So I want to know if MRI scan can be performed from a distance away. As far as I know MRI consists of a magnetic field to realign the hydrogen atoms in our body. After this the radio frequency pulse is applied and this energy is absorbed by some of the protons. When the radio frequency pulse is turned off the atoms go into a relaxation state releasing the energy as EM radiation or radio waves. This radio wave is then received by the receiver coil and translate back to an image by MRI scanner. My question is, is it possible to do this using maser to realign the atoms in our body from a distance, but then the radio frequency given off from the subject is too weak to be received by an antenna from a distance as explained in wiki ( http://en.wikipedia.org/wiki/Radiofrequency_coil ). Is there a way to strengthen such a signal so it can be received far away. I know electromagnetic radiation consists of electric field and magnetic field and is made up of photons. So if there's a way to strengthen the electric field property and make the subject's hydrogen atom produce a stronger signal.