Exam-style question
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What is the effect of acoustic impedance on the reflection of ultrasound at tissue boundaries?.
- A.Higher acoustic impedance results in more reflection.
- B.Lower acoustic impedance results in more reflection.
- C.Acoustic impedance has no effect on reflection.
- D.Reflection occurs only at air-tissue boundaries.
Model answer
What a good answer should say
- Higher acoustic impedance results in more reflection.
Explanation
Why this works
When ultrasound waves encounter a boundary between two tissues with different acoustic impedances, a greater difference in impedance leads to more reflection of the ultrasound waves. This principle is crucial for imaging as it enhances the contrast between different tissues.
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