International Workshop on Medical Ultrasound Tomography

Session

Session 1:Imaging and inversion I

Nov 1, 2017, 9:30 AM

Conveners

Session 1:Imaging and inversion I

• Andreas Fichtner (ETH Zurich)
• Jürgen Hesser (Heidelberg University)

25. One-dimensional Marchenko inversion in stretched space

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...

27. Ultrasound imaging from reflection data

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...

42. Using 2-D approximation of the 3-D incident field for Born inversion

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...