Magnetic resonance - an image forming method, with an optimized behind the basis of phases distribution

摘要

A magnetic resonance (mr) - an image forming method for the imaging of an image field of an object, wherein a spatial mr - signal distribution with a downstream of the basis of phases distribution is generated, mr - signals are received, a reconstruction of the spatial mr - signal distribution is carried out and a mr - image is stored and / or is shown, with the reconstruction quality of the spatial distribution of the downstream of bottom phase, and wherein the shape of the bore to be behind the basis of phases distribution by means of an optimization algorithm with the reconstruction quality is determined as the optimization criterion, is characterized in that at least a spatially selective radio-frequency pulse is applied for the generation of the mr - signal distribution with the previously determined behind the basis of phases distribution, wherein the spatially selective radio-frequency pulse one behind the basis of phases offset distribution, the part of the base phases distribution, and in that the downstream of the basis of phases offset distribution in the frame of the optimization algorithm is determined, a limitation of the local variation of the downstream of the basis of phases offset distribution as a boundary condition is integrated in the optimization algorithm. In this way, the reconstruction quality is improved and at the same time a feasibility with means available guarantee strip are.