Imaging technique and magnetic resonance tomograph

摘要

The invention relates to a method to operate a nuclear resonance tomograph involving the suppression of image artifacts that are brought about by interfering nuclear spins, a transverse magnetization being generated in a volume of interest by applying a slice-selective HF excitation pulse to nuclear spins in the presence of a first magnetic field gradient and a polarizing magnetic field, and a spin echo being subsequently generated by means of at least a second slice-selective HF pulse in conjunction with a magnetic field gradient. The method is carried out according to the invention in such a way that, outside of at least one target volume to be examined, the transversal magnetization after the application of the HF excitation pulse is disturbed by at least one additional magnetic field gradient.