Abstract
We developed a three-dimensional imaging system using a. two-dimensional ultrasonic array probe. A reconstruction of the three-dimensional image, which needs no ultrasonic scanning, was performed by a transmission of ultrasonic spherical pulse and simultaneous detections of echo signal at some receivers. The experimental results indicate that a 3mm×3mm square hole in a sliced ham, a butter block and the three-dimensional structure in a rabbit heart can be reconstructed by this system.