Exam-style question
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What is the purpose of the collimator in a gamma camera?.
- A.To focus gamma rays onto the detector
- B.To shield the detector from background radiation
- C.To amplify the detected signals
- D.To convert gamma rays into visible light
Model answer
What a good answer should say
- To focus gamma rays onto the detector
Explanation
Why this works
The collimator is designed to allow only gamma rays traveling in specific directions to reach the detector, improving image resolution by reducing scatter.
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