure obtained by magnetic resonance tomography as well as a device to implement such a method, a magnetic resonance phantom is placed at a stored, marked reference position relative to an acquisition coil. A first reference phase image of the phantom is automatically acquired in the acquisition of a first phase image of an examination subject in the unheated state. A second reference phase image of the phantom is automatically acquired in the acquisition of a later second phase image of the examination subject. The phase images are adapted to one another according to the requirements of a calibration of the associated reference phase images.

Abstract: Magnetic resonance device comprises a patient support table and a main field magnet. The main field magnet is supported so that it can be rotated around at least one axis. The patient support table is able to be rotated around an axis essentially perpendicular in respect of its table surface.

Abstract: 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.

Abstract: In a method to correct a B0 field drift in a temperature map exposure obtained by magnetic resonance tomography as well as a device to implement such a method, a magnetic resonance phantom is placed at a stored, marked reference position relative to an acquisition coil. A first reference phase image of the phantom is automatically acquired in the acquisition of a first phase image of an examination subject in the unheated state. A second reference phase image of the phantom is automatically acquired in the acquisition of a later second phase image of the examination subject. The phase images are adapted to one another according to the requirements of a calibration of the associated reference phase images.

Abstract: A device for implementation and monitoring of thermal ablation has a device for generation of high intensity ultrasound and a magnetic resonance system for generation of examination images composed of voxels that contain temperature information. The geometry of the voxels is adapted to the shape of the ultrasound focus.