K
Keith A. Wear
Researcher at Food and Drug Administration
Publications - 149
Citations - 4327
Keith A. Wear is an academic researcher from Food and Drug Administration. The author has contributed to research in topics: Attenuation & Imaging phantom. The author has an hindex of 35, co-authored 149 publications receiving 3852 citations. Previous affiliations of Keith A. Wear include Washington University in St. Louis & University of Wisconsin-Madison.
Papers
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Journal ArticleDOI
Ultrasonic tissue characterization with integrated backscatter. Acute myocardial ischemia, reperfusion, and stunned myocardium in patients
Mark R. Milunski,G.A. Mohr,Julio E. Pérez,Zvi Vered,Keith A. Wear,Carl J. Gessler,Burton E. Sobel,James G. Miller,S.A. Wickline +8 more
TL;DR: Ulasonic tissue characterization promptly detects acute myocardial infarction and may delineate potential beneficial effects of coronary artery reperfusion manifest by restoration of cyclic variation of integrated backscatter in the presence of severe wall motion abnormalities.
Journal ArticleDOI
Interlaboratory comparison of ultrasonic backscatter, attenuation, and speed measurements.
Ernest L. Madsen,Fang Dong,Gary R. Frank,B. S. Garra,Keith A. Wear,Thaddeus Wilson,James A. Zagzebski,H. L. Miller,K. Kirk Shung,Shyh-Hau Wang,Ernest J. Feleppa,Tian Liu,William D. O'Brien,Karen A. Topp,N. T. Sanghvi,A. V. Zaitsev,Timothy J. Hall,J. B. Fowlkes,Oliver D. Kripfgans,James G. Miller +19 more
TL;DR: Reasonably good agreement exists for attenuation coefficients, but less satisfactory results were found for propagation speeds, and agreement was not impressive in the case of backscatter coefficients.
Journal ArticleDOI
Frequency dependence of ultrasonic backscatter from human trabecular bone: theory and experiment.
TL;DR: A model describing the frequency dependence of backscatter coefficient from trabecular bone is presented and suggests that absorption is likely to be a larger component of attenuation than scattering at diagnostic frequencies.
Journal ArticleDOI
Application of autoregressive spectral analysis to cepstral estimation of mean scatterer spacing
TL;DR: An autoregressive (AR) spectral estimation method is compared with a conventional fast Fourier transform (FFT)-based approach for this task and offers promise for enhanced spatial resolution and accuracy in ultrasonic tissue characterization and nondestructive evaluation of materials.
Journal ArticleDOI
Interlaboratory comparison of ultrasonic backscatter coefficient measurements from 2 to 9 MHz.
Keith A. Wear,Timothy A. Stiles,Gary R. Frank,Ernest L. Madsen,Francis Cheng,Ernest J. Feleppa,Christopher S. Hall,Beom Soo Kim,Paul Lee,William D. O'Brien,Michael L. Oelze,Balasundar Iyyavu Raju,K. Kirk Shung,Thaddeus Wilson,Jian R. Yuan +14 more
TL;DR: This second interlaboratory comparison of ultrasonic backscatter, attenuation, and speed measurements extends the upper limit of the frequency range from 7 to 9 MHz.