A disclosed exemplary method provides complete mensuration of all two-dimensional Fourier components of a nuclear spin property and image reconstruction. In spite of unavoidable inhomogeneities of the DC magnetic field, an optimum sectional image is to be obtained. To this end, the exemplary method provides an optimally brief pulse train in that first, by means of a 90 DEG -Hf-pulse with a switched-on z-gradient a z=constant layer is excited, after termination of which an x-gradient and simultaneously a y-gradient are switched on. Following this is a 180 DEG -Hf-pulse which is followed by a z- and simultaneously a y-gradient, so that the difference between the y-gradient effect before the 180 DEG -Hf-pulse and thereafter can be varied. Then follows that particular x-gradient during which the nuclear spin echo is measured (whose symmetry center arises at a fixed time). For a NxN-image (N=number of the image points e.g. 128 in one line), measurements are taken for N such operating cycles with respectively varying differences of the y-gradient effects. The disclosed method is particularly capable of implementation in medical diagnostics (Zeugmatography).
Nuclear spin tomography method