What does adjusting GAIN primarily affect on the ultrasound image?

What does adjusting GAIN primarily affect on the ultrasound image?

• A. Brightness of echoes on the image
• B. Depth of field
• C. Color Doppler sensitivity
• D. Frame rate

Answer: (A)

Adjusting gain changes how bright the ultrasound image appears by amplifying the returning echoes before display. When gain is increased, all echoes are amplified, so the grayscale image becomes brighter; when it’s decreased, echoes appear dimmer. This is why gain primarily affects the brightness of echoes on the image. It doesn’t change the focusing or depth of field, which depend on the beam and lens settings, nor the frame rate, which is set by acquisition speed and processing. Color Doppler sensitivity is governed by Doppler gain settings, not grayscale gain, so increasing gain won’t directly adjust color signal sensitivity.

Adjusting gain changes how bright the ultrasound image appears by amplifying the returning echoes before display. When gain is increased, all echoes are amplified, so the grayscale image becomes brighter; when it’s decreased, echoes appear dimmer. This is why gain primarily affects the brightness of echoes on the image. It doesn’t change the focusing or depth of field, which depend on the beam and lens settings, nor the frame rate, which is set by acquisition speed and processing. Color Doppler sensitivity is governed by Doppler gain settings, not grayscale gain, so increasing gain won’t directly adjust color signal sensitivity.