Abstract: The invention relates to a method for the quantification of the image quality of at least one tomographic picture of an object, wherein at least one tomographic cross-sectional image is produced using a cross-sectional imaging method, in particular a magnetic resonance tomography method. As a measure of the image quality in a cross-sectional image, an image detail is measured, in particular the width of a boundary between two adjacent areas is determined, in particular with the signal intensity remaining constant in each such area, in particular said signal intensity remaining constant at least within predetermined/predeterminable boundaries.

Abstract: A magnetic field apparatus comprises a generator for generating a magnetic field of the magnetic field apparatus and a sensor for measuring the interaction between electrical charge carriers in an object and the magnetic field, wherein the electrical as charge carriers and the magnetic field are in relative motion to each other. The magnetic field apparatus may in particular be an MRI apparatus and the sensor may use the magnetohydrodynamic effect for deriving a cardiac trigger signal at any target area positioned off-centre to the heart.

Abstract: In a method to determine at least one sodium value describing the 23Na+ content in at least one region of interest in a target region in the body of a patient, at least one sodium image data set of the target region is acquired with a magnetic resonance imaging device using sodium-23 imaging, the sodium image data set including image data dependent on the occurrence of sodium. The at least one region of interest is defined for which the sodium value is to be determined in the sodium image data set. The sodium value is determined by comparison of the image data in the region of interest with reference image data of at least one subject with a defined 23Na+ content, the reference image data having been acquired with the same sequence. A local coil can be used to implement the method that has a phantom integrated therein that allows the sodium image data set and the reference image data to be acquired together.

Abstract: A magnetic-resonance imager is operated by, within the time of a R-R interval of the heart, carrying out a preparation sequence for suppressing signal contributions from the blood is carried out, in particular by a saturation sequence. At least the first refocusing pulse is generated simultaneously with a layer-selective gradient magnetic field that acts orthogonally to the layer-selective gradient magnetic field at the time of the generation of the RF excitation pulse. In addition the measuring value acquisition and image generation takes place by means of subsampling the data space and/or partially sampling the data space.