TY - JOUR

T1 - Tissue elasticity reconstruction based on three-dimensional displacement data estimated by the weighted phase gradient method

AU - Nitta, N.

AU - Shiina, T.

AU - Ueno, E.

PY - 1999

Y1 - 1999

N2 - In order to evaluate elasticity distribution based on a 3-D tissue structure, we propose a method of measuring 3-D displacement vector distribution based on the multi-beam technique. This method, which utilizes the phase shift at each element on the 2-D array aperture, is referred to as the 'weighted phase gradient method (WPGM)'. To make the proposed method applicable to the measurement of strain for large displacement (i.e., beyond wavelength), the 'combined autocorrelation method', previously proposed by us, is incorporated into the WPGM as the phase shift detector. Moreover, we attempt to reconstruct the elastic modulus distribution using the measured 3-D displacement vectors. Numerical simulation validated the feasibility of our methods in evaluating the 3-D tissue structure.

AB - In order to evaluate elasticity distribution based on a 3-D tissue structure, we propose a method of measuring 3-D displacement vector distribution based on the multi-beam technique. This method, which utilizes the phase shift at each element on the 2-D array aperture, is referred to as the 'weighted phase gradient method (WPGM)'. To make the proposed method applicable to the measurement of strain for large displacement (i.e., beyond wavelength), the 'combined autocorrelation method', previously proposed by us, is incorporated into the WPGM as the phase shift detector. Moreover, we attempt to reconstruct the elastic modulus distribution using the measured 3-D displacement vectors. Numerical simulation validated the feasibility of our methods in evaluating the 3-D tissue structure.

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M3 - Conference article

AN - SCOPUS:0033296331

VL - 2

SP - 1665

EP - 1668

JO - Proceedings of the IEEE Ultrasonics Symposium

JF - Proceedings of the IEEE Ultrasonics Symposium

SN - 1051-0117

T2 - 1999 IEEE Ultrasonics Symposium

Y2 - 17 October 1999 through 20 October 1999

ER -