Method for ultrasonic elastic modulus calculation and imaging

Details Method for ultrasonic elastic modulus calculation and imaging Method for ultrasonic elastic modulus calculation and imaging

2005-11-22

2008-09-23

Chapman, John E (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

Reexamination Certificate

active

07426865

ABSTRACT:
Disclosed herein is a method and apparatus for generating an image of an article, wherein the image represents the articles elastic modulus. The method comprises the steps of measuring a time of flight value at a point on a test sample utilizing ultrasonic sound waves, measuring the position of the point, calculating a thickness value for the test sample, calculating a velocity value utilizing the time of flight value and the thickness value, calculating a density value for the test sample, calculating a Poisson's ratio value for the test sample, calculating an elastic modulus value utilizing the velocity value, the density value, and the Poisson's ratio value, assigning a shade of gray, or a color, to the elastic modulus values on the image, and, constructing an image utilizing the position of the point and the shaded, or colored, elastic modulus values.

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