This paper presents the description of a PC-based ultrasonic imaging system which generates three types of pulse-echo ultrasound images, namely, A-scan, B-scan, and C-scan, almost in real time. The system has pulser-receiver circuitry employing a single ultrasonic probe working as both the transmitter and the receiver. The generated ultrasound signal is transferred to a PC-AT using the A/D conversion facility of a digital storage oscilloscope where it is processed for target echoes with their amplitude and location. Thereafter, this information is correlated to provide a particular type of image. The probe positioning for the images is accomplished by a motorized mechanical system made up of two stepping motors. This developed ultrasonic imaging system is fully automatic, user-friendly, and operator independent.
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