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.
UR - http://www.scopus.com/inward/record.url?scp=0033296331&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033296331&partnerID=8YFLogxK
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 -