What phenomenon is described by acoustic enhancement in ultrasound imaging?

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Multiple Choice

What phenomenon is described by acoustic enhancement in ultrasound imaging?

Acoustic enhancement happens when ultrasound energy passes more easily through a structure with low attenuation, such as a fluid-filled cyst, than through surrounding tissue. Because less sound is absorbed or scattered in that structure, more energy reaches the tissues behind it, and the echoes from those distal tissues are stronger and appear brighter on the image. So the phenomenon is described by the amount of sound passing through. In contrast, increased reflection at tissue interfaces creates strong echoes at boundaries but doesn’t necessarily boost posterior signals; Doppler shift relates to moving blood flow; and acoustic shadowing behind calcifications causes reduced signals beyond the calcified area.

Acoustic enhancement happens when ultrasound energy passes more easily through a structure with low attenuation, such as a fluid-filled cyst, than through surrounding tissue. Because less sound is absorbed or scattered in that structure, more energy reaches the tissues behind it, and the echoes from those distal tissues are stronger and appear brighter on the image. So the phenomenon is described by the amount of sound passing through. In contrast, increased reflection at tissue interfaces creates strong echoes at boundaries but doesn’t necessarily boost posterior signals; Doppler shift relates to moving blood flow; and acoustic shadowing behind calcifications causes reduced signals beyond the calcified area.

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