Аннотация:New approaches to MRI on nuclei heavier than the proton are considered. An additional goal ofLarmor-tuned MRI imaging of heavy nuclei is to detect proton-free tissues and drugs within thebody in vivo. First of all, it was required to know where the fluorine-containing drugs are located- the blood substitute Perftoran introduced into the bloodstream, contrasting gases filling theairways in MRI pulmonology, etc. A similar problem arises when 23Na, 13C, 31P, 2H and othernuclei are detected in living tissues and introduced into the body medicines. It is especially important to know the content of 23Na atoms in the body, which affect the level of bloodpressure, the occurrence of diabetes and kidney pathologies. It is also of interest to obtain ahyperpolarized state of 129Xe, 83Kr, 3He, 13C, 29Si nuclei capable of amplifying MRI signalsby 4-5 orders of magnitude and providing high-contrast MRI images in real time. This work was supported by RFBR grants 19-29-10015, 20-52-10004, Russian Science Foundation 21-75-10038 and the Interdisciplinary Scientific and Educational School of Moscow State University “Photonic and Quantum Technologies. Digital Medicine ".