Search Results - "O'brien, W. D."

Ultrasonic attenuation estimation of the pregnant cervix: a preliminary report by McFarlin, B. L., Bigelow, T. A., Laybed, Y., O'Brien, W. D., OELZE, M. L., Abramowicz, J. S.

“…Objective Estimates of ultrasonic attenuation (the loss of energy as an ultrasonic wave propagates through tissue) have been used to evaluate the structure and…”
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Encapsulated contrast microbubble radial oscillation associated with postexcitation pressure peaks by Santin, M. D., King, D. A., Foiret, J., Haak, A., O'Brien, W. D., Bridal, S. L.

“…This work combines modeling and experiment to assess encapsulated microbubble oscillations associated with broadband pressure peaks detected after microbubble…”
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Detection of lines and boundaries in speckle images-application to medical ultrasound by Czerwinski, R.N., Jones, D.L., O'Brien, W.D.

“…Describes an approach to boundary detection in ultrasound speckle based on an image enhancement technique. The enhancement algorithm works by filtering the…”
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Quantitative assessment of the germicidal efficacy of ultrasonic energy by SCHERBA, G, WEIGEL, R. M, O'BRIEN, W. D

“…Classifications Services AEM Citing Articles Google Scholar PubMed Related Content Social Bookmarking CiteULike Delicious Digg Facebook Google+ Mendeley Reddit…”
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Interlaboratory comparison of ultrasonic backscatter, attenuation, and speed measurements by Madsen, E. L, Dong, F, Frank, G. R, Garra, B. S, Wear, K. A, Wilson, T, Zagzebski, J. A, Miller, H. L, Shung, K. K, Wang, S. H, Feleppa, E. J, Liu, T, O'Brien, W. D., Jr, Topp, K. A, Sanghvi, N. T, Zaitsev, A. V, Hall, T. J, Fowlkes, J. B, Kripfgans, O. D, Miller, J. G

“…In a study involving 10 different sites, independent results of measurements of ultrasonic properties on equivalent tissue‐mimicking samples are reported and…”
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Line and boundary detection in speckle images by Czerwinski, R.N., Jones, D.L., O'Brien, W.D.

“…This paper considers the problem of detecting lines in speckle imagery, such as that produced by synthetic aperture radar (SAR) or ultrasound techniques. Using…”
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Determination of biomechanical properties in guinea pig esophagus by means of high frequency ultrasound and impedance planimetry by ASSENTOFT, J. E, GREGERSEN, H, O'BRIEN, W. D

“…Impedance planimetry and high-frequency ultrasound were used to determine circumferential stress and strain from measurements of luminal cross-sectional area…”
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Quantifying B-mode images of in vivo rat mammary tumors by the frequency dependence of backscatter by Topp, K. A, Zachary, J. F, O'Brien, W. D., Jr

“…To evaluate the frequency dependence of ultrasonic backscatter for its ability to differentiate between neoplastic and healthy tissue. Standard B‐mode images…”
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Superthreshold behavior and threshold estimation of ultrasound-induced lung hemorrhage in adult mice and rats by Zachary, J.F., Sempsrott, J.M., Frizzell, L.A., Simpson, D.G., O'Brien, W.D.

“…Threshold estimates and superthreshold behaviors for US-induced lung hemorrhage were investigated as a function of species (adult mice and rats) and US…”
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Superthreshold behavior and threshold estimates of ultrasound-induced lung hemorrhage in adult rats: role of beamwidth by O'Brien, W.D., Simpson, D.G., Frizzell, L.A., Zachary, J.F.

“…It is well documented that ultrasound-induced lung hemorrhage can occur in mice, rats, rabbits, pigs, and monkeys. The objective of this study was to assess…”
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A two-microphone dual delay-line approach for extraction of a speech sound in the presence of multiple interferers by Liu, C, Wheeler, B C, O'Brien, Jr, W D, Lansing, C R, Bilger, R C, Jones, D L, Feng, A S

“…This paper describes algorithms for signal extraction for use as a front-end of telecommunication devices, speech recognition systems, as well as hearing aids…”
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Localization of multiple sound sources with two microphones by Liu, C, Wheeler, B C, O'Brien, Jr, W D, Bilger, R C, Lansing, C R, Feng, A S

“…This paper presents a two-microphone technique for localization of multiple sound sources. Its fundamental structure is adopted from a binaural…”
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Propagation speed of sound assessment in the layers of the guinea-pig esophagus in vitro by means of acoustic microscopy by Assentoft, J.E, Gregersen, H, O’Brien, W.D

“…The study’s purpose was to evaluate the propagation speed of sound in the tissue layers of the esophagus at various mechanical loadings. Scanning laser…”
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A real-time approach to detect seal defects in food packages using ultrasonic imaging by Shah, N N, Rooney, P K, Ozguler, A, Morris, S A, O'Brien, Jr, W D

“…The microbial integrity of many types of flexible food packages depends on a zero defect level in the fused seam seal. Human inspection for defects in these…”
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Ultrasound-induced lung hemorrhage is not caused by inertial cavitation by O'Brien, Jr, W D, Frizzell, L A, Weigel, R M, Zachary, J F

“…In animal experiments, the pathogenesis of lung hemorrhage due to exposure to clinical diagnostic levels of ultrasound has been attributed to an inertial…”
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Ophiopogon root (Radix Ophiopogonis) prevents ultra-structural damage by SO2 in an epithelial injury model for studies of mucociliary transport by O'Brien, D W, Morris, M I, Lee, M S, Tai, S, King, M

“…We studied the action of the herb, Ophiopogon root (OR) in a epithelial injury model, hypothesizing that it may have beneficial effects on mucociliary…”
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Lung lesions induced by continuous- and pulsed-wave (diagnostic) ultrasound in mice, rabbits, and pigs by Zachary, J F, O'Brien, Jr, W D

“…These studies documented the presence or absence of macroscopic and microscopic intraparenchymal hemorrhage in individual lung lobes of mice, rabbits, and pigs…”
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Cardiopulmonary function in rats with lung hemorrhage induced by pulsed ultrasound exposure by Kramer, J. M, Waldrop, T. G, Frizzell, L. A, Zachary, J. F, O'Brien, W. D., Jr

“…To assess cardiopulmonary function in rats exposed to pulsed ultrasound using superthreshold exposure conditions known to produce significant lung hemorrhage…”
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Postpartum onset of panic disorder : a coincidental event ? by SHOLOMSKAS, D. E, WICKAMARATNE, P. J, DOGOLO, L, O'BRIEN, D. W, LEAF, P. J, WOODS, S. W

“…This study investigated whether the onset of panic for the first time during the postpartum period represented a coincidental occurrence. Sixty-four…”
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Anisotropy of ultrasonic propagation and scattering properties in fresh rat skeletal muscle in vitro by Topp, K A, O'Brien, Jr, W D

“…The anisotropy of frequency-dependent backscatter coefficient, attenuation, and speed of sound is assessed in fresh rat skeletal muscle within 5 h post-mortem…”
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