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3-D motion tracking and vascular strain imaging using bistatic dual aperture ultrasound acquisitions.
Phys Med Biol
December 2024
Department of Biomedical Engineering, Eindhoven University of Technology, Postbus 513, The Netherlands, Eindhoven, 5600 MB, NETHERLANDS.
This study demonstrates high volume rate bistatic 3-D vascular strain imaging, to overcome well-known challenges caused by the anisotropic resolution and contrast inherent to ultrasound imaging. Approach. Using two synchronized 32x32 element matrix arrays (3.
View Article and Find Full Text PDFCorrection: Herrera Romero, R.; Bastarrachea-Magnani, M.A. Phase and Amplitude Modes in the Anisotropic Dicke Model with Matter Interactions. 2024, , 574.
Entropy (Basel)
November 2024
Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Mexico City C.P. 09310, Mexico.
The authors wish to make the following correction to this published paper [...
View Article and Find Full Text PDFComputational Mueller matrix polarimetry holds great promise in biomedical studies and clinical applications, providing comprehensive polarization-related vectorial information within the sample. For backscattering polarization imaging systems aimed at in vivo tissue polarimetry, the measurement results can be affected by the Cartesian coordinates transformation due to the vectorial properties of polarized light and the non-collinear characteristics of the measurement system. It can influence the reliability of polarization information decoding and extraction.
View Article and Find Full Text PDFArticle Synopsis
- Fourier ptychography (FP) is a computational imaging technique that enhances image resolution and obtains phase information by using varied angles of light, but reconstructing images can be challenging, especially with noisy or incomplete data.
- To address these challenges, a new algorithm combining anisotropic total variation and Tikhonov regularizations is proposed, improving image reconstruction quality in high-throughput scenarios.
- The method, which utilizes the alternating direction method of multipliers, has been tested against other FP algorithms and shows promising results in noise reduction and preserving key details in images collected from biological specimens, even with sparse data.
Nonlinear conductivity of aqueous electrolytes: Beyond the first Wien effect.
J Chem Phys
November 2024
UMR CNRS Gulliver 7083, ESPCI Paris, PSL Research University, 75005 Paris, France.
The conductivity of strong electrolytes increases under high electric fields, a nonlinear response known as the first Wien effect. Here, using molecular dynamics simulations, we show that this increase is almost suppressed in moderately concentrated aqueous electrolytes due to the alignment of the water molecules by the electric field. As a consequence of this alignment, the permittivity of water decreases and becomes anisotropic, an effect that can be measured in simulations and reproduced by a model of water molecules as dipoles.
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