4th Alps-Adriatic Inverse Problems Workshop 2025 (AAIP 2025)

Session

Session 4

Oct 2, 2025, 3:35 PM

O.0.01

38. Sound Speed and Layer Adapted Focusing Methods in Medical Ultrasound

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...

44. Layer Adapted Time of Flight Calculation using Interpolation for Medical Ultrasound Imaging

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...

34. Off-axis PSF reconstruction for first light instruments on the ELT

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...

42. Singular Value-based Atmospheric Tomography with Fourier Domain Regularization (SAFER)

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
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...