The ultrasound technique of imaging abdominal organs is presently limited to a two-dimensional representation.The method for three-dimensional display of ultrasonic data presented here is based on computer processing of digitized data from multiple two-dimensional scans. The computer displays the total information in a perspective which can be visualized in 3 dimensions by most observers and simple modifications of the program will enable true stereoscopic images to be produced. Rotation and editing of the image is possible.Requirements in hardware and personnel time are modest and should be within the means of most large hospitals.The system should be of immediate value in radiotherapy planning, but its ultimate place in clinical diagnosis and care requires more extensive and widespread evaluation.