Pulse sequence for a nuclear spin tomography device with a predetermined, constant over time to inhomogeneity in one spatial direction and apparatus for carrying out of the pulse sequence

摘要

A layer vertical to the region of the inhomogeneity is excited. The nuclear spins are rephrased, and spin echo signals (S) are read out under a gradient (Gr) in a second direction (x). A phase coding gradient is switched on between the excitation and read out of the nuclear spin. The inhomogeneity acts as a permanent magnetic field gradient during the entire pulse sequence. Inhomogeneities can be allowed in two directions.