Two or more ultrasound transducer probes applied to a body give information regarding the relative position of each by determining the time of transit of sound energy between each probe. Besides knowledge of the range from one probe to another, the orientation and bearing of one probe to the other is...http://www.google.fr/patents/US6120453?utm_source=gb-gplus-shareBrevet US6120453 - Three-dimensional ultrasound system based on the coordination of multiple ultrasonic transducers
Three-dimensional ultrasound system based on the coordination of multiple ...