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The recent discovery of shear shock wave generation and propagation in the porcine brain suggests that this new shock phenomenology may be responsible for a broad range of traumatic injuries. Blast-induced head movement can indirectly lead to shear wave generation in the brain, which could be a primary mechanism for injury. Shear shock waves amplify the local acceleration deep in the brain by up to...
Numerical methods that solve the nonlinear parabolic wave (KZK) equation and satisfy the Rankine-Hugoniot relation for shock wave propagation at all attenuation strengths are described and characterized. By comparison with a known planar solution, it is demonstrated that current numerical methods in the time domain predict a shock front that is stationary relative to the propagation phase in the inviscid...
Acoustic radiation force impulse (ARFI) imaging has been reported as a successful method of measuring mechanical properties of tissue. Current methods use linear arrays to obtain a 2D image of tissue displacement. In this study, we have modified our real-time 3D ultrasound system (Volumetrics Medical Imaging, Durham, NC) to acquire volumetric ARFI data and create 3D displacement images. To ensure...
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