13. Conclusion and Future Horizons

The resonance phenomenae are in common use in many technologies, we enjoy today. Use of RF (radio frequency) electromagnetic radiation, magnetic resonance of molecules, for the human body, to produce an image, deserves special recognition. MRI is a non invasive application of science, to the diagnostics of various diseases and disorders in human body and is particularly challenging, in the human brain arena. The renounce phenomena used in MRI is little different in principle from other applications. The well known applications are the radio broadcast, the production of television picture, Laser, etc. The subtle difference lies in the selection of the frequency band of radiation, out of the very wide electromagnetic radiation band. TV broadcast uses the visible (light) part of the electromagnetic, radiation spectrum, to produce pictures, and the microwaves are used, to carry it and broadcast over large distances. On the receiving end, electrical resonance phenomena, in the electrical circuits, is used to produce the picture. This picture is about the movement of the external parts of an object or of a living body. The TV picture is clearly visible to the naked eye. MRI uses the dark (invisible) RF radiation. It brings out the behavior of internal molecular movements which are not visible to the naked eye.