Publications de Samuel Denys Beuret

Inverse Problems in Pulse-Echo Ultrasound: Exploiting Coherence for Image Enhancement and Quantitative Imaging

Whereas pulse-echo ultrasound imaging relied on focused acoustic waves since its inception, the last two decades have seen the development of techniques based on unfocused waves, including ultrafast ultrasound imaging. In large part due to the emergence of ...

EPFL2024

An Inverse-Problem Approach to the Estimation of Despeckled and Deconvolved Images from Radio-Frequency Signals in Pulse-Echo Ultrasound

Jean-Philippe Thiran, Samuel Denys Beuret

In recent years, there has been notable progress in the development of inverse problems for image reconstruction in pulse-echo ultrasound. Inverse problems are designed to circumvent the restrictions of delay-And-sum, such as limited image resolution and d ...

2024

Using Windowed Radon Transform to Measure Local Coherence Independently of Speed-of-Sound Variations in Plane-Wave Imaging

Jean-Philippe Thiran, Samuel Denys Beuret

Several metrics have been proposed in ultrasound pulse-echo imaging to quantify local coherence, with the coherence factor being the most prominent example. However, the coherence factor does not differentiate losses of coherence caused by variations of sp ...

Institute of Electrical and Electronics Engineers Inc.2024

Windowed Radon Transform for Robust Speed-of-Sound Imaging With Pulse-Echo Ultrasound

Jean-Philippe Thiran, Samuel Denys Beuret

In recent years, methods estimating the spatial distribution of tissue speed of sound with pulse-echo ultrasound are gaining considerable traction. They can address limitations of B-mode imaging, for instance in diagnosing fatty liver diseases. Current sta ...

Institute of Electrical and Electronics Engineers2024

Windowed Radon Transform and Tensor Rank-1 Decomposition for Adaptive Beamforming in Ultrafast Ultrasound

Jean-Philippe Thiran, Samuel Denys Beuret

Ultrafast ultrasound has recently emerged as an alternative to traditional focused ultrasound. By virtue of the low number of insonifications it requires, ultrafast ultrasound enables the imaging of the human body at potentially very high frame rates. Howe ...

Institute of Electrical and Electronics Engineers2024

Directional Cross-Correlation for Improved Aberration Phase Estimation in Pulse-Echo Speed-of-Sound Imaging

Jean-Philippe Thiran, Samuel Denys Beuret, Simon Canales

There has been a recent surge in methods targeting the recovery of a speed-of-sound map from pulse-echo ultrasound measurements. We focused in this work on a particular technique and identified a drawback shared by similar methods - namely the necessity of ...

IEEE2021

Deep Learning of Human Perception in Audio Event Classification

Samuel Denys Beuret, Yi Yu

In this paper, we introduce our recent studies on human perception in audio event classification. In particular, the pre-trained model VGGish is used as feature extractor to process audio data, and DenseNet is trained by and used as feature extractor for o ...

IEEE2018