The delay patterns during receive-focusing changes ______ as the transducer listens for reflections.

The delay patterns during receive-focusing changes ______ as the transducer listens for reflections.

• A. Linearly
• B. Slowly
• C. Continuously
• D. Randomly

Answer: (C)

Dynamic receive focusing relies on continuously varying time delays to keep echoes from a point aligned as depth changes. As the transducer listens, the travel times from a given point to each element change smoothly with depth, so the delays applied to each channel must be updated in real time. This continuous adjustment ensures the wavefront from that point adds constructively across the array, sharpening focus and improving image quality. The pattern isn’t fixed or stepwise, and it isn’t random; it tracks the changing geometry of propagation so delays flow smoothly with time.

Dynamic receive focusing relies on continuously varying time delays to keep echoes from a point aligned as depth changes. As the transducer listens, the travel times from a given point to each element change smoothly with depth, so the delays applied to each channel must be updated in real time. This continuous adjustment ensures the wavefront from that point adds constructively across the array, sharpening focus and improving image quality. The pattern isn’t fixed or stepwise, and it isn’t random; it tracks the changing geometry of propagation so delays flow smoothly with time.