Nuclear magnetic resonance investigation process and apparatus for utilizing this process

摘要

The invention describes a method for determining the spectral or spatial distribution of nuclear magnetisation in a limited volume range. In this arrangement, four high-frequency pulses act on the area of investigation in the presence of a homogeneous stationary magnetic field, the last two of which pulses and one of the first two being layer-selective and the second high-frequency pulse being a 180 DEG pulse. This makes it possible to use nuclear magnetisation in the area of intersection of the layers excited by the three high-frequency pulses for generating an FID signal or a spin echo signal. IMAGE