Search Results - "Bigelow, T. A."

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…”
Get full text

OP04.04: Development of an in vivo quantitative ultrasound methodology to scan the cervix by McFarlin, B. L., Oelze, M. L., Bigelow, T. A., Chien, E. K., Ji, H., O'Brien, W. D.

Get full text

A theoretical comparison of attenuation measurement techniques from backscattered ultrasound echoes by Labyed, Yassin, Bigelow, Timothy A.

“…Accurate characterization of tissue pathologies using ultrasonic attenuation is strongly dependent on the accuracy of the algorithm that is used to obtain the…”
Get full text

P17.04: Ultrasonic tissue characterization of the pregnant human cervix by McFarlin, B. L., Kumar, V., Bigelow, T. A.

Get full text

Ultrasound attenuation estimation using backscattered echoes from multiple sources by Bigelow, Timothy A.

“…The objective of this study was to devise an algorithm that can accurately estimate the attenuation along the propagation path (i.e., the total attenuation)…”
Get full text

Improving efficiency of ultrasound histotripsy sources by transmitting at the second harmonic frequency by Bigelow, Timothy A.

“…Therapeutic ultrasound has shown potential for improving many aspects of medical care in recent years. Therapeutic ultrasound often involves high pressures or…”
Get full text

The CDA sub-council on young dentists--a historical perspective by Bigelow, T A

Get more information

Evaluation of the spectral fit algorithm as functions of frequency range and Delta Kappa a sub(eff) by Bigelow, T A, O'Brien, WD Jr

“…Considerable effort has been directed at quantifying the properties of the tissue microstructure (i.e., scatterer correlation length) to diagnose disease and…”
Get full text

Evaluation of the spectral fit algorithm as functions of frequency range and /spl Delta//spl kappa/a/sub eff by Bigelow, T.A., O'Brien, W.D.

“…Considerable effort has been directed at quantifying the properties of the tissue microstructure (i.e., scatterer correlation length) to diagnose disease and…”
Get full text

Estimation of total attenuation and scatterer size from backscattered ultrasound waveforms by BIGELOW, Timothy A, OELZE, Michael L, O'BRIEN, William D

“…Quantitative ultrasound techniques using backscattered echoes have had limited success in vivo due to the frequency-dependent attenuation along the entire…”
Get full text

Scatterer size estimation in pulse-echo ultrasound using focused sources: Theoretical approximations and simulation analysis by BIGELOW, Timothy A, O'BRIEN, William D

“…The speckle in ultrasound images has long been thought to contain information related to the tissue microstructure. Many different investigators have analyzed…”
Get full text

Scatterer size estimation in pulse-echo ultrasound using focused sources: Calibration measurements and phantom experiments by BIGELOW, Timothy A, O'BRIEN, William D

“…In a companion paper [T. A. Bigelow and W. D. O'Brien Jr., J. Acoust. Soc. Am. 116, 578 (2004)], theory, supported by simulations, showed that accurate…”
Get full text

Signal processing strategies that improve performance and understanding of the quantitative ultrasound SPECTRAL FIT algorithm by BIGELOW, Timothy A, O'BRIEN, William D

“…Quantifying the size of the tissue microstructure using the backscattered power spectrum has had limited success due to frequency-dependent attenuation along…”
Get full text

A model for estimating ultrasound attenuation along the propagation path to the fetus from backscattered waveforms by BIGELOW, Timothy A, O'BRIEN, William D

“…Accurate estimates of the ultrasound pressure and/or intensity incident on the developing fetus on a patient-specific basis could improve the diagnostic…”
Get full text

Experimental evaluation of indicators of nonlinearity for use in ultrasound transducer characterizations by Bigelow, Timothy A, O'Brien, Jr, William D

“…Because the number of applications for medical ultrasonic devices continue to increase and, hence, the number of diagnostic ultrasound (US) systems increase,…”
Get more information

Application of system modeling to the development of complex systems by Edmunson, S.A., Botterbusch, R.D., Bigelow, T.A.

“…Two examples of system modeling are discussed. The first highlights work performed to develop tools and methods which will allow rapid prototyping of flight…”
Get full text

The cold clinic--an attempt, a realistic concept? by Bigelow, A T, Morton, M

Get more information

Scatterer size estimation using a generalized ultrasound attenuation-compensation function to correct for focusing by Bigelow, T.A., O'Brien, W.D.

“…The frequency statistics of the backscattered waveform observed between tissue boundaries can be matched to a model to estimate the characteristic size of the…”
Get full text

Experimental evaluation of some possible nonlinearity indicators by Bigelow, T.A., O'Brien, W.D.

“…Due to regulatory reasons, the output levels of ultrasound sources for use in medical applications must be known. Currently, this is done by making focal…”
Get full text

Long-Haul Truck Driver Training Does Not Meet Driver Needs in Canada by Malkin, Jennifer, Crizzle, Alexander M, Zello, Gordon, Bigelow, Philip, Shubair, Mamdouh

“…Introduction: Training standards for long-haul truck drivers (LHTD) are rapidly evolving in Canada, yet the opinions of the drivers themselves have not been…”
Get full text