AbstractThe up‐to‐date techniques of magnetic resonance imaging and related phenomena are surveyed. The first chapter, tutorial in character, summarizes magnetic resonance phenomena observed in static homogeneous magnetic fields, in magnetic field gradients and under radiofrequency irradiation.The second chapter deals with a theory of nuclear magnetic resonance (NMR) imagers and with typical applications of these techniques in medicine.The third chapter is devoted to the instrumentation for NMR imaging systems: magnets, coils, NMR spectrometers, transmitter/receiver systems, digital controllers, computer altorithms and image displays.The audience for this revue will include students, physicians, biomedical and electronics specialists started to work in this new branch of NMR and computer programmers as w