What system control can you adjust to compensate for the effect of sound attenuation in the body?

What system control can you adjust to compensate for the effect of sound attenuation in the body?

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

Answer: (A)

The idea being tested is how to offset the weakening of ultrasound signals as they travel through tissue. Time Gain Compensation is the control that does this by applying depth-dependent amplification. By shaping a gain curve that increases with depth, deeper echoes are boosted to counteract attenuation, helping structures at greater depths appear with brightness similar to nearer ones. Dynamic range affects how wide the grayscale is and thus overall contrast, but not attenuation compensation. Frame averaging reduces speckle noise, not signal loss with depth. Depth changes imaging range but doesn’t actively compensate for attenuation. So the best control for compensating sound attenuation is Time Gain Compensation.

The idea being tested is how to offset the weakening of ultrasound signals as they travel through tissue. Time Gain Compensation is the control that does this by applying depth-dependent amplification. By shaping a gain curve that increases with depth, deeper echoes are boosted to counteract attenuation, helping structures at greater depths appear with brightness similar to nearer ones. Dynamic range affects how wide the grayscale is and thus overall contrast, but not attenuation compensation. Frame averaging reduces speckle noise, not signal loss with depth. Depth changes imaging range but doesn’t actively compensate for attenuation. So the best control for compensating sound attenuation is Time Gain Compensation.