MRI creates a strong magnetic field and the small biological magnets in the human body consisting of protons in the nucleus of the hydrogen atom are magnetized.
Theproton possess fundamental magnetic properties.
- First, MRIcreates a steady state of magnetism within the human body by placing the body in a steady magnetic field.
- Second, the MRI stimulates the body with radio waves to change the steady-state orientation of protons.
- Third, the MRI machine stops the radio waves and registers the body s electromagnetic transmission.
- Fourth, the tranmitted signal are used to construct internal images of the body by computerized axial tomography.
An MRI image is not a photograph. it is actually a computerized map or image of radio signals emitted by the human body.
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