A normal human adult will have up to 60% of water within their body. Water is essential for survival and the assurance that all the systems in the body are functioning to achieve their purpose. The chemical structure of water composes of two hydrogen atoms attached to a single oxygen atom. Within the hydrogen’s nucleus there is a proton present and the protons respond sensitively in the presence of magnetic fields. Therefore when the magnets are activated, radio signals have been emitted from the MRI scanner to different areas of the body which results in the protons to fall out of their original position in the body. This is why gradient field coils are used and important in the use of MRI scanners because it serves as a way to set different frequencies for the magnetic field . Without the use of these coils, it will be difficult to distinguish through the …show more content…
different radio waves as they would be emitted under the same frequency.
The protons are affected in way that causes them to spin and become aligned by spinning to face the same direction (proton spin).
During that time the proton undergoes precession where the orientation of the proton changes its rotational axis to allow the proton to spin in the same frequency that it received the radio pulse/absorbed in the body. Once the radio pulse being sent into the body has been absorbed, the proton goes from a low energy level to a high energy level. The sending of the pulse must be turned off in order to allow to determine the radio pulse being emitted from the body. Therefore the proton will spin in the same frequency as the absorbed radio
pulse.
After the proton loses its energy to spin, it goes from a high energy level to a low energy level where the proton precesses back to its original position and release radio waves as a form energy in the same frequency that it received the radio signal. This is when resonance occurs when the frequency matches with that of the proton spin and leads to the radio wave being emitted. The certain and different frequencies allow different radio waves to be identified depending on where they are in the body as they would be located specifically.
This would be due to the proton density of certain tissues of the body, as a higher proton density will result in the radio wave being emitted from the body being more stronger and more intense. Certain radio signals can only be emitted from a certain location depending on their proton density.
The radio frequency coils acts as an antenna to receive the radio frequency signals that are being transmitted throughout the body and relay the received signals onto a computer. From there the detailed images of the specific location of the body can be generated for analysis.