TY - GEN
T1 - Shear Shock Wave Focusing in Human Skull Phantom
T2 - 2018 IEEE International Ultrasonics Symposium, IUS 2018
AU - Tripathi, Bharat B.
AU - Espíndola, David
AU - Chandrasekaran, Sandhya
AU - Pinton, Gianmarco F.
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018
Y1 - 2018
N2 - We have recently observed that smooth low acceleration shear waves develop into destructive high acceleration shear shocks as they propagate in fresh ex vivo porcine brain. We hypothesize that local amplification of acceleration at the shock front can damage neurons and be responsible for a wide range of traumatic brain injuries. Currently there are no simulation tools for modeling the propagation of shear shock waves in human head. Here, 1) a new system of equations is presented to model the propagation of linearly-polarized shear shock waves in isotropic solids, 2) a generalized Maxwell body is used to model the attenuation/dispersion in soft solids, described by a power law with non-integral exponents, and 3) the resulting system is numerically simulated using a custom high-order finite volume method: piecewise parabolic method. A simulation of shear waves in human skull with brain parameters is shown, along results from on-going experiments of shear wave propagation in gelatin using the same geometry.
AB - We have recently observed that smooth low acceleration shear waves develop into destructive high acceleration shear shocks as they propagate in fresh ex vivo porcine brain. We hypothesize that local amplification of acceleration at the shock front can damage neurons and be responsible for a wide range of traumatic brain injuries. Currently there are no simulation tools for modeling the propagation of shear shock waves in human head. Here, 1) a new system of equations is presented to model the propagation of linearly-polarized shear shock waves in isotropic solids, 2) a generalized Maxwell body is used to model the attenuation/dispersion in soft solids, described by a power law with non-integral exponents, and 3) the resulting system is numerically simulated using a custom high-order finite volume method: piecewise parabolic method. A simulation of shear waves in human skull with brain parameters is shown, along results from on-going experiments of shear wave propagation in gelatin using the same geometry.
KW - generalized Maxwell Body
KW - piecewise parabolic method
KW - shear shock waves
KW - traumatic brain injury
UR - https://www.scopus.com/pages/publications/85062487542
U2 - 10.1109/ULTSYM.2018.8579968
DO - 10.1109/ULTSYM.2018.8579968
M3 - Conference Publication
AN - SCOPUS:85062487542
VL - 2018-January
T3 - IEEE International Ultrasonics Symposium, IUS
BT - IEEE International Ultrasonics Symposium, IUS
Y2 - 22 October 2018 through 25 October 2018
ER -