2002
DOI: 10.1121/1.1445787
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Ultrasonic wave speed measurement using the time-delay profile of rf-backscattered signals: Simulation and experimental results

Abstract: Conventional methods determine the ultrasonic wave speed measuring the medium path length propagated by a pulsed wave and the corresponding time-of-flight. In this work, the wave speed is determined without the need of the path length. A transmit transducer sends a pulsed wave into the medium (wave speed constant along the beam axis) and the backscattered signal is collected by a hydrophone placed at two distinct positions near the transmitted beam. The time-delay profile, between gated windows of the two rf-s… Show more

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Cited by 18 publications
(16 citation statements)
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“…Similar artifacts, with a stair-stepped appearance of time-delay profile, has been reported Robinson et al [23]. Simulation results given by Pereira et al [24] also confirm time-delay profiles positively biased with respect to theoretical ones.…”
Section: Discussionsupporting
confidence: 73%
“…Similar artifacts, with a stair-stepped appearance of time-delay profile, has been reported Robinson et al [23]. Simulation results given by Pereira et al [24] also confirm time-delay profiles positively biased with respect to theoretical ones.…”
Section: Discussionsupporting
confidence: 73%
“…Several correctors have been proposed to adjust the speed of sound in ultrasound imaging [50][51][52]. As a side note, because it is a constant speed method, the Stolt's f-k migration would be also limited in transcranial ultrasound imaging since the sound propagates much faster in the skull bone than in the brain.…”
Section: Pwi Using F-k Migration: Limitations and Perspectivesmentioning
confidence: 99%
“…As the PSF is assumed symmetric, only its amplitude spectrum is estimated and removed in the de-convolution scheme. Therefore, in order to obtain more accurate PSF with assuming that the PSF might be symmetric or asymmetric, we set the cepstrum for negative time to any value like below (7). The computation of the complex cepstrum is greatly simplified like the assumption of minimum phase.…”
Section: Log| ( )| = Log| ( )| + Log| ( )| (3)mentioning
confidence: 99%