In ultrasound beamforming, the method in which echoes from the same depth are held in delay circuitry until all echoes from that depth are received is called what?

• A. Apodization
• B. Dynamic Receive Focusing
• C. Phased array transducers
• D. Dynamic aperture

Answer: (B)

Dynamic receive focusing is the method where the receive path uses depth-dependent delays so echoes from a given depth are coherently summed. As each echo returns, the signals are held in delay lines tuned to that depth, and once all channels’ echoes from that depth have arrived, they are combined with the proper delays to form a focused signal for that depth. This allows focusing to adapt to different depths during reception, improving image clarity. Apodization, by contrast, involves weighting signals to reduce sidelobes; dynamic aperture changes how many elements are active; and phased array transducers describe the hardware arrangement rather than the receive focusing strategy.