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Simon Hackl (JKU Linz)10/2/25, 3:35 PM
Focused ultrasound is a widely used non-invasive diagnostic and therapeutic tool in modern medicine. A crucial assumption in of its all applications is a constant sound speed in the observed medium. Non-constant sound speeds lead to actual times of flight of the ultrasound waves through the medium differing from calculated times of flight, which are accounted for in focusing algorithms. This...
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yıldız Oruklu (Ricam)10/2/25, 4:00 PM
Medical ultrasound images are frequently reconstructed using simplifying assumptions regarding acoustic wave propagation. A prevalent assumption is that sound speed is uniform across the imaging medium. However, different tissue types posess varying sound speeds, which leads to image distortions and defocusing. This talk introduces a precise and computationally efficient method for...
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Dr Roland Wagner (RICAM)10/2/25, 4:25 PM
In the upcoming generation of Extremely Large Telescopes (ELT), with mirror diameters of up to 40 m, the impact of the turbulent atmosphere is corrected by Adaptive Optics (AO) systems, such as Single Conjugate Adaptive Optics (SCAO) within the Multi-AO Imaging Camera for Deep Observations (MICADO) of ESO's ELT. However, the quality of astronomical images still is degraded due to the time...
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Lukas Weissinger (RICAM - Johann Radon Institute for Computational and Applied Mathematics)10/2/25, 4:50 PM
Atmospheric tomography, the problem of reconstructing atmospheric turbulence profiles from wavefront sensor measurements, is an integral part of
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many adaptive optics systems. It is used to enhance the image quality of
ground-based telescopes, such as for the Multiconjugate Adaptive Optics Relay For ELT Observations (MORFEO) instrument on the Extremely Large
Telescope (ELT).
Singular-value...
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