The imaging appts. uses a stationary magnetic field and a sequence of HF pulses applied to a limited part of the body to stimulate (NMR) echo signals converted into digital sample values via Fourier transformation. The HF sequence comprises a 90 deg. HF pulse (HF1) followed by at least three subsequent 180 deg. HF pulses (HF2-HF4). The spacing (Ta) between the 90 deg. HF pulse and the first 180 deg. pulse (HF2) is greater than the spacing of the 180 deg. HF pulses (HF2-HF4) from one another. 
VERFAHREN ZUM BESTIMMEN DER SPEKTRALEN VERTEILUNG DER KERNMAGNETISIERUNG IN EINEM BEGRENZTEN VOLUMENBEREICH.