What term describes using the range equation with pulsed-wave imaging to determine reflector depth?

What term describes using the range equation with pulsed-wave imaging to determine reflector depth?

• A. Beamforming
• B. Echo Ranging
• C. Doppler Shift
• D. Attenuation

Answer: (B)

This concept focuses on using the time it takes for an ultrasound pulse to travel to a reflector and back, together with the known speed of sound in tissue, to calculate depth. In pulsed-wave imaging, you emit a short pulse, measure the round-trip travel time of the echo, and apply the range equation: depth = (speed of sound) × (round-trip time) / 2. This direct link between time of flight and distance is exactly what echo ranging describes—the process of determining reflector depth from the echo's travel time. Beamforming, by contrast, is about shaping and steering the acoustic beam with multiple elements; Doppler shift concerns measuring motion via frequency changes; attenuation refers to the weakening of signal amplitude with depth and tissue properties.

This concept focuses on using the time it takes for an ultrasound pulse to travel to a reflector and back, together with the known speed of sound in tissue, to calculate depth. In pulsed-wave imaging, you emit a short pulse, measure the round-trip travel time of the echo, and apply the range equation: depth = (speed of sound) × (round-trip time) / 2. This direct link between time of flight and distance is exactly what echo ranging describes—the process of determining reflector depth from the echo's travel time.

Beamforming, by contrast, is about shaping and steering the acoustic beam with multiple elements; Doppler shift concerns measuring motion via frequency changes; attenuation refers to the weakening of signal amplitude with depth and tissue properties.