Discuss in brief the principle and working of MRI. Why it is considered safer than x-ray tomography? (Answer limit: 100 words, Marks 10) [RPSC 2023]
Bikash BaruahBegginer
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Principle of MRI: Magnetic Resonance Imaging (MRI) uses strong magnetic fields and radio waves to generate images of organs and tissues. It relies on the magnetic properties of hydrogen atoms in water molecules, which are abundant in the body.
Working: When a patient is placed in an MRI scanner, the magnetic field aligns the hydrogen atoms. Radiofrequency pulses excite these atoms, causing them to emit signals. These signals are then captured and transformed into detailed images by a computer.
Safety: MRI is considered safer than X-ray tomography because it does not use ionizing radiation, reducing the risk of cellular damage and cancer.