In a method for activating a magnetic resonance imaging (MRI) system for generating MRI data relating to an examination subject, in which system raw magnetic resonance (MR) data is captured, having at least one spin echo or turbo spin echo pulse sequence: a radio frequency (RF) excitation pulse is emitted to excite a region that contains a region to be imaged, the excited region being defined by a selection gradient; an RF refocusing pulse is emitted to influence a refocusing region, the refocusing region at least partly including the region to be imaged, and being defined by at least one selection gradient; and high-frequency (HF) signals are received to acquire raw MR data. A spatial extent of the excitation region is selected to be different (e.g. significantly different) from a spatial extent of the refocusing region.
ARTIFACT REDUCTION IN SPIN-ECHO MR IMAGING OF THE CENTRAL NERVOUS SYSTEM