Patent ID: 9651643
Date: 2017-05-16
CPC Classifications: G01R

Claim:
1. A method for operating a magnetic resonance system, the method comprising: exposing a transmit coil system acting on an examination volume to high-frequency transmit pulses so that atomic nuclei of a predetermined type of atomic nucleus of an examination object introduced into the examination volume are excited by the high-frequency transmit pulses to cause an emission of magnetic resonance signals; exposing a gradient magnetic system acting on the examination volume to a gradient current at a same time as an exposure of the examination volume to a subpulse of the high-frequency transmit pulses so that gradient magnetic fields are superimposed on a temporally static and locally homogeneous basic magnetic field generated by a basic magnet in the examination volume; and matching the gradient current and the subpulse of the high-frequency transmit pulses at the same time to each other such that the atomic nuclei excited to cause the emission of magnetic resonance signals are exclusively atomic nuclei with a velocity within a predetermined velocity range, while the excitation is independent of variations in a Larmor frequency of a relevant type of atomic nucleus caused by inhomogeneities of the basic magnetic field, chemical displacement, or the inhomogeneities of the basic magnetic field and the chemical displacement.