Patent ID: 6038465
Filing Date: 2000-03-14
Classification: A61B,G01G,G01S,G06K,G16H,Y10S

Abstract:
A system for identifying a subject of interest comprising:sound transceiving means, having a surface adapted to interface with said subject of interest, for emitting sound waves into said subject of interest and receiving sound waves reflected from interfaces of structures within said subject of interest;analyzing means operatively connected to said sound transceiving means for calculating a measured value representative of a distance between a first location and a second location by measuring a propagation time for said sound waves propagating through said subject of interest, at least one of said first and said second locations being an interface that induces back-reflection within said subject of interest; andevaluating means in communication with said analyzing means for comparing said measured value to a predetermined value calculated by measuring propagation time for sound waves propagating through a known subject.