MRI Machines

The images a MRI machine actually present are the water molecules that make up most of our bodies systems and organs. Water molecules consist of oxygen and hydrogen atoms, the core of which is a nucleus, a single proton. The protons have a basic property called nuclear spin as well as an electrical charge which makes them act like little magnets. When the magnetic field makes the spinning protons wiggle, the stronger the magnetic field, the faster the wiggle. Nuclei wiggle at roughly 50 million times per second. If a proton is excited by some energy like a radio wave it will send that energy back as a radio signal that is slightly detectable.
A MRI is basically a strong magnet, radio transmitter and receiver, as well as electronics to organize or coordinate their operation. The magnet creates the strong magnetic field, stronger than the earth’s magnetic field. The radio transmitter then beams intense burst of radio waves into a person, to excite the wiggling protons and the receiver detects the protons slight return radio signal. …show more content…
MRI manipulate both the magnetic field and the radio energy to distinguish protons from one another and different parts of the body emit different radio signals. MRIs detect all these different signals and the machine automatically figures out where they all came from and builds up an image.
MRI also notices the strength of the radio signals, where there is more water the signal is stronger than where there is less water. The different strengths of the radio waves reflect in the image allowing for it to be filled with the proper shades of