How does MRI imaging work?

MRI imaging uses strong magnetic fields and radio waves to create detailed images of internal body structures.

MRI, or magnetic resonance imaging, is a medical imaging technique that uses a strong magnetic field and radio waves to create detailed images of internal body structures. The patient lies down on a table that slides into a large tube-shaped machine. Inside the machine, the patient's body is exposed to a strong magnetic field that causes the protons in the body's hydrogen atoms to align with the field.

Radio waves are then directed at the patient's body, causing the protons to absorb energy and move out of alignment. When the radio waves are turned off, the protons return to their original alignment, releasing energy in the form of radio waves that can be detected by the MRI machine's sensors.

Different types of body tissue have different amounts of hydrogen atoms, and therefore different amounts of protons. By analysing the signals from the protons, the MRI machine can create detailed images of the body's internal structures, including the brain, spine, joints, and organs.

MRI imaging is a safe and non-invasive way to diagnose a wide range of medical conditions, including cancer, heart disease, and neurological disorders. It is also used to monitor the progress of treatment and to guide surgical procedures.