How does an MRI machine work?
An MRI (magnetic resonance imaging) machine is a medical imaging device that uses a strong magnetic field, radio waves, and a computer to create detailed images of internal body structures. Here’s a brief overview of how an MRI machine works:
- Preparation: Before the MRI scan, the patient is asked to remove all metal objects, jewelry, and clothing with metal zippers or buttons. The patient lies on a table that slides into the MRI machine.
- Magnetic field: Once the patient is positioned, the MRI machine creates a strong magnetic field around the body. This magnetic field aligns the protons in the hydrogen atoms of the body’s tissues.
- Radio waves: The MRI machine then sends radio waves through the body, which cause the aligned protons to produce a faint signal. This signal is picked up by the machine’s receiver coil.
- Signal processing: The MRI machine’s computer processes the signal to create a detailed image of the body’s internal structures. The computer can create images in any plane or orientation, allowing doctors to view the body from different angles.
- Image interpretation: After the MRI scan is complete, a radiologist interprets the images to diagnose any abnormalities or conditions that may be present.
Overall, an MRI machine works by using a strong magnetic field and radio waves to create detailed images of the body’s internal structures. It is a non-invasive, painless procedure that provides valuable diagnostic information for many medical conditions.
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