Medical Imaging

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1. How does fMRI monitor oxygen uptake in the brain?

  • oxyhaemoglobin absorbs radiation so active parts light up
  • parts of the brain with large water content swell up
  • deoxyhaemoglobin absorbs radio waves so active parts light up
  • deoxyhaemoglobin reflects the radio waves so unactive part lights up
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Other questions in this quiz

2. Which produces the most detailed picture of the body?

  • MRI scan
  • CT scan
  • X-ray

3. What are CT scans used for?

  • recovering from surgery
  • analysis of soft tissues
  • looking for broken bones

4. Which is NOT a drawback of MRI?

  • only gives a historical picture
  • removes risk of x-rays
  • its noisy

5. A CT scan uses tiny x-rays, true or false?

  • false - magnetic rays are used instead
  • true - they are reduced in strength by density of the tissue they pass through and then detected to form a picture
  • false - no x-rays are used, it is a camera
  • true - they are reflected by tissue according to its colour and detected to form a picture


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