Helium plays a critical role in magnetic resonance imaging (MRI) scans. MRI is a medical imaging technique that uses a strong magnetic field and radio waves to produce detailed images of the body’s internal organs and tissues.
One of the key components of an MRI machine is the superconducting magnet, which generates a strong magnetic field. Helium is used to cool the magnet’s coils to a temperature of about -269°C, which is close to absolute zero. At this temperature, the coils become superconducting, meaning they can conduct electricity with zero resistance. This allows a large current to flow through the coils, producing a very strong magnetic field.
The strong magnetic field generated by the superconducting magnet interacts with the protons in the body’s tissues, causing them to align with the magnetic field. A radio wave is then used to “excite” these protons, causing them to emit a signal that can be detected by the MRI machine. This signal is used to create detailed images of the body’s internal structures.
In summary, helium is used to cool the superconducting magnet in an MRI machine, which generates a strong magnetic field that interacts with the body’s tissues to produce detailed images of the body’s internal structures.
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