Abstract: An ultrasonic acoustic imaging system includes a transmitter, a sonic pulse transducer which both applies acoustic pulses to the object under examination and receives echoes or reflected impulses, a digital scan converter, a display, and special reflected pulse processing circuitry for enhancing the displayed image. The special processing circuitry includes circuitry for the frequency demodulation of the reflected pulses, circuitry for providing a signal substantially representing the envelope or the amplitude of the reflected signal, and a multiplier for combining the frequency demodulated return signals with reflected envelope signals to apply to the scan converter. Alternative arrangements are also disclosed which produce substantially the same result.