Which term describes a system control to compensate for attenuation with depth?

Which term describes a system control to compensate for attenuation with depth?

• A. Frame averaging
• B. Time Gain Compensation
• C. Depth
• D. Dynamic range

Answer: (B)

In ultrasound imaging, deeper tissues lose more energy due to attenuation, so echoes from those depths would appear dimmer unless we boost their gain. Time Gain Compensation is the control that does exactly this: it varies amplification over time (which corresponds to depth) so deeper echoes receive more gain and the image stays uniformly bright. Frame averaging helps reduce speckle noise by combining frames, not by depth-based gain. Depth is just how far away the tissue is, not a gain adjustment. Dynamic range defines the contrast between the faintest and strongest echoes displayed, not the depth compensation.

In ultrasound imaging, deeper tissues lose more energy due to attenuation, so echoes from those depths would appear dimmer unless we boost their gain. Time Gain Compensation is the control that does exactly this: it varies amplification over time (which corresponds to depth) so deeper echoes receive more gain and the image stays uniformly bright. Frame averaging helps reduce speckle noise by combining frames, not by depth-based gain. Depth is just how far away the tissue is, not a gain adjustment. Dynamic range defines the contrast between the faintest and strongest echoes displayed, not the depth compensation.