BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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true
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false
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Either A or B
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None of the above
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Detailed explanation-1: -MRI uses magnets and radio waves to produce images on a computer. MRI does not use any radiation. Images produced by an MRI scan can show organs, bones, muscles and blood vessels.
Detailed explanation-2: -When you lie inside an MRI machine, the magnetic field temporarily realigns water molecules in your body. Radio waves cause these aligned atoms to produce faint signals, which are used to create cross-sectional MRI images-like slices in a loaf of bread.
Detailed explanation-3: -An MRI, or magnetic resonance imaging, uses a powerful magnet to pass radio waves through the body. Protons in the body react to the energy and create highly detailed pictures of the body’s structures, including soft tissues, nerves and blood vessels. Unlike X-rays and CT scans, MRIs don’t use any radiation.
Detailed explanation-4: -How does MRI work? MRIs employ powerful magnets which produce a strong magnetic field that forces protons in the body to align with that field. When a radiofrequency current is then pulsed through the patient, the protons are stimulated, and spin out of equilibrium, straining against the pull of the magnetic field.