Conveners
Session 1:Imaging and inversion I
- Andreas Fichtner (ETH Zurich)
- Jürgen Hesser (Heidelberg University)
Joost van der Neut
(Delft University of Technology)
11/1/17, 9:30 AM
Main Track
Oral
In acoustic inversion, we aim to retrieve the density and compressibility of an unknown medium from single-sided reflection data by solving a nonlinear integral equation. If the wavefield is known throughout the medium, this equation simplifies as a linear map between the medium properties and the reflection data. We aim to realize such a map by substituting the solution of a Marchenko...
Frank Natterer
(University of Münster)
11/1/17, 9:50 AM
Main Track
Oral
When only reflection data are available, imaging with the wave equation is much more difficult then in the presence of transmission measurements. This is because reflection data are spectrally incomplete due to fact that frequencies close to zero can not be used.
In the talk we describe the mathematical problem and suggest a numerical method of data completion that generates the missing low...
Ulas Taskin
(Delft University of Technology)
11/1/17, 10:10 AM
Main Track
Oral
In a real ultrasound measurement system, acoustic waves show 3-D propagation characteristics. However, in a majority of recently developed wave based imaging methods, the inverse problem is solved in a 2-D framework due to computational restrictions. This reduction causes problems during inversion. In this work, we use a 2-D approximation for the measured 3-D incident field and show that using...
