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X-ray imaging (A-level only)

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Question 3

In emergency medicine, selecting the correct diagnostic imaging technique is vital for patient safety and diagnostic accuracy. While a computed tomography (CT) scan is the gold standard for evaluating complex thoracic trauma (including suspected internal organ lacerations, internal bleeding, and multiple displaced rib fractures), a standard planar projection X-ray remains the primary choice for assessing a suspected isolated closed fracture of the distal radius (wrist) following a minor fall.

Compare and contrast these two imaging modalities for these specific clinical scenarios.

In your answer, you should:

  • describe the fundamental physical principles of how a CT scanner acquires data and produces a detailed image
  • explain the clinical advantages of a CT scan over a standard planar X-ray when assessing complex thoracic trauma
  • discuss why a standard planar X-ray is the more appropriate and safer first-line procedure for a simple wrist fracture.
[6]
Markscheme

X-ray imaging (A-level only) Questions

  1. A Level
  2. /Physics
  3. /X-ray imaging (A-level only)

5 exam-style questions on AQA A Level Physics X-ray imaging (A-level only), covering The physics of diagnostic X-rays(A-level only), Image detection and enhancement (A-level only), Absorption of X-rays (A-level only), and CT scanner (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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