Which system control should you adjust to compensate for sound attenuation with increasing depth?

Which system control should you adjust to compensate for sound attenuation with increasing depth?

• A. Dynamic range
• B. Transmit power
• C. TGC
• D. Focus position

Answer: (C)

To compensate for sound attenuation as depth increases, the control you use is Time Gain Compensation. The deeper the ultrasound waves travel, the more they weaken due to absorption and scattering. TGC lets you boost the amplification of echoes as depth increases, so deeper regions appear with similar brightness to shallower ones. This depth-dependent gain is typically adjustable with a set of sliders or a curved profile, allowing you to shape how much gain is added at each depth to maintain consistent image brightness. The other controls don’t specifically address depth-based attenuation. Dynamic range adjusts contrast between echoes but not the depth-dependent amplification. Transmit power changes the overall emitted energy, which can increase exposure risk and won’t selectively compensate deeper echoes. Focus position changes lateral resolution by adjusting the beam’s focal point, not the attenuation of echoes with depth. So, the best choice for compensating depth-related attenuation is Time Gain Compensation.

To compensate for sound attenuation as depth increases, the control you use is Time Gain Compensation. The deeper the ultrasound waves travel, the more they weaken due to absorption and scattering. TGC lets you boost the amplification of echoes as depth increases, so deeper regions appear with similar brightness to shallower ones. This depth-dependent gain is typically adjustable with a set of sliders or a curved profile, allowing you to shape how much gain is added at each depth to maintain consistent image brightness.

The other controls don’t specifically address depth-based attenuation. Dynamic range adjusts contrast between echoes but not the depth-dependent amplification. Transmit power changes the overall emitted energy, which can increase exposure risk and won’t selectively compensate deeper echoes. Focus position changes lateral resolution by adjusting the beam’s focal point, not the attenuation of echoes with depth. So, the best choice for compensating depth-related attenuation is Time Gain Compensation.