What is the primary reason that brightness in B-mode displays corresponds to echo amplitude?

What is the primary reason that brightness in B-mode displays corresponds to echo amplitude?

• A. Amplitude Of The Echo
• B. Echo Frequency
• C. Depth
• D. Scatter Direction

Answer: (A)

Brightness in B-mode is a visual encoding of how strong the reflected ultrasound signal is at each point along the scan line. When the pulse encounters tissue, interfaces with greater acoustic impedance mismatch return a stronger echo. The ultrasound system detects that echo amplitude and converts it into a brighter pixel on the display. Depth is determined by how long the echo takes to return, not by how bright it is, and frequency or scatter direction don’t directly set brightness. So the brightness essentially reflects the echo amplitude, with stronger echoes producing brighter areas and weaker echoes appearing darker.

Brightness in B-mode is a visual encoding of how strong the reflected ultrasound signal is at each point along the scan line. When the pulse encounters tissue, interfaces with greater acoustic impedance mismatch return a stronger echo. The ultrasound system detects that echo amplitude and converts it into a brighter pixel on the display. Depth is determined by how long the echo takes to return, not by how bright it is, and frequency or scatter direction don’t directly set brightness. So the brightness essentially reflects the echo amplitude, with stronger echoes producing brighter areas and weaker echoes appearing darker.