In ultrasound imaging of the boundary between tissue A and tissue B, what would be the effect of increasing the difference in acoustic impedance between A and B?Group of answer choices(c) Reflected signal amplitude would decrease(d) Reflected signal amplitude would increase(a) Doppler signal would increase(b) Signal frequency would increase
Question
In ultrasound imaging of the boundary between tissue A and tissue B, what would be the effect of increasing the difference in acoustic impedance between A and B?Group of answer choices(c) Reflected signal amplitude would decrease(d) Reflected signal amplitude would increase(a) Doppler signal would increase(b) Signal frequency would increase
Solution
The effect of increasing the difference in acoustic impedance between tissue A and B in ultrasound imaging would be (d) Reflected signal amplitude would increase.
Here's why: Acoustic impedance is a property of a material that describes how much sound pressure is generated by the vibration of molecules in the material. When an ultrasound wave hits a boundary between two tissues with different acoustic impedances, some of the wave is reflected back towards the source and some is transmitted into the second tissue. The greater the difference in acoustic impedance between the two tissues, the more of the ultrasound wave is reflected back. This means that the amplitude of the reflected signal would increase.
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