Exam-style question
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For Ultrasound imaging, which option best uses CT slice reconstruction to answer this objective: Calculate depth from pulse return time.?.
- A.Use CT slice reconstruction: combining projections to form cross-sectional images, so the answer is anchored to tomographic evidence.
- B.Use a clinical description only, without naming the measured physical signal.
- C.Assume all tissue produces the same detector response, so no useful contrast is formed.
- D.Ignore the limitation or safety factor and treat the method as risk-free.
Model answer
What a good answer should say
- The correct option is Use CT slice reconstruction: combining projections to form cross-sectional images, so the answer is anchored to tomographic evidence.
Explanation
Why this works
It is correct because CT slice reconstruction gives a specific physical mechanism and connects the detector or image evidence to the objective. The other options are incorrect because they either avoid the measured signal, remove contrast or detection detail, or ignore a limitation that AQA medical physics answers should consider.
Common mistake
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