Ultrasonic Scanning of Biologic Tissue by a New Technique

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Science  16 Jul 1965:
Vol. 149, Issue 3681, pp. 302-303
DOI: 10.1126/science.149.3681.302


The size of the ultrasonic beam and beam dispersion severely limit resolution by two-dimensional scanning systems. Resoluti and tissue penetration are improved by using a highly focused, ultrasonic transducer array in conjunction with an electronic timing system for the selection of particular echo information.