Process for the modulation of the speed effect of moving parts of a body in a nuclear magnetic resonance density measurement and performance of the process in order to deduce therefrom the speed of the moving parts in question

摘要

The present invention relates to a process for modulating the effect of the speed of the moving parts of a body. The machines or processes for measuring the density by nuclear magnetic resonance are too sensitive at the displacement speed of the parts in question. In the invention, the sensitivity of the machines or processes is reduced in such a way that the speed effect can be measured. Prior to the measurement, compensating magnetic field sequences are applied in order to counteract the effect produced by the interfering magnetic field sequences, which are necessary for performing the measurement.