Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Scott M. Handley"'
Autor:
James G. Miller, Frank Ngo, K.C. Crowder, Shiow Jiuan Lin, Samuel A. Wickline, Scott M. Handley, John S. Allen, Christopher S. Hall, Michael S. Hughes, Mark McLean
Publikováno v:
Ultrasound in Medicine & Biology. 29:659-669
To define the impact of age on microscopic structural remodeling after myocardial infarction, the physical properties of infarct scar tissue and viable remote zone tissues in young (3 months) and older adult (18 months) Fischer rats were quantified w
Autor:
Mark R. Holland, Ann E. Finch-Johnston, Julio E. Pérez, James G. Miller, Scott M. Handley, Ursula M. Wilkenshoff
Publikováno v:
Journal of the American Society of Echocardiography. 11:929-937
We measured the regional disparity in backscattered ultrasound by means of obtaining integrated backscatter images of 10 healthy subjects and placing a region of interest in 18 distinct positions. A computer model simulating the short-axis view was i
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:
James G. Miller, Samuel A. Wickline, Julio E. Pérez, Ann E. Finch-Johnston, Joel Mobley, Scott M. Handley, Christopher S. Hall, Mark R. Holland, Kirk D. Wallace
Publikováno v:
Nondestructive Testing and Evaluation. 14:217-235
Diagnostic ultrasonic characterization of the heart is designed to assess the state of the myocardium with ultrasonic parameters that relate to structural or functional components of cardiac muscle. The potential cross fertilization of ideas and meth
Autor:
Brent K. Hoffmeister, Samuel A. Wickline, Scott M. Handley, James G. Miller, Edward D. Verdonk
Publikováno v:
The Journal of the Acoustical Society of America. 97:3171-3176
Recent studies from our laboratory have detailed the anisotropy of velocity of quasilongitudinal-mode ultrasonic waves through formalin fixed samples of normal human myocardium and bovine Achilles tendon. Results of these studies were used to determi
Publikováno v:
IEEE Symposium on Ultrasonics, 2003.
The goal of this work is to explore the possibility that strain-derived estimates of cardiac performance can be enhanced by including the consequences of myocardial anisotropy. Promising results based on strain-derived measurements have been reported
Publikováno v:
IEEE 1988 Ultrasonics Symposium Proceedings..
The relationship between contrast and azimuthal angle in the ultrasonic polar backscatter technique was investigated, with the working hypothesis that the contrast between porous and pore-free regions should decrease as the azimuthal angle of insonif
Publikováno v:
IEEE 1991 Ultrasonics Symposium.
Experimental results of the anisotropy of the frequency dependence of ultrasonic attenuation in unidirectional graphite/epoxy composite are presented. A sample with flat and parallel faces was interrogated in reflection mode with 5-MHz longitudinal a
Publikováno v:
IEEE Symposium on Ultrasonics.
It is hypothesized that the impact of measurements of the properties of advanced composite materials can be substantially enhanced through the use of improved visualization techniques. Values of the elastic stiffness coefficients C/sub 11/, C/sub 12/
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