Exam-style question
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Why are radio-frequency pulses important in MRI?.
- A.They provide the energy needed to excite nuclei.
- B.They create a static magnetic field.
- C.They measure the density of tissues.
- D.They are used to cool the MRI machine.
Model answer
What a good answer should say
- They provide the energy needed to excite nuclei.
Explanation
Why this works
Radio-frequency pulses are essential in MRI as they provide the energy required to excite the nuclei, allowing for the subsequent detection of signals that form images.
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