2021
DOI: 10.1109/tmi.2020.3029286
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Bayesian Approach for a Robust Speed-of-Sound Reconstruction Using Pulse-Echo Ultrasound

Abstract: Computed ultrasound tomography in echo mode (CUTE) is a promising ultrasound (US) based multi-modal technique that allows to image the spatial distribution of speed of sound (SoS) inside tissue using hand-held pulse-echo US. It is based on measuring the phase shift of echoes when detected under varying steering angles. The SoS is then reconstructed using a regularized inversion of a forward model that describes the relation between the SoS and echo phase shift. Promising results were obtained in phantoms when … Show more

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Cited by 34 publications
(43 citation statements)
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“…We use the first transducer element as a source with a Ricker wavelet of 2 MHz center frequency and all transducers as receivers. Our approach predicts traveltimes accurately, even though the frequencies of simulated ultrasonic waves are lower than those used commercially (5)(6)(7)(8)(9)(10)(11)(12). The traveltime modelling presented here is based on the ray theory, which assumes infinite frequencies.…”
Section: Validation With Numerical Simulationsmentioning
confidence: 99%
See 1 more Smart Citation
“…We use the first transducer element as a source with a Ricker wavelet of 2 MHz center frequency and all transducers as receivers. Our approach predicts traveltimes accurately, even though the frequencies of simulated ultrasonic waves are lower than those used commercially (5)(6)(7)(8)(9)(10)(11)(12). The traveltime modelling presented here is based on the ray theory, which assumes infinite frequencies.…”
Section: Validation With Numerical Simulationsmentioning
confidence: 99%
“…Speed-of-sound estimation in tissue using ultrasound has attracted considerable attention in recent years [1]- [7]. Speed of sound refers to the propagation velocity of longitudinal waves, which are typically used for image formation in ultrasound systems.…”
Section: Introductionmentioning
confidence: 99%
“…This is practically equivalent to having a virtual receiver that measures time delays between specific wave-propagation paths at every spatial location. So far, CUTE has proven excellent in retrieving correct SoS values with approximately 10 m/s contrast resolution in tissue-mimicking phantoms [27], opening up the prospect of quantitative non-invasive diagnosis with SoS imaging.…”
Section: Introductionmentioning
confidence: 99%
“…[5] used spatial phase shifts of beamformed echoes obtained under varying steering angles. One of the problems of this approach is that small variations in the inputs, for instance in the presence of measurement or phase noises can make the setup unstable [6]. Thus, [6] included an a priori model based on B-mode image segmentation in a Bayesian framework.…”
Section: Introductionmentioning
confidence: 99%
“…One of the problems of this approach is that small variations in the inputs, for instance in the presence of measurement or phase noises can make the setup unstable [6]. Thus, [6] included an a priori model based on B-mode image segmentation in a Bayesian framework. This model relies on manual segmentation of the B-mode images which might not be practical in clinical setups.…”
Section: Introductionmentioning
confidence: 99%