Exam-style question
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How do radio-frequency pulses contribute to MRI imaging?.
- A.They excite hydrogen nuclei to emit signals.
- B.They create a magnetic field around the patient.
- C.They measure the temperature of tissues.
- D.They enhance the contrast of ionising radiation.
Model answer
What a good answer should say
- They excite hydrogen nuclei to emit signals.
Explanation
Why this works
Radio-frequency pulses in MRI excite hydrogen nuclei, causing them to emit signals that are detected and used to form images of the body's internal structures.
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