Coded excitation originates from which component of the ultrasound system?

Coded excitation originates from which component of the ultrasound system?

• A. Demodulator
• B. Transducer
• C. Pulser
• D. Flux capacitor

Answer: (C)

Coded excitation is generated at the transmit side by the pulser. The pulser creates high‑voltage drive signals that the transducer converts into acoustic energy, and these drive signals are encoded into patterns such as phase‑coded sequences or chirps. This coding lets more energy be sent into the tissue without increasing the instantaneous peak pressure, boosting signal-to-noise ratio and penetration. After the echoes return, pulse compression performed by the receiver recovers high axial resolution from the longer coded waveform. The demodulator handles the received RF signals but does not originate the coded transmit signal, and the transducer simply converts electrical energy into sound. Flux capacitor is not a real ultrasound component.

Coded excitation is generated at the transmit side by the pulser. The pulser creates high‑voltage drive signals that the transducer converts into acoustic energy, and these drive signals are encoded into patterns such as phase‑coded sequences or chirps. This coding lets more energy be sent into the tissue without increasing the instantaneous peak pressure, boosting signal-to-noise ratio and penetration. After the echoes return, pulse compression performed by the receiver recovers high axial resolution from the longer coded waveform. The demodulator handles the received RF signals but does not originate the coded transmit signal, and the transducer simply converts electrical energy into sound. Flux capacitor is not a real ultrasound component.