Dong Hun Kim, Young Seok Kwon, Dong-Hyun Kang, Shinyong Shim, J. H. Park, Byung Chul Lee
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Difference-Frequency-Based Ultrasonic Contrast Imaging of Material Elasticities
The nonlinear interaction of two waves causes a signal at their difference frequency. Difference-frequency ultrasound (dfUS) is highly dependent on material stiffness, making it a superior alternative to conventional linear ultrasound when it comes to elastographic contrast imaging. We have constructed a 64-element ring array for dfUS imaging based on a 32×32 2D matrix array and conducted experiments on phantoms with various material stiffnesses. The results were quantitatively analyzed and successfully used to implement an elastographic contrast image.
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