An ultrasound scanning system having a linear array of ultrasound transducers and a transporter system for moving the transducers along the human back. There is a means for producing a position signal indicative of the position of the array along the plane of the back, and a means for producing a range...http://www.google.com/patents/US4457311?utm_source=gb-gplus-sharePatent US4457311 - Ultrasound imaging system for scanning the human back
