Which of the following is one of the five functions of the receiver?

• A. Amplification
• B. Compensation
• C. Rejection
• D. TGC

Answer: (A)

The main idea is how the ultrasound receiver handles echoes after they’re detected. The receiver’s first and essential job is to boost the faint incoming signals so they can be processed further. Amplification raises the amplitude of the received echoes, making even weak signals detectable and improving the signal-to-noise ratio. This gain is adjustable to optimize image quality and ensure the subsequent processing stages can work effectively.

Compensation, including depth-dependent time gain compensation (TGC), adjusts signal levels with depth to account for attenuation, but it’s a specific method of amplification rather than a separate, standalone function. Rejection helps suppress noise and low-level signals, and other steps like demodulation and compression shape the signal for display, but without amplification, there wouldn’t be a strong enough signal to process at all. So amplification is the fundamental receiver function best described here.