Measuring elastic properties of isotropic materials using the scanning acoustic microscope

Despite its beginning as an imaging tool, the scanning acoustic microscope has become the tool of choice for obtaining quantitative information about the mechanical properties of a sample when microscopic spatial resolution is required. Essential points in the experimental use of the scanning acoustic microscope will be reviewed with emphasis placed on issues, materials and developments of concern to a medical transducer designer. A simple methodology will be discussed for measuring the elastic moduli of isotropic materials along with expressions to determine the error propagation of the technique.

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