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This paper introduces the design of a constructive shear wave interference (CSI) probe: a hemi-torroid annular mechanical ring array with a center ultrasonic tracking element. The idea is to induce shear wave displacements in a ring, then track the resultant constructively interfering displacement sum at the center. The target application is in sclerotic skin conditions where current ARFI and SWEI...
Shear wave elasticity imaging (SWEI) measures mechanical properties of tissues and has been used to characterize tissue stiffness, but SWEI is limited by low displacement SNR in stiff media such as skin. A method for repeatable measurement of skin elasticity is critical for longitudinal monitoring of sclerotic diseases such as morphea. Constructive Shearwave Interference (CSI) overcomes the SNR limitations...
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