A model and method to accurately estimate the local speed of sound in tissue from pulse-
echo ultrasound data is presented. The model relates the local speeds of sound along a …

A method for the direct estimation of the longitudinal speed of sound in a medium is
presented. This estimator derives the speed of sound through analysis of pulse–echo data …

The acoustic attenuation coefficient of most soft biological tissues has an approximately
linear-with-frequency attenuation characteristic. The slope of the attenuation coefficient with …

Our previous methodology in local sound speed estimation utilized time delays measured by
the cross correlation of delayed full-synthetic aperture channel data to estimate the average …

Objective. Speed of sound has previously been demonstrated to correlate with fat
concentration in the liver. However, estimating speed of sound in the liver noninvasively can …

Most of clinical ultrasound imaging systems use a pre-determined sound speed, mostly
1540m/s, in transmit-and receive-beamforming while actual sound speed varies depending …

In this paper, we describe a new method of estimating the ultrasound attenuation coefficient
of soft tissue based on the entropy difference between two adjacent envelope segments of …

Purpose Ultrasound beamforming is required to obtain clinical ultrasound images. In the
beamforming procedure, the distance between the receiving focal point and each transducer …

Effective receive beamforming in medical ultrasound imaging is important for enhancing
spatial and contrast resolution. In current ultrasound receive beamforming, a constant sound …

A pulse-echo heam-tracking method for the estimation of the speed of sound in tissue is
described. We have shown that precision on the order of k0. 5 percent and accuracy on the …