Exam-style question
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What is the principle behind resonance in MRI?.
- A.It involves the absorption of energy by nuclei in a magnetic field.
- B.It uses high-frequency sound waves to create images.
- C.It relies on ionising radiation to produce detailed images.
- D.It measures the electrical activity of the brain.
Model answer
What a good answer should say
- It involves the absorption of energy by nuclei in a magnetic field.
Explanation
Why this works
Resonance in MRI occurs when nuclei in a magnetic field absorb energy from radio-frequency pulses, causing them to emit signals that are used to create images.
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