Exam-style question
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What is a primary limitation of gamma camera imaging compared to ultrasound?.
- A.Gamma cameras are less portable than ultrasound machines.
- B.Gamma cameras cannot visualize soft tissues.
- C.Gamma cameras expose patients to ionising radiation.
- D.Gamma cameras provide lower resolution images than ultrasound.
Model answer
What a good answer should say
- Gamma cameras expose patients to ionising radiation.
Explanation
Why this works
While gamma cameras provide valuable functional imaging, they use radioactive tracers that emit ionising radiation, posing a risk to patients. In contrast, ultrasound uses sound waves, which are non-ionising and safer for patients.
This key difference makes ultrasound a preferred option in situations where radiation exposure is a concern, especially in vulnerable populations like pregnant women.
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