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Autor:
K.D. Wallace, John W.F. Waldron
Publikováno v:
Journal of Structural Geology. 29:1430-1444
Centre-to-centre measurements are used in the Fry method of estimating fabric ellipses for strain analysis. Despite the usefulness of the method, estimation of the elliptical shape of the central vacancy field in a Fry plot is typically subjective. T
Autor:
R.J. Fedewa, K.D. Wallace, M.R. Holland, J.R. Jago, G.C. Ng, M.R. Rielly, B.S. Robinson, J.G. Miller
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 51:576-588
Autor:
Scott M. Handley, Mark R. Holland, K.D. Wallace, Ann E. Finch-Johnston, David M Prater, James G. Miller, Stephen H. Lewis, Alwyn D'Sa, Julio E. Pérez, Christopher S. Hall
Publikováno v:
Ultrasonic Imaging. 20:178-190
In this paper, we report the effects of inherent tissue anisotropy on the spectral properties of backscattered ultrasound when measured with a commercially-available imaging system. We insonified five specimens of bovine tendon immersed in a water ta
Autor:
K.D. Wallace, J.N. Marsh, L.J. Thomas, Samuel A. Wickline, John E. McCarthy, Gregory M. Lanza, Michael S. Hughes, B. N. Maurizi
Publikováno v:
2007 IEEE Ultrasonics Symposium Proceedings.
Detection of molecular epitopes associated with neo- vasculature in a growing tumor presents a unique challenge for ultrasonic clinical imaging systems. In this study, we attempt to solve the problem of detection of site-specific contrast through the
Autor:
Min Yang, Karen R. Marutyan, Mark R. Holland, James G. Miller, Steven L. Baldwin, K.D. Wallace
Publikováno v:
IEEE Ultrasonics Symposium, 2005..
Diastolic dysfunction may arise, in part, because of an increase in myocardial stiffness from cross-linking of extracellular matrix proteins such as collagen. The goal of the current study was to measure changes in myocardial attenuation resulting fr
Publikováno v:
IEEE Ultrasonics Symposium, 2005..
Results presented at previous IEEE Ultrasonics Symposia demonstrated that, in a non-aberrating medium, the field obtained by transmitting (linearly) at 2f with an "effective apodization" applied only in the azimuthal direction with a one- dimensional
Publikováno v:
AIP Conference Proceedings.
Enhancements to the compactness of the nonlinearly generated second harmonic (2f) field component (narrower main‐lobe and reduced side‐lobe levels) and reduced impact of phase and amplitude aberration, with respect to the fundamental (1f) field c
Autor:
Russell J. Fedewa, Benico Barzilai, David E. Sosnovik, Mark R. Holland, Gregory M. Lanza, Scott M. Handley, F.D. Hockett, James G. Miller, Atilla Kovacs, Christopher S. Hall, S.A. Wickline, K.D. Wallace, Ann E. Finch-Johnston, Julio E. Pérez, Stephen H. Lewis, Joel Mobley, Jon N. Marsh, Steven L. Baldwin, Rebecca L. Trousil, Victor G. Davila-Roman, Kendall R. Waters
Publikováno v:
1998 IEEE Ultrasonics Symposium. Proceedings (Cat. No. 98CH36102).
The goal of myocardial ultrasonic tissue characterization is to complement two-dimensional and Doppler echocardiography by providing information (such as assessment of regional viability based on localized values of backscatter) beyond that derived f
Autor:
Matthew Rielly, Brent S. Robinson, James G. Miller, R.J. Fedewa, Mark R. Holland, G.C. Ng, K.D. Wallace, James Jago
Publikováno v:
2001 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.01CH37263).
Correlation-based approaches to phase aberration correction rely on the spatial coherence of backscattered signals. The spatial coherence of backscatter was measured using a clinical linear array with a modified clinical imaging system (ATL HDI 5000)