Which function determines the time of flight location and the amplitude of the reflected echoes and transforms them into signals suitable for display?

Which function determines the time of flight location and the amplitude of the reflected echoes and transforms them into signals suitable for display?

• A. Signal Processing
• B. Amplification
• C. TGC
• D. Demodulation

Answer: (A)

The main idea is how echoes are turned into a displayable image by determining depth from travel time and brightness from echo strength. The time of flight tells us how far away the reflecting structure is because depth = (speed of sound in tissue × time) / 2. The echo amplitude indicates how strongly the tissue reflected the sound, which translates into brightness on the image. The function that gathers these pieces and converts the raw echoes into signals suitable for display is signal processing. This broad process includes detecting and shaping the echoes, converting the high-frequency RF data into a form that can be displayed (often through envelope detection or demodulation), applying filtering and compression, and mapping the processed signals to the grayscale brightness on the screen. Amplification, while important for preserving signal quality, does not determine depth or produce the final display signal by itself; TGC adjusts gain with depth but does not establish time-of-flight information or produce the display signal alone; demodulation is a part of signal processing, but the overall role of transforming echoes into display-ready signals falls under signal processing.

The main idea is how echoes are turned into a displayable image by determining depth from travel time and brightness from echo strength. The time of flight tells us how far away the reflecting structure is because depth = (speed of sound in tissue × time) / 2. The echo amplitude indicates how strongly the tissue reflected the sound, which translates into brightness on the image. The function that gathers these pieces and converts the raw echoes into signals suitable for display is signal processing. This broad process includes detecting and shaping the echoes, converting the high-frequency RF data into a form that can be displayed (often through envelope detection or demodulation), applying filtering and compression, and mapping the processed signals to the grayscale brightness on the screen. Amplification, while important for preserving signal quality, does not determine depth or produce the final display signal by itself; TGC adjusts gain with depth but does not establish time-of-flight information or produce the display signal alone; demodulation is a part of signal processing, but the overall role of transforming echoes into display-ready signals falls under signal processing.