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Magnetic Resonance Imaging (MRI)
Context
Magnetic Resonance Imaging (MRI) has revolutionized medical imaging since its development in the early 1970s and has become indispensable in modern healthcare.
About MRI
- Magnetic Resonance Imaging (MRI) is a non-invasive diagnostic tool used to visualize soft tissues within the body.
- Applications: MRI is crucial for diagnosing conditions such as cancer, neurological disorders, and cardiovascular diseases.
- Functional MRI (fMRI): This variant of MRI helps track brain activity by monitoring changes in blood flow.
- Limitations of MRI: MRI scans cannot be conducted on individuals with certain metallic implants or objects due to the strong magnetic fields involved.
- Working Principle of MRI:
- Hydrogen Atoms and Magnetic Fields: MRI relies on the behavior of hydrogen atoms in the body's tissues when exposed to magnetic fields.
- Components of an MRI Machine: An MRI machine consists of a powerful magnet, a radiofrequency emitter, and a detector.
- Image Reconstruction: The emitted radiofrequency pulse excites hydrogen atoms, which then emit signals detected by the machine to create images.
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